These are very high quality servo backlash couplings. They can take up very high torque and have zero backlash. We use them for NEMA34 stepper motors and for all servo motors. These are clamp type couplings. It is possible to make combinations of different shaft sizes. So for example if your steppermotor has a shaft of 14mm and your ballscrew has a size of 8mm, order one hub of 14mm and one hub of 8mm. Of course for each 2 hubs you need one spider.

Component features:

• A complete coupler consists of 2 HUBS and 1 Spider, any combination of bores can be made. In the "Compatible HUBS" tab, you can see which HUBS and spiders are compatible with this coupling. This allows you to create a complete coupling.
• 40mm diameter length 65mm (total assembly)
• Several size bores from stock, or a custom bore made on the CNC lathe
• Inside BORE diameter range 8-25mm H7 tolerance
• Compensate for axial, radial and angular misalignment
• Ease of maintenance due to changing insert only -- cost effective
• Rated Torque 17Nm (Tkn)
• Max Torque 34Nm (Tkmax)
• Included clamping screw size: m5x16 DIN912
• Tightening torque of the clamping screw 8Nm
• Moment of Inertia per HUB (10-3 kgm2) 0,015
• Weight: 95 gram per HUB
• Maximum allowed RPM: 5000. ShaftCouplers are not balanced!
• WARNING: With this ShaftCoupler, the shaft cannot extend through the centre of the ShaftCoupler. The Spider (1787) does not allow it. This is only possible up to 18mm BORE diameter.