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  • Offer Profile
  • Franke Wire Race Bearings and Linear Systems.

    We develop and produce Wire Race Bearings and Linear Systems, which are precisely adjusted to suit the needs of our customers. Individuality and quality are our trademarks.
Product Portfolio
  • Wire Race Bearings and Linear Systems

       
        • Fields of Innovation

          • Competence in lightweight construction

            Thanks to their patented technology, Franke wire race bearings offer maximum design freedom without compromising load carrying capacity. The enclosing construction can be realized in a variety of lightweight materials and its geometry can be optimally adapted to the respective application. With our many years of experience in the design of individual bearing solutions, we can provide you with optimum support when it comes to lightweight construction - from development to assembly, our experts are always available to provide you with competent support..

              • Franke bearing assembly
                with 3D print housing

              • Franke carbon bearing assembly
                in angular contact ball bearing design

              • Direct drive

              • Why roller bearings with direct drive?

                Franke wire race bearings with integrated direct drive are characterized by highest energy efficiency. The integration of the drive motor into the bearing makes it possible to dispense with components such as gears and drive pinions and thus with complex lubrication circuits. The moving masses are therefore significantly lower and the loss of performance due to factors such as friction and play is minimized.

                Functionality of Franke roller bearings with direct drive

                Torque motors are integrated directly into Franke bearing assemblies. The customer receives a completely ready to install system. This makes it possible not only to generate a rotational movement, but also to position or execute definable cycle steps.

                The torque motor has a high torque at a defined speed range. The distance between the stator and rotor (air gap) is decisive for the magnitude of the torque. The preloaded Franke bearing assembly guarantees a constant air gap. A measuring system can be used to determine the motor position.

              • Alternative materials

              • Special materials for special properties
                The use of alternative materials in bearing constructions as well as state of the art production technologies allow Franke bearings to be optimally adapted to the application. The material used influences properties such as:

                • the weight,
                • the load capacity and robustness,
                • the suitability for certain environments (dirt, humidity, clean room, vacuum, food).

                Materials

                • Aluminium - over 50 % lighter than steel
                • Carbon (CFK) - 75 % lighter and highly resilient
                • Plastic - 80 % lighter, durable and quiet
                • 3D printing - 90 % lighter and very variable
                • Amagnetic steel - for medicine and research
                • Stainless steel - for food
            • News

                  • 3D-printed bearings for aviation industries

                  • Integrated bearing elements enable space saving and extra light constructions.
                  • Bearing assembly in Carbon design

                  • The challenge: the ultra-lightweight carbon bearing

                    The specific gravity of CFRP is only about 50% of aluminum. The tremendous variety of processing possibilities of carbon fiber to complex structures of highest and rigidity is another reason for the popularity of CFRP in lightweight design.

                    The layout and design of the bearing rings was performed using 3D CAD models. The grain structure was designed so that the loads placed on the bearing only affect the bearing in tension and compression.

                    All components are made extremely thin. The inner ring of the bearing assembly is divided, the outer ring is made in one piece. The adjustment of the bearing is done by shims. The carbon housing is provided for attachment to the connecting structure with sleeves made of aluminum. This results in a safe fastening of the connecting parts without stressing the carbon structure.

                    Load ratings correspond to the equivalent bearing assemblies of aluminum. The stiffness is slightly lower in the radial direction, the tilting rigidity even slightly higher than a comparable aluminum bearing.

                  • Direct Drive Bearings

                  • Less is more

                    Franke wire race bearings with integrated direct drive give you highest energy efficiency. The integration of the motor directly to the bearing, makes it possible to entirely dispense components such as gear and drive pinion. The moving masses thus fall significantly lower – the power loss by factors such as friction and backlash is minimized.

                    The Franke wire race principle also offers the advantage of the free choice of material for the Gehäsue. The use of lightweight materials such as aluminum, plastic or carbon allows significant weight savings. The engine can be built smaller, which leads to enery saving of up to 30%.

                    Quick and accurat

                    Due to their special design bearings with direct drive offer clear advantages in terms of precision and dynamics:

                    The driving force in the bearing and the power transmission without further mechanical parts guarantees maximum positioning accuracy even at high speeds. Low moving masses and optimal weight distribution minimize friction or vibration.

                    Silent running even at high speed

                    Franke wire race bearings with direct drive feature smooth and silent runing even at high rotational speeds.

                    Maximum Performance – Space Saving Design

                    Direct drive bearings are particularly suitable for applications in which
                    high performance and small mounting space are important criteria. The
                    integration of the complete drive system into the bearing housing means
                    that components subject to heavy wear for the conventional transmission of
                    drive power such as toothed belts, shafts or chains can be omitted. This also
                    enables a more accurate positioning.

                • Bearing Elements

                  • Four wires for better design

                    The decisive difference between an ordinary ball bearing and a Franke wire race bearing is in the raceways. In a wire race bearing, the rolling elements do not roll on solid housing rings, but on high performance wires. The flexibility of this principle makes it possible to design more freely and simply, in order to develop better products.

                    Runs precisely. And runs precisely. And runs precisely.

                    In wire race bearings, the raceways of the rolling elements are precisely matched to the diameter of the rolling elements. This ensures optimum functional characteristics and guarantees both, precise running and a long operating life.

                    Shock and impact elastic

                    The races of Franke wire race bearings are made of hardened spring steel. Shocks and vibrations are absorbed by them. The result: a high resistance against such disturbing influences.

                    Compensates deformations

                    Slight deformations of the enclosing structures, for example due to temperature changes, are compensated by the flexible Franke bearing element. Where other roller bearings fail, the Franke bearing continues to roll.

                    No bearing play. Adjustable rotational resistance.

                    Does your application focus on dynamics or precision? Or does a good compromise have to be found? The rotational resistance of a wire race bearing is adjustable. Suitable for each application. At any time.

                    Possibilities instead of specifications

                    Franke bearing elements can be used in a wide variety of designs. The demands on the enclosing construction are low, because it is not directly exposed to the loads. The main load is borne by the wire race bearing. This allows you to determine almost freely the ideal shape and material of your further construction.

