RB wrote:
I have, from an estate sale, a nice new 1/2" keyed drill chuck mounted
to an MT2 live center. The chuck rotates on the center.

What purpose would something like this serve?

This set up is often used to true up small electric motor or
generator cummutators. One end of the shaft is held in the lathe's
chuck, the other by a chuck like the one you've described. The area
where the brushes run can then be resurfaced.

Pete

--
Pete Snell
Department of Physics
Royal Military College
Kingston, Ontario,
Canada
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Me fail English?! That's unpossible!

Ralph Wiggum