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Re: [Shop-talk] Separating copper

To: shop-talk@autox.team.net
Subject: Re: [Shop-talk] Separating copper
From: steve hochschild <shochschild@att.net>
Date: Tue, 11 Sep 2012 12:01:44 -0500
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References: <OF67DCE584.8ADFDA2C-ON85257A76.003D2A75-85257A76.003D74FC@mail.megageek.com> <001e01cd9028$4d73aad0$e85b0070$@cablespeed.com> <53C2E2D5E2E64ED78BAE0AFD3EC65CCA@CGI.COMMTECH>
User-agent: Mozilla/5.0 (Windows NT 6.1; rv:15.0) Gecko/20120824 Thunderbird/15.0
In my experience, this doesn't really work for copper -- it transfers 
heat so quickly the delta between the inner and outer only lasts for a 
nanosecond, too fast for expansion to expand.

On 9/11/2012 11:57 AM, Mark Endicott wrote:
> How about freezing the joint to shrink it then heating the outside 
> piece quickly with a small jewelers torch to try to expand the outer 
> collar while the inner is still cold?  Eric, you probably have some 
> liquid nitrogen available don't you?  Maybe the expansion and 
> contraction would break it loose.
>
> Mark
> Nashville
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