Screw Threads

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Anonymous Poster	Screw Threads 10/02/2010 2:02 AM
	how the screw threads of a screw jack are designed practically
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user-deleted-1105 Guru Join Date: May 2007 Location: Harlow England Posts: 16512 Good Answers: 670	#1 Re: screw threads 10/02/2010 4:03 AM
	Probably using standard thread forms and pitches established over years of empirical use and analysis. Del __________________ health warning: These posts may contain traces of nut.
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ozzb Guru Join Date: Mar 2007 Location: Rosedale, Maryland USA Posts: 5197 Good Answers: 266	#2 Re: screw threads 10/02/2010 7:11 AM
	look up acme threads __________________ Life is not a journey to the grave with the intention of arriving in a pretty, pristine body but rather to come sliding in sideways, all used up and exclaiming, "Wow, what a ride!"
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user-deleted-1105 Guru Join Date: May 2007 Location: Harlow England Posts: 16512 Good Answers: 670	#4 In reply to #2 Re: screw threads 10/03/2010 2:59 AM
	ACME... Aren't they the guys who make Wile E Coyote's Anvils?. Del __________________ health warning: These posts may contain traces of nut.
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ozzb Guru Join Date: Mar 2007 Location: Rosedale, Maryland USA Posts: 5197 Good Answers: 266	#5 In reply to #4 Re: screw threads 10/04/2010 8:32 AM
	Yep and everything else Wile bought. They even have a supermarket chain here on the east coast. __________________ Life is not a journey to the grave with the intention of arriving in a pretty, pristine body but rather to come sliding in sideways, all used up and exclaiming, "Wow, what a ride!"
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Doorman Guru Join Date: Apr 2009 Location: Yellowstone Valley, in Big Sky Country Posts: 7425 Good Answers: 295	#6 In reply to #5 Re: screw threads 10/04/2010 2:00 PM
	It is my inderstanding that ACME Corp. has closed their doors, pending resolution of the lawsuit, Wile E.Coyote (Plaintiff) -v- Acme Company (defendant). __________________ Semper Ubi Sub Ubi
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user-deleted-1105 Guru Join Date: May 2007 Location: Harlow England Posts: 16512 Good Answers: 670	#7 In reply to #6 Re: screw threads 10/05/2010 3:37 AM
	A welcomed chuckle this morning, having got into work to find the two projects I'm working on stalled because the custome keeps changing the spec', and in one case the customer is arguing amongst themselves. Del __________________ health warning: These posts may contain traces of nut.
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mike k Guru Join Date: Apr 2008 Location: Bristol, Tennessee Posts: 1177 Good Answers: 58	#3 Re: Screw Threads 10/02/2010 7:42 PM
	Like OZZB says, look up Acme threads. A good screw jack will have Acme threads. A screw jack does work, so the threads need to last under continuous load and motion. The flat nature of the thread directs the stress in the direction of the load. A normal thread will wear out sooner. __________________ mike k
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