Spiral point tap is what I have, as I notice the chips being pushed forward. Using it for a blind hole is time consuming & the necessity for pressurized air to clean the hole often, as well as drilling a deeper hole than necessary. Need to get a "spiral flute" tap for blind holes.
Gosh it's GREAT having a journeying machinist on the forums, learning lots. Thanx for taking the time to edumacate us.
