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 How well does uhmw holds threads?

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Cody
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PostSubject: Re: How well does uhmw holds threads?   Thu Nov 26, 2009 9:14 pm

from what ive researched it doesnt take much to pull out the threads
everyone ive seen said to nuts and bolts or threaded nut bar
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PostSubject: Re: How well does uhmw holds threads?   Thu Nov 26, 2009 10:45 pm

uhmw is really soft, which means you need really coarse threads. Trilobular plastite screws probably work the best - they're self-tapping screws specifically designed for use in plastic, with a very coarse thread with a special profile for gripping plastic. Sheet metal screws will not work the same.


http://www.mcmaster.com/param/asp/PSearch2.asp?reqTyp=parametric&act=psearch&FAM=tappingscrews&FT_6145=249281&FT_6150=249512&sesnextrep=382452884329952&ScreenWidth=1440&McMMainWidth=1235

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PostSubject: Re: How well does uhmw holds threads?   Fri Nov 27, 2009 7:41 am

Alex,

Use an insert with a flanged back if you are going to thread UHWM..... It is too soft to thread directly into..... It is good for bolting through and into something else but I would not thread it directly...... use a flanged back something like a tee nut for wood and insert it through the plastic.... it will hold tight and not elong if tight

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