In article ,
"Paul Gilbert" wrote:

I just purchased a 3/4 HP vacuum pump and would like to hard wire it up to
220V power. The shock came when the big box stores don't sell double pole
single throw (DPST) switches and Grainger's motor starters start over $100.
I can always leave it at 120V, but there must be a better way! Anyone know
where I can get a 220V switch for $15? Now I am a chemist, not an
electrician. I assume that I need a double pole switch. Is that correct?

Second question: All of the rigs I have seen for vacuum chucks are, shall
we say, not quick change insulations. To change to a spur drive and the
knock out associated with that drive requires dismantling the vacuum
apparatus. My lathe is a PM 3520. Does anyone have a quick change plan
that could be adapted to this lathe?

Check an electrical supply store. Or online, or maybe Radio Shack