                    • Maximum possible integration capacity
                    • Series application to meet cost constraints
                    • Greatest possible flexibility based on preload, runnability and diameter ranges
                    • Infinitely variable from 70 to 2000 mm
                      • Type LEL - Ground raceway

                      • Bearing Type:
                        • 4 race rings with ground raceways
                        • Plastic ball cage with retained balls
                        Characteristics:
                        • Maximum possible integration capacity
                        • Series application to meet cost constraints
                        • Greatest possible flexibility based on preload, runnability and diameter ranges
                        Diameter range:
                        • Infinitely variable from 70 to 2000 mm
                        Franke bearing elements in type LEL meet high standards in terms of runnability and accuracy. Their hardened and CNC-ground raceways, along with the ideal geometric adjustment of ball and raceway radius, lend them outstanding bearing properties. Bearing elements in the LEL type permit the greatest possible freedom of bearing design. The standard mounting space is between 5.9 mm and 20.9 mm. Race ring thickness of up to 20 mm and bearing sizes up to 50 mm are possible to meet special requirements.
                      • Type LER - Rectangular profile/profiled raceway

                      • Bearing Type:
                        • 4 race rings with profiled raceways
                        • Plastic ball cage with retained balls
                        Charakteristics:
                        • Maximum possible integration capacity
                        • Series application to meet cost constraints
                        • Greatest possible flexibility of preload, runability and diameter ranges
                        Diameter range
                        • infinitely variable from 70 to 2000 mm
                        Franke bearing elements in type LER are designed for medium rotational speeds and accuracies. They run smoothly, possess high dynamism and require just compact mounting space. The straight contact surface ensures simple integration in the mating structure and also a high rigidity. The attractive price makes this bearing element type LER an economic solution.
                      • Type LEW

                      • Bearing Type:
                        • 4 race rings with ground raceways
                        • Plastic cage with rollers
                        Charakteristics:
                        • Maximum possible integration capacity
                        • High stiffness
                        • Greatest possible flexibility of preload, runability and diameter ranges 
                        Diameter range
                        • infinitely variable from 400 to 1200 mm
                        Franke bearing elements in type LER are designed for medium rotational speeds and accuracies. They run smoothly, possess high dynamism and require just compact mounting space. The straight contact surface ensures simple integration in the mating structure and also a high rigidity. The attractive price makes this bearing element type LER an economic solution.
                      • Type LSA - Slim Bearings

                      • Bearing type:
                        • 2 Race rings with profiled raceways
                        • Plastic cage with retained balls
                        Characteristics:
                        • Simple, compact integration, LSA, infinitely variable Ø range
                        • Cost-effective alternative to standard slim bearings
                        • Not preloaded bearings
                        Diameter range:
                        • Infinitely variable from 3" to 30"
                        Franke slim bearings of type LSA deliver a convincingly smooth run, require extremely compact mounting space, ensure simple assembly and come at a favorable price.
                    • Bearing Assemblies

                      • If required, we can also design and manufacture complete bearing assemblies for you. These can be mounted even more easily than bearing elements. Franke bearing assemblies are available in every size, with individual bores and toothings and in numerous materials such as aluminium, stainless steel, carbon or as a 3D printed housing.
                          • Type LVA steel

                          • Bearing type:
                            • Bearing assembly in steel design
                            Charakteristics:
                            • Ready to install, wide selection range
                            • Preloaded free from clearance
                            • Selected diamters available ex works
                            Diameter range:
                            • from 100 - 1800 mm
                            LVA is a bearing assembly with housing rings made of steel and integrated bearing element. Franke bearing assemblies in
                            type LVA are designed for medium rotational speeds and accuracies. They are available on short notice, in some cases
                            even from the warehouse.
                          • Type LVB aluminium

                          • Bearing type:
                            • Bearing assembly in aluminum design
                            Charakteristics:
                            • Ready to install, wide selection range
                            • Preloaded free from clearance
                            • Selected diamters available ex works
                            Diameter range:
                            • from 100 - 1800 mm
                            LVB is a bearing assembly with housing rings made of aluminium and integrated bearing element. Franke bearing assemblies in type LVB are designed for medium rotational speeds and accuracies. They are available on short notice, in some cases even from the warehouse.
                          • Type LVC angular 2row

                          • Bearing type:
                            • Bearing assembly in steel design
                            • Integrated double-row angular ball baring
                            Characteristics:
                            • Ready to install, wide selection range
                            • Preloaded free from clearance
                            • For high speed and acceleration
                            Diameter range:
                            • Infinitely variable from 100 - 1800 mm
                            LVC is a bearing assembly designed as double-row angular contact ball bearing made of steel with two integrated bearing elements. Franke bearing assemblies in type LVC are suitable for the highest circumferential speeds. Convincing aspects include their high dynamism and low rotational resistance.
                          • Type LVD toothed/steel

                          • Bearing type:
                            • Bearing assembly in steel design with external gear
                            Characteristics:
                          • Ready to install, large selection range
                          • Preloaded free from clearance
                          • Available on short notice
                          • Diameter range:
                            • Infinitely variable from 100 - 1800 mm
                            LVD is a bearing assembly with external gear type and housing rings made of steel and integrated bearing element. Franke bearing assemblies in type LVD are designed for medium rotational speeds and accuracies. They are available on short notice, in some cases even from the warehouse.
                          • Type LVE toothed/aluminium

                          • Bearing type:
                            • Bearing assembly in aluminum design / toothed belt gear
                            Characteristics:
                            • Ready to install, large selection range
                            • Perloaded freee from clearance
                            • Available on short notice
                            Product range:
                            • Infiniteley variable from 100 - 1800 mm
                            LVE is a bearing assembly with toothed belt gear type and housing rings made of aluminium and integrated bearing element. Franke bearing assemblies in type LVE are designed for medium rotational speeds and accuracies. They are available on short notice, in some cases even from the warehouse.
                          • Type LVG rollers

                          • Bearing type:
                            • Bearing assembly in aluminum design with rollers
                            Characteristics:
                            • Ready to install
                            • Preloaded free from clearance
                            Diameter range:
                            • from 200 - 400 mm
                            LVG is a 2-row angular roller bearing with aluminum housing and two integrated bearing elements. Franke bearing assemblies type LVG are suitable for highest load capacities. They convince by high rigidity, low rotational resistance and low weight.
                        • Rotary Tales, Rotary Systems, Worm drive/highly dynamic

                          • You prefer a complete solution from one source? Franke offers complete customized positioning and drive units, optionally with proximity switch, coupling and motor. Systems with direct drive are a particular strength of Franke. They are used, for example, in many computer tomographs of renowned manufacturers.
                              • Type LTA - Rotary Tables

                              • Franke rotary tables type LTA are light, compact, ready to install positioning units for speeds up to 100 rpm. They are highly loadable and have excellent concentricity and axial run-out accuracy. Rotary tables LTA are versatile and are particularly suitable for light machining tasks as well as dynamic handling and assembly applications.

