Wrench

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lock (or spanner outside North America) is a tool used to provide grip and mechanical advantage in applying torque to change objects - usually swivel fasteners, such as nuts and bolts - or prevent it from spinning.

At Commonwealth English (excluding Canada), is the standard term. The most common form is called open spanner and ring spanner . The term key is commonly used for tools that change non-binding devices (eg wrenches and pipe locks), or can be used for wrench - adjustable wrenches.

In North American English, wrench is the standard term. The most common form is called open-end wrench and box-end wrench . In American English, refers to a special wrench with a series of pins or tabs around the circle. (This pin or tab goes into a hole or notch cut into the object to be played.) In American trade, such a wrench can be called a passkey to distinguish it from the English flavor > spanner .

Higher quality wrenches are usually made of chrome-vanadium alloy steel and often drop-forged. They are often chrome-plated to resist corrosion and to facilitate cleaning.

Hinged instruments, such as pliers or tongs, are generally not considered wrenches in English, but exceptions are the plumbing wrench (UK plumbing locks) and the English Mole key (sometimes Mole's engagement in English English).

The word can also be used in slang to describe unexpected obstacles, for example, "He throws a wrench into our plan" (in English U.S., "wrench monkey").

Video Wrench

History

Wrenches and apps using wrenches or devices that require spanners, such as pipe clamps and armor, have been noted by historians as far back as the 15th century. Adjustable coach wrenches for strange sized wagon nuts were manufactured in England and exported to North America in the late 18th and early nineteenth century. The mid-19th century began to see a patented wrench using screws to narrow or widen the jaw, including a patented monkey wrench.

Most key ends of the box are sold as 12 dots because of 12 wrench points above both 12 dots and 6 bolt points. The 12-point wrench also offers a higher number of engagement points above 6 points. However, 12 wrench points have been known to round off 6 bolt points as they provide fewer contact space.

Maps Wrench

Type

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Other key types

This type of lock is not physically classified as spanner by English speakers, but functions similar to the wrench function.

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Size size

Sizes are usually determined by dimensions such as intercapacity spacing (size with six sides). In the 19th and early 20th centuries, it was common to determine the nominal size of the wrench according to the nominal size of the screw thread intended for joint use. Modern practice uses the designation of the size based on the distance between the sites, whether measured in metric or inch units.

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References

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External links

• Definition of Wrench dictionary in Wiktionary
• Media related to English Key in Wikimedia Commons
• Spanner Jaw Size Additional background information and spanner jaw size table.
• Whitworth/BSF/AF conversion chart and metric spanner key and lock size

Source of the article : Wikipedia