08-20-2013, 08:03 PM
Through hole and power tapping mean spiral point or gun tap to me. The cuttings are forced ahead of the tap and don't break up and get caught in the flutes. I power tap as Tom described.
Busy Bee 12-36 lathe, Busy Bee Mill drill, Busy Bee 4x6 bandsaw, Homemade 9x17 bandsaw, Ad infinitum.