                                • Material:
                                  Base plate: Aluminium
                                  Housing: V2A
                                  Race rings: 54SiCr6
                                  Rolling element: 100Cr6
                                  Worm wheel: Wear-resistant bronze alloy
                                  Worm shaft: CK45N hardened and grinded
                                • Reduction ratio:
                                  18:1 (LTA100)
                                  36:1 (LTA200)
                                • Operating temperature: -10 °C to +80 °C
                                • Rotational speed: Max. 100 min-1
                                • Mounting position: Any, preferably horizontal
                                • Lubricant: With bearing grease via grease nipples
                                • Options: Inductive proximity switch, flange/coupling to mount the motor, motorization
                              • Type LTB - Rotary Tables

                              • Franke rotary tables of type LTB are centerless, ready to install positioning units. The housing is made of light aluminium. Franke LTB are highly loadable and have an excellent angular accuracy and resolution. They can be used in a wide range of applications and are particularly suitable for movement and positioning tasks in the field of measuring, testing and orientation.

                                • Material:
                                  Housing: Aluminium ribbed
                                  Race rings: 54SiCr6
                                  Rolling element: 100Cr6
                                  Worm wheel: Wear-resistant bronze alloy
                                  Worm shaft: CK45N hardened and grinded
                                • Reduction ratio: 360:1
                                • Operating temperature: -10 °C to +80 °C
                                • Rotational speed: Max. 7 min-1
                                • Mounting position: Any, preferably horizontal
                                • Lubricant: With bearing grease via grease nipples
                                • Options: Inductive proximity switch, flange/coupling to mount the motor, motorization
                              • Type LTD - Rotary Tables

                              • Bearing assemblies with direct drive are suitable for applications where high performance and low space requirements are important criteria. The integration of the drive into the bearing housing means that wear-prone assemblies for transmitting drive power, such as toothed belts, shafts or chains, can be dispensed with. This reduces the required drive energy and also benefits more accurate positioning.

                                • Material: C45N (optionally aluminium)
                                • Operating temperature: -10 °C to +80 °C
                                • Mounting position: Any
                                • Lubricant: With bearing grease via grease nipple
                                • Options: Absolute measuring system, axial cable outlet, control units incl. cables, water-cooling
                            • Applications

                              • Our customers are as diverse as our product program. They are at home in fields such as mechanical engineering, medical technology or the textile industry. The trust that our customers place in us and our products confirms: Our Wire Race Bearings are convincing thanks to their high performance and flexibility - irrespective of the machine or the industry in which they are used.
                                  • Hubless rim on a Formula Student race car

                                  • Requirements

                                    The aluminium-carbon rim on an electric race car should be designed to accommodate the drive and braking systems in its center. The bearings used must require very little mounting space and possess a large open center. Plus they need to securely transfer substantial forces and torques.

                                    Solution

                                    Franke Wire Race Bearing, integrated directly in the housing components of the rim as double row angular contact ball bearings. The Wire Race Bearing handles the prevalent loads and works independent of the material used in the mating components. The wires and the rolling elements require minimal mounting space.

                                    Advantages

                                    Space-saving bearing solution with large open center. Its arrangement as double row angular contact bearings permits extremely dynamic movement processes.

                                  • Placement head for printed circuit board production

                                  • Requirements

                                    Bearing for a high-performance placement head in printed circuit board production with a cycle frequency of 18 start/stop movements per second and up to 120 million revolutions over five years. The service life is defined as ten years. The bearing must be free from clearance in all directions at 70°C so that the components can be fitted precisely.

                                    Solution

                                    Franke special bearing assembly LDB0110. Aluminium (Dispal) is used as the material for the inner and outer ring. It has almost the same thermal expansion coefficient as steel, facilitating constant unit set values across the entire temperature range.

                                    Advantages

                                    Customer-specific design, which meets all requirements with regard to size, material and mounting dimensions. The integrated bearing element has a small cross section, giving the customer a compact, but nevertheless lightweight design. Franke is the only manufacturer worldwide that can satisfy these specifications.

                                  • Rotary index table

                                  • Requirements

                                    The bearing used must guarantee smooth and clean operation of the rotary tables in their designated applications, and must also ensure high repeatability precision with simultaneous positioning accuracy. The system moves heavy payloads.

                                    Solution

                                    Bearing elements LEZ with bearing diameter 400 to 1500mm.
                                    Engineered with a variety of wire races and ball combinations.

                                    Advantages

                                    The Franke LEZ bearing elements used are designed precisely to suit the various loads and hence guarantee smooth and clean movements of the rotary tables. Additionally, the 4-point system has no difficulty withstanding the prevailing loads.

                                  • Azimuth bearings for solar panels

                                  • Requirements

                                    Bearing assembly to swivel the solar panel. Very slow-moving worm gear to follow the path of the sun. High stiffness to cope with any wind pressure.

                                    Solution

                                    Wire Race Bearings as bearing elements.
                                    The system uses wire diameters of 7mm and ball diameters of 20mm to achieve the requisite load rating and stiffness. Other modifications: Special osculation and spherically seated design.

                                    Advantages

                                    Low mounting space thanks to direct integration in the cast housing of the rotary drive. High load rating and stiffness, also attractive series price and other advantages.

                                  • Cardanic suspension of an aerial camera

                                  • Requirements

                                    Light, customized bearings are required for the articulation of the cardanic suspension; they must possess high stiffness while at the same time remaining smooth and with low breakaway torque and rotational resistance. Forces and torques occur from all directions. The bearings must not impede the camera's imaging quality.

                                    Solution

                                    LDB155 on high-strength aluminium with customized bore pattern. Anodized-orange by request of the customer.

                                    Advantages

                                    Bearing material, design and coating based on customer specifications. The 4-point contact bearing can accommodate forces from all directions and is insensitive to temperature fluctuation and vibrations. Smooth bearing with concomitant, high stiffness, at a favorable price.

                                  • Tool exchanger

                                  • Requirements

                                    The tool exchanger in the machining center houses a bearing assembly to position the various tools in place on the machining head. A high degree of precision is needed to securely grab the tools at any time.

                                    Solution

                                    Franke bearing assembly with gear in a diameter range of 630 to 1092mm.

