How Long Does A Drill Bit Last?
How Long Does A Drill Bit Last between sharpening.
I'm thinking of making a cnc drill for repetitive drilling, I'll setup a coolant/lubricant feed.
As I see it the biggest problem may occur when a bit goes dull and the computer keeps trying to drill more holes. I can't think of any way for the cnc program to detect a dull bit. So I expect the bits need to be retouched before they dull off. But how long does a bit last?
Next question,
What is the name of the the twist drill bit that has a small centre drill on the cutting tip?