Air Engaged Clutch Mechanisms With Adapters

Air Engaged Clutch Mechanisms With Adapters

Connect a Supported Shaft and Bearing Mounted Component

Function: Connect, Disconnect
Drive Arrangement: Shaft to Adapter Mounted Component


  • Friction clutch engages with air pressure, spring released when air is exhausted.
  • Torque is linear in response to air pressure applied.


  • Through/Mid Shaft or End of Shaft.
  • Clutch slides on shaft and is fixed with set screws and a customer supplied key.
  • Anti-rotation arm required to prevent rotation of the air housing.
  • Designed for horizontal mounting. If vertical mounting is required, consult engineering for options
  • Note: Clutch mechanism DOES NOT support Adapter.


  • Clutch mechanisms are suitable for cycling applications connecting and disconnecting two fully supported shafts.
  • Maximum RPM varies by model. Please consult the detail sheets (below). Consult engineering if the intended application exceeds the listed maximum RPM.

Design Features

  • Bored to suit up to the maximum shown (US & Metric) for easy installation
  • Machine face and bolt circle on adapter facilitate connection to bearing mounted pulley or gear
  • Low coefficient friction lining versions are available for applications requiring slip or a narrower torque range. Contact engineering for details.
Product CodeTorque @ 80 PSI Maximum Bore with Standard KeywayDetail SheetRequest 3D CAD Model
M2R2R-STH190 lb-in0.500 in (12 mm)View PDFRequest
M3R2R-STH555 lb-in1.000 in (24 mm)View PDFRequest
M4R2R-STH1,317 lb-in1.250 in (31 mm)View PDFRequest
M5R2R-STH2,587 lb-in1.438 in (38 mm)View PDFRequest
M5R2K-STH3,320 lb-in1.563 in (40 mm)View PDFRequest
M6R2G-STH5,397 lb-in2.000 in (52 mm)View PDFRequest
M6R2K-STH 5,397 lb-in2.000 in (52 mm)View PDFRequest
M8R2K-STH9,212 lb-in2.500 in (66 mm)View PDFRequest
MAR2K-STH14,755 lb-in2.750 in (72 mm)View PDFRequest
MBR2K-STH 21,204 lb-in3.500 in (95 mm) View PDFRequest