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?


The same reason as having a live center in the tailstock, to hold
something. Three jaw and four jaw chucks with morse live centers on the
back side are common in shops doing large tubes or long hollow parts.

John