Synchronous Belts | McMaster-Carr

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	Teeth Location Teeth Location


Teeth on One Side	Teeth on Both Sides

	Belt Trade Number Belt Trade Number

	Belt Trade Size Belt Trade Size

	Teeth Shape Teeth Shape

	Trapezoidal
	Curved
	Tire Track

	Material Material

	Reinforcement Material Reinforcement Material

	For Maximum Belt Width For Maximum Belt Width

	Color Color

	Black
	Gray
	White

	For Shaft Diameter For Shaft Diameter

	For Belt Trade Size For Belt Trade Size

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

DFARS Specialty Metals
COTS-Exempt

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

RoHS Compliant

	Maximum Temperature Maximum Temperature

	Minimum Temperature Minimum Temperature

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

REACH Compliant

	OD OD

	Teeth Finish Teeth Finish

Nylon Coated

Polyamide Coated

	Manufacturer Equivalent Number Manufacturer Equivalent Number

2,817 Products

L Series Timing Belts and Pulleys

L Series Timing Belts

Neoprene is reinforced with fiberglass for quiet operation with high strength.

L Series Dust-Free Timing Belts

Urethane has excellent abrasion resistance, so these belts don’t create dust while they run.

L Series Heat-Resistant Timing Belts

Withstanding temperatures up to 400° F, silicone is the best choice for use in hot environments. Belts have Kevlar reinforcement, which has very high strength, low stretch, and excellent shock resistance.

L Series Timing Belt Pulleys

These L series (light) pulleys and have trapezoidal teeth.

L Series Corrosion-Resistant Timing Belt Pulleys

Pulleys are anodized aluminum, which is more corrosion resistant than steel.

L Series Quick-Disconnect Timing Belt Pulleys

Carry heavy loads without slippage—pulleys mount with a bushing for a more secure grip on the shaft than set screws.

L Series Dust-Free Cut-to-Length Timing Belts

Known for excellent abrasion resistance, use one of these urethane belts in your linear motion application to don’t create dust while they run. Belts have Kevlar reinforcement, which has very high strength, low stretch, and excellent shock resistance.

L Series Cut-to-Length Timing Belts

Quiet-running neoprene is reinforced with high-strength fiberglass for use in general purpose linear motion drives.

L Series Timing Belts with Teeth on Both Sides

Use a single belt to drive three or more pulleys in reversing and serpentine drive systems. These belts have teeth on both sides to transmit power from either side and rotate pulleys in opposite directions. Belts are neoprene with fiberglass reinforcement for quiet operation with high strength.

XL Series Timing Belts and Pulleys

XL Series Timing Belts

Belts combine neoprene with fiberglass reinforcement for quiet operation with high strength.

XL Series Dust-Free Timing Belts

Abrasion-resistant urethane means these belts don’t create dust while they run.

XL Series Heat-Resistant Timing Belts

Resisting temperatures up to 400° F, silicone can take the heat. Belts have Kevlar reinforcement, which has very high strength, low stretch, and excellent shock resistance.

XL Series Corrosion-Resistant Timing Belt Pulleys

Pulleys are anodized aluminum, which is more corrosion resistant than steel.

XL Series Timing Belt Pulleys

Pulleys are XL series (extra light) and have trapezoidal teeth.

XL Series Lightweight Timing Belt Pulleys

Acetal and aluminum construction makes these pulleys useful in for weight-sensitive applications.

XL Series Cut-to-Length Timing Belts

Use quiet-running neoprene with high-strength fiberglass reinforcement in your linear motion drive system.

XL Series Dust-Free Cut-to-Length Timing Belts

Drive linear motion while maintaining a clean environment—urethane has excellent abrasion resistance so these belts don’t create dust while they run. They have Kevlar reinforcement, which has very high strength, low stretch, and excellent shock resistance.

XL Series Timing Belts with Teeth on Both Sides

Often used in reversing and serpentine drive systems, teeth on both sides allow you to rotate pulleys in opposite directions. Belts are quiet-running neoprene and high-strength fiberglass.

H Series Timing Belts and Pulleys

H Series Timing Belts

Good for use in general purpose drive systems, these belts combine quiet-running neoprene with high-strength fiberglass reinforcement.

