"Arch" wrote in message
...
An interesting discussion. I once tried to make a vacuum chuck from a
vacuum grip used to lift plate glass. I pulled the rubber diaphragm thru
the spindle hole. It didn't hold the vacuum because of leakage and no
way to continuously 'replace' the vacuum. I thought about some sort of
cam, like on a pumping lathe to keep repulling the diaphragm, but never
got roundtuit. IOW, I got what the little boy shot at! Why are y'all
not surprised?

Probably not commercially feasible, but in my ignorance I wonder why
integral compression/vacuum by vane, turbo or whatever that uses
circular motion hasn't been added to a lathe's headstock. Seems a waste
of a perfect setup. Has anyone done this at home?

By now, some of you are probably hoping that I'll try a poorly insulated
100,000 volt ion chuck. Oh well, derision, even flaming is acceptable,
but ignoring ain't.


Turn to Safety, Arch
Fortiter

======And just who took off for Maine ignoring the sensitivities of the
members of the rec.? Causing a Florida wide manhunt, a dragging of Lake
Okeechobee, and milk carton pictures, inter alia!8^(

Leif