Skip navigation
Machine Design

Safety coupling

Torque overload protection is often overlooked in machine design until something jams, resulting in damage or downtime. A SK1 safety coupling that prevents such complications uses a ball-detent system that is backlash-free and will disengage within 1 to 3 msec when an overload is detected. It can be integrated into timing pulleys, sheaves, and sprocket wheels for a torque range of 0.1 to 1,500 N-m. The coupling is shaft mounted using a clamping hub, taper conical sleeve, or a pure keyway connection, for shaft sizes from 4 to 70 mm. Four versions are available including single position, multiposition, load holding, and free wheeling. They are factory preset to a specific disengagement torque, but can be adjusted following installation.

R+W America L.P., 1120 Tower Lane, Bensenville, IL 60106, (630) 521-9911.

Hide comments


  • Allowed HTML tags: <em> <strong> <blockquote> <br> <p>

Plain text

  • No HTML tags allowed.
  • Web page addresses and e-mail addresses turn into links automatically.
  • Lines and paragraphs break automatically.