Belt Tighteners | McMaster-Carr

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122 Products

Tensioners for Chain and Belt Drives

Spring-Loaded Adjustable-Arm
Roller Chain and Belt Tensioners

Spring-Loaded Adjustable-Arm Roller Chain and Belt Tensioners

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

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

Adjustable-Arm Roller Chain and Belt Tensioners

Adjustable-Arm Roller Chain and Belt Tensioners

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

Adjustable-Screw Roller Chain and Belt Tensioners

Adjustable-Screw Roller Chain and Belt Tensioners

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

Floating Roller Chain Tensioners

Mount these tensioners directly onto your chain drive. They have adjustable straps that take up slack and apply constant tension.

Channel-Guided Roller Chain Tensioners

These tensioners range in height from 5 15/32" to 7 25/32".

Ultra-Low-Profile Channel-Guided
Roller Chain Tensioners

Able to fit in tight spots, these tensioners are less than 3" tall.

Low-Profile Channel-Guided
Roller Chain Tensioners

At less than 4" in height, these tensioners are good for use on low-clearance drives.

Conveyor Belt Tensioners

Bearings for Conveyor Belt Tensioners

Bearings for Conveyor Belt Tensioners

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

Conveyor Belt Tensioners

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

Enclosed Conveyor Belt Tensioners

Enclosed Conveyor Belt Tensioners

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

Thread-Mount Idler Rotary Shafts

Thread-Mount Idler Rotary Shafts

Thread these shafts into a tapped hole to support idler sprockets and pulleys in tensioning applications.

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