The slip torque setting of a Mach III torque limiter is held by a nut which is locked in place by set screws to apply a specific amount of compression to one or more disc springs. The setting can be changed by tightening or loosening this nut with an adjustable pin spanner wrench. Below are links to spanner wrenches for the various sizes of Mach III torque limiters which are available from a variety of sellers.

2 and 3 Inch Friction Diameter* Torque Limiter Models (0.75 to 2.0” Diameter, 3/16” Pin)
  • Applied Industrial Technologies
  • Grainger
  • McMaster-Carr
  • Motion Industries
  • 4 and 5 Inch Friction Diameter* Torque Limiters (1.125 to 3.0” Diameter, 1/4” Pin)
  • Applied Industrial Technologies
  • Grainger
  • McMaster-Carr
  • Motion Industries
  • 6 and 8 Inch Friction Diameter* Torque Limiters (4.5 to 6.25” Diameter, 3/8” Pin)
  • Applied Industrial Technologies
  • Grainger
  • McMaster-Carr
  • Motion Industries
  • *To determine the “friction diameter” of your Mach III torque limiter, refer to the second character in the product code. For example, the T4X2R-STH torque limiter has a 4 inch friction diameter. For a guide to locating the Mach III Product Code, click here.

    If additional assistance is needed, please contact Mach III Engineering.