Clutch-Brakes with Air Engaged Clutch-Air Engaged Brake

Stop and Start the Shaft Clutch-Brakes, Pilot Mount Component Input

  • 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. Please consult the detail sheets (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
Stop & Start the Shaft Clutch-Brakes
Clutch Brake Repair Kits & Parts
Click here or view PDF detail sheets
below for more information.

Download Product ManualPrint Page

Product No. Clutch Torque (Lb-In) @ 80 PSI Brake Torque (Lb-In) @ 80 PSI Maximum Bore with Standard Keyway
(Inches / Millimeters)
Length (Inches) Outside Diameter (Inches) Detail Sheet Request 3D CAD Model
Z3A1R-STH 280 280 1.000 / 24 6.03 4.44 View PDF request
Z4A1R-STH 611 611 1.250 / 31 7.03 5.47 View PDF request
Z5A1R-STH 1249 1249 1.438 / 38 7.57 6.69 View PDF request
Z6A1G-STH 2868 2868 2.000 / 52 10.03 8.74 View PDF request

Additional Information

Mach III stop and start the shaft clutch brake units are solidly constructed to provide reliable power transmission. The clutch brake pilot is machined for easy mounting of a sprocket or pulley in the field, or, Mach III can provide the sprocket or pulley pre-mounted on the clutch brake when it ships from our factory. Clutch brake models can be adapted to accommodate customer needs. See our Custom Design Solutions page for more information. Mach III encourages contact with our engineering department before purchasing a clutch brake for use in a new or retrofit application.

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