Squre Threaded Bolt Design

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nbhide108 Commentator Join Date: Apr 2009 Posts: 67	Squre Threaded Bolt Design 05/27/2009 11:19 AM
	What is the procedure to design squre threaded bolts? Any data available for Axial Load carrying capacity & respective Square thread bolt size?
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TVP45 Guru Join Date: Jul 2007 Posts: 4448 Good Answers: 143	#1 Re: Squre Threaded Bolt Design 05/27/2009 1:29 PM
	Do you want the threaded part to be square? Can you provide any more details. A comprehensive answer would run into perhaps a 100 pages. __________________ "Well, I've wrestled with reality for 35 years, Doctor, and I'm happy to state I finally won out over it." Elwood P. Dowd
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ddk Guru Join Date: Jul 2007 Location: Minnesota Posts: 529 Good Answers: 15	#2 Re: Squre Threaded Bolt Design 05/27/2009 1:38 PM
	Have you looked into a Machinery's handbook for ACME thread info? Is that the type of square thread you're asking about? Are these metric or non metric threads? __________________ downhill slide to 112 (damn memor.)
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nbhide108 Commentator Join Date: Apr 2009 Posts: 67	#7 In reply to #2 Re: Squre Threaded Bolt Design 05/29/2009 3:11 PM
	Not checked yet. These are metric threads. thanks for suggestion.
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woodygb Power-User Join Date: Mar 2009 Location: United Kingdom Posts: 308 Good Answers: 28	#3 Re: Squre Threaded Bolt Design 05/27/2009 5:35 PM
	http://www.roymech.co.uk/Useful_Tables/Cams_Springs/Power_Screws_1.html Chase the links for equations and other useful data.
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PWSlack Guru Join Date: Jan 2007 Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on. Posts: 32175 Good Answers: 839	#4 Re: Squre Threaded Bolt Design 05/28/2009 3:35 AM
	Why are square-threaded bolts required? __________________ "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
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sb Guru Join Date: Mar 2007 Posts: 2550 Good Answers: 103	#5 In reply to #4 Re: Squre Threaded Bolt Design 05/28/2009 7:35 AM
	Simple More strength than the standard 60 or 55 deg thread at the pitch The reverse drive is locked (ie the rotation can give a axial thrust but axial thrust can not make it to rotate) the ACME or other low angle threads are used in the drive screws, jacks etc where these properties are critical. __________________ Fantastic ideas for a Fantastic World, I make the illogical logical.They put me in cars,they put me in yer tv.They put me in stereos and those little radios you stick in your ears.They even put me in watches, they have teeny gremlins for your watches
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nbhide108 Commentator Join Date: Apr 2009 Posts: 67	#6 In reply to #4 Re: Squre Threaded Bolt Design 05/29/2009 3:07 PM
	Applications is leg mounted tank which need level adjustment. I thaught square threaded bolts have more strength so want to use the same.
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ddk Guru Join Date: Jul 2007 Location: Minnesota Posts: 529 Good Answers: 15	#8 In reply to #6 Re: Squre Threaded Bolt Design 05/29/2009 4:34 PM
	How heavy is the tank? How level does it have to be? What are the distances between the legs? Most of the leveling devices that I've seen have used standard thread. Either coarse or fine series. But maybe your tank weighs too much. Square threads are stronger but they cost a lot more. __________________ downhill slide to 112 (damn memor.)
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nbhide108 Commentator Join Date: Apr 2009 Posts: 67	#9 In reply to #8 Re: Squre Threaded Bolt Design 05/29/2009 5:35 PM
	Diffferent tanks with varying weights from 2000 Kg to 10000kg (considering full of water weight). & Mouted on 3 or 4 legs of 50NB to 150NB LEG SIZE. Is it ok to provide coarse or fine series threads? If yes, how do i design?
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ddk Guru Join Date: Jul 2007 Location: Minnesota Posts: 529 Good Answers: 15	#10 In reply to #9 Re: Squre Threaded Bolt Design 06/01/2009 8:25 AM
	Some of the questions you need to find the answers to. 1. Is this a one time use? Only used during initial installation to insure that everything is level. 2. How level does it have to be? With 1mm? 10mm? 3. Do you expect a person to use a hand held tool to adjust the height? 4. Are these tanks being adjusted when they're empty or full? (I would guess when they're empty because it would be easier) 5. Are you using shims under the footpads to support the weight after the tanks are level? 6. Could you use a forklift or jib crane or some other means of raising the tank safely? 7. are you doing the leveling or are other people? If other people, you should talk with them to see how they would do it. 8. Figure out the compressive strength for different thread sizes, if you can use that method. Keep in mine that you want your method to be safe. __________________ downhill slide to 112 (damn memor.)
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ddk (3); nbhide108 (3); PWSlack (1); sb (1); TVP45 (1); woodygb (1)

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