                                    Advantages

                                    The large open center in the Franke bearing assemblies means that the entire drive system can be moved inside. A labyrinth and a lip seal protect the raceways from chips and coolants. The tool holders are fitted directly to the outer ring. The selected preload ensures high precision and constant rotational resistance for high operating smoothness and precision.

                                  • Articulated robot

                                  • Requirement

                                    The lightweight robot is used as a service robot and mobile robot. The net weight of the robot is 10kg with a rated load of 3kg. It consists of CFK materials with good rigidity and low mass. Bearings are planned for use in the movement axes. Their main requirements are also high stiffness, low weight and small mounting space.

                                    Solution

                                    Bearing elements in the LEZ64 and LEL84 series.

                                    Advantages

                                    Bearing elements only require minimal mounting space and are built in directly to the design of the robot. The material of the mating structure does not therefore depend on the bearing and can be freely selected. High bearing strength in all directions

                                  • Wheel hub and direct drive

                                  • Requirements

                                    A concept vehicle is to be motorized by one direct drive unit per wheel. This requires a bearing system with compact mounting space and sufficient load-bearing capacity. The maximum revolutions is 1000 rpm. The balls must be non-magnetic, as they are fitted adjoining the direct drive.

                                    Solution

                                    Four LES0380 – 5/9.525, including ceramic balls.

                                    Advantages

                                    Customized bearings for direct integration in the customer-side design. Accommodation of forces from all sides, including tilting torque. Mounting space designed in cooperation with the customer. Joint assembly of the prototype at Franke.

                                  • X-ray device

                                  • Requirements

                                    The curved imaging unit of an X-ray device encloses a gurney. This so-called C-arch must be light and evenly shaped, also tiltable by hand.

                                    Solution

                                    Franke Wire Race Bearings as segment bearings.

                                    Advantages

                                    Direct integration of the race segments in the housing components saves space and costs. The segment bearing is set free from clearance and can be moved by hand with a defined resistance. The movement is quiet and even. The 4-point contact bearing easily accommodates the high torque forces in any travel position.

                                  • Fan

                                  • Requirements

                                    A totally quiet bearing system has to be found for the fan of a living-room ventilator. The bearing must compensate a certain degree of manufacturing tolerance in the injection-moulded housing. The housing is compactly designed; there is only a small mounting space available for the bearing to be used.

                                    Solution

                                    Bearing element LEZ367 with 2.5mm wire races and 6mm balls.

                                    Advantages

                                    In order to further minimize the noise, the ball cage of the bearing unit is only fitted with every second ball. The injection moulded housing was optimized to facilitate series assembly by the customer. The position of the bearing can be adjusted by means of an adjusting ring.

                                  • Computer tomography machine

                                  • Requirements

                                    The main bearing on the computer tomography machine is one of the elements responsible for ensuring that precise images are delivered. It must run quietly and with low vibrations, even at high speeds. It is necessary to guarantee exact radial and axial run-out.

                                    Solution

                                    A customized, patented Franke Flüsterlager® with elastomer.
                                    Besides excellent running, the Franke CT bearings also come with ideal rotational resistance. The radial and axial run-out is just a few hundredth millimeters, depending on the engineering and diameter. All Franke CT bearings can be calibrated to suit customer specifications. The inner elasticity keeps the bearing outstandingly robust, even when exposed to the toughest conditions of use.

                                    Advantages

                                    Extremely smooth running at up to 300 rpm. The elastomer suppresses the noise generation (60dBA). The bearing possesses a low rotational resistance (< 20Nm) and electrical insulation between the inner and outer ring. Loads in excess of 1000kg are possible.

                                  • Laseroptics in airplanes

                                  • Anforderungen

                                    Es werden Wälzlager mit hoher Steifigkeit und höchster Genauigkeit für den Einsatz zur Flugzeugprotektion benötigt. Die Lager müssen Wärmeausdehnung ausgleichen können.

                                    Lösung

                                    Drehverbindung LDB80/295 als Zylinderrollenlager aus Aluminium mit einem Durchmesser von 295 mm.
                                    Außerdem wird eine weitere Drehverbindung in Form eines Drei-Punkt-Lagers eingesetzt.

                                    Vorteile

                                    Die Drehverbindung LDZ besitzt einen Rund- und Planlauf von 0,03 mm. Eine Gewichtsersparnis wird durch die leichte Aluminium-Konstruktion erreicht. Die Tragzahlen, die Steifigkeit und die Genauigkeit des Lagers sind durch die Laufringe vorgegeben. Das zweite Lager besitzt einen Tragwinkel von 45° (Drei-Punkt-Lager). Der Außenring ist beweglich, um die auftretenden Wärmeausdehnungen optimal auszugleichen.

                                  • Satellite antenna on seagoing vessels

                                  • Requirements

                                    The bearing requires high stiffness across its entire service life (shock stress due to waves and swell). The system must possess non-corrosive properties and provide constant rotational resistance across temperature ranges from –25°C to +60°C.

                                    Solution

                                    The bearing assembly LDA166 in its steel version with adjusting ring, including coating and LER bearing element.

                                    Advantages

                                    The steel solution delivers constant rotational resistance across the entire temperature range. An additional inlet process with readjustment guarantees high stiffness over the whole service life.

                                  • Mobile satellite antenna

                                  • Requirements

                                    The main bearing for a mobile satellite antenna must not weigh over 1kg. Smooth running with simultaneous tilting stiffness must be guaranteed.

                                    Solution

                                    Franke bearing assembly LDB200 made of aluminium, with inner ring geared on the outside.

                                    Advantages

                                    Complete bearing assembly, ready for installation, made of aluminium and with tooth belt gear. Large open center and low mounting space thanks to the compact structure.

                                  • Beverage bottling

                                  • Requirements

                                    Precise filling volumes of still water are filled in plastic bottles with the highest standards of microbiological and hygienic safety. The centrepiece of the machine is a filling pipe whose inlet aperture possesses a diameter of between 40 and 100 mm, depending on the size of the bottling system. The carousel is filled via the column. The column is fitted with one locating and one floating bearing, respectively. The bearings used must be lubricant-free and also non-corrosive.

                                    Solution

                                    Franke bearing assembly series LDC 250 as angular contact ball bearing.

