Strap wrench

Strap wrench

A strap wrench is any of various types of wrench that grip an object via a strap or chain being pulled in tension around it until it firmly grips. High static friction keeps it from slipping.

Many strap wrenches have built-in handles. Others are made to receive the square drive of a ratchet wrench.

The strap or chain can have various forms. Some straps are made of polymers, and are smooth, highly flexible, non-marring, high-friction straps. (Before the era of commercial polymers, the straps were of leather or rubber.) Other straps are bands of spring steel, moderately flexible, slightly firmer and more likely to mar than the polymer variants. The chains tend to be of the roller chain type (like a bicycle chain).



Oil-filter wrenches

Many oil-filter wrenches are of the strap type. Others are of the socket type or the pliers type.

Chain whips (e.g., for bicycle work)

A chain whip is a tool used to tighten and loosen threaded sprockets on a bicycle. (It is similar in form to a weapon of the same name.) It is called a chain whip because it has a short section of chain used to grip the sprocket. An alternative method to tighten sprockets is the rotafix method, which uses no tools.

Piston-ring compressors

Piston-ring compressors are strap wrenches that evenly squeeze (compress) the piston rings around a piston long enough to slide it into a cylinder. They look a lot like an oil-filter wrench of the strap type.


Wikimedia Foundation. 2010.

Look at other dictionaries:

  • strap wrench — A tool for loosening and tightening round or irregularly shaped objects such as oil filters, featuring a strap which is wrapped around the object, and a lever or key by means of which the object is turned …   Dictionary of automotive terms

  • Wrench — For other uses, see Wrench (disambiguation). A set of chrome vanadium metric wrenches, open at one end, box/ring at the other. This type is commonly known as a combination wrench. A wrench or spanner is a tool used to provide grip and mechanical… …   Wikipedia

  • wrench — [1] A device for removing nuts, bolts, and other fasteners. [2] A colloquial term for a mechanic or someone who is handy repairing engines. [3] To use a wrench tool. See adjustable wrench Allen wrench box wrench brake adjusting wrench brake… …   Dictionary of automotive terms

  • Monkey wrench — For other uses of this term, see monkey wrench (disambiguation). The monkey wrench (also known as an adjustable spanner in the UK) is an adjustable wrench, a later American development of eighteenth century English coach wrenches. It was popular… …   Wikipedia

  • Oil-filter wrench — Chain type oil filter wrench. The chain is wrapped around a spin on oil filter, and the hexagonal bar is turned anticlockwise to grip and unscrew the filter …   Wikipedia

  • Lug wrench — Lug Lug (l[u^]g), n. [Sw. lugg the forelock.] 1. The ear, or its lobe. [Scot. & Prov. Eng.] [1913 Webster] 2. That which projects like an ear, esp. that by which anything is supported, carried, or grasped, or to which a support is fastened; an… …   The Collaborative International Dictionary of English

  • oil filter wrench — A special automotive tool for the removal and installation of oil filters; they come in a variety of shapes, e.g., as strap wrenches, chain wrenches, or special cup style end cap oil filter wrenches …   Dictionary of automotive terms

  • Nail gun — Pneumatic nail gun in use A nail gun, nailgun or nailer is a type of tool used to drive nails into wood or some other kind of material. It is usually driven by electromagnetism, compressed air (pneumatic), highly flammable gases such as butane or …   Wikipedia

  • Hoe (tool) — For other uses, see Hoe (disambiguation). Azada redirects here. For video game by Big Fish Games, see Azada (video game). A person uses a hoe to cultivate vegetables. A hoe is an ancient and versatile agricultural tool used to move small amounts… …   Wikipedia

  • Adjustable spanner — From the bottom: 1. The first adjustable spanner f …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.