Overrunning Clutches | McMaster-Carr

	System of Measurement System of Measurement

Inch

Metric

	For Shaft Diameter For Shaft Diameter

	Maximum Torque Maximum Torque

	For Shaft Type For Shaft Type

Keyed

Round

	OD OD

	Torque Adjustability Torque Adjustability

Adjustable

Fixed

	Shaft Mount Type Shaft Mount Type

Set Screw

Spring Pin

	Torque-Limiting Mechanism Torque-Limiting Mechanism

Disengages

Brake

	For Shaft Misalignment Type For Shaft Misalignment Type


None	Angular

Parallel

	Maximum Speed Maximum Speed

	Keyway Width Keyway Width

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Overall Length Overall Length

	Overall Width Overall Width

	Torque Limiter Type Torque Limiter Type

Double Spring

Single Spring

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

	Construction Construction

One Piece

Multipiece

Two Piece

	Keyway Depth Keyway Depth

	Shaft Coupling Type Shaft Coupling Type

Flexible

Rigid

	Torque-Limiting Direction Torque-Limiting Direction

Clockwise and
Counterclockwise

Clockwise

Counterclockwise

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	Minimum Torque Minimum Torque

	For Maximum Sprocket or Pulley Width For Maximum Sprocket or Pulley Width

199 Products

Torque-Limiting Shaft-to-Shaft Couplings

Torque-Limiting Flexible Shaft Couplings with Alarm

If they exceed maximum torque, these couplings disengage, sound an alarm, and then automatically re-engage once the overtorque condition is eliminated.

Torque-Limiting Flexible Shaft Couplings

Protect shafts, motors, and gear boxes from damage that’s caused by torque overload from machine jams and emergency stops.

Torque-Limiting Shaft Couplings

Adjust your system's torque limit by hand.

Air-Powered Torque-Limiting Shaft Couplings

Often used in automated systems, these couplings are air actuated so you can adjust the torque during operation.

Torque-Limiting Shaft-to-Gear Couplings

Electromagnetic Tensioning, Holding,
and Stopping Shaft-to-Gear Couplings

Also known as electric hysteresis brakes, these couplings use magnetic force to create drag to slow or stop the motion of your drive system.

Electromagnetic Torque-Limiting
Shaft-to-Gear Couplings

Use these with an overload sensor in an automated system to instantly disconnect power and prevent damage. Couplings also accelerate loads from zero to full speed in less than three milliseconds when the power is turned on.

Torque-Limiting Shaft-to-Gear Couplings

Adjust your system's torque limit by hand.

Air-Powered Torque-Limiting Shaft-to-Gear Couplings

Often used in automated systems, these couplings are both air actuated and remotely adjustable, so you can adjust the torque setting even during operation.

Magnetic Torque-Limiting Shaft-to-Gear Couplings

Also known as hysteresis clutches, these couplings use magnetic force to brake, control tension, and prevent torque overload. They have few moving parts, so they last longer than mechanical couplings.

Magnetic Torque-Limiting
Shaft-to-Gear Couplings with Shaft

Also known as hysteresis clutches, these couplings use magnetic force to brake, control tension, and prevent torque overload. They have a shaft on one end for connecting to other components.

Torque Limiters for Chain and Belt Drives

Prevent damage from overloading. When overloaded, these limiters cause your sprocket or pulley to slip. Once the overload is removed, the limiters automatically reset.

Torque-Limiting Shaft-to-Shaft Couplings

Torque-Limiting Flexible Shaft Couplings with Alarm

Torque-Limiting Flexible Shaft Couplings

Torque-Limiting Shaft Couplings

Air-Powered Torque-Limiting Shaft Couplings

Torque-Limiting Shaft-to-Gear Couplings

Electromagnetic Tensioning, Holding,and Stopping Shaft-to-Gear Couplings

Electromagnetic Torque-LimitingShaft-to-Gear Couplings

Torque-Limiting Shaft-to-Gear Couplings

Air-Powered Torque-Limiting Shaft-to-Gear Couplings

Magnetic Torque-Limiting Shaft-to-Gear Couplings

Magnetic Torque-LimitingShaft-to-Gear Couplings with Shaft

Torque Limiters for Chain and Belt Drives

Torque Limiters for Chain and Belt Drives

Electromagnetic Tensioning, Holding,
and Stopping Shaft-to-Gear Couplings

Electromagnetic Torque-Limiting
Shaft-to-Gear Couplings

Magnetic Torque-Limiting
Shaft-to-Gear Couplings with Shaft