Belt Adjusters | McMaster-Carr

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Buckle Type

Material

Width

Roller Chain Trade Number

Component

For Maximum Belt Width

Attachment Type

Belt Type

For Maximum Webbing Width

3/4"

1 1/2"

Maximum Tension Force Rating

Weight Capacity

For Idler ID

Length

Tension Force

Mounting Position

Minimum Tension Force Rating

REACH

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

EAR99

RoHS

Compliant

Not Compliant

For V-Belt Cross Section

Housing Material

Thread Size

Finish

Strand Type

Mounting Plate Width

164 Products

Belt Tension Gauges

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

Ultrasonic Belt Tension Gauges

Check the tension of your machine’s flat, timing, or V-belt—no matter its width. These gauges use ultrasonic sound waves to take noncontact readings.

Tensioners for Chain and Belt Drives

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.

Floating Roller Chain Tensioners

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

Roller Chain Tensioning Rings

Install these rings between strands of chain to absorb slack without the need for realignment, lubrication, or tools—good for use in confined spaces where maintenance may be difficult.