                                    Advantages

                                    The bearing assembly is designed to be suitable for food in a non-corrosive version with bearings made of oxide ceramics. The bearing operates with revolutions of 10 rpm and possesses a radial and axial run of 0.03 mm. The bearing absorbs axial forces of 1500 N emanating from the filling pipe. The components are heated to 130°C every 48 hours in order to kill germs. To satisfy hygienic requirements, the bearing assembly is designed to be lubricant-free, i.e. uses a special lubrication with food industry grease.

                                • Linear Systems

                                  • Linear Systems: highly dynamic, fast, quiet

                                    Franke linear systems transfer the ingenious principle of the wire-race bearing to linear movements. Inserted raceways ensure the load capacity on all sides. The rest of the construction can therefore be made of lightweight aluminum. Large guided rollers ensure smooth running - maintenance-free over the entire service life. Thanks to their modular design, Franke linear systems can be individually adapted to requirements.

                                      • Accelerate more easily

                                      • Franke linear systems are the first choice when highest dynamics are required. The large rollers are mounted very smoothly. They run with low friction and precisely guided on the inserted tough and hard steel wires. Because almost exclusively light aluminum is used for the entire construction, the moving mass is low. The result: Highest dynamics and energy efficiency.
                                      • Designing homogeneously with aluminum

                                      • The main components of Franke linear systems - rails and cassettes - are made of aluminium. Franke linear systems are ideally suited for constructions made of aluminum, because the homogeneous materiality excludes temperature-related distortions.
                                      • The quieter the better

                                      • Where Franke linear systems are used, you hear almost nothing from them. Only a quiet, homogeneous noise can be heard. This makes them ideally suited for noise sensitive applications. Furthermore, the whisper-quiet operation is an audible quality feature.
                                      • Highly accurate and durable

                                      • Franke's core competence lies in the high-precision manufacture and machining of wire raceways. The pursuit of precision determines every single step of our work. The result is bearing solutions with outstanding accuracy values and an excellent service life.
                                      • Patented guidance

                                      • Franke track rollers have a groove adapted to the wire tracks. This patented type of guidance prevents the rollers from sliding on their bearing pins and rubbing against the housing. The advantage: a lower friction, more controlled movement.
                                      • Loadable on all sides

                                      • The rollers are arranged crosswise and run on one of the four wires each. In this way, forces are absorbed on all sides and the installation position can be freely determined. Depending on the profile rail used, the bearing can be designed with an external guide in an O arrangement (figure right) or with an internal guide in an X arrangement.
                                      • Maintenance-free - carefree

                                      • The needle or ball bearings used in the rollers are lubricated for life. This means that no maintenance is required over the long life of a Franke linear guide. For applications in the food industry we also offer lubricant-free roller bearings.
                                      • Always the right sliding resistance

                                      • The sliding resistance of Franke linear guides can be adjusted to the application at any time using an adjusting screw. Very fine adjustments are possible. This allows the system to be adapted to the load - in the direction of smooth running or in the direction of stiffness and vibration resistance.
                                    • Linear Guides

                                        • Aluminium roller guides in various designs (e.g. non-corrosive, lubricant-free, LowCost)
                                        • All variations with inserted steel raceways
                                        • Large rollers for smooth and quiet running
                                        • Individually adjustable slide resistance
                                        • Infinitely variable from 200 to 4000 mm in one piece, infinitely coupled for longer stroke lengths
                                          • Double rail with Cassette

                                                • Linear guide double rail Standard Type FDA-K

                                                • Aluminum roller guides of type FDA convince with the highest load capacity of all Franke linear guides as well as very good dynamics.

                                                  Franke FDA linear guides are equipped with very quiet and smooth-running, high-quality needle bearings and consist almost entirely of lightweight aluminium. The sealed roller bearings enable maintenance-free operation over the entire service life. Rail elements can be manufactured in lengths from 200 mm to 4000 mm and can be endlessly coupled.

                                                  • Stroke length: One-piece from 200 mm to 4000 mm, endless coupling
                                                  • Material:
                                                    Cassette plate, roller shoes,
                                                    Rail body: anodised aluminium
                                                    Running tracks: Spring Steel
                                                    Rollers: Rolling bearing steel
                                                  • Operating temperature: -20 °C to +80 °C
                                                  • Maximum speed: 10 m/s
                                                  • Mounting position: Any
                                                  • Lubrication: lubricated for life, maintenance-free
                                                • Linear Guides Double rail Low cost Type FDB-K

                                                • Aluminum roller guides of type FDB are equipped with ball bearings and convince with a particularly low price.

                                                  Franke FDB linear guides are suitable for linear motion tasks in almost all industries. They are particularly convincing in cost-sensitive applications with reduced demands on load capacity. Rail elements can be manufactured in lengths from 200 mm to 4000 mm and can be coupled endlessly.

                                                  • Stroke length: One piece from 200 mm to 4000 mm, endlessly connectable
                                                  • Material:
                                                    Cassette plate, roller shoes,
                                                    Rail body: aluminum, anodized
                                                    Raceways: spring steel
                                                    Rollers: bearing steel
                                                  • Operating temperature: −20 °C to +80 °C
                                                  • Maximum speed: 10 m/s
                                                  • Mounting position: Any
                                                  • Lubrication: Lifetime-lubricated, maintenance-free
                                                • Linear Guides Double rail Non-corrosive Type FDC-K

                                                • FDC aluminum roller guides are insensitive to harsh environmental conditions.

                                                  Franke FDC linear guides are equipped with very quiet, smooth-running, high-quality needle bearings and are made almost entirely of lightweight aluminum. Inlaid raceways made of corrosion-resistant steel make them insensitive to environmental influences as well as moisture or cleaning agents. Rail elements can be manufactured in lengths from 200 mm to 4000 mm and can be coupled endlessly.

                                                  • Stroke length: One piece from 200 mm to 4000 mm, endlessly connectable
                                                  • Material:
                                                    Cassette plate, roller shoes,
                                                    Rail body: aluminum, anodized
                                                    Raceways: corrosion resistant steel
                                                    Rollers: corrosion resistant bearing steel
                                                  • Operating temperature: −20 °C to +80 °C
                                                  • Maximum speed: 10 m/s
                                                  • Mounting position: Any
                                                  • Lubrication: Lifetime-lubricated, maintenance-free
                                                • Linear Guides Double rail Non-magnetic Type FDD-K

                                                • Aluminum roller guides of the type FDD in non-magnetic design convince by magnetic neutrality and by a light and quiet running.

