Re: A big ol' chunk of delrin

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Sujet : Re: A big ol' chunk of delrin
De : muratlanne (at) *nospam* gmail.com (Jim Wilkins)
Groupes : rec.crafts.metalworking
Date : 21. Apr 2025, 22:06:54
Autres entêtes
Organisation : A noiseless patient Spider
Message-ID : <vu6c21$31to7$1@dont-email.me>
References : 1 2 3 4 5 6 7
User-Agent : Microsoft Windows Live Mail 16.4.3505.912
"Snag"  wrote in message news:vu63mc$2qjrd$1@dont-email.me...
   The problem with that is that I'm not certain what the thread profile
is - probably acme but ... I was just thinking that I can make an
impression of the leadscrew , wax might work or clean the leadscrew well
and apply a release compound and mold one out of JB weld ... and use
that impression to grind a cutter . That piece of plastic is dialed in
on my 4 jaw , and ain't coming out just yet .
--
Snag
---------------------------------
An old way was to fit a piece of thin sheet metal into the leadscrew grooves, holding them up to the light to see gaps to remove, like restoring a wood chisel or plane blade with a square. Another was to press sheet lead into the thread or gear teeth. When you have a light-tight match you measure the angle and grind the bit to it, perhaps narrower so you can adjust the depth and width separately to fit. I made a fly cutter to mill an ANSI involute spline broach by cut and try.
Polymer clay works well to copy shapes, such as your partly cut thread. It hardens when moderately heated and can be cut into a flat template. I didn't find a cheaper lubricant-filled alternative to Moglice, Rulon etc. though some suggested JB Weld.

Date Sujet#  Auteur
19 Apr 25 * A big ol' chunk of delrin26Snag
19 Apr 25 `* Re: A big ol' chunk of delrin25Bob La Londe
20 Apr 25  `* Re: A big ol' chunk of delrin24Snag
21 Apr 25   +* Re: A big ol' chunk of delrin22Jim Wilkins
21 Apr 25   i+* Re: A big ol' chunk of delrin15Snag
21 Apr 25   ii+- Re: A big ol' chunk of delrin1Jim Wilkins
21 Apr 25   ii`* Re: A big ol' chunk of delrin13Clare Snyder
21 Apr 25   ii +* Re: A big ol' chunk of delrin11Snag
21 Apr 25   ii i+* Re: A big ol' chunk of delrin8Joe Gwinn
21 Apr 25   ii ii+* Re: A big ol' chunk of delrin3Jim Wilkins
21 Apr 25   ii iii`* Re: A big ol' chunk of delrin2Joe Gwinn
21 Apr 25   ii iii `- Re: A big ol' chunk of delrin1Jim Wilkins
21 Apr 25   ii ii`* Re: A big ol' chunk of delrin4Snag
22 Apr 25   ii ii +- Re: A big ol' chunk of delrin1Jim Wilkins
22 Apr 25   ii ii `* Re: A big ol' chunk of delrin2Joe Gwinn
22 Apr 25   ii ii  `- Re: A big ol' chunk of delrin1Snag
21 Apr 25   ii i`* Re: A big ol' chunk of delrin2Jim Wilkins
21 Apr 25   ii i `- Re: A big ol' chunk of delrin1Snag
23 Apr 25   ii `- Re: A big ol' chunk of delrin1Snag
28 Apr 25   i`* Re: A big ol' chunk of delrin6Jim Wilkins
2 May 25   i `* Re: A big ol' chunk of delrin5Mike Spencer
2 May 25   i  +* Re: A big ol' chunk of delrin3Snag
2 May 25   i  i`* Re: A big ol' chunk of delrin2Jim Wilkins
2 May 25   i  i `- Re: A big ol' chunk of delrin1Jim Wilkins
4 May 25   i  `- Re: A big ol' chunk of delrin1Jim Wilkins
21 Apr 25   `- Re: A big ol' chunk of delrin1Bob La Londe

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