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  • Offer Profile
  • Nabtesco Precision, a member of the Nabtesco Group, is the world's leading manufacturer of cycloidal precision gears. These high-reduction precision gears are used in drive technology whenever the highest demands are made for performance and efficiency. Today more than 3.5 million gears are currently in use. That means our company's products provide the movement in roughly 60 per cent of all industrial robots.

    Typical Applications of our Products are:
    • Welding Positioners
    • Antenna Systems
    • Robotics
    • Semiconductor Machinery
    • Rotary Tables
    • ATC Magazines
Product Portfolio
  • Cycloidal gears

  • Cycloidal gears offer unbeatable advantages The two-stage reduction of cycloidal gears makes solutions from Nabtesco Precision so successful. The reason is that the speed is reduced by the double cams. Vibration is reduced by the two-stage reduction principle and low inertia. The force is also distributed very evenly, thanks to the roller cam design, and this contributes to the minimum hysteresis loss and enormous resistance to shock loading. Consequently, cycloidal gears are as versatile as they are resilient.

    The drive or servomotor is connected to the spur gear stage of the gearbox via a pinion. The rotating speed reduces at this point relative to the reduction ratio between the pinion and planetary gear. The planetary gears are connected to crankshafts which drive the cams using needle bearings. These cams rotate inside the case which is lined with pins.

    High shock resistance in emergency stop situations

    The cam has exactly one eccentric section less than the pin ring has pins. A 360° revolution of the crankshafts therefore causes the cams to rotate one pin farther, whereby practically all the gear teeth are in continuous contact with the pins. The rotating movement is then transmitted from the input shaft to the crankshafts via the spur gear stage, and these then shift the cams in the pin ring and, consequently, generate a reduced speed with high precision. This technology enables the RV gears to absorb 5 times the rated torque in emergency-stop situations without suffering any damage. The resulting overall reduction is the same as the product of the two reduction ratios (spur gear stage and eccentric stage).

    ADVANTAGES
    • High rated torque of up to 14,715 Nm
    • Minimum space required
    • High shock load (5 times the rated torque)
    • High rigidity
    • Extreme precision (hysteresis loss < 1 arcmin)
    • Low inertia
    • Insensitive to vibrations
    • Extremely low wear
    • Long service life

     

     

      • Ready to install for fast integration

      • Nabtesco gearheads are completely sealed gear units. They are filled with grease, encapsulated and ready for installation. To reduce the design and assembly costs, we integrate the motor adapter plate and the motor shaft coupling for servo motors in the gearheads. The gearheads are based on our different component sets – with a hollow shaft or solid shaft – and their design features bring numerous advantages.

        Easy assembly

        All gearheads form a completely sealed component. The basic features include an adapter plate for the motor and a motor shaft coupling for servo motors. This ensures fast and inexpensive installation of the gears. The large, integrated angular ball bearings in the gears absorb high forces and moments. This eliminates the need for additional bearings and minimizes design and assembly times. The result: lower overall costs!

          • Precision gears from Nabtesco

          • With or without a hollow shaft, in hygienic, compact or high-performance versions: We offer high-precision cycloidal gears in numerous different versions, and also as application-specific solutions.
              • Gearhead Hollowshaft RD_-C

              • These gearheads feature a large hollow shaft for the feed-through of cables and supply lines. The hollow shaft rotates at the output speed. This series is available for right-angle (RDR-C) or straight (RDS-C) installation, as well as for installation with a pulley input (RDP-C).

                Hollow shaft gearhead
                T: 98 – 3.136 Nm
                i: 81 – 258

              • Gearhead Hollowshaft RS

              • We designed the RS gears especially for the reliable and precise positioning of heavy loads of up to 9 tons. The cast iron base ensures stable and durable floor mounting. Their high performance and precision make them superior to conventional worm gears and camshaft gears.

