Perfected performance on my centering vice

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Gary Beasley

Member
Joined
Sep 18, 2009
Messages
1,338
Location
Marietta, Ga. USA
Finally! I got my centering vice last year expecting great things from it. I checked my drill for squareness and set up the vice by clamping it around my 7mm bit then locking it down to the table. Even then I would get a hole that wandered a sixteenth of an inch to one side. The drill table was pinned to 90 degrees so I couldn't play much with that. Now I'd had to mount the vice to a larger sheet of 3/4 inch plywood to have a place to clamp down on, so I surmised that was where the error was creeping in if anything. Yesterday I finally decided to try shimming with tape on the bottom, shingling from 5 layers on one side to none on the other, visually checking the bit to the edge of the vice till it looked right. Got really close with the test holes. Then today I determined a little error front to back and added a couple of strips to the front edge, got it good! I drilled a couple of pieces for my son that was a little more than 3/8th inch kinda square and the holes line up dead center like it was supposed to in theory. I thought that was pretty good for drilling blanks barely bigger than the bushings on a 7mm pen.
 
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I just got that vise too. It works much better than what I was doing before. I mounted the vise to 3/4 birch plywood and got two of Woodcrafts magswicthes. I lower the bit, clamp the vise around the bit then engage the magnets. Centered. I haven't been at this long so some bits still wonder and some don't but I figure it out soon.

Jorge
 
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