Originally Posted by Madbob9  Well I still had no luck with the cobalt bits.After about 4 holes they would start to wander even with the spotted starter hole.So I grabbed the cheap $2 a piece carbide drills and punched 25 holes with one drill and no spot drilling.And that one drill is still cutting well.Surprised me.
Thanks for all the info guys.This is a great site. |
A $2 carbide drill is still a tad stiffer than the most expensive cobalt drill, especially when you start getting down to that size. I cross drill smaller that that with carbide drills in live tooling and no center drill. Just slow down the initial feed rate until you get a hole started. You have a small advantage as there is no "feel" on a cnc machine.
Glad you got it sorted out and working to your satisfaction. I agree...this is a good place to learn.