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Antifriction Bearings
Our Antifriction Bearings
comprise four race rings, balls, a ball cage and, on request, an enclosed
construction.
Franke Antifriction Bearings are based on a patented principle: the four
race rings fit their raceway thanks to a specially developed grinding
procedure – exactly adjusted to the ball diameter. Therefore, the rolling
process does not occur directly between the rolling elements and enclosed
construction, but rather smoothly on the four open race rings.
This special construction principle produces an extremely compact bearing,
which also suits very small spaces. Another plus: the low friction and high
load capacity of our Antifriction Bearings reduce energy consumption.
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Bearing elements
Type
LEL - Ground Design
Type LED - Double Profile
Type LER - Square Profile
Type LEG - 2-Ring Bearing Element
Type LDD - Slim Bearing
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Bearing assemblies
Type
LDL - Steel Designs
Type LDL - Aluminium Design
Type LDL - Straight Gear
Type LDL - Toothed Belt Gear
Type LDV - Steel Design Preferred Series
Type LDH - Steel Design Angular Contact
Ball Bearing
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Rotary Tables
Type
LTA - Standard
Type LTB - High Accuracy
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Antifriction Bearings in Practice
After in-depth consultation and precise design and production,
Franke Antifriction Bearings provide movement in diverse
applications. For example, in computer tomography, processing
centres, textile machinery, machinery for chip production, indexing
tables or robots. Our Antifriction Bearings pass the practical test
day after day – you can rely on that.
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In Solar Industries: Tracking Systems
The best possible positioning to the sun is required for
photovoltaic modules or solar panels to obtain an optimum yield in solar
energy systems. Franke Antifriction Bearings in tracking systems
automatically align solar collector systems such that radiation from the sun
is collected in ideal fashion.
The Features:
• The 4-point system of Franke Antifriction Bearings makes for optimum
swivelling of solar collector systems along with a high degree of rigidity.
• Built directly into the surrounding structure, these bearings are
extremely space-saving.
• Good value for money tops off the benefits of this Franke product.
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In Medical Technology: Computer Tomography
The patented Franke FluesterlagerŽ as the main bearing in
computer tomography contributes to exact x-rays thanks to its design
tailor-made to the needs of medical technology.
The Features:
• Smooth and low-vibration running is even ensured at high rotary speeds
thanks to CNC-ground raceways.
• The elastomer profiles between the race rings and the race ring bed form
the basis for muted noise development and electrical insulation of the inner
and outer ring.
• The silent bearing impresses with rotary speeds of up to 300 revolutions
per minute.
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In Machinery: Machining Centres
In tool changers at machining centres, our bearing
assemblies help to ensure that different tools are fed quickly and precisely
into the machining head.
The Features:
• Due to the high centre freedom of the bearing assemblies, the drive system
can be installed to the inside.
• Labyrinth seals protect the raceways of the bearing
assemblies from chipping and coolants.
• The preload of the bearing guarantees high accuracy and even adjustment –
thus, nothing stands in the way of quiet running and maximum precision.
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In the Textile Industry: Circular Knitting Machines
Our bearing elements for circular knitting machines have
a decisive influence on the quality of the textiles due to their precision.
The Features:
• Even under severe thermal and mechanical loads, the bearing elements
enable exact radial and axial guiding of the needles.
• The rotary speeds are up to 60 revolutions per minute.
• The quality of the machines is determined amongst other things by the
quiet running of the bearing and the high surface quality of the raceways.
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In Clean Room Technology: Machinery for Chip Production
Wafer steppers are used for microchip production in
the clean room. The illumination optics form the heart of this machine. They
produce the filigree chip structures. A component of the optics: a Franke
Antifriction Bearing.
The Features:
• So that the illumination optics can work with extremely low tolerances,
the bearing has good radial and axial accuracy and high stiffness.
• Low-abrasion materials, special balls, a special ball cage and freedom
from lubricants meet the necessary requirements for the clean room.
• The final cleaning and packing of the bearing is effected for clean room
level 10000.
• Weight is saved by using aluminium.
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In Machinery: Indexing Tables
By using indexing tables, also called Rotary Tables,
tools are moved precisely. The constant and precise movement of these
indexing tables is based on our bearing elements amongst other things.
The Features:
• The bearing elements are precisely adjusted to the
different loads. Enormous loads can easily be borne from all directions.
• The Antifriction Bearings guarantee that the Rotary Table can move without
jerks or shocks, high repeat accuracy is included.
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In Automation: Robots
Our bearing elements are ideally suited for use in the
mobile axles of small robots.
The Features:
• The ingenious 4-point system from Franke facilitates high capacity from
all directions of movement.
• As the bearing element is integrated into the existing robot design, only
minimal installation space is needed.
• The high centre freedom of the bearing enables cables and supply pipes to
be fed through.
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In Research: Lamp Positioning
Facilities for lamp positioning in research are equipped
with our large Antifriction Bearings. The most important components of these
bearings: the outer gear and the pinion drive.
The Features:
• Aluminium components are the basis for the low weight of the bearing, the
high radial and axial accuracy guarantees exact positioning.
• The bearing is supplied complete: with driving pinion and planet angular
gear.
• The bearing‘s large centre freedom provides space for the robots used and
for feeding in supply lines.
• The bore shape is oriented to customer requirements.
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In the Aviation Industry: Turbine Testing
Franke Special Bearings of 700 to 1500 mm are used in
testing stations for turbines. They are used to position the conducting
segments and rotating blades. The bearings are integrated in precise housing
contours to record the complex measuring and testing sensors.
The Features:
• The bearings withstand temperatures up to 200 °C.
• High accuracy requirements for radial and axial running are fulfilled.
