Stepper Motor Couplings | McMaster-Carr

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System of Measurement

Shaft Diameter

Shaft Type

Overall Length

For Shaft Misalignment Type

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Material

Construction

For Rotary Motion

Flexible Shaft Coupling Cut Style

Length

Keyway Width

Maximum Torque

100 in·lbf to 249 in·lbf

250 in·lbf to 499 in·lbf

500 in·lbf to 999 in·lbf

1,000 in·lbf or greater

RoHS

Compliant

Not Compliant

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

Yes

REACH

Compliant

Not Compliant

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

1C998

EAR99

Flexible Shaft Coupling Type

Set Screw Material

Keyway Depth

Number of Set Screws Included

Angular Misalignment Capability

Clamping Screw Material

1,792 Products

Flexible Shaft Couplings

Precision Flexible Shaft Couplings

Set Screw Precision Flexible Shaft Couplings

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

136 products

Clamping Precision Flexible Shaft Couplings

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

393 products

Clamping Vibration-Damping Precision Flexible Shaft Couplings

Grip shafts evenly in precision motor and pump applications

40 products

Servomotor Precision Flexible Shaft Couplings

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

317 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-Speed Precision Flexible Shaft Couplings

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

117 products

High-Speed Servomotor Precision Flexible Shaft Couplings

Handle four times more speed than standard servomotor couplings

82 products

High-Misalignment Vibration-Damping Precision Flexible Shaft Couplings

Reduce vibration and compensate for high shaft misalignment

119 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

Set Screw Flexible Shaft Couplings

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

68 products

Clamping High-Parallel-Misalignment Flexible Shaft Couplings

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

29 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

Flexible-Shaft Shear Couplings

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

21 products

Clamping Flexible Shaft Couplings

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

12 products

Set Screw High-Parallel-Misalignment Flexible Shaft Couplings

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

22 products

Cleaned and Bagged Flexible Shaft Couplings

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

15 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

High-Angular-Misalignment Flexible Shaft Couplings

Withstand higher angular misalignment than other three-piece couplings

10 products

Shock-Absorbing Flexible Shaft Couplings

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

29 products

Flexible Shaft Couplings for Continuous Motion

Noncontact Magnetic Shaft Couplings

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

4 products

Lightweight Flexible Shaft Couplings

Nylon sleeves reduce weight and lower energy consumption

30 products

High-Speed Vibration-Damping Flexible Shaft Couplings

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

20 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

Splined Flexible Shaft Couplings

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

18 products

Splined-to-Keyed Flexible Shaft Couplings

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

27 products

Other Products

Torque Limiters

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

67 products

Pulley and Sprocket Bushings

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

79 products