Tensioners | McMaster-Carr

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Tension Force

Extended Length @ Maximum Load

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24,015 Products

Most Likely Products

Chain and Belt Tensioners

Control tension on your roller chain or belt for smooth operation and a long service life

87 products

Turnbuckles

Twist the body or end fittings to adjust the length and tension of attached rope and chain

746 products

Idler Shafts

Support idler sprockets and pulleys in tensioning applications

28 products

All Results

Power Transmission

Chain and Belt Tensioners

Control tension on your roller chain or belt for smooth operation and a long service life

87 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

Timing Belt Drive Pulleys

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

1,261 products

Timing Belts

Keep your drive system in sync with teeth that mesh with matching pulleys

1,638 products

V-Belt Idler Pulleys

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

14 products

V-Belt Drive Pulleys

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

583 products

Roller Chain Pullers

Keep roller chain in place while you add or remove links

4 products

Flat Belts

Transmit high-speed rotary power; best for shafts that are aligned

120 products

Flat Belt Drive Pulleys

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

25 products

V-Belts

Wedge-shaped grooves adjust for misalignment while transferring power from a rotating shaft

1,412 products

Round Belt Idler Pulleys

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

21 products

Round Belt Drive Pulleys

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

15 products

Timing Belt Pulley Stock

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

17 products

Round Belts

Flexible to send rotary power between unparallel shafts

316 products

Idler Shafts

Support idler sprockets and pulleys in tensioning applications

28 products

Rotary Shafts

Pair with gears, sprockets, and bearings to transmit rotary motion

1,770 products

Linear Shafts

Pair with linear bearings to reduce friction in manual and automated systems

1,318 products

Extension Springs

When stretched, springs pull their ends back together

4,736 products

Compression Springs

When squeezed, springs push back to their original length

2,792 products

Torsion Springs

Wrap around a shaft or rod to maintain pressure on objects as they rotate

560 products

Strip Springs

Wrap around a shaft and extend to pull objects in a linear direction

77 products

Rotor Springs

Wind to store power, then release to create rotary motion—similar to winding a wristwatch

10 products

Disc Springs

Maintain tension and separate components on shafts, under bolt heads, and at the ends of valves

1,680 products

Linear Wave Springs

Absorb vibration and fill in gaps along the length of an object

22 products

Spring Assortments

Keep extension, compression, and torsion spring types of various sizes on hand

7 products

Garter Springs

Exert radial force from all directions to maintain pressure on shafts or in seals

74 products

Die Springs

Support heavy loads with minimal compression in high-impact jobs such as punching and stamping

484 products

Made-to-Order Compression Springs

If you can't find the exact size spring you need, we'll get it made for you

80 products

Constant-Force Retractors

Attach an object and the spring controls tension as the object is slowly pulled out and back

23 products

Gas Springs

Support the weight of doors, hatches, and lids to assist opening and closing

812 products

Torque Limiters

Keep torque at or below a set limit to control tension or braking or protect machinery from overload

112 products

Brakes

Control how much and how quickly your drive system slows down

7 products

Motor Mounts

Adjust motor positions in belt-driven systems to increase efficiency and reduce wear on components

34 products

Electric Motors

Keep machinery and equipment moving with AC or DC power

12 products

Connecting Rods

Use with rod ends and swivel joints to link components in push/pull assemblies

332 products

Spur Gears and Racks

The simplest type of gear for transferring motion, with straight, parallel teeth

18 products

Gear Box Shafts

Convert output drives from female to male

10 products

Material Handling

Turnbuckles

Twist the body or end fittings to adjust the length and tension of attached rope and chain

746 products

Cable Pulling Clamps

Maintain tension until a line can be permanently anchored

11 products

Conveyor Belt Take-Up Frames

Adjust the tension on conveyor belts by extending or retracting pulleys

28 products

Conveyor Belt Take-Up Bearings

Use with take-up frames to adjust tension on conveyor belts

14 products

Conveyor Belt Idler Pulleys

Keep chain belts moving without sagging

8 products

Load Binders

Reduce slack in rope, straps, and chain to ensure a secure fit around loads

12 products

Ratchet Straps

Connect to anchor points and tighten incrementally to increase the tension, holding cargo in place

633 products

E-Track Straps

Add to E-Tracks to keep cargo from shifting inside vans and trailers; also known as logistic straps

16 products

L-Track Straps

Attach to L-Tracks and ratchet the buckle to tighten around cargo; also known as logistic straps

4 products

Ratchet Strap Webbing Bags

Bundle excess webbing to keep it from dragging and becoming a hazard or being damaged

1 product

Seismic Bracing Straps

Keep heavy equipment from tipping during an earthquake with ICC certified straps

4 products

Strapping Tensioners

Draw strapping tightly around packages with the push of a lever to keep contents secure

19 products

Strapping Tensioners/Sealers

Tighten strapping around packages and seal it in place with a single tool

11 products

Strapping Sealers

Crimp clips onto strapping to hold it tight

23 products

Strapping

Secure pallet loads, crates, and packages for transit

138 products

Winches

Wind up and let out rope, chain, and webbing for lifting and towing

79 products

Tool Balancers

Minimize user fatigue by suspending tools to offset their weight

42 products

Ratchet Pullers

Ratcheting action creates the pulling power of a winch in a versatile, portable tool

31 products

Cinching Straps

Tightly grip large bundles of cargo and other materials to secure them in place

65 products

Cable Tie Tensioners

Tighten cable ties and trim the excess

21 products

Measuring and Inspecting

Belt Tension Gauges

Check belt tension to minimize vibration, noise, and slippage

16 products

Force Gauges

Test objects to see how much tension and compression force they can bear

109 products

Coordinate Measuring Machine Fixture Clamps

Keep workpieces in place for hands-free measuring and inspecting

28 products

Fastening and Joining

Hanger Bolts

Suspend pipe and other fixtures with wire or cable ties

65 products

Washers

Nearly every size and shape imaginable, from flat washers to clipped to curved

41 products

Fluid Handling

Hose Clamp Installation Tools

Tighten hose clamps over hose and fittings to secure them

23 products

Hose and Hose Fittings

Flexible and stronger than tubing; often used to convey liquids and gases under pressure

1,125 products

Hose End Safety Straps

Wrap around the levers on cam-and-groove hose fittings to prevent accidental release and spills

3 products

Communication

Hose Identification Bands

Color code hose and tube lines to identify them at a glance

2 products

Fabricating and Machining

Springs for Locking Pliers

Change out worn or broken springs in the handle of your locking pliers

6 products

Containers, Storage, and Furniture

Strapping Dispensers

Keep strapping coils neat and ready to use

18 products