Air Engaged Clutches - Through Shaft

Air Engaged Clutches – Through Shaft

Through Shaft Bored, Pilot Mount Friction Clutches

Function: Connect, Disconnect (Cycling Applications)
Drive Arrangement: Pilot Mounted Component to Shaft or Shaft to Pilot Mounted Component


  • Air pressure compresses drive and friction discs to produce torque.
  • Release springs provide positive disengagement when air is exhausted.
  • Torque is linear in response to air pressure applied.


  • Through/Mid Shaft or End Shaft.
  • Friction 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.
  • Friction clutches are designed for horizontal mounting. If vertical mounting is required, consult engineering for options.


  • Friction clutches are suitable for Connect/Disconnect and Cycling applications.
  • Maximum RPM varies by model. Please consult the detail sheets (below). Consult engineering if the intended application exceeds the listed maximum RPM.

Design Features

  • Industrial friction clutches are bored to suit up to the maximum shown (US & Metric) for easy installation.
  • Low coefficient friction lining versions are available for applications requiring slip or a narrower torque range. Contact engineering for details.
  • Machined pilot for easy mounting of pulley or sprocket.
Product CodeTorque @ 80 PSIMaximum Bore with Standard KeywayDetail SheetRequest 3D CAD Model
C2A2R-STH 190 lb-in0.500 in (12 mm) View PDFRequest
C3A2R-STH 555 lb-in1.000 in (24 mm) View PDFRequest
C4A2R-STH 1,317 lb-in1.250 in (31 mm)View PDFRequest
C5A2R-STH 2,587 lb-in1.438 in (38 mm)View PDFRequest
C5A2K-STH3,320 lb-in1.563 in (40 mm)View PDFRequest
C6A2G-STH5,397 lb-in2.000 in (52 mm)View PDFRequest
C6A2K-STH5,397 lb-in2.000 in (52 mm)View PDFRequest
C8A2K-STH9,212 lb-in2.500 in (66 mm)View PDFRequest
CAA2K-STH 14,755 lb-in2.750 in (72 mm)View PDFRequest
CBA2K-STH21,204 lb-in3.500 in (95 mm)View PDFRequest