29 Jan
2008
29 Jan
'08
9:01 a.m.
sometimes you have to make allowances for shrinkage.
Just something to keep in mind. There are books and
articles on this topic (look for oldies from TAB).
--- dwight elvey <dkelvey at hotmail.com> wrote:
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From: bobalan at sbcglobal.net
I have tried to make replacement rubber
rollers
for a Decision Data card punch machine. I first made
a mold from casting
resin then filed it with silicone RTV. Almost
worked. The problem
was that the original part I used to make the
mold
with had changed shape somewhat and I did not get a
symmetric part.
Hi Bob
Instead of using a rubber one, measure the diameter
and turn one with some
hardwood or aluminum. You'll get a nice concentric
one this way.
Dwight
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