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Zero-Backlash Jaw Couplings for Motors

Ruland zero-backlash jaw couplings have high dampening capabilities and can accommodate all forms of misalignment, making them well suited for applications with high acceleration and deceleration curves that couple a motor with a screw driven actuator or gearbox. Ruland jaw couplings are made up of two aluminum hubs and an elastomeric insert called the spider. They give motor manufacturers and integrators a standard coupling with a high level of customization. Hubs can be easily interchanged between clamp and set screw, with or without keyway and spiders have three durometers to choose from. This flexibility allows designers to specify an outer diameter with a variety of inch and metric bore sizes will match joined components such as lead screws, ball screws, and gearboxes.

Ruland hubs are manufactured with a proprietary curved jaw profile that ensures zero-backlash operation for fine positioning. Designers can select from three different spider durometers, enabling them to balance dampening, torque, and torsional rigidity based on the needs of their application. The spider serves as an inexpensive wear element that restores the coupling’s performance characteristics when replaced, saving maintenance costs when compared to couplings that must be entirely replaced. In the event of failure, the hub tenons will interlock for continued power transmission to allow the system to be shut down safely.

Zero-backlash jaw couplings are manufactured by Ruland with bores sizes ranging 1/8” to 1-1/4” and 3mm to 32mm.

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  1. Ruland JC32-10-A, Jaw Coupling Hub
    JC32-10-A
    As low as $55.62 $81.58
    Ruland JC32-10-A, 5/8" Jaw Coupling Hub, Aluminum, Clamp Style, 2.000" OD, 0.820" Length
  2. Ruland JC32-12-A, Jaw Coupling Hub
    JC32-12-A
    As low as $55.62 $81.58
    Ruland JC32-12-A, 3/4" Jaw Coupling Hub, Aluminum, Clamp Style, 2.000" OD, 0.820" Length
  3. Ruland JC32-14-A, Jaw Coupling Hub
    JC32-14-A
    As low as $55.62 $81.58
    Ruland JC32-14-A, 7/8" Jaw Coupling Hub, Aluminum, Clamp Style, 2.000" OD, 0.820" Length
  4. Ruland JC32-16-A, Jaw Coupling Hub
    JC32-16-A
    As low as $55.62 $81.58
    Ruland JC32-16-A, 1" Jaw Coupling Hub, Aluminum, Clamp Style, 2.000" OD, 0.820" Length
  5. Ruland JC32-8-A, Jaw Coupling Hub
    JC32-8-A
    As low as $55.62 $81.58
    Ruland JC32-8-A, 1/2" Jaw Coupling Hub, Aluminum, Clamp Style, 2.000" OD, 0.820" Length
  6. Ruland JCC32-10-A, Jaw Coupling Hub
    JCC32-10-A
    As low as $66.08 $96.91
    Ruland JCC32-10-A, 5/8" Jaw Coupling Hub, Aluminum, Clamp Style With Keyway, 2.000" OD, 0.820" Length
  7. Ruland JCC32-12-A, Jaw Coupling Hub
    JCC32-12-A
    As low as $66.08 $96.91
    Ruland JCC32-12-A, 3/4" Jaw Coupling Hub, Aluminum, Clamp Style With Keyway, 2.000" OD, 0.820" Length
  8. Ruland JCC32-14-A, Jaw Coupling Hub
    JCC32-14-A
    As low as $66.08 $96.91
    Ruland JCC32-14-A, 7/8" Jaw Coupling Hub, Aluminum, Clamp Style With Keyway, 2.000" OD, 0.820" Length
