Cheater bar

Cheater bar
Seabees use a cheater bar to secure a bulldozer

A cheater bar or cheater pipe is an improvised breaker bar made from a length of pipe and a wrench (spanner).

Primary use

Cheater bars are usually used to free screws, bolts, and other fasteners that are difficult to remove with a ratchet or wrench alone. Cheater bars are also commonly used to operate valves.

When the handle of a wrench or ratchet is inserted into a cheater bar, the additional distance makes it possible to generate the required torque with the same amount of force being applied. However, the work done is the same with or without the cheater bar because the torque and angle of rotation needed to accomplish a particular task does not change.

The cheater bar allows higher torque with the same force by:

torque = radius \times force

A cheater bar is sometimes called a pipe extension or an extension pipe.

Industrial safety problems

Problems in using such bars include:

  1. If the component frees suddenly the worker can become a projectile that is propelled into whatever is in the "line-of-fire." This could (and has) resulted in falls, impacts, punctures, and other injuries.
  2. The cheater bar itself can become part of a de-facto catapult with the worker in the line-of-fire.[1]
  3. If the over-torquing results in the failure of any of the items in the jury rig the fragments can injure workers in the line-of-fire.[2]
  4. The use of the cheater bar can result in component damage that can, in turn, harm workers.[3]

Some organizations forbid their use. For example, NASA proscribes:

"Use the approved tool for the job. Makeshift arrangements such as the use of a screwdriver as a chisel, a pair of pliers as a wrench, a wrench as a hammer, or overloading a wrench by using a pipe extension (cheater bar) on the handle are not to be employed." [4] (emphasis added)

Notes


Wikimedia Foundation. 2010.

Игры ⚽ Поможем решить контрольную работу

Look at other dictionaries:

  • Breaker bar — A breaker bar is a long non ratcheting bar that is used with socket wrench style sockets. Breaker bars are often used to free stuck bolts and nuts. The additional length of a breaker bar allows the same amount of applied force to generate… …   Wikipedia

  • Five Guys Walk into a Bar... — Infobox Album | Name = Five Guys Walk into a Bar... Type = Box set Artist = Faces Released = July 20, 2004 Recorded = 1969 March 7, 1975 Genre = Rock Length = Label = Warner Bros. Records / Rhino Records Producer = Reviews = * Allmusic Rating|5|5 …   Wikipedia

  • Cheaters (disambiguation) — Cheaters may refer to: Cheaters, a weekly syndicated reality TV show in the US Cheaters (film), a 2000 TV movie starring Jeff Daniels and Jena Malone Cheaters (Will Grace), a two part episode of Will Grace The Cheaters, a short story by Robert… …   Wikipedia

  • Christie Brinkley — At the Tribeca Film Festival (April 25, 2007). Born Christie Lee Hudson February 2, 1954 (1954 02 02) (ag …   Wikipedia

  • Rachel Green — Infobox character name = Rachel Karen Geller (nee Green) caption = Rachel in Season 7 first = The Pilot last = The Last One age = 39 marital status = married(after series ended) other family = Monica Geller Bing (sister in law), Chandler Bing… …   Wikipedia

  • Infidelity — Relationships Types …   Wikipedia

  • Liar's dice — A set of Poker dice as used in Liar dice (individual hand). Liar s dice, or Liar dice, with roots originating in South America and popularized in early Spanish History, was brought to Spain by the Spanish conqueror Francisco Pizarro during the… …   Wikipedia

  • Stu Ungar — infobox poker player firstname=Stu lastname=Ungar nickname=Stuey, The Kid caption= hometown=New York City wsop bracelet count=5 wsop money finishes=15 wsop main event best finish rank=Winner, wsop main event best finish year multi year wsop… …   Wikipedia

  • Pinball — covered case called a pinball machine. The primary objective of the game is to score as many points as possible. Secondary objectives are to maximize the time spent playing (by earning extra balls and keeping the ball in play as long as possible) …   Wikipedia

  • Xbox Live — Developer Microsoft Type Online service Launch date November 15, 2002 …   Wikipedia

Share the article and excerpts

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