I needed to drill or preferably ream a hole of.210" down the centre of a part on the lathe. I don't have a .210 reamer but I did have a number drill of .209" so I assumed it would be "good enough" since drills usually go a little oversized. I carefully step drilled the hole finishing it with the .206, .208 and finally the .209 drills. OK bit over done on the drilling but I wanted it as close as possible. Unfortunately it didn't come out right, I can run a .209" drill through it bit a .209 gauge pin won't go through, the closest that will is the .206" pin. It turns out that the inside is sort of hour glass shaped, .209 on either end but only .206 in the middle.
I would have thought that was impossible. Anyone know how I pulled that one off?????????????????????????????
I would have thought that was impossible. Anyone know how I pulled that one off?????????????????????????????
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