  9. Ruland JCC32-16-A, Jaw Coupling Hub
    JCC32-16-A
    As low as $66.08 $96.91
    Ruland JCC32-16-A, 1" Jaw Coupling Hub, Aluminum, Clamp Style With Keyway, 2.000" OD, 0.820" Length
  10. Ruland JCC32-8-A, Jaw Coupling Hub
    JCC32-8-A
    As low as $66.08 $96.91
    Ruland JCC32-8-A, 1/2" Jaw Coupling Hub, Aluminum, Clamp Style With Keyway, 2.000" OD, 0.820" Length
  11. JD32/51-92Y
    JD32/51-92Y
    As low as $28.07 $41.17
    Ruland JD32/51-92Y, Jaw Coupling Spider, 92 Shore A Yellow, 2.000" (50.8mm) OD, Balance of Torque and Dampening
  12. Ruland JD32/51-98R, Jaw Coupling Spider
    JD32/51-98R
    As low as $26.64 $39.07
    Ruland JD32/51-98R, Jaw Coupling Spider, 98 Shore A Red, 2.000" (50.8mm) OD, High Torque
  13. Ruland JS32-10-A, Jaw Coupling Hub
    JS32-10-A
    As low as $48.06 $70.48
    Ruland JS32-10-A, 5/8" Jaw Coupling Hub, Aluminum, Set Screw Style, 2.000" OD, 0.820" Length
  14. Ruland JS32-12-A, Jaw Coupling Hub
    JS32-12-A
    As low as $48.06 $70.48
    Ruland JS32-12-A, 3/4" Jaw Coupling Hub, Aluminum, Set Screw Style, 2.000" OD, 0.820" Length
  15. Ruland JS32-14-A, Jaw Coupling Hub
    JS32-14-A
    As low as $48.06 $70.48
    Ruland JS32-14-A, 7/8" Jaw Coupling Hub, Aluminum, Set Screw Style, 2.000" OD, 0.820" Length
  16. Ruland JS32-16-A, Jaw Coupling Hub
    JS32-16-A
    As low as $48.06 $70.48
    Ruland JS32-16-A, 1" Jaw Coupling Hub, Aluminum, Set Screw Style, 2.000" OD, 0.820" Length
  17. Ruland JS32-8-A, Jaw Coupling Hub
    JS32-8-A
    As low as $48.06 $70.48
    Ruland JS32-8-A, 1/2" Jaw Coupling Hub, Aluminum, Set Screw Style, 2.000" OD, 0.820" Length
  18. Ruland JSC32-10-A, Jaw Coupling Hub
    JSC32-10-A
    As low as $58.50 $85.81
    Ruland JSC32-10-A, 5/8" Jaw Coupling Hub, Aluminum, Set Screw Style With Keyway, 2.000" OD, 0.820" Length
  19. Ruland JSC32-12-A, Jaw Coupling Hub
    JSC32-12-A
    As low as $58.50 $85.81
    Ruland JSC32-12-A, 3/4" Jaw Coupling Hub, Aluminum, Set Screw Style With Keyway, 2.000" OD, 0.820" Length
  20. Ruland JSC32-14-A, Jaw Coupling Hub
    JSC32-14-A
    As low as $58.50 $85.81
    Ruland JSC32-14-A, 7/8" Jaw Coupling Hub, Aluminum, Set Screw Style With Keyway, 2.000" OD, 0.820" Length
  21. Ruland JSC32-16-A, Jaw Coupling Hub
    JSC32-16-A
    As low as $58.50 $85.81
    Ruland JSC32-16-A, 1" Jaw Coupling Hub, Aluminum, Set Screw Style With Keyway, 2.000" OD, 0.820" Length
  22. Ruland JSC32-8-A, Jaw Coupling Hub
    JSC32-8-A
    As low as $58.50 $85.81
    Ruland JSC32-8-A, 1/2" Jaw Coupling Hub, Aluminum, Set Screw Style With Keyway, 2.000" OD, 0.820" Length
  23. Ruland MJC51-12-A, Jaw Coupling Hub
    MJC51-12-A
    As low as $55.62 $81.58
    Ruland MJC51-12-A, 12mm Jaw Coupling Hub, Aluminum, Clamp Style, 50.8mm OD, 20.8mm Length
  24. Ruland MJC51-13-A, Jaw Coupling Hub
    MJC51-13-A
    As low as $55.62 $81.58
    Ruland MJC51-13-A, 13mm Jaw Coupling Hub, Aluminum, Clamp Style, 50.8mm OD, 20.8mm Length
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