H Series Dust-Free Timing Belts

Urethane has excellent abrasion resistance, so these belts don’t create dust while they run. Belts have steel reinforcement, which has very high strength, low stretch, and excellent shock resistance.

H Series Heat-Resistant Timing Belts

Enduring temperatures up to 400° F, silicone is the best choice for use in hot environments. Belts have Kevlar reinforcement, which has very high strength, low stretch, and excellent shock resistance.

H Series Quick-Disconnect Timing Belt Pulleys

Move heavy loads without slippage—pulleys mount with a bushing for a more secure grip on the shaft than set screws.

H Series Timing Belt Pulleys

Pulleys are H series (heavy) and have trapezoidal teeth.

H Series Cut-to-Length Timing Belts

Designed for use in linear motion drives, these belts are neoprene with fiberglass reinforcement for quiet operation with high strength.

H Series Dust-Free Cut-to-Length Timing Belts

Known for excellent abrasion resistance, use a urethane belt in your linear motion application to avoid dust from wear. They have Kevlar reinforcement, which has very high strength, low stretch, and excellent shock resistance.

MXL Series Timing Belts and Pulleys

MXL Series Timing Belts

Quiet-running neoprene is reinforced with high-strength fiberglass for use in general purpose drive systems.

MXL Series Dust-Free Timing Belts

Urethane has excellent abrasion resistance, so these belts don’t create dust while they run. They have Kevlar reinforcement, which has very high strength, low stretch, and excellent shock resistance.

MXL Series Corrosion-Resistant Timing Belt Pulleys

Anodized aluminum has good corrosion resistance.

MXL Series Lightweight Timing Belt Pulleys

Made from polycarbonate, these pulleys are useful in applications with weight constraints.

MXL Series Cut-to-Length Timing Belts

Used to drive small-scale linear motion applications, these belts are neoprene with fiberglass reinforcement for quiet operation with high strength.

T Series Timing Belts and Pulleys

T Series Dust-Free Timing Belts

Belts are abrasion-resistant urethane, so they don’t create dust while they run. They have steel reinforcement, which has very high strength, low stretch, and excellent shock resistance.

T Series Timing Belt Pulleys

Made of aluminum, these pulleys have good corrosion resistance.

End Plates for Cut-to-Length Timing Belts

Secure the ends of Cut-to-Length Timing Belts to flat surfaces for linear motion drive applications.

AT Series Timing Belts and Pulleys

AT Series Dust-Free Cut-to-Length Timing Belts

Urethane has excellent abrasion resistance, so these belts don’t create dust while they run. They have steel reinforcement, which has very high strength, low stretch, and excellent shock resistance.

AT Series Timing Belt Pulleys

Made of aluminum, these pulleys have good corrosion resistance.

Timing Belt Idler Pulleys

Add these free-spinning pulleys to your timing belt setup to minimize vibration and keep belts from wearing out.

High-Strength Timing Belts and Pulleys

High-Strength HTD Timing Belts

HTD (high torque drive) timing belts have a curved tooth shape that provides higher strength than trapezoidal teeth. Belts are neoprene with fiberglass reinforcement for quiet operation.

High-Strength HTD Cut-to-Length Timing Belts

Curved teeth made from fiberglass-reinforced neoprene make these HTD (high-torque drive) belts stronger and quieter than belts with trapezoidal teeth.

High-Strength HTD Timing Belt Pulleys

These HTD (high torque drive) pulleys have a curved tooth shape that provides higher strength than trapezoidal teeth.

High-Strength Corrosion-Resistant
HTD Timing Belt Pulleys

Move belts forward and backward or stop and start them in precise positions, especially in areas where rust is a concern.

High-Strength HTD Timing Belt Idler Pulleys

Keep high torque drive (HTD) timing belt systems running tightly with these idler pulleys. Made with built-in, free-spinning ball bearings, they're installed on shafts or belt tensioners to remove slack from timing belts.

High-Strength Ultra-Quiet Timing Belts

These quiet-running timing belts have a curved tooth shape that provides higher strength than trapezoidal teeth.

High-Strength Ultra-Quiet Timing Belt Pulleys

Teeth are curved and set in an offset pattern for high strength with 25% less operating noise than pulleys and belts with trapezoidal teeth.

