When a chuck is screwed onto the rotary table, it's worthwhile having some
type of mechanism to ensure that the chuck doesn't come unthreaded. The
regular hold-downs used for the Sherline vise are too large to hold the
large 4-jaw on the rotary table, so I made some that would fit.
I started with some 1-1/2" aluminum angle,
that was 1/8" thick. See the drawing below for measurements. I applied some
layout blue, and marked off the appropriate dimensions. Then I rough cut
everything using my metal bandsaw. A file was used to finish things off,
and I drilled the holes using my drill press.
Bigger...