Foot Mount Tension Control Clutches

Foot Mount Tension Control Clutches

SensiFlex® Patented Tension Control Technology

Engineered to deliver precision control of web tension without sticking, pulsing or cogging.


  • Friction clutch engages with air pressure and is designed for continuous slip.
  • Clutch is spring released when air is exhausted.
  • Torque is linear in response to air pressure applied.


  • Foot brackets attach to machine frame or other fixture.
  • Pulleys or sprockets mount to the clutch’s input and output shafts.
  • Designed for horizontal or vertical mounting.



  • For tension control applications requiring input and output shaft connections.
  • Clutch drives output shaft when engaged.
  • Input shaft and cooling sleeve rotate at the speed of the drive input.
  • Maximum RPM varies by model. Please consult the detail sheets (below). Consult engineering if the intended application exceeds the listed maximum RPM.

Design Features

  • Exclusive, patented actuator engages smoothly at low pressures and provides maximum sensitivity to slight changes in air pressure for infinite control of torque output.
  • Radial cooling holes pull cooler, ambient air through the clutch or brake to dissipate the heat generated by constant slip, preventing friction lining fade and premature wear.
Product Code Torque @ 80 PSIHeat Dissipation @ 1800 RPMOutput Shaft Diameter With Std. Keyseat Detail Sheet Request 3D CAD Model
38FM-ULOW 36 lb-in0.19 0.500 inView PDFRequest
38FM66 lb-in0.19 tHP0.500 inView PDFRequest
58FM-ULOW122 lb-in0.57 tHP 0.750 inView PDFRequest
58FM222 lb-in0.57 tHP0.750 inView PDFRequest
78FM-ULOW 326 lb-in1.02 tHP0.750 inView PDFRequest
78FM 593 lb-in1.02 tHP0.750 inView PDFRequest
98FM-ULOW 668 lb-in1.36 tHP1.250 inView PDFRequest
98FM1,214 lb-in1.36 tHP1.250 inView PDFRequest
118FM-ULOW 1,296 lb-in1.90 tHP1.625 inView PDFRequest
118FM2,356 lb-in1.90 tHP1.625 inView PDFRequest