12-29-2013, 09:17 PM
Thanks Russ. Good idea.
Though I don't think I have more than two of any particular size drill, I do know I've got a dozen or so packages of 5 to 10 is sizes too small for this particular task. Because of the out-of-parallel condition of the stock, I could barely face it off and get the O.D. turned to a 1/2" length. I was holding onto perhaps a 1/4" or so for the first side, and had a lot of material to remove as the finished thickness is 11mm (.433") and the diameter needed to come down from 6" to just under 5".
When I turned it around the finish the second side, I had to gingerly turn that 1/4 off the face and there was holding onto a little bit more but had to reach inside the projecting top step of the inverted jaws. A bit scary.
I can just imagine that doing mostly one-off parts (like this one) I'd always need a different size drill, so I think I'll get some stock and grind some square/rectangular spacers.
Though I don't think I have more than two of any particular size drill, I do know I've got a dozen or so packages of 5 to 10 is sizes too small for this particular task. Because of the out-of-parallel condition of the stock, I could barely face it off and get the O.D. turned to a 1/2" length. I was holding onto perhaps a 1/4" or so for the first side, and had a lot of material to remove as the finished thickness is 11mm (.433") and the diameter needed to come down from 6" to just under 5".
When I turned it around the finish the second side, I had to gingerly turn that 1/4 off the face and there was holding onto a little bit more but had to reach inside the projecting top step of the inverted jaws. A bit scary.
I can just imagine that doing mostly one-off parts (like this one) I'd always need a different size drill, so I think I'll get some stock and grind some square/rectangular spacers.