I wasn't aware of the annealing trick when I designed and built the tapered gib mod several years ago. I anticipated the warping, however, as I knew about the internal stresses and what happens when the surface is machined away.
What I did was to machine from both sides of the brass stock, in small increments until I got it close. There was still warpage, so I set the machined gib on riser blocks on each end and used the mill quill as a press to bend the warp out each piece. This is described in my article on the Tapered Gib:
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If you have the means to heat your stock and anneal it as Mike describes, you can probably save yourself some extra machining steps and trouble.
Rick
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At 02:38 PM 3/11/2007, you wrote:
You need to anneal the brass before machining to take the internal
stress out of the brass bar. To do this simly heat the brass to dull
red heat and quench in water.
Kind regards
Mike
--- In 7x12minilathe@..., Pigi <pigi@...> wrote:
Hi all,
I'm not sure if this is OT, but I don't think, being that is lathe
improvement related.
I was trying to build the tapered gibs to improve my 7x10 lathe, but I'm
having problem ( lot of ) with the brass warpage.
When ever I give a pass with my mill, the brass gib become more and more
distorced.
So the question is: what could be the best way to machine those gibs to
reduce the warpage ?
T.I.A.
Pigi
