- Joined
- Oct 16, 2017
- Messages
- 341
I always wanted one of these. MrPete222 shows us how to make it. Mine is a slight variation by having the cup for taps without a centering hole on the same pin. I wound the spring from 0.055" music wire. The pin and body are O1 quenched and tempered. The R-8 chuck for my mill is 3/8" so the body is stepped for 3/8" and 1/2" chucks. The set screw is timed such that when snug falls just short of the flat. Travel is 7/8".