09-12-2015, 10:26 PM
Interesting, I always thought drill shanks were too soft for use as cutting tools (and the flutes too hard to do anything without a grinding wheel.) I learned yet another new thing! Thanks Rob!
I would have gone through the expense of buying a cutter on eBay, then wait. There's a million of them there, but an awful time figuring sizes if the seller doesn't give the actual measurements because the American numbering system is a weird three digit thing that changed in the mid 20th century. If the seller says it's a "604" you may not know if its the old or new number. I should just get a 30º milling cutter and make them!
I would have gone through the expense of buying a cutter on eBay, then wait. There's a million of them there, but an awful time figuring sizes if the seller doesn't give the actual measurements because the American numbering system is a weird three digit thing that changed in the mid 20th century. If the seller says it's a "604" you may not know if its the old or new number. I should just get a 30º milling cutter and make them!