                                                  Franke FDD linear guides are suitable for linear motion tasks in almost all industries. Non-magnetic tracks without influencing the prevailing magnetic fields make them ideal components e.g. in medical technology or in electronics manufacturing. Rail elements can be manufactured in lengths from 200 mm to 4000 mm and can be coupled endlessly.

                                                  • Stroke length: One piece from 200 mm to 4000 mm, endlessly connectable
                                                  • Material:
                                                    Cassette plate, roller shoes,
                                                    Rail body: aluminum, anodized
                                                    Raceways: non-magnetic steel
                                                    Rollers: non-magnetic bearing steel
                                                  • Operating temperature: −20 °C to +80 °C
                                                  • Maximum speed: 1 m/s
                                                  • Mounting position: Any
                                                  • Lubrication: Lifetime-lubricated, maintenance-free
                                                • Linear Guides Double rail Lubricant free Type FDE-K

                                                • Aluminum roller guides of type FDE are equipped with lubricant-free and needle-bearing rollers.

                                                  Franke FDE linear guides are equipped with lubricant-free, high-quality needle bearings and are made almost entirely of lightweight aluminum. They are suitable for linear motion tasks in almost all industries, especially for use in food production or in clean rooms. Rail elements can be manufactured in lengths from 200 mm to 4000 mm and can be coupled endlessly.

                                                  • Stroke length: One piece from 200 mm to 4000 mm, endlessly connectable
                                                  • Material:
                                                    Cassette plate, roller shoes,
                                                    Rail body: aluminum, anodized
                                                    Raceways: spring steel
                                                    Rollers: bearing steel
                                                  • Operating temperature: −20 °C to +80 °C
                                                  • Maximum speed: 1 m/s
                                                  • Mounting position: Any
                                                  • Lubrication: Lubricant free, maintenance free
                                                • Linear Guides Double rail Non-corrosive Low cost Type FDG-K

                                                • Aluminum roller guides of type FDG are equipped with stainless steel raceways and ball bearings. They offer insensitivity to environmental influences at an affordable price.

                                                  Franke FDG linear guides are suitable for linear motion tasks in almost all industries. They are particularly convincing in cost-sensitive applications in harsh environments and with reduced demands on load capacity. Rail elements can be manufactured in lengths from 200 mm to 4000 mm and can be coupled endlessly.

                                                  • Stroke length: One piece from 200 mm to 4000 mm, endlessly connectable
                                                  • Material:
                                                    Cassette plate, roller shoes,
                                                    Rail body: aluminum, anodized
                                                    Raceways: corrosion resistant steel
                                                    Rollers: corrosion resistant bearing steel
                                                  • Operating temperature: −20 °C to +80 °C
                                                  • Maximum speed: 10 m/s
                                                  • Mounting position: Any
                                                  • Lubrication: Lifetime-lubricated, maintenance-free
                                                • Linear Guides Double rail Highly dynamic Type FDH-K

                                                • Aluminum roller guides of type FDH convince with their particularly quick response and smooth running even at high acceleration.

                                                  Franke FDH linear guides are suitable for linear movement tasks, especially in dynamic pick-&-place applications. They have rollers with angular contact ball bearings for the highest acceleration and speed values, for example when using linear motors as the drive source. Rail elements can be manufactured in lengths from 200 mm to 4000 mm and can be coupled endlessly.

                                                  • Stroke lengt: One piece from 200 mm to 4000 mm, endlessly connectable
                                                  • Material:
                                                    Cassette plate, roller shoes,
                                                    Rail body: aluminum, anodized
                                                    Raceways: spring steel
                                                    Rollers: bearing steel
                                                  • Operating temperature: −20 °C to +80 °C
                                                  • Maximum speed: 10 m/s
                                                  • Mounting position: Any
                                                  • Lubrication: Lifetime-lubricated, maintenance-free
                                                • Linear Guides Double rail Vacuum suitable Type FDI-K

                                                • Description
                                              • Pair of Single rails and pair of Roller shoes

                                                    • Linear Guides Pair of single rails Standard Type FDA-R

                                                    • Aluminum roller guides of type FDA convince with the highest load capacity of all Franke linear guides as well as very good dynamics.

                                                      Franke FDA linear guides are equipped with very quiet, smooth-running, high-quality needle bearings and are made almost entirely of lightweight aluminum. The sealed roller bearings enable maintenance-free operation over the entire service life. Rail elements can be manufactured in lengths from 200 mm to 4000 mm and can be coupled endlessly.

                                                      • Stroke length: One piece from 200 mm to 4000 mm, endlessly connectable
                                                      • Material:
                                                        Cassette plate, roller shoes,
                                                        Rail body: aluminum, anodized
                                                        Raceways: spring steel
                                                        Rollers: bearing steel
                                                      • Operating temperature: −20 °C to +80 °C
                                                      • Maximum speed: 10 m/s
                                                      • Mounting position: Any
                                                      • Lubrication: Lifetime-lubricated, maintenance-free
                                                    • Linear guides Pair of single rails Low cost Type FDB-R

                                                    • Aluminum roller guides of type FDB are equipped with ball bearings and convince with a particularly low price.

                                                      Franke FDB linear guides are suitable for linear motion tasks in almost all industries. They are particularly convincing in cost-sensitive applications with reduced demands on load and noise. Rail elements can be manufactured in lengths from 200 mm to 4000 mm and can be coupled endlessly.

                                                      • Stroke length: One piece from 200 mm to 4000 mm, endlessly connectable
                                                      • Material:
                                                        Cassette plate, roller shoes, rail body: aluminum, anodized
                                                        Raceways: spring steel
                                                        Rollers: bearing steel
                                                      • Operating temperature: −20 °C to +80 °C
                                                      • Maximum speed: 10 m/s
                                                      • Mounting position: Any
                                                      • Lubrication: Lifetime-lubricated, maintenance-free

                                                    • Linear guides Pair of single rails Non-corrosive Type FDC-R

                                                    • FDC aluminum roller guides are insensitive to harsh environmental conditions.

                                                      Franke FDC linear guides are equipped with very quiet, smooth-running, high-quality needle bearings and are made almost entirely of lightweight aluminum. Inlaid raceways made of corrosion-resistant steel make them insensitive to environmental influences as well as moisture or cleaning agents. Rail elements can be manufactured in lengths from 200 mm to 4000 mm and can be coupled endlessly.

