How to drill hole on the spur gear?
I been trying to drill holes on the mugen spur gear,to lighten it up.Notthing sings to be work.That gear is just soo hard,and kill the bit almost right a way. I have tryed diff kind of bits what I could find in hardware and tool stores .I am using drill press with low rpm plus using cooling cut fluid to.I wondering if anybody knows what is the right way or the right bit .thanks!