On 10 Oct 2005 20:18:47 -0700, with neither quill nor qualm,
quickly quoth:

They are balanced but the cast iron bases on a concrete floor just
don't provide enough coefficient of friction to make them stay put.

I need an interface material that grips concrete and cast iron.

Weld a stand-on plate to the bottom and put anti-skid matting
under it. Step on the plate to do the work, holding the whole
machine steadier.

The machinery is pretty good quality (ie mostly Baldor) but some of the
pedestals are Harbor Freight crap. (i don't mind buying Baldor buffers
and grinders but their pedestals seem too high priced for what you
get).

My deluxe HF stand has 3 bolt-holes and I could mount it to a piece of
plywood if I were so inclined. That could be anti-skidded, too.


I filled some of the pedestals with concrete to give them more mass. It
helps but there's just not enough friction between cast iron and
concrete when motors are spinning at 3600 rpm.

Yeah, mass always helps dampen vibrations. Add anti-skid shop matting
or some of the thicker shelf liner. (Don't get caught sneaking it out
of the kitchen.)


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