I was making small diameter pins from Drill Rod (not drill blanks) and needed a reamer to fit them so I headed for the MSC Catalog.
It turns out that #10 Drill Rod (W-1, 0-1) is .191", but a #10 Drill or Reamer is .1935, but a #11 Drill or Reamer is .191".
What's up with that?
For some silly reason I thought that #10 Drill Rod would be the same size as a "10 Drill or Reamer!
Upon further investigation, very few of the designated drill rod sizes for wire sizes coincide with designated equivalent drill/reamer sizes. I've checked every catalog I can find, all with the same results. Fractional and Letter sizes all coincide.
Anyone know why that is?