                Hollow shaft gearhead
                Integrated rectangular gear
                T: 2.548 – 8.820 Nm
                i: 120 – 240

              • Gearhead Solid RH-N

              • The solid shaft gearheads of our new RH-N series are based on the RV-N component sets. They feature an integrated input gear and a motor flange for all standard motor types. This makes them ideal for use in machine tools, in modern rotary tables and in different handling applications. The gears are manufactured locally and adapted for individual applications as required.

                Solid shaft gearhead
                T: 245 – 7.000 Nm
                i: 41 – 203,52

              • Gearhead Solid RD_-E

              • We designed these gearheads to be especially lightweight and compact. They can be operated with a right-angle (RDR-E) or straight (RDS-E) pre-stage or alternatively by means of a pulley input type (RDP-E).

                Solid shaft gearhead
                T: 58 – 3.136 Nm
                i: 31 – 185

              • Gearhead Solid RA-EA/ EC

              • The solid shaft gears of the RA-EA/EC series are based on the RV-E component sets and are optimized for the precise positioning of chain or disk magazines.

                Solid shaft gearhead
                For magazines and change systems
                T: 167 – 1.568 Nm
                i: 80 – 171

              • Gearhead Solid GH

              • These reduction gearheads (based on the RV gear sets) are designed for high output speeds and are therefore ideal for the automation of robot axes, machine tools and conveyor systems.

                Hollow shaft gearhead
                High output speed
                T: 69 – 980 Nm
                i: 10,74 – 31,43
                n: bis 270 min-1

            • Component Sets

            • Precise, reliable and powerful

              Nabtesco component sets stand for maximum precision, extremely low vibrations and low inertia. Our ingenious two-stage cycloidal design makes the gears insensitive to shock loads and allows high torques. The force transmission via rollers guaranteed high efficiency ratio of up to 85 percent and a long service life. The component sets of the RV-C and RV-N series also feature integrated angular ball bearings. Hence, there is no need for the customer to provide bearings, as well as the manufacturing costs for the bearing mounts.

                • Component sets RV-C

                • The RV-C series features a hollow shaft with a diameter of up to 138 mm. This allows the feed-through of data cables and supply lines.

                  Hollow shaft component set
                  T: 98 – 11.760 Nm

                • Component sets RV-N

                • We developed the RV-N series as a very compact, lightweight and high-performance solid shaft gear. These gears are used in applications with limited space that require high torque performance.

                  Solid shaft component set
                  T: 245 – 7.000 Nm 
                  i: 41 – 203,52

                • Component sets RV

                • The RV series represents the “basis” of our entire product line. These are component sets without integrated angular ball bearings, which makes them especially compact. The gear sets can be combined with different external output bearings.

                  Solid shaft component set
                  Without output bearing
                  T: 137 – 5.390 Nm
                  i: 57 – 192,4

                • Component sets RF-P

                • The RF-P series is a completely new development! Due to their high output speed, these component sets are ideal for highly dynamic pick & place, handling and positioning applications. They are used especially in arm axes of Delta and SCARA robots or in the wheel drives of driverless transport systems.

                  Solid shaft component set
                  High output speed
                  T: 190 – 320 Nm 
                  i: 31 – 56 
                  n: bis 200 min-1

              • Lubricants

                    • Lubricants for your gears

                    • When our gearheads leave the factory, they are ready for installation. That means they are already filled with lubricants. Gears produced before 2008 contain Molywhite grease RE 00. Gears manufactured after 2008 are filled with Vigogrease RE 0. Both lubricants guarantee the high performance of our gears and a long life. However, Vigogrease better fulfils the stringent requirements for environmental compatibility and health protection.
                • Customised solutions

                • Precisely what you need, in the shortest of time frames

                  From the beginning we have developed and produced custom products for the individual requirements of our clients. Today, we are going even one step further with customising.

                  Whether it is a drive train or a cover, a motor flange or an input gear:
                  there are many details which one can adapt in order to match our gears exactly to your application. With a team of experienced development engineers and our service team in Düsseldorf we can implement all these requirements quickly and professionally.

