Due to Microsoft's discontinuation of updates, including security, certain functionality such as checkout and CAD may not work for you. We recommend using Google Chrome, Microsoft Edge, Firefox, or Safari to ensure full functionality.
Thank you - the Ruland team

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.

Products

View as Grid Table

Items 313-336 of 354

Set Descending Direction
  1. Ruland MJSC33-12-A, Jaw Coupling Hub
    MJSC33-12-A
    As low as $31.10 $45.61
    Ruland MJSC33-12-A, 12mm Jaw Coupling Hub, Aluminum, Set Screw Style With Keyway, 33.3mm OD, 15.0mm Length
  2. Ruland MJSC33-13-A, Jaw Coupling Hub
    MJSC33-13-A
    As low as $31.10 $45.61
    Ruland MJSC33-13-A, 13mm Jaw Coupling Hub, Aluminum, Set Screw Style With Keyway, 33.3mm OD, 15.0mm Length
  3. Ruland MJSC33-14-A, Jaw Coupling Hub
    MJSC33-14-A
    As low as $31.10 $45.61
    Ruland MJSC33-14-A, 14mm Jaw Coupling Hub, Aluminum, Set Screw Style With Keyway, 33.3mm OD, 15.0mm Length
  4. Ruland MJSC33-15-A, Jaw Coupling Hub
    MJSC33-15-A
    As low as $31.10 $45.61
    Ruland MJSC33-15-A, 15mm Jaw Coupling Hub, Aluminum, Set Screw Style With Keyway, 33.3mm OD, 15.0mm Length
  5. Ruland MJSC33-16-A, Jaw Coupling Hub
    MJSC33-16-A
    As low as $31.10 $45.61
    Ruland MJSC33-16-A, 16mm Jaw Coupling Hub, Aluminum, Set Screw Style With Keyway, 33.3mm OD, 15.0mm Length
  6. Ruland MJSC33-8-A, Jaw Coupling Hub
    MJSC33-8-A
    As low as $31.10 $45.61
    Ruland MJSC33-8-A, 8mm Jaw Coupling Hub, Aluminum, Set Screw Style With Keyway, 33.3mm OD, 15.0mm Length
  7. Ruland MJSC33-9-A, Jaw Coupling Hub
    MJSC33-9-A
    As low as $31.10 $45.61
    Ruland MJSC33-9-A, 9mm Jaw Coupling Hub, Aluminum, Set Screw Style With Keyway, 33.3mm OD, 15.0mm Length
  8. Ruland MJSC41-10-A, Jaw Coupling Hub
    MJSC41-10-A
    As low as $37.21 $54.58
    Ruland MJSC41-10-A, 10mm Jaw Coupling Hub, Aluminum, Set Screw Style With Keyway, 41.3mm OD, 18.0mm Length
  9. Ruland MJSC41-11-A, Jaw Coupling Hub
    MJSC41-11-A
    As low as $37.21 $54.58
    Ruland MJSC41-11-A, 11mm Jaw Coupling Hub, Aluminum, Set Screw Style With Keyway, 41.3mm OD, 18.0mm Length
  10. Ruland MJSC41-12-A, Jaw Coupling Hub
    MJSC41-12-A
    As low as $37.21 $54.58
    Ruland MJSC41-12-A, 12mm Jaw Coupling Hub, Aluminum, Set Screw Style With Keyway, 41.3mm OD, 18.0mm Length
  11. Ruland MJSC41-13-A, Jaw Coupling Hub
    MJSC41-13-A
    As low as $37.21 $54.58
    Ruland MJSC41-13-A, 13mm Jaw Coupling Hub, Aluminum, Set Screw Style With Keyway, 41.3mm OD, 18.0mm Length
  12. Ruland MJSC41-14-A, Jaw Coupling Hub
