Shaft Extensions | 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
	Hex
	Spline
	Square

	Material Material

Stainless
Steel

	For Shaft Misalignment Type For Shaft Misalignment Type

	None
	Parallel
	Angular
	Axial

	Shank Thread Size Shank Thread Size

	Shaft Mount Type Shaft Mount Type


Clamp On	Set Screw

Spring Pin	Press Fit

	Rod End Type Rod End Type

	Ball Joint
	Bolt
	Ball Joint Linkage
	Clevis

	OD OD

	Overall Length Overall Length

2 3/4"-3"

	Shank Gender Shank Gender


Male	Female

	For Motion Type For Motion Type

Forward/Reverse

	Shaft Coupling Type Shaft Coupling Type

	Construction Construction


One Piece	Two Piece

Three Piece	Multipiece

	ID ID

	Shank Thread Direction Shank Thread Direction

	Clamping Screw Material Clamping Screw Material

Stainless Steel

	Finish Finish

	Number of Clamping Screws Included Number of Clamping Screws Included

	Shank Center Length Shank Center Length

	Clamping Screw Type Clamping Screw Type

Socket Head Screw

	Keyway Width Keyway Width

	Shank Thread Length Shank Thread Length

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4,206 Products

Shaft Collars and Couplings

Shaft Connectors

Shaft Connectors

Couplings, universal joints, and flexible shafts connect two shafts together and transfer torque from one to the other.

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.

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 you’ve created to your shaft.

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.

Other Shaft Extensions

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.

Hollow Female Threaded Rods

Connect and separate threaded rods, studs, and other components. These hollow rods have internal threads on both ends, so you can make connections and still pass wiring and other objects through the center of the rod.

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