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

	Shaft Mount Type Shaft Mount Type

Clamp On

Set Screw

Machinable

	Material Material

	OD OD

	ID ID

	Construction Construction

	Multipiece

	For Shaft Misalignment Type For Shaft Misalignment Type


Angular	Parallel

Axial

	Overall Length Overall Length

	For Motion Type For Motion Type

Forward/Reverse

Start/Stop

Continuous

	Bushing Type Bushing Type

	Shaft Coupling Type Shaft Coupling Type

Flexible

	Keyway Width Keyway Width

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

DFARS Specialty Metals
COTS-Exempt

	Overall Width Overall Width

	Set Screw Material Set Screw Material

Steel

Stainless Steel

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	Number of Set Screws Included Number of Set Screws Included

	Keyway Depth Keyway Depth

	Component Component

Hub

	Fastener Tightening Torque Fastener Tightening Torque

416 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 takes on twice as much torque as standard split spiders, while a set screw holds the hubs in place on your shaft. Also known as jaw couplings, use them to connect motors to pumps, mixers, and other high-torque equipment.

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.

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.

Metal-Detectable Flexible Shaft Couplings

Safely connect slightly misaligned shafts near food lines—the spider on these couplings contains metal, so it’ll trigger a metal detector if a piece frays off and contaminates your batch.

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 Shaft Couplings

Often used in electronics manufacturing facilities and other extra-clean environments, these shaft couplings are cleaned and individually bagged to keep out contaminants.

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.

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.

High-Speed Vibration-Damping Flexible Shaft Couplings

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