                    • Applications

                    • Cycloidal gears from Nabtesco are used in diverse industries

                      A look at the diverse applications in which Nabtesco gears are used shows that they cut a good figure – and not only on paper. Whether in robotics or packaging technology, wind power installations or machine tools, antenna construction or medical technology: Our precision gears are used in applications that require exact positioning and absolute reliability.

                        • Antenna construction

                        • Hollow shaft gears for antenna systems

                          The alignment of large parabolic antennas, such as those used for communication with near-Earth satellites, requires high positioning accuracy. This applies both to the azimuth (the angle between the meridian and vertical plane of a celestial body) and the angle of elevation. The control of these antennas, which have dish diameters of up to 17 metres, requires high torsional and moment rigidity in addition to high reduction ratios. Nabtesco’s compact RV-C hollow shaft gear sets are ideal for this application.

                        • Robotics

                        • Nabtesco gears make your robot more precise and more efficient
                          • Extremely dynamic
                            The cycloidal construction of Nabtesco gears ensures high speeds and fast acceleration in pick & place applications
                          • Absolutely precise
                            Precision gears from Nabtesco give your welding robot the necessary “sensitivity” for exact processing
                          • Exceptionally long life
                            Our low-wear gear solutions ensure a long life and smooth operation throughout the entire period of use
                          • Compact design
                            Our engineers design Nabtesco gears to be very compact for easy integration in applications with limited space
                        • Welding

                        • Cycloidal gears for welding with millimeter accuracy

                          Robotic welding systems have to operate with high speed and absolute precision. Positioners and rotary tables provide for exact alignment of the workpieces. In welding positioners, a precision gear drives the horizontal rotary axis. This makes it possible to weld all spots along this axis – even complex geometrical structures – within a tolerance of tenths of millimetres, without having to reclamp the workpiece. The weld puddle must be kept exactly in the tray. Nabtesco cycloidal gears are designed for such applications.

                        • Handling

                        • Precision gears for positioning robots

                          An important focus at Nabtesco is on the development of special gears for high-speed handling and robot-assisted positioning. Robots for pick & place applications and for workpiece positioning operate in industrial environments at ever increasing speeds, which also puts a strain on the gears installed in such systems. In addition to the high acceleration and braking forces of these machines, the engineers also have to be aware of heat generation from the high speeds. Our precision gears fulfil these requirements!

                        • Medical technology

                        • Drive technology with a high safety margin

                          Motorized drives provide for extreme precision in the handling of patients and in imaging processes such as X-ray, MRI or ultrasonic examinations. These applications require positioning accuracy within a tolerance of millimetres or even less. Since the machines are used for examining human patients, safety margins are extremely important in the case of a malfunction. Nabtesco cycloidal gears are the ideal choice!

                        • High precision

                        • Reliable and precise panel tracking

                          Many photovoltaic and solar thermal installations – especially central receiver power plants – adjust their panels to the position of the sun. In addition to high efficiency of the panels, constantly precise and reliable alignment is essential for a fast return on investment and long-term maintenance-free operation of the installation. Nabtesco cycloidal gears feature impressive precision, reliability and vibration-free operation.

                        • Machine tool building

                        • Cycloidal gears for micron-precise positioning

                          Precision is the top priority in the construction of machine tools. Because the blanks and tools must be positioned quickly and with micron precision. Complete machining in one clamping set-up prevents inaccuracies that can occur as a result of frequent reclamping of the workpiece. Compact precision gears with an integer gear ratio ensure the exact positioning of the chain or disk magazines equipped with the different tools required for this application.

                        • Packaging technology

                        • Precision gears for handling and palletising robots

                          Hygiene and safety are the top priorities in food production and packaging applications. Compliance with extremely stringent hygiene standards is required in the handling, positioning and packaging of foodstuffs. In addition, these applications are becoming more dynamic, faster and more precise. Our cycloidal gears of the RF-P and RH-N series easily fulfil these requirements.