Shaft Couplings | McMaster-Carr

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	System of Measurement System of Measurement

	For Shaft Diameter For Shaft Diameter

0.235" to 0.500"

0.235" to 0.625"

0.235" to 0.750"

0.235" to 0.875"

1/4" to 5/8"

1/4" to 3/4"

1/4" to 7/8"

1/4" to 1"

0.360" to 1.000"

0.360" to 1.125"

0.360" to 1.250"

0.360" to 1.375"

7/16" to 1 1/8"

7/16" to 1 3/16"

7/16" to 1 3/8"

0.485" to 1.500"

0.485" to 1.750"

0.485" to 2.000"

1/2" to 1"

5/8" to 1 5/8"

5/8" to 1 7/8"

3/4" to 1 1/2"

3/4" to 2 1/8"

3/4" to 2 5/8"

1" to 2"

6.000 to 8.000mm

6.000 to 10.000mm

6.000 to 12.000mm

6.000 to 16.000mm

6.000 to 20.000mm

9.500 to 25.000mm

9.500 to 30.000mm

9.500 to 35.000mm

12.500 to 40.000mm

12.500 to 45.000mm

12.500 to 50.000mm

	For Shaft Type For Shaft Type

	Round
	Keyed
	Spline
	Hex
	Square

	Material Material

Stainless
Steel

	Shaft Mount Type Shaft Mount Type


Clamp On	Set Screw

Spring Pin	Press Fit

	For Shaft Misalignment Type For Shaft Misalignment Type

	Angular
	Parallel
	None
	Axial

	Construction Construction

	OD OD

	For Motion Type For Motion Type

Forward/Reverse

	Overall Length Overall Length

2 3/4"-3"

	Keyway Width Keyway Width

	Shaft Coupling Type Shaft Coupling Type

	Clamping Screw Material Clamping Screw Material

Stainless Steel

	Set Screw Material Set Screw Material

Stainless Steel

	Number of Clamping Screws Included Number of Clamping Screws Included

	Clamping Screw Type Clamping Screw Type

Socket Head Screw

	Keyway Depth Keyway Depth

	Maximum Torque Maximum Torque

	Number of Set Screws Included Number of Set Screws Included

	Angular Misalignment Capability Angular Misalignment Capability

	Finish Finish

	Parallel Misalignment Capability Parallel Misalignment Capability

	Clamping Screw Finish Clamping Screw Finish

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3,889 Products

Shaft Collars and Couplings

Flexible Shaft Couplings

Connect two shafts with up to 15Â° of misalignment. Flexible shaft couplings perform better than U-joints and flexible shafts in high-speed, low-torque applications. They're also better than U-joints for applications requiring precise movement and directional changes.

Rigid Shaft Couplings

Good for high-torque applications, rigid shaft couplings connect two shafts that are aligned, allowing for no relative movement between the shafts.

U-Joints

Compared to flexible shafts, U-Joints handle much greater torque and misalignment but operate at lower speeds. Use them for distances up to 10".

Flexible Shafts

Able to handle any kind of misalignment, flexible shafts connect shafts up to 3 ft. apart. They snake around curves and obstructions to transmit rotary motion along any path.

Shaft Adapters

Shaft Adapters

Convert your shaft to a larger or smaller size while also extending it. One side has a coupling that connects to your shaft; the other is the converted shaft size.

Torque-Limiting Shaft Couplings

Torque-Limiting Shaft Couplings

Also called slip clutches, these couplings slip when they exceed specific torque levels to protect motors and drivetrains and ensure safe operation.

Machinable Shaft Ends

One side is unfinished for milling custom pulleys, threaded hubs, sprockets, collars, knobs, sensor targets, or just about anything imaginable; the other side is a one-piece clamping coupling for mounting whatever youâ€™ve created to your shaft.

Other Shaft Couplings

Rod Ends and Linkages

Rod Ends and Linkages

Socket Adapters and Extensions

Socket Adapters and Extensions

Adapt sockets to fit wrenches of different drive sizes or change how you access and turn the fastener. Add an extension for longer reach.

Joint Covers

Joint Covers

Shield rotating joints, such as rod ends and U-joints, to keep lubricants in and contaminants out.

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The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)