Awl--

Sort of like a tension/compression tap holder, but better, if I can swing
it.

Picture a 1" tool holder of sorts, w/ a 1/2 x 1 bushing, w/ a 1/2" shaft in
the bushing, which I want to be able to slide in and out of the bushing.
Then, picture two ball bearing raceways, one on either end of the bushing,
except instead of allowing the shaft to rotate, it would allow the shaft to
slide in and out, like a linear bearing.

The bushing would actually have a few thou clearance on the shaft, and be
broached for a key, to keep the shaft from rotating, but still slidable on
the bearings.

What type of bearing would this be? It's not strictly linear, but two of
them spaced apart would perform the same function on a shaft. Any sources?

This set up, in a cat40 tool holder, w/ a compression spring, would allow a
pretty nice spring-loaded chuck for pressure-type c-sinking, engraving, etc.

TIA!
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Mr. P.V.'d
formerly Droll Troll