    MJSC41-14-A
    As low as $37.21 $54.58
    Ruland MJSC41-14-A, 14mm Jaw Coupling Hub, Aluminum, Set Screw Style With Keyway, 41.3mm OD, 18.0mm Length
  13. Ruland MJSC41-15-A, Jaw Coupling Hub
    MJSC41-15-A
    As low as $37.21 $54.58
    Ruland MJSC41-15-A, 15mm Jaw Coupling Hub, Aluminum, Set Screw Style With Keyway, 41.3mm OD, 18.0mm Length
  14. Ruland MJSC41-16-A, Jaw Coupling Hub
    MJSC41-16-A
    As low as $37.21 $54.58
    Ruland MJSC41-16-A, 16mm Jaw Coupling Hub, Aluminum, Set Screw Style With Keyway, 41.3mm OD, 18.0mm Length
  15. Ruland MJSC41-17-A, Jaw Coupling Hub
    MJSC41-17-A
    As low as $37.21 $54.58
    Ruland MJSC41-17-A, 17mm Jaw Coupling Hub, Aluminum, Set Screw Style With Keyway, 41.3mm OD, 18.0mm Length
  16. Ruland MJSC41-18-A, Jaw Coupling Hub
    MJSC41-18-A
    As low as $37.21 $54.58
    Ruland MJSC41-18-A, 18mm Jaw Coupling Hub, Aluminum, Set Screw Style With Keyway, 41.3mm OD, 18.0mm Length
  17. Ruland MJSC41-19-A, Jaw Coupling Hub
    MJSC41-19-A
    As low as $37.21 $54.58
    Ruland MJSC41-19-A, 19mm Jaw Coupling Hub, Aluminum, Set Screw Style With Keyway, 41.3mm OD, 18.0mm Length
  18. Ruland MJSC41-20-A, Jaw Coupling Hub
    MJSC41-20-A
    As low as $37.21 $54.58
    Ruland MJSC41-20-A, 20mm Jaw Coupling Hub, Aluminum, Set Screw Style With Keyway, 41.3mm OD, 18.0mm Length
  19. Ruland MJSC51-12-A, Jaw Coupling Hub
    MJSC51-12-A
    As low as $59.67 $87.52
    Ruland MJSC51-12-A, 12mm Jaw Coupling Hub, Aluminum, Set Screw Style With Keyway, 50.8mm OD, 20.8mm Length
  20. Ruland MJSC51-13-A, Jaw Coupling Hub
    MJSC51-13-A
    As low as $59.67 $87.52
    Ruland MJSC51-13-A, 13mm Jaw Coupling Hub, Aluminum, Set Screw Style With Keyway, 50.8mm OD, 20.8mm Length
  21. Ruland MJSC51-14-A, Jaw Coupling Hub
    MJSC51-14-A
    As low as $59.67 $87.52
    Ruland MJSC51-14-A, 14mm Jaw Coupling Hub, Aluminum, Set Screw Style With Keyway, 50.8mm OD, 20.8mm Length
  22. Ruland MJSC51-15-A, Jaw Coupling Hub
    MJSC51-15-A
    As low as $59.67 $87.52
    Ruland MJSC51-15-A, 15mm Jaw Coupling Hub, Aluminum, Set Screw Style With Keyway, 50.8mm OD, 20.8mm Length
  23. Ruland MJSC51-16-A, Jaw Coupling Hub
    MJSC51-16-A
    As low as $59.67 $87.52
    Ruland MJSC51-16-A, 16mm Jaw Coupling Hub, Aluminum, Set Screw Style With Keyway, 50.8mm OD, 20.8mm Length
  24. Ruland MJSC51-17-A, Jaw Coupling Hub
    MJSC51-17-A
    As low as $59.67 $87.52
    Ruland MJSC51-17-A, 17mm Jaw Coupling Hub, Aluminum, Set Screw Style With Keyway, 50.8mm OD, 20.8mm Length
per page
© 2025 Ruland Manufacturing Co., Inc. All rights reserved Top