Metric Hubs | McMaster-Carr

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	System of Measurement System of Measurement	Show

Metric

	System of Measurement System of Measurement	Hide

Inch

Metric

	For Shaft Diameter For Shaft Diameter

	For Shaft Type For Shaft Type

	Keyed
	Round

	Material Material

	Shaft Mount Type Shaft Mount Type

Clamp On

Set Screw

Machinable

	OD OD

	Construction Construction

	Multipiece

	For Shaft Misalignment Type For Shaft Misalignment Type


Angular	Parallel

Axial

	For Motion Type For Motion Type

Forward/Reverse

Start/Stop

Continuous

	Overall Length Overall Length

	Shaft Coupling Type Shaft Coupling Type

Flexible

	ID ID

	Set Screw Material Set Screw Material

Steel

Stainless Steel

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

DFARS Specialty Metals
COTS-Exempt

	Keyway Width Keyway Width

	Bushing Type Bushing Type

	Component Component

Hub

	Number of Set Screws Included Number of Set Screws Included

	Overall Width Overall Width

	Keyway Depth Keyway Depth

	Fastener Tightening Torque Fastener Tightening Torque

	Taper Taper

3°

8°

	Set Screw Finish Set Screw Finish

Black Oxide

Zinc Plated

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455 Products

About Shaft Couplings

Split-Tapered Bushings

The tapered barrel on these bushings is split on both sides, allowing them to contract more tightly around the shaft than quick-disconnect and taper-lock bushings.

Quick-Disconnect (QD) Bushings

The screw connections on these bushings easily mate to compatible quick-disconnect sprockets and pulleys.

Taper-Lock Bushings

Mount these hubless bushings flush into your sprocket or pulley for a slim profile with no protruding screws.

Self-Centering Screw-Clamp Bushings

A mounting flange prevents movement during tightening, so it's easy to center these bushings in your sprocket.

Quick-Grip Screw-Clamp Bushings

Also known as Trantorque bushings, these tighten with a twist of the collar nut—no screws needed.

Flush-Mount Screw-Clamp Bushings

Insert these bushings into the bore of your sprocket for flush or recessed mounting.

Flexible Shaft Couplings for Forward/Reverse Motion

Set Screw Flexible Shaft Couplings

Each hub includes a set screw (unless noted), which bites into your shaft to hold the coupling in place.

High-Torque Set Screw Flexible Shaft Couplings

The thick split spider on these couplings can take on twice as much torque as standard spiders, extending the life of bearings, seals, and motors.

Set Screw High-Parallel-Misalignment
Flexible Shaft Couplings

Each hub includes a set screw, which bites into your shaft to hold the coupling in place.

Clamping High-Parallel-Misalignment
Flexible Shaft Couplings

Designed to grip evenly around your shaft, these couplings provide more holding power than set screw couplings without marring the shaft.

Metal-Detectable Flexible Shaft Couplings

Designed for use in food-processing applications, where a fraying spider could contaminate a batch, these couplings have a metal-detectable rubber spider. Small pieces of metal inside the rubber will set off a metal detector, alerting you to the problem.

High-Angular-Misalignment Flexible Shaft Couplings

Also known as Schmidt couplings, these handle higher angular misalignment than other three-piece couplings. Good for applications with varying shaft misalignment, they're commonly used with conveyor rollers and roller feeds in printing and packaging machines.

Cleaned and Bagged Flexible
Heat-Resistant Shaft Couplings

Clamping Vibration-Damping
Precision Flexible Shaft Couplings

Designed to grip evenly around your shaft, these couplings provide more holding power than set screw couplings without marring the shaft.

Set Screw Vibration-Damping
Precision Flexible Shaft Couplings

Each hub includes a set screw, which bites into your shaft to hold the coupling in place.

High-Speed Vibration-Damping Flexible Shaft Couplings

Use these gear-shaped couplings for high-speed and high-torque applications.

About Shaft Couplings

Bushings for Chain and Belt Drives

Split-Tapered Bushings

Quick-Disconnect (QD) Bushings

Taper-Lock Bushings

Self-Centering Screw-Clamp Bushings

Quick-Grip Screw-Clamp Bushings

Flush-Mount Screw-Clamp Bushings

Flexible Shaft Couplings for Forward/Reverse Motion

Set Screw Flexible Shaft Couplings

High-Torque Set Screw Flexible Shaft Couplings

Set Screw High-Parallel-MisalignmentFlexible Shaft Couplings

Clamping High-Parallel-MisalignmentFlexible Shaft Couplings

Metal-Detectable Flexible Shaft Couplings

High-Angular-Misalignment Flexible Shaft Couplings

Cleaned and Bagged FlexibleHeat-Resistant Shaft Couplings

Clamping Vibration-DampingPrecision Flexible Shaft Couplings

Set Screw Vibration-DampingPrecision Flexible Shaft Couplings

High-Speed Vibration-Damping Flexible Shaft Couplings

High-Speed Vibration-Damping Flexible Shaft Couplings

Set Screw High-Parallel-Misalignment
Flexible Shaft Couplings

Clamping High-Parallel-Misalignment
Flexible Shaft Couplings

Cleaned and Bagged Flexible
Heat-Resistant Shaft Couplings

Clamping Vibration-Damping
Precision Flexible Shaft Couplings

Set Screw Vibration-Damping
Precision Flexible Shaft Couplings