I got some good info from John so I have wanted to make a vac chuck so I glued up some corian & here's what happened.
I am so pissed. I found one o-ring of the right size so I turned the whole thing & got the depth of the recess perfect & the o-rings fit exactly right. Then I drilled the thru hole of 3/8" then turned it around & used a spade bit of 7/8" (the biggest I had to the size of the bearings,) Then I was using my Ci1 mini easy rougher & just taking out dust when the dam thing exploded. was I pissed so I shut off the lights & figured I would make another one tomorrow
Click for full size