Idler Tensioners | McMaster-Carr

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2,091 Products

Chain and Belt Tensioners

Adjustable-Screw Roller Chain and Belt Tensioners

Move the adjustment screw to precisely apply tension in a straight line

7 products

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

Maintain correct tension and control it in a 360° arc with the adjustable arm

5 products

Spring-Loaded Adjustable-Arm Roller Chain and Belt Tensioners

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

9 products

Adjustable-Arm Roller Chain and Belt Tensioners

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

9 products

Floating Roller Chain Tensioners

Mount directly on the chain drive and adjust straps to apply constant tension

21 products

Heavy Duty Spring-Loaded Roller Chain and Belt Tensioners

Maintain drive tension on large belt and chain drives

3 products

Ultra-Low-Profile Channel-Guided Roller Chain Tensioners

Install in low-clearance drives where tensioners must be less than 3" tall

2 products

Roller Chain Tensioning Rings

Absorb slack in confined spaces where maintenance may be difficult

13 products

Channel-Guided Roller Chain Tensioners

Built-in springs apply constant tension to buffer shock and ease vibrations

16 products

Low-Profile Channel-Guided Roller Chain Tensioners

Install in low-clearance drives where tensioners must be less than 4" tall

8 products

Other Products

Flat Belt Idler Pulleys

Spin freely on built-in bearings to reduce wear and vibration on flat belts

31 products

Timing Belt Idler Pulleys

Add to your timing belt setup to minimize vibration and keep belts from wearing out

24 products

V-Belt Idler Pulleys

Spin freely on built-in bearings to reduce wear and vibration on V-belts

14 products

Timing Belt Drive Pulleys

Pair with a timing belt to keep your drive system in sync

1,261 products

V-Belt Drive Pulleys

Pair with a V-belt to transfer motion from a rotating shaft

572 products

Flat Belt Drive Pulleys

Pair with a flat belt to transfer motion from a rotating shaft

25 products

Round Belt Drive Pulleys

Mount directly onto a shaft and pair with round belts to transmit rotary motion and torque

15 products

Round Belt Idler Pulleys

Spin freely on built-in bearings to reduce wear and vibration on round belts

21 products

Spur Gear Stock

Machine your own gears to an exact face width and shaft diameter

18 products

Timing Belt Pulley Stock

Machine your own timing belt pulleys to fit an exact width and shaft diameter

17 products