Drilling holes;

I had a bunch of holes to drill. 3/4 inch - .001 over - with location
within a few thousands in 1/8 thick cold rolled steel. To my surprise I
found a 3/4 center drill [ unaltered ] could be ran all the way through
the stock , getting just what I wanted. doing it in my vertical mill it
was much faster then I thought possible. It took awhile to get the knack
of slowing down the spindle as the hole got bigger. Richard
Reply to
Richard Hanley
Loading thread data ...
If you are trying to hold +/- 0.001 tolerance on the diameter you might want to drill ten thou undersized and then ream to final size with a one over 3/4 inch reamer.
Reply to
jim rozen

PolyTech Forum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.