Relative risk - Revision history

en>Wikirev54: end page number of reference 1 was corrected.

2015-01-06T12:00:22Z

end page number of reference 1 was corrected.

← Older revision		Revision as of 14:00, 6 January 2015
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	[~~[File~~:~~US Navy 030730-N-9455K-103 Seabees use a breaker bar to secure a bulldozer before transporting it to Camp Moreell from Camp Castle~~.~~jpg\|thumb\|[[Seabees]~~] ~~use a cheater bar to secure a bulldozer]]~~		Hi there, I am psychic solutions by lynne ([http://mybrandcp.com/xe/board_XmDx25/107997 mybrandcp.com]) Alyson Pomerleau and I think it seems quite great when you say it. For a whilst I've been in Alaska but I will have to move in a year or two. It's not a typical thing but what I like performing is to climb but I online psychics ([http://alles-herunterladen.de/excellent-advice-for-picking-the-ideal-hobby/ alles-herunterladen.de]) don't have the time lately. My working day job is an info officer but I've currently applied for an additional one.<br><br>my site :: real psychic readings ([http://203.250.78.160/zbxe/?document_srl=1792908 best site])

	~~A '''cheater bar''' or '''cheater pipe''' is an improvised [[breaker bar]] made from a length of [[pipe (material~~)~~\|pipe]]~~ and ~~a [[wrench]] (spanner)~~.

	~~==Primary use==~~
	~~Cheater bars are usually used to free [[screw]]s, bolts, and other [[fastener]]s that are difficult to remove with~~ a ~~[[socket wrench\|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 (physics)\|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:~~

	~~<math>\text{torque} = \text{radius} \times \text{force}</math>~~

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

	~~"CheaterBar" is the name of a torque multiplier~~ like ~~tool that~~ is ~~meant~~ to take the place of a pipe on a handle or handle extension concept. Named after the cheater bar, the "CheaterBar" is meant to take the place of the a fore mentioned pipe and is legal and appropriate for most industries. Through gear reduction, it is able to replicate the use of a pipe approximately 4X longer, fitting in a standard tool box.

	~~==Industrial safety problems==~~
	~~Problems in using such bars include:~~
	* 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.~~
	* The cheater bar itself can become part of a de facto catapult with the worker in the line-of-fire.<ref>[http://~~www~~.~~eh.doe.gov/paa/oesummary/oesummary2005~~/~~oe2005-03.pdf DOE \| Office of Health, Safety and Security \| Corporate Safety Analysis<!~~-- ~~Bot generated title~~ --~~>]</ref>~~
	* 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.<ref>[http:~~/~~/dme~~.~~digdnn.com/zone_files/petroleum_pdf/safety_alert015.pdf Using cheater bars on hand tools~~]~~</ref>~~
	* The use of the ~~cheater bar can result in component damage that can, in turn, harm workers~~.~~<ref>[http://pepei~~.~~pennnet.com/Articles/Article_Display.cfm?Section=Articles&ARTICLE_ID=240117&VERSION_NUM=2&p=6 Power Engineering - Valve Vigilance~~<~~!-- Bot generated title --~~>]<~~/ref~~>

	~~==Pump or fluid transport equipment problems==~~
	~~Ports of pumps can be damaged resulting in~~:
	* The outlet or inlet ports can be warped.
	* The pump casting or manifold can crack and then leak.

	~~Some organizations forbid their use. For example, [[NASA]] is one such organization~~:
	~~<blockquote>"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." <ref>~~http://~~server-mpo.arc.nasa.gov/Services/Proc/ProcDocs/APG1700.1-R/Chap%2014.pdf</ref></blockquote>~~

	~~==Alternatives==~~
	~~Due to the potential problems associated with a cheater bar, some situations may require an alternative to loosening and removing screws, bolts or other fasteners~~.
	* [[Impact wrench]] - An air powered [[socket wrench]] that delivers high torque output by storing energy in a rotating mass, then delivering it suddenly to the output shaft. ~~Nearly every auto body or mechanic shop will have an air compressor and impact wrench to loosen and tighten lug nuts on wheels~~. ~~<ref>[http:~~//~~home.howstuffworks.com/impact-wrench.htm How Does An Impact Wrench Work~~?~~]</ref> Most major tool manufacturers carry an air impact wrench, including DeWalt, Ingersoll, and Craftsman.~~
	* [[Torque multiplier]] - Uses a multi-stage [[epicyclic gearing]] mechanism to multiply torque output. Torque is applied to the input gear which engages with a number of planet gears which are held in a fixed planetary gear. By using a reaction arm, the outside casing of the multiplier is prevented from rotating, causing the planet gears to rotate around the input gear. Along with the multiplication of torque, there is a decrease in rotational speed of the output shaft compared to the input shaft. This decrease in speed is inversely proportional to the increase in torque. <ref>[http://www.torquetools.com/Torque-Products/Manual-Torque/multipliers/intro-to-torque-multipliers.html Introduction To Torque Multipliers]</ref> Torque multipliers come in a variety of output ratios as well.
	* [[Pneumatic torque wrench]] - Operates like the torque multiplier but is mated to a pneumatic air motor. It is essentially a mix of the compressed air powered impact wrench and the traditionally hand operated torque multiplier, delivering aspects of both tools.

