Machine Design

Safety sprocket prevents torque overloads

Protection against torque overloads on conveyor systems is often overlooked until something jams, causing expensive downtime and damage.

The SK111OXX safety sprocket from R + W America, Bensenville, Ill. (, uses a patented ball-detent arrangement to disengage within 3 msec of a torque overload. It reengages and resumes driving once the overload is cleared. Disengagement torque can range from 14 oz/in. to 1,843 lb/ft and shafts can be 0.125 to 7 in. in diameter. The low-cost solution is backlash-free and combines sprocket, bearing, and torque limiter in one package. It can also be configured so that disengagements trigger a motor cutoff switch.

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.