Ultra-High-Strength Poly Chain Timing Belts

Strong enough to replace roller chain, these timing belts combine the high strength of a curved tooth with high-strength carbon fiber reinforcement.

Ultra-High-Strength Poly Chain Timing Belt Pulleys

Curved teeth with a high pitch provide superior load distribution and reduce wear. They mount with a bushing for a more secure grip on the shaft than set screws.

High-Strength GT Timing Belt Pulleys

For higher speed or higher torque applications, these GT series timing belt pulleys provide a more precise fit than HTD pulleys. Use them where accuracy is critical, such as in storage and retrieval systems or in robotics.

Round-Belt Pulleys

Mount these pulleys directly onto a shaft to transmit rotary motion and torque.

Round-Belt Idler Pulleys

These pulleys spin freely on built-in bearings to maintain tension for reduced wear and vibration.

V-Belt Pulleys

Choose from nylon, UHMW, and zinc.

Heavy Duty V-Belt Pulleys

These pulleys are cast iron.

Adjustable-Pitch V-Belt Pulleys

Increase efficiency, vary speed, and extend the life of your drive by changing the pitch on these pulleys.

Constant-Tension V-Belt Pulleys

A built-in spring maintains tension on your belt.

Adjustable-Speed V-Belt Pulleys

Also known as step-cone pulleys, these have multiple groove sizes so you can quickly change rotation speed by moving your belt to a different groove.

Taper-Lock Bushing-Bore V-Belt Pulleys

Mount these pulleys with a taper-lock bushing for a tight, wobble-free hold on your shaft.

Quick-Disconnect (QD) Bushing-Bore V-Belt Pulleys

Use these pulleys with compatible quick-disconnect bushings.

Split-Tapered Bushing-Bore V-Belt Pulleys

These pulleys have the same sizing versatility as quick-disconnect pulleys, but they create a tighter grip on bushings for use in high-torque applications.

V-Belt Idler Pulleys

These pulleys spin freely on built-in ball bearings to maintain tension for reduced wear and vibration.

Flat-Belt Pulleys

Flat-Belt Idler Pulleys

These pulleys spin freely on built-in bearings to maintain tension for reduced wear and vibration.

Flat-Belt Pulleys

Also known as paper-plant pulleys, these are made of a paper-fiber composite that minimizes belt slippage and wear.

L Series Timing Belts and Pulleys

L Series Timing Belts

L Series Dust-Free Timing Belts

L Series Heat-Resistant Timing Belts

L Series Timing Belt Pulleys

L Series Corrosion-Resistant Timing Belt Pulleys

L Series Quick-Disconnect Timing Belt Pulleys

L Series Dust-Free Cut-to-Length Timing Belts

L Series Cut-to-Length Timing Belts

L Series Timing Belts with Teeth on Both Sides

XL Series Timing Belts and Pulleys

XL Series Timing Belts

XL Series Dust-Free Timing Belts

XL Series Heat-Resistant Timing Belts

XL Series Corrosion-Resistant Timing Belt Pulleys

XL Series Timing Belt Pulleys

XL Series Lightweight Timing Belt Pulleys

XL Series Cut-to-Length Timing Belts

XL Series Dust-Free Cut-to-Length Timing Belts

XL Series Timing Belts with Teeth on Both Sides

H Series Timing Belts and Pulleys

H Series Timing Belts

H Series Dust-Free Timing Belts

H Series Heat-Resistant Timing Belts

H Series Quick-Disconnect Timing Belt Pulleys

H Series Timing Belt Pulleys

H Series Cut-to-Length Timing Belts

H Series Dust-Free Cut-to-Length Timing Belts

MXL Series Timing Belts and Pulleys

MXL Series Timing Belts

MXL Series Dust-Free Timing Belts

MXL Series Corrosion-Resistant Timing Belt Pulleys

MXL Series Lightweight Timing Belt Pulleys

MXL Series Cut-to-Length Timing Belts

T Series Timing Belts and Pulleys

T Series Dust-Free Timing Belts

T Series Timing Belt Pulleys

End Plates for Cut-to-Length Timing Belts

End Plates for Cut-to-Length Timing Belts

AT Series Timing Belts and Pulleys

AT Series Dust-Free Cut-to-Length Timing Belts