[time-nuts] Machining some aluminum help!
csteinmetz at yandex.com
Mon Aug 7 11:35:34 EDT 2017
> For _forming_, one needs something very viscous, something that
> lubricates at very high pressures, at the yield strength of the
> material being formed.
I've had excellent results with STP oil treatment, by itself or with
added Tungsten disulfide. I frequently tap under power at 20-150 rpm,
using Tapmatic self-reversing tapping heads.
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