Motor Couplings | McMaster-Carr

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System of Measurement

Shaft Diameter

Shaft Type

Construction

Material

Overall Length

For Shaft Misalignment Type

Shaft Mount Type

Keyway Width

For Rotary Motion

Length

Keyway Depth

Shaft Coupling Flexibility

Diameter

Maximum Torque

Less than 10,000 in·lbf

10,000 in·lbf to 19,999 in·lbf

20,000 in·lbf to 29,999 in·lbf

30,000 in·lbf to 39,999 in·lbf

40,000 in·lbf or greater

Not Rated

Maximum Rotation Speed

Set Screw Material

Number of Set Screws Included

RoHS

Compliant

Compliant with Exemptions

Not Compliant

Clamping Screw Material

Stainless Steel

Steel

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

REACH

Compliant

Not Compliant

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

1C998

EAR99

Shaft Coupling Connection

2,844 Products

Flexible Shaft Couplings

Set Screw Flexible Shaft Couplings

A set screw bites into your shaft to hold the coupling in place

68 products

High-Torque Set Screw Flexible Shaft Couplings

Take on twice as much torque as standard split spiders while a set screw holds hubs in place

20 products

Clamping Flexible Shaft Couplings

Grip shafts evenly for more holding power than set screw couplings without marring the shaft

12 products

Clamping High-Parallel-Misalignment Flexible Shaft Couplings

Grip misaligned shafts evenly for more holding power than set screw couplings

29 products

Shock-Absorbing Flexible Shaft Couplings

Flexible spring steel wraps around hub teeth to absorb sharp, momentary load increases

29 products

Flexible-Shaft Shear Couplings

Sever the connection between shafts when there's too much torque to protect parts from breaking

21 products

Metal-Detectable Flexible Shaft Couplings

Spider contains metal to trigger a detector if a piece breaks off, such as in food industry lines

12 products

Machinable-Bore Flexible Shaft Couplings

Customize the bore to align uncommon shaft sizes or correct worn and oversized shafts

52 products

Cleaned and Bagged Flexible Shaft Couplings

Often used in electronics manufacturing facilities and other extra-clean environments

15 products

High-Angular-Misalignment Flexible Shaft Couplings

Withstand higher angular misalignment than other three-piece couplings

10 products

Set Screw High-Parallel-Misalignment Flexible Shaft Couplings

A set screw bites into misaligned shafts to hold the coupling in place

22 products

Precision Flexible Shaft Couplings

Clamping Precision Flexible Shaft Couplings

Grip shafts evenly for more holding power than set screw couplings without marring the shaft

393 products

Set Screw Precision Flexible Shaft Couplings

A set screw bites into your shaft to hold the coupling in place

136 products

Servomotor Precision Flexible Shaft Couplings

Handle high twisting forces as well as misalignment in high-performance servomotor applications

317 products

Clamping Vibration-Damping Precision Flexible Shaft Couplings

Grip shafts evenly in precision motor and pump applications

40 products

High-Speed Servomotor Precision Flexible Shaft Couplings

Handle four times more speed than standard servomotor couplings

82 products

Set Screw Vibration-Damping Precision Flexible Shaft Couplings

A set screw bites into the shaft to hold the couplings in place in precision motors and pumps

44 products

High-Misalignment Vibration-Damping Precision Flexible Shaft Couplings

Reduce vibration and compensate for high shaft misalignment

119 products

High-Speed Precision Flexible Shaft Couplings

Handle all types of misalignment and are good for encoder motion-control applications

117 products

Electrically Isolating Servomotor Precision Flexible Shaft Couplings

An acetal plastic spacer insulates shaft components from stray electric current

18 products

High-Misalignment Precision Flexible Shaft Couplings

Compensate for more misalignment than other precision couplings

10 products

Flexible Shaft Couplings for Continuous Motion

High-Speed Vibration-Damping Flexible Shaft Couplings

Gear-shaped for high-speed and high-torque applications

20 products

Lightweight Flexible Shaft Couplings

Nylon sleeves reduce weight and lower energy consumption

30 products

High-Torque Flexible Shaft Couplings

A rugged roller‑chain design for excellent torque and angular misalignment capacity

12 products

Ultra-High-Torque Flexible Shaft Couplings

The rigid steel gear design transmits more torque than other couplings

12 products

Vibration-Damping Flexible Shaft Couplings

A flexible tire safeguards components by reducing vibration and shock

14 products

Noncontact Magnetic Shaft Couplings

Magnetic force compensates for misalignment by transferring torque without wear or contact

4 products

Splined-to-Keyed Flexible Shaft Couplings

Connect splined shafts to keyed ones, such as in compressors, pumps, and motors

27 products

Splined Flexible Shaft Couplings

Pair with splined shafts, which are commonly found in gearboxes and pumps

18 products

Other Products

Rigid Shaft Couplings

Join two shafts that are aligned and handle higher torque than flexible shaft couplings

696 products

Shaft Adapters

Increase or reduce your shaft's diameter to fit equipment, or replace damaged shaft ends

54 products

Machinable Shaft Ends

Mill custom pulleys, threaded hubs, sprockets, collars, and sensor targets and mount them to shafts

56 products

Torque Limiters

Keep torque at or below a set limit to control tension or braking or protect machinery from overload

127 products

U-Joints

Transfer torque between shafts at an angle; handle more torque and misalignment than flexible shafts

181 products

Clutch/Brakes

Control when to transmit power with a clutch and when to hold a load in place with a brake

5 products

Pulley and Sprocket Bushings

Mount between a rotating shaft and equipment to secure the shaft and reduce vibration

79 products