Spring Engaged Clutch - Heavy Duty

End of Shaft Bored, Pilot Mount Friction Clutches

  • Friction type heavy duty clutch is engaged with spring pressure
  • A fixed amount of torque is transmitted
  • To release clutch, air pressure is applied to overcome the spring pressure
  • End of Shaft
  • Heavy duty clutch slides on shaft and is fixed with set screws and a customer supplied key
  • No anti-rotation arm required
  • Heavy duty clutches are designed for horizontal mounting. If vertical mounting is required, consult engineering for options.
  • Heavy duty spring engaged clutches are suitable for applications requiring the clutch to remain engaged in the absence of air pressure or during a loss of power
  • Not suitable for 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
  • Heavy duty clutches are bored to suit up to the maximum shown for easy installation
  • Splined drive and toothed friction discs for heavy duty service
  • Machined pilot for easy mounting of pulley or sprocket
  • Enclosed design for dirty environments
  • High torque in limited space
  • Includes rotary air seal
Heavy Duty Spring Set Friction Clutches
Heavy Duty Clutch Repair Kits & Parts
Click Here or View PDF detail sheets
below for information.

Download Product ManualPrint Page

Product No. Friction Lining Coefficient Torque (Lb-In) Release Pressure (PSI) Maximum Bore with Standard Keyway
(Inches / Millimeters)
Length (Inches) Outside Diameter (Inches) Detail Sheet Request 3D CAD Model
E5D3K-STH High 2,901 73 1.560 / 40 7.90 7.00 View PDF request
E6D3K-STH High 4,957 77 2.000 / 52 8.76 8.07 View PDF request
E8D3K-STH High 8,193 72 2.500 / 66 10.18 10.00 View PDF request
EAD4K-STH High 19,231 78 2.750 / 72 11.70 12.00 View PDF request
EBD4K-STH High 24,375 73 3.500 / 95 13.03 13.88 View PDF request

Additional Information
Mach III heavy duty clutch units are solidly constructed with splined drives and toothed friction to provide reliable power transmission. The clutch pilot is machined for easy mounting of a sprocket or pulley in the field, or, Mach III can provide a sprocket, pulley or v-belt sheave pre-mounted on the heavy duty clutch when it ships from our factory. Heavy duty clutch models can be adapted to accommodate customer needs. See our Custom Designs Solutions page for more information. Mach III encourages contact with our engineering department before purchasing a heavy duty clutch for use in a new or retrofit application.

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