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From: "Jim Wilkins" <muratlanne@gmail.com>
Newsgroups: rec.crafts.metalworking
Subject: Re: A big ol' chunk of delrin
Date: Mon, 28 Apr 2025 18:16:53 -0400
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"Jim Wilkins"  wrote in message news:vu44rs$vrlu$1@dont-email.me...

I will soon try making a tool from a scrap of broken rock drill pipe, and
see how easy to saw and turn it is.
--------------------------------

It wears an HSS bit dull in a few minutes unless the lathe is in back gear. 
Annealing or tempering in the wood stove to at least 600F when I removed it 
from the tin can after the fire died down seems to have helped tool bit 
life.