David Paule
Well Known Member
I've been examining my #40 drill bits with a 10x magnifying glass, and it seems that there's quite a bit of variation in the accuracy of the grinding of their points. Enough that poorly-ground ones don't start drilling well at all.
This was from several packages of half a dozen each that I've got in a box.
Anyhow, if you want good holes, check those tips with a magnifier!
Dave
This was from several packages of half a dozen each that I've got in a box.
Anyhow, if you want good holes, check those tips with a magnifier!
Dave