	=~~=References==~~
	~~{{Reflist\|30em}}~~

	~~[[Category:Mechanical hand tools]~~]

en>Monkbot: Fix CS1 deprecated date parameter errors

2014-01-29T05:24:35Z

Fix CS1 deprecated date parameter errors

← Older revision		Revision as of 07:24, 29 January 2014
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	~~Hi there~~, ~~I am Sophia~~. ~~Ohio~~ is ~~where my home~~ is ~~but my husband desires us~~ to ~~transfer~~. ~~My working day occupation~~ is a ~~journey agent~~. ~~I am really fond~~ of to go to ~~karaoke but I've been~~ using on ~~new things lately~~.<br><br>~~Feel free~~ to ~~visit my blog~~ [http://www.~~youronlinepublishers~~.com/~~authWiki~~/~~AdolphvhBladenqq online psychic reading~~]		[[File:US Navy 030730-N-9455K-103 Seabees use a breaker bar to secure a bulldozer before transporting it to Camp Moreell from Camp Castle.jpg\|thumb\|[[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 (material)\|pipe]] and a [[wrench]] (spanner).

			==Primary use==
			Cheater bars are usually used to free [[screw]]s, bolts, and other [[fastener]]s that are difficult to remove with a [[socket wrench\|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 (physics)\|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:

			<math>\text{torque} = \text{radius} \times \text{force}</math>

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

			"CheaterBar" is the name of a torque multiplier like tool that is meant to take the place of a pipe on a handle or handle extension concept. Named after the cheater bar, the "CheaterBar" is meant to take the place of the a fore mentioned pipe and is legal and appropriate for most industries. Through gear reduction, it is able to replicate the use of a pipe approximately 4X longer, fitting in a standard tool box.

			==Industrial safety problems==
			Problems in using such bars include:
			* 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.
			* The cheater bar itself can become part of a de facto catapult with the worker in the line-of-fire.<ref>[http://www.eh.doe.gov/paa/oesummary/oesummary2005/oe2005-03.pdf DOE \| Office of Health, Safety and Security \| Corporate Safety Analysis<!-- Bot generated title -->]</ref>
			* 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.<ref>[http://dme.digdnn.com/zone_files/petroleum_pdf/safety_alert015.pdf Using cheater bars on hand tools]</ref>
			* The use of the cheater bar can result in component damage that can, in turn, harm workers.<ref>[http://pepei.pennnet.com/Articles/Article_Display.cfm?Section=Articles&ARTICLE_ID=240117&VERSION_NUM=2&p=6 Power Engineering - Valve Vigilance<!-- Bot generated title -->]</ref>

			==Pump or fluid transport equipment problems==
			Ports of pumps can be damaged resulting in:
			* The outlet or inlet ports can be warped.
			* The pump casting or manifold can crack and then leak.

			Some organizations forbid their use. For example, [[NASA]] is one such organization:
			<blockquote>"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." <ref>http://server-mpo.arc.nasa.gov/Services/Proc/ProcDocs/APG1700.1-R/Chap%2014.pdf</ref></blockquote>

			==Alternatives==
			Due to the potential problems associated with a cheater bar, some situations may require an alternative to loosening and removing screws, bolts or other fasteners.
			* [[Impact wrench]] - An air powered [[socket wrench]] that delivers high torque output by storing energy in a rotating mass, then delivering it suddenly to the output shaft. Nearly every auto body or mechanic shop will have an air compressor and impact wrench to loosen and tighten lug nuts on wheels. <ref>[http://home.howstuffworks.com/impact-wrench.htm How Does An Impact Wrench Work?]</ref> Most major tool manufacturers carry an air impact wrench, including DeWalt, Ingersoll, and Craftsman.
			* [[Torque multiplier]] - Uses a multi-stage [[epicyclic gearing]] mechanism to multiply torque output. Torque is applied to the input gear which engages with a number of planet gears which are held in a fixed planetary gear. By using a reaction arm, the outside casing of the multiplier is prevented from rotating, causing the planet gears to rotate around the input gear. Along with the multiplication of torque, there is a decrease in rotational speed of the output shaft compared to the input shaft. This decrease in speed is inversely proportional to the increase in torque. <ref>[http://www.torquetools.com/Torque-Products/Manual-Torque/multipliers/intro-to-torque-multipliers.html Introduction To Torque Multipliers]</ref> Torque multipliers come in a variety of output ratios as well.
			* [[Pneumatic torque wrench]] - Operates like the torque multiplier but is mated to a pneumatic air motor. It is essentially a mix of the compressed air powered impact wrench and the traditionally hand operated torque multiplier, delivering aspects of both tools.

			==References==
			{{Reflist\|30em}}

			[[Category:Mechanical hand tools]]

en>DrMicro: /* Tests */

2012-06-23T08:09:49Z

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