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Old 02-22-2006, 02:09 AM
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Re: Machining Discussion-Lathes, Mills, CNC.

giovanni,
from your description it sounds like you're simply trying to turn the metal down to too small of a diameter, unsupported. The force of the cutter is actually collapsing the diameter of the metal. Try using a follower to help with the smaller stuff. Also using collets (as opposed to a 3 or 4 jaw chuck) will help support the really tiny stuff. I've been able to machine valve stems in 1:24th scale using collets and carbide tipped cutters.

hth,
Bill
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