I made a simple modification to the hand wheel on a Jet 1642 lathe to adapt
it for Vacuum. I counter bored the aluminum wheel to accomodate a sealed
automotive bearing. I chose a bearing with an ID that was very close to
the OD of a common brass thread adapter at a local auto parts store ( ~ $
8.00 ). I simply epoxied the brass assembly into the bearing. The bearing
is retained in the handwheel with 2 set screws for easy removal for knock
out bar use when used for standard turning.

I salvaged the pump from a piece of industrial equipment that was being
scrapped. The control setup allows me to bleed air for vacuum adjustment
since this pump draws 26 in. Hg. I added a quick connect for additional
vacuum take-off for a future veneering vacuum press if I ever get aroung to
building one. For now it gets used to suck plastic beverage bottles flat to
make more room in the recycle bin. Sure is fun, but my wife thinks I'm
goofy.

It works very well and was a simple modification that has greatly extended
the versatility of this fine tool.