Belt Tension | McMaster-Carr

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1,769 Products

Belt Tension Gauges

Keep an eye on belt tension to minimize vibration, noise, and slippage.

Wide-Range Belt Tension Gauges

Measure belt tension up to 2,200 lbs.

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.

Timing Belts and Pulleys

MXL Series Corrosion-Resistant Timing Belt Pulleys

Anodized aluminum has good corrosion 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.

MXL Series Lightweight Timing Belt Pulleys

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

T Series Timing Belt Pulleys

Made of aluminum, these pulleys have good corrosion resistance.

L Series Corrosion-Resistant Timing Belt Pulleys

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

XL Series Lightweight Timing Belt Pulleys

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

XL Series Corrosion-Resistant Timing Belt Pulleys

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

L Series Timing Belt Pulleys

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

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.

XL Series Timing Belt Pulleys

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

Timing Belt Idler Pulleys

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

AT Series Timing Belt Pulleys

Made of aluminum, these pulleys have good corrosion resistance.

XXH Series Quick-Disconnect Timing Belt Pulleys

To prevent slippage while moving extra heavy loads, these pulleys mount with a bushing for a more secure grip on the shaft than set screws and press-fit pulleys.

XH Series Timing Belt Pulleys

Made of iron, these pulleys are strong enough to carry extra heavy loads.

XH Series Quick-Disconnect Timing Belt Pulleys

Securely carry heavy loads—these pulleys mount with a bushing for a better grip on the shaft than set screws and press-fit pulleys.

High-Strength Timing Belts and Pulleys

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 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 Pulleys with Hex Bore

Mount these high torque drive (HTD) pulleys onto a hex shaft.

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 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.

Timing Belt Pulley Bar Stock

Machine your own timing belt pulleys to fit the exact width and shaft diameter needed.

V-Belt Pulleys

Constant-Tension V-Belt Pulleys

A built-in spring maintains tension on your belt.

Heavy Duty V-Belt Pulleys

These pulleys are cast iron.

V-Belt Pulleys

Choose from nylon, UHMW, and zinc.

Adjustable-Pitch V-Belt Pulleys

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

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.

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

Use these pulleys with compatible quick-disconnect bushings.

Taper-Lock Bushing-Bore V-Belt Pulleys

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

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.

Round-Belt Pulleys

Round-Belt Idler Pulleys

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

Round-Belt Pulleys

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

Roller Chain and Belt Tensioners

Heavy Duty Spring-Loaded Adjustable-Arm
Belt and Roller Chain Tensioners

Maintain correct drive tension to ensure smooth operation for maximum power and a long service life.

Heavy Duty Spring-Loaded Belt
and Roller Chain Tensioners

Designed for large belt and chain drives, these tensioners maintain correct drive tension for smooth operation, maximum power, and a long service life.

Spring-Loaded Adjustable-Arm
Roller Chain and Belt Tensioners

Apply continuous tension and automatically take up slack at any point in a 180° arc.

Adjustable-Screw Roller Chain and Belt Tensioners

Precisely apply tension in a straight line by moving the adjustment screw.

Adjustable-Arm Roller Chain and Belt Tensioners

Position the adjustment arm to control tension in a 360° arc.

Belt Conveyors

Conveyor Belt Tensioners

A tensioner extends or retracts the conveyor pulley to adjust the tension on the conveyor belt.

Bearings for Conveyor Belt Tensioners

Use on a conveyor pulley with a conveyor belt tensioner to adjust the tension on a conveyor belt.

Enclosed Conveyor Belt Tensioners

These tensioners have a totally enclosed adjusting screw to prevent debris buildup and thread damage.

Idler Wheels for Conveyor Chain Belts

Idler wheels keep the belt moving and prevent sagging.