• The bearings can optionally be adjusted to all interface dimensions.
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Linear Systems
Aluminium Linear Systems from
Franke are used everywhere where speed and a light-weight construction are
needed.
Franke’s proven 4-point contact also comes to bear here: thanks to the
patented system of the guided roller, the rollers move perfectly on the
raceways. Franke Linear Systems comprise the following components: aluminium
guide rails, specially designed raceways, cassettes or roller shoe pairs
with rollers. Thanks to the modular design of our Linear Systems we can meet
the most individual of customer requirements. Different rail profiles and
roller shoes, special cassettes and variable track widths make an important
contribution.
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Franke Dynamic
Type FDA - Standard
Type FDB - Low Cost
Type FDC - Non-Corrosive
Type FDD - Non-Magnetic
Type FDE - Lubricant-Free
Type FDG - Non-Corrosive Low Cost
Type FDH - High Dynamic
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Franke Power
Type FPA - Standard
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Franke Robust
Type FRA - Standard
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Linear Tables / Modules
FTB - Standard
FTC - Standard
FTD - High Dynamic
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Linear Systems in Practice
The Franke principle of the guided roller
guarantees easy and silent running, even at
high speeds. These factors are essential for
smooth production in many industries.
Therefore, Franke Linear Systems are also
used in the most diverse industrial sectors
– for example in medical technology, the
food industry, for machine and plant
engineering or in the handling sector.
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In Medical Technology: Dental X-Ray Equipment
Precise x-rays need the movement of the light unit
to be completely vibration-free. Therefore, the
roller guide used must have smooth and silent
running. The Franke Dynamic Aluminium Roller Guide
fulfils this demand perfectly.
The Features:
• The Franke Dynamic Aluminium Roller Guide has
lifetime lubrication.
• Sealed rollers prevent the lubricant escaping.
• The guide’s running is silent, smooth and even.
• Preloading the cassette ensures vibration-free
movement of the secondary light.
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In Plant Engineering: Packaging Machines
The Franke Dynamic Aluminium Roller Guide is also
used on packaging machinery for mattresses. In
addition to cleanliness, the mobile function of the
guide unit must be ensured, to avoid soiling the
mattresses.
The Features:
• The Franke Dynamic Aluminium Roller Guide is
maintenance-free and requires no relubrication.
• No lubricant can escape from the encapsulated
rollers.
• The guide is available in a completely
lubricant-free
design on request.
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In the Food Industry: Cheese Production
In cheese production the food-safe Franke Dynamic
Aluminium Roller Guide provides the vertical
movement of a grappler for wheels of cheese. In this
application it is important that the roller guide is
insensitive to whey and aggressive cleaning agents.
• The guide is insensitive to moisture.
• Its running is easy and silent, the drive power is
low.
• No maintenance and lubrication for the whole
lifetime are guaranteed.
• An integrated wiper fulfils the specific hygiene
requirements for food production.
• The product is available in a lubricant-free
version
on request.
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In the Packing Industry: Packaging Machines
A bag forming, filling and sealing machine works at
high speeds. It has stroke lengths of 1500 to 2100
mm, the average service performance is 30000
kilometers a year. The Franke Dynamic Aluminium
Roller Guide used must be resistant to the
aggressive environmental conditions, such as salt,
sugar and splash water.
The Features:
• The Franke Dynamic Aluminium Roller Guide is in a
position to realise speeds up to 10 m/s.
• Several guides can be coupled for any length of
stroke desired.
• A good lifetime and service performance are
achieved through central lubrication of the
cassette.
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In the Handling Sector: Pick&Place Robots
Aluminium Roller Guides of type FDA 15 are used for
this handling unit. The linear motor is integrated
in a steel profile. The roller shoes are part of the
housing and guide the profile.
The Features:
• High accelerations up to 70 m/s˛ are possible.
• The Franke Dynamic Aluminium Roller Guide
guarantees precise repeat accuracies of +/–0.01 mm.
• Positioning of workpieces is quick and precise.
• The guide’s low space requirement facilitates the
compact design of the linear drive.
• No maintenance and cleanliness are guaranteed.
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In the Handling Sector: High Speed Camera Guiding
The Franke Dynamic Aluminium Roller Guide moves the
high speed camera for a film printing machine. A
results check is performed during the printing
process by camera or video. As films of different
widths are printed, the camera must be easy to
position.
The Features:
• The Franke Dynamic Aluminium Roller Guide has
smooth, even running.
• It weighs very little as the body material of the
rail is
aluminium.
• Special borings guarantee connection to the path
measuring system.
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In Machinery: Ring and Drum Coilers
The Franke Power Aluminium Recirculating Roller
Guide is used for machines that process and pack
coiled goods. It ensures that cables, hoses or steel
ropes are coiled on rings or empty spools, measured
to length and cut.
The Features:
•
The Franke Power Aluminium Roller Guide has high
load-capacity and stiffness.
• The cassettes are completely sealed and are also
suitable for harsh conditions.
• Integrated metal wipers keep the raceways clean.
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In Machinery: Handling System
Different processing centres are coupled together in
this machine through large portals. Workpieces are
processed with high acceleration. The Franke Robust
Aluminium Recirculating Ball Guide is used in the
transfer line. The recirculating ball system of type
FRA10 and FRA13 harmonises perfectly with the
substructure of aluminium profiles.
The Features:
• Transfer speeds of up to 3 m/s and accelerations
of up to 30 m/s˛ are achieved.
• The Franke Robust Aluminium Recirculating Ball
Guides used have a high lifetime, even in harsh and
very dirty conditions.
• Tolerances and unevenness in the substructure can
be equalised to a certain extent.
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