                                                      • Stroke length: One piece from 200 mm to 4000 mm, endlessly connectable
                                                      • Material:
                                                        Cassette plate, roller shoes,
                                                        Rail body: aluminum, anodized
                                                        Raceways: corrosion resistant steel
                                                        Rollers: corrosion resistant bearing steel
                                                      • Operating temperature: −20 °C to +80 °C
                                                      • Maximum speed: 10 m/s
                                                      • Mounting position: Any
                                                      • Lubrication: Lifetime-lubricated, maintenance-free
                                                    • Linear guides Pair of single rails Non-magnetic Type FDD-R

                                                    • Aluminum roller guides of the type FDD in non-magnetic design convince by magnetic neutrality and by a light and quiet running.

                                                      Franke FDD linear guides are suitable for linear motion tasks in almost all industries. Non-magnetic tracks without influencing the prevailing magnetic fields make them ideal components e.g. in medical technology or in electronics manufacturing. Rail elements can be manufactured in lengths from 200 mm to 4000 mm and can be coupled endlessly.

                                                      • Stroke length: One piece from 200 mm to 4000 mm, endlessly connectable
                                                      • Material:
                                                        Cassette plate, roller shoes,
                                                        Rail body: aluminum, anodized
                                                        Raceways: non-magnetic steel
                                                        Rollers: non-magnetic bearing steel
                                                      • Operating temperature: −20 °C to +80 °C
                                                      • Maximum speed: 1 m/s
                                                      • Mounting position: Any
                                                      • Lubrication: Lifetime-lubricated, maintenance-free
                                                    • Linear Guides Pair of single rails Lubricant free Type FDE-R

                                                    • Aluminum roller guides of type FDE are equipped with lubricant-free and needle-bearing rollers.

                                                      Franke FDE linear guides are equipped with lubricant-free, high-quality needle bearings and are made almost entirely of lightweight aluminum. They are suitable for linear motion tasks in almost all industries, especially for use in food production or in clean rooms. Rail elements can be manufactured in lengths from 200 mm to 4000 mm and can be coupled endlessly.

                                                      • Stroke lengt: One piece from 200 mm to 4000 mm, endlessly connectable
                                                      • Material:
                                                        Cassette plate, roller shoes,
                                                        Rail body: aluminum, anodized
                                                        Raceways: spring steel
                                                        Rollers: bearing steel
                                                      • Operating temperature: −20 °C to +80 °C
                                                      • Maximum speed: 1 m/s
                                                      • Mounting position: Any
                                                      • Lubrication: Lubricant free, maintenance free
                                                    • Linear Guides Pair of single rails Non-corrosive Low-cost Type FDG-R

                                                    • Aluminum roller guides of type FDG are equipped with stainless steel raceways and ball bearings. They offer insensitivity to environmental influences at an affordable price.

                                                      Franke FDG linear guides are suitable for linear motion tasks in almost all industries. They are particularly convincing in cost-sensitive applications in harsh environments and with reduced demands on load capacity. Rail elements can be manufactured in lengths from 200 mm to 4000 mm and can be coupled endlessly.

                                                      • Stroke length: One piece from 200 mm to 4000 mm, endlessly connectable
                                                      • Material:
                                                        Cassette plate, roller shoes,
                                                        Rail body: aluminum, anodized
                                                        Raceways: NIRO steel
                                                        Rollers: NIRO steel
                                                      • Operating temperature: −10 °C to +80 °C
                                                      • Maximum speed: 10 m/s
                                                      • Mounting position: Any
                                                      • Lubrication: Lifetime-lubricated, maintenance-free
                                                    • Linear Guides Pair of single rails Highly dynamic Type FDH-R

                                                    • Aluminum roller guides of type FDH convince with their particularly quick response and smooth running even at high acceleration.

                                                      Franke FDH linear guides are suitable for linear movement tasks, especially in dynamic pick-&-place applications. They have rollers with angular contact ball bearings for the highest acceleration and speed values, for example when using linear motors as the drive source. Rail elements can be manufactured in lengths from 200 mm to 4000 mm and can be coupled endlessly.

                                                      • Stroke length: One piece from 200 mm to 4000 mm, endlessly connectable
                                                      • Material;
                                                        Cassette plate, roller shoes,
                                                        Rail body: aluminum, anodized
                                                        Raceways: spring steel
                                                        Rollers: steel
                                                      • Operating temperature: −10 °C to +80 °C
                                                      • Maximum speed: 10 m/s
                                                      • Mounting position: Any
                                                      • Lubrication: Lifetime-lubricated, maintenance-free
                                                    • Linear Guides Pair of single rails Vacuum suitable Type FDI-R

                                                    • Aluminum roller guides of type FDI are special guides for use in vacuum. The full needled bearings are equipped with vacuum-compatible lubricant.

                                                      Franke FDI linear guides are equipped with vacuum-compatible needle bearings and are made almost entirely of lightweight aluminum. Special design, material and lubricants prevent outgassing in a vacuum. Rail elements can be manufactured in lengths from 200 mm to 4000 mm and can be coupled endlessly.

                                                      • Stroke length: One piece from 200 mm to 4000 mm, endlessly connectable
                                                      • Material:
                                                        Cassette plate, roller shoes,
                                                        Rail body: aluminum
                                                        Raceways: spring steel
                                                        Rollers: non-corrosive bearing steel, full needled
                                                      • Operating temperature: −20 °C to +80 °C
                                                      • Maximum speed: 1 m/s
                                                      • Mounting position: Any
                                                      • Lubrication: Lifetime-lubricated, maintenance-free
                                                  • Linear Tables

                                                          • Linear table Type FTB

                                                          • Franke FTB linear tables are light, compact, ready-to-install positioning units.

                                                            Franke FTB linear tables impress with their compact and robust design. The integrated aluminum roller guide is maintenance-free and protected from dirt by a metal cover. It is driven by a spindle. Franke FTB linear tables are suitable for precise processes in many measuring, testing and positioning applications. They are available in stroke lengths from 100 to 1500mm.

                                                            • Stroke length: 100 - 1500 mm
                                                            • Material:
                                                              Base plate and guide system: aluminum, anodized
                                                              Cover: sheet steel
                                                              Spindle: steel
                                                            • Operating temperature: −10 °C to +80 °C
                                                            • Maximum speed: 15 m/s
                                                            • Mounting position: Any
                                                            • Lubrication: Lifetime-lubricated, maintenance-free
                                                      • Linear Modules

                                                            • Linear module with external guides Type FTC

                                                            • Franke linear modules type FTC are available with a precise spindle drive or with a highly dynamic toothed belt drive.

