Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

There will be more to come, but for now I am caught up on this project. I ended up with a carbide spiral point "gun tap", appropriately named as it shoots the chips downward and out the bottom of the hole. Ran the speed at 350 rpm and some tapping paste , and never broke a tap. My "shars" tapmatic tool worked flawlessly, once i figured out the right torque setting.
crazydoug