Newsgroups: rec.crafts.metalworking
Subject: Re: tube bending questions
From: John De Armond
Date: Thu, 23 Sep 93 05:11:09 GMT

geoff@deepthnk.kiwi.gen.nz (Geoffrey Merryweather) writes:

>> Don't the springs go in the tube to keep it from kinking?  Has anyone treid
>> filling them with sand?

>  Abetter bet than sand to pack the inside of the tube is salt. You can then
>just pour hot water down the tube to get out any salt left inside after the
>bend is finished.

Not with chrome-moly or stainless unless you'd like a handful of 
chloride-induced stress cracking in a bit.  Chlorides and 
chrome bearing steels are a no-no.  Besides sand washes out just as
well as salt would.

John