Air Engaged Clutches – NEMA Frame

Air Engaged Clutches – NEMA Frame

Function: Connect, Disconnect
Drive Arrangement: Motor to Gear Reducer (Gear Box)

  • Clutch input is bored and keyed to connect to a NEMA frame motor.
  • Clutch output shaft with key connects to a NEMA frame gear reducer.
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Air Engaged Clutches – Through Shaft

Air Engaged Clutches – Through Shaft

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

  • Bore Sizes to 3.500 inch, Torque Requirements to 21,204 lb.in.
  • Clutch is through bored and keyed for connection to a shaft in any axial location.
  • A sprocket, pulley or v-belt sheave can be mounted on the clutch pilot.
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Air Engaged Clutches – End of Shaft

Air Engaged Clutches – End of Shaft

Function: Connect, Disconnect
Drive Arrangement: Shaft to Pilot Mounted Component or Pilot Mounted Component to Shaft

  • Bore Sizes to 3.500 inch, Torque Requirements to 41,008 lb.in.
  • Clutch is blind bored and keyed for connection in an end of shaft location.
  • A sprocket, pulley or v-belt sheave can be mounted on the clutch pilot.
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Air Engaged Flexible Clutch Couplings

Air Engaged Flexible Clutch Couplings

Function: Connect, Disconnect
Drive Arrangement: Shaft to Shaft, Slight Angular Misalignment and/or Parallel Offset

  • Bore Sizes to 2.000 inch, Torque Requirements to 5,397 lb.in.
  • Clutch mechanism is through bored and keyed to connect to a fully supported shaft.
  • Coupling is bored and keyed to connect to a fully supported shaft.
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Air Engaged Clutch Mechanisms With Couplings

Air Engaged Clutch Mechanisms With Couplings

Function: Connect, Disconnect
Drive Arrangement: Shaft to Shaft, No Angular Misalignment and/or Parallel Offset

  • Bore Sizes to 3.500 inch, Torque Requirements to 21,204 lb.in.
  • Clutch mechanism is through bored and keyed to connect to a fully supported shaft.
  • Coupling is bored and keyed to connect to a fully supported shaft.
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Air Engaged Clutch Mechanisms With Adapters

Air Engaged Clutch Mechanisms With Adapters

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

  • Bore Sizes to 3.500 inch, Torque Requirements to 21,204 lb.in.
  • Clutch mechanism is through bored and keyed to connect to a fully supported shaft.
  • Adapter connects to a bearing mounted pulley, gear or other component.
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Spring Engaged Clutch – Through Shaft

Spring Engaged Clutch – Through Shaft

Function: Connect, Disconnect
Drive Arrangement: Shaft to Pilot Mounted Component or Pilot Mounted Component to Shaft

  • Bore Sizes to 3.500 inch, Torque Requirements to 23,733 lb.in.
  • Clutch is through bored and keyed to connection to a shaft in any axial location.
  • A sprocket, pulley or v-belt sheave can be mounted on the clutch pilot.
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Spring Engaged Clutch – End of Shaft

Spring Engaged Clutch – End of Shaft

Function: Connect, Disconnect
Drive Arrangement: Shaft to Pilot Mounted Component or Pilot Mounted Component to Shaft

  • Bore Sizes to 3.500 inch, Torque Requirements to 24,327 lb.in.
  • Clutch is blind bored and keyed for connection in an end of shaft location.
  • A sprocket, pulley or v-belt sheave can be mounted on the clutch pilot.
View Model & Specs

MACH III manufactures industrial pneumatic clutches in five primary mounting configurations. The right choice depends on your drive architecture, available space, and adjacent components:

  • NEMA frame mount. The clutch input bores to a NEMA frame motor; the output shaft connects to a NEMA frame gear reducer.
  • Through-shaft mount. Through-bored and keyed, the clutch mounts at any axial shaft location. Sprockets, pulleys, or V-belt sheaves mount on the clutch pilot. Bore to 3.500 in., torque to 21,204 lb-in.
  • End-of-shaft mount. Blind-bored for end-of-shaft connection, with the highest torque capacity in the standard lineup at 41,008 lb-in.
  • Shaft-to-shaft coupling. Two options: flexible clutch couplings that handle slight angular misalignment (bore to 2.000 in., torque to 5,397 lb-in.), and rigid clutch mechanisms with couplings for true in-line drives (bore to 3.500 in., torque to 21,204 lb-in.).
  • Adapter mount. For bearing-mounted pulleys, gears, or other components. Bore to 3.500 in., torque to 21,204 lb-in.

Not sure which configuration fits your drivetrain? Our selection guidelines walk through additional decision criteria.

Torque, Bore, and Shaft Size Ranges

Configuration Max Bore Max Torque
NEMA frame air engaged Per motor frame Per motor frame
Through-shaft air engaged 3.500 in. 21,204 lb-in.
End-of-shaft air engaged 3.500 in. 41,008 lb-in.
Flexible clutch coupling 2.000 in. 5,397 lb-in.
Shaft-to-shaft with coupling 3.500 in. 21,204 lb-in.
Spring engaged through-shaft 3.500 in. 23,733 lb-in.
Spring engaged end-of-shaft 3.500 in. 24,327 lb-in.

Imperial and metric bore sizes are available for every configuration except NEMA frame models, which bore to the connecting motor and gear reducer rather than a customer-specified size.

Custom Bores, Keyways, and Modifications

Every shaft-mounted pneumatic clutch we make is built to order with the bore and keyway you specify, and our catalog products are customizable. Submit your shaft dimensions, and MACH III can machine to those specs. Required sprockets, pulleys, and sheaves can also be installed at the factory ahead of time to streamline field installation.

For modifications beyond bore and keyway, MACH III’s engineering team can handle short-run custom work down to one or two units. Custom order lead time is typically 3 to 5 weeks, with every unit tailored to your application and 100% tested before shipping from our Elmira, NY, facility.

Specs, 3D Models, and Detail Sheets

Each product page includes downloadable detail sheets containing dimensional data, torque and pressure specifications, and more. 3D models are available in STP and IGS formats—request by part number through the form on any product page.

Request a Custom-Fit Pneumatic Clutch from MACH III

If your application requires a non-standard bore, a specific keyway, or a mounting arrangement not covered by catalog products, MACH III can handle short-run custom orders of a single or handful of units. As a pneumatic clutch manufacturer, MACH III supplies air-engaged and spring-engaged friction clutches for material handling and packaging applications.

Every unit is built to your shaft and tested before it ships. Request a quote or submit your custom bore and mounting specs to our engineering team.

Mach III Industrial Friction Clutch Features

  • Soft start friction engagement
  • Multiple disc clutch designs for high torque in a compact package.
  • Each friction clutch is built to order with the precise Imperial or Metric bore and keyway requested.
  • Required pulleys, sprockets and v-belt sheaves can be installed at the factory to simplify field installation.
  • Industrial friction clutches are easy and economical to use with long, low maintenance service life when properly applied and operated.