O-ring - Revision history

Boilingleadbath: +link

2007-04-15T11:20:23Z

+link

← Older revision		Revision as of 06:20, 15 April 2007
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	Putting the O-ring on the exterior sleeve is not recommended, as it is harder to machine and tends to fall out if the interior part fails to press against it.		Putting the O-ring on the exterior sleeve is not recommended, as it is harder to machine and tends to fall out if the interior part fails to press against it.

			==External links==
			[http://www.oringsusa.com/ much info on 'rings]
			[[category:construction materials]]


	~~[[category:construction materials]]~~
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Saladtossser: spelling

2006-07-28T03:00:54Z

spelling

← Older revision		Revision as of 22:00, 27 July 2006
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	An o-ring seal, when done correctly, can hold thousands of [[psi]].		An o-ring seal, when done correctly, can hold thousands of [[psi]].

	For those with a lathe, the ~~procces~~ for machining an O-ring groove is:		For those with a lathe, the process for machining an O-ring groove is:
	<ol><li>Chuck the ~~workpeice~~ well, ensuring that it rotates true.		<ol><li>Chuck the workpiece well, ensuring that it rotates true.
	<li>Gently measure the ~~acctual~~ radial thickness of the O-ring.		<li>Gently measure the actual radial thickness of the O-ring.
	<li>Using a cut-off tool or similar tooling that will produce a deep flat bottomed cut, cut a groove of the proper width to a depth that will put a 5-10% squeeze on the O-ring.		<li>Using a cut-off tool or similar tooling that will produce a deep flat bottomed cut, cut a groove of the proper width to a depth that will put a 5-10% squeeze on the O-ring.
	</ol>		</ol>
	This depth can determined by the formula O*(100%-S%) - 1/2(OD - ID) Where O is O-ring thickness, S% is the percent of squeeze (higher percents make tighter O-ring seals), OD is the outside diameter of the interior part, and ID is the inside diameter of the exterior ~~sleave~~.		This depth can determined by the formula O*(100%-S%) - 1/2(OD - ID) Where O is O-ring thickness, S% is the percent of squeeze (higher percents make tighter O-ring seals), OD is the outside diameter of the interior part, and ID is the inside diameter of the exterior sleeve.

	Putting the O-ring on the exterior ~~sleave~~ is not ~~reccomended~~, as it is harder to machine and tends to fall out if the interior part fails to press against it.		Putting the O-ring on the exterior sleeve is not recommended, as it is harder to machine and tends to fall out if the interior part fails to press against it.


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Boilingleadbath: + machining grooves

2006-07-27T04:52:23Z

+ machining grooves

← Older revision		Revision as of 23:52, 26 July 2006
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	An o-ring seal, when done correctly, can hold thousands of [[psi]].		An o-ring seal, when done correctly, can hold thousands of [[psi]].

			For those with a lathe, the procces for machining an O-ring groove is:
			<ol><li>Chuck the workpeice well, ensuring that it rotates true.
			<li>Gently measure the acctual radial thickness of the O-ring.
			<li>Using a cut-off tool or similar tooling that will produce a deep flat bottomed cut, cut a groove of the proper width to a depth that will put a 5-10% squeeze on the O-ring.
			</ol>
			This depth can determined by the formula O*(100%-S%) - 1/2(OD - ID) Where O is O-ring thickness, S% is the percent of squeeze (higher percents make tighter O-ring seals), OD is the outside diameter of the interior part, and ID is the inside diameter of the exterior sleave.

			Putting the O-ring on the exterior sleave is not reccomended, as it is harder to machine and tends to fall out if the interior part fails to press against it.


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GalFisk at 11:36, 26 October 2005

2005-10-26T11:36:33Z

New page

[[Image:O-rings.jpg|frame|Some small o-rings]]An '''o-ring''' is a rubber gasket with a round cross-section, and is usually used to create an airtight seal around moving parts, such as pistons and bolts. O-rings are cheap and come in a wide range of sizes. However they need to be mounted in a precisely machined groove for most applications, and a [[lathe]] is usually needed to achieve this, so they are not always a viable option.

An o-ring seal, when done correctly, can hold thousands of [[psi]].

[[category:construction materials]]
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