- Joined
- Aug 15, 2013
- Messages
- 2,107
I need to manually drill a 0.125 diameter hole 2 inches deep in 304 free machining stainless...... I then used a jobber length solid carbide drill, peck drilling roughly 0.100 per peck with cutting oil. I withdrew the drill every two or three pecks and added oil into the hole.The drill snapped at the top of the flutes at the same depth of the flutes.
Am I reading it right that the the top of the flutes are even with the top of the hole when the bit broke? I'm guessing about 1-1/2" deep? If so, would a bit with longer flutes help? Or maybe a gun drill if the project is worth the money to buy one? Or shorter pecks with a standard bit and blow the hole out with air or coolant between pecks?
Tom