Air-Air Clutch-Brakes To Stop and Start the Shaft

Air-Air Clutch-Brakes To Stop and Start the Shaft

Combination Air Applied Clutch and Air Applied Brake

Function: Starting and Stopping / Holding The Shaft
Drive Arrangement: Pilot Mounted Component to Shaft


  • Applying air pressure engages the friction clutch or friction brake. Each requires a separate air signal.
  • Torque of the clutch and brake is linear in response to air pressure applied.


  • Through (Mid) Shaft or End of Shaft.
  • Clutch Brake slides on shaft and is fixed with set screws and a customer supplied key.
  • Anti-rotation arm required to react, brake, and prevent rotation of the air housing.
  • Clutch Brakes are designed for horizontal mounting. If vertical mounting is required, consult engineering for options.


  • Stop/Start, Cycling, Indexing with input from a constantly driven sprocket or pulley.
  • For applications with similar clutch and brake torque requirement.
  • Maximum RPM varies by model and is listed on the PDF detail sheet (see table below). Consult engineering if the intended application exceeds the listed maximum RPM.

Design Features

  • Clutch and brake combined in one unit for simplified mounting and control.
  • Clutch brakes are bored to suit within the ranges shown on each product’s detail sheet (Imperial & Metric) for easy installation.
  • Machined pilot for easy mounting of pulley or sprocket.
Product Code Clutch Torque @ 80 PSI Brake Torque @ 80 PSI Maximum Bore with Standard KeywayDetail Sheet Request 3D CAD Model
Z3A1R-STH 280 lb-in 280 lb-in1.000 in (24 mm) View PDFRequest
Z4A1R-STH 611 lb-in611 lb-in1.250 in (31 mm) View PDFRequest
Z5A1R-STH 1,249 lb-in1,249 lb-in1.43 in (38 mm)View PDFRequest
Z6A1G-STH 2,868 lb-in2,868 lb-in2.000 in (52 mm)View PDFRequest