                                                              Franke FTC linear modules are light, compact and ready-to-install positioning units. The external guide system is moved by an internal spindle or toothed belt drive. Franke FTC linear modules are very versaStroke lengt

                                                              • Stroke length: ne piece from 100 mm to 3400 mm
                                                              • Material:
                                                                Housing, rail body: aluminum anodized
                                                                Raceways: spring steel
                                                                Rollers: steel
                                                              • Operating temperature: −10 °C to +80 °C
                                                              • Maximum speed: 5 m/s
                                                              • Mounting position: Any
                                                              • Lubrication: Lifetime-lubricated, maintenance-free
                                                            • Linear module with integrated guides type FTD

                                                            • Franke linear modules FTD are extremely compact and dynamic.

                                                              Franke linear modules type FTD are light, compact and ready-to-install positioning units. They are extremely compact and combine the guide system and toothed belt drive within the housing. Franke FTD linear modules can be used universally. They are suitable for long stroke lengths of up to 7 meters.

                                                              • Stroke length: One piece from 100 mm to 7000 mm
                                                              • Material:
                                                                Housing, rail body: aluminum anodized
                                                                Raceways: spring steel
                                                                Rollers: steel
                                                              • Operating temperature: −10 °C to +80 °C
                                                              • Maximum speed: 10 m/s
                                                              • Mounting position: any
                                                              • Lubrication: lifetime-lubricated, maintenance-free
                                                          • Linear Systems Applications

                                                            • Leading along the entire line

                                                              Franke Linear Systems are used across a broad variety of different industries – among them the food and packaging sectors. In many cases, their smooth and quiet running is essential to achieve trouble-free operation.

                                                                • Camera sliders

                                                                • Requirements

                                                                  Numerous so-called slider systems are available on the market to move video cameras. The system by the firm SlideShot from Great Britain is a recent addition, which uses Franke linear guides. These systems have the following requirements: smooth and quiet operation, homogeneous movement and low weight.

                                                                  Solution

                                                                  Franke Linear Systems in a special design with accessories for photographers.
                                                                  Available from www.slideshot.co.uk

                                                                  Advantages

                                                                  Lightweight aluminium design for low carrying weight, large-scale rollers for smooth and quiet running and a broad range of accessories to adapt in a variety of shooting situations.

                                                                • Water jet cutter

                                                                • Requirements

                                                                  Cutting with a water jet calls for exact and rapid movements of the cutting head above the work piece to create even and smooth edges and to travel along even more complex geometries.

                                                                  Solution

                                                                  Franke linear motor module FTH Drive with integrated direct drive.

                                                                  Advantages

                                                                  Lightweight aluminium design for low weight and dynamic movement. The linear motor is integrated in the rail profile. This makes the module extremely flat and ensures it requires very little mounting space. The aluminium body and the non-corrosive running bars make the system insensitive to moisture.

                                                                • Food packaging

                                                                • Requirements

                                                                  The packaging machine works at high speeds. The linear guides used here must be resistant to aggressive media (e.g. salt, sugar, spray water). The machine has stroke lengths of 1500mm to 2100mm. The average mileage of the packaging machine is 30,000km per year.

                                                                  Solution

                                                                  The aluminium roller guides in series FDA20.

                                                                  Advantages

                                                                  The aluminium roller guides FDA enable speeds of up to 10m/s. The stroke lengths are infinitely variable. Central lubrication on the cassette achieves a high service life and substantial mileage. Grease nipples fitted to the front allow for convenient lubricant replenishment while the guides are fitted.

                                                                • Cheese production

                                                                • Requirements

                                                                  A linear guide is to be used to hold a cheese wheel in place for the subsequent cutting process. The guides must satisfy the hygienic requirements for use in the food industry. There must be no leakage of lubricant. The system has relatively weak motorization.

                                                                  Solution

                                                                  The aluminium roller guides in the system FDA25 with tracks from the series FDC25.

                                                                  Advantages

                                                                  The Franke aluminium roller guide operates cleanly and maintenance-free thanks to the food industry-compatible non-corrosive design. It comes with food industry lubrication. The guide can be set to the desired low slide resistance using a grub screw fitted to the side of the cassette. This is used to reduce the drive power applied to the guide.

                                                                • Mattress production

                                                                • Requirements

                                                                  Bonding points to bond the mattresses are positioned in the center of the gantry. The guides are used to travel to the gantry along the x and y axes. The assembly surfaces of the guides are not processed in order to save costs.

                                                                  Solution

                                                                  The aluminium roller guide FDA25 in a length of 2000mm.

                                                                  Advantages

                                                                  The guide unit, motorized by a toothed belt, travels at a speed of 50m/min. The guide is fitted directly to the unprocessed aluminium substructure. This involves mounting aluminium on aluminium, which means there is no bi-metal effect in the event of temperature fluctuations. This cost efficient solution makes the system competitive. Customers achieve maximum drive culture using the aluminium roller guide. The system preload is infinitely variable to suit the requirements.

                                                                • Packaging machine

                                                                • Requirements

                                                                  Machine units in a packaging machine need to travel quickly and safely. High clock rates necessitate dynamic movement patterns. Two units are moved on one module.

                                                                  Solution

                                                                  Franke linear motor module FTH Drive with two motors.

                                                                   

                                                                  Advantages

                                                                  Franke linear motor modules in type FTH Drive come with linear motors fitted to the guide rails. This engineering reduces the mounting space and enables compact designs. The module bodies are made of aluminium and harmonize perfectly with the aluminium profiles used to assemble the machine. Two motors, controlled separately, ensure highly dynamic movement.

                                                                • Dental X-ray device

                                                                • Requirements

                                                                  The linear guide is used in the secondary panel of the dental X-ray device. The purpose of the panel is to enable exact X-ray imaging. Here it is important that the unit travels without any oscillation whatsoever. The linear guide must run easily and smoothly.

                                                                  Solution

                                                                  The Franke roller guide FDL12 is integrated directly in the customized carriage mount. A lateral grub screw is used to set the slide resistance and hence the stiffness of the entire system. This guarantees movement without any oscillation whatsoever.

                                                                  Advantages

                                                                  The guide FDZ12 runs evenly, quietly and cleanly. The elevated preload (0.6 to 0.8N) ensures that the secondary panel travels free from oscillation. The guide comes with lifetime lubrication. The sealed, single-row ball bearings mean that no lubricant can leak to the outside.