SlickRockSpider
Rock Crawler
so its more to do with the feed rates and coolant, then the bit used. Makes sense.
I haven't tried it yet, but I know others have had trouble drilling and turning it.
Erin I had a thought about this last night. I use only drill bits meant for metal. Which means it take a smaller cut each time the drill bit rotates. If you or anybody uses drill bits for wood. The drill bit may be to aggressive. How do you tell? I will get some post pics. I buy all of my drill bits from a machine/tool catalog. (Enco, MSC) They are meant for steel.
Evan