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From: "Jim Wilkins" <muratlanne@gmail.com>
Newsgroups: rec.crafts.metalworking
Subject: Re: QCTP tool blocks
Date: Thu, 26 Sep 2024 21:35:35 -0400
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"Snag"  wrote in message news:vd4lvm$cvi6$1@dont-email.me...

   I'm using the new 3" chuck right now to machine a slug for a
veterinary syringe . I bought several at a yard sale with the idea of
using them as oilers . The oil turned the barrel seals to goo so I'm
machining an aluminum slug with an o-ring to replace the goo . Actually
it'll have two , one to seal the plunger shaft and one for the barrel .
-- 
Snag
Voting for Kamabla after Biden
is like changing your shirt because
you shit your pants .
------------------------------------

The type with a narrow-edged plastic piston that slightly expands the bore 
where it contacts seems OK with petroleum products like grease.

Hydraulic seals are made of Buna-N or nitrile rubber. Viton should also 
work.