- Joined
- Jun 7, 2013
- Messages
- 10,131
I'm thinking that if you set up a 30 tooth gear on the QC box and set the box up for 40 threads, you will get 30TPI; I have some notes on this, but try it and if it does not work I can dig through my notes and find it. I have done this on my lathe for such as 19TPI, using a 38 tooth change gear and setting the levers accordingly; when I was in business, I made a whole set of change gears to be able to do not only metric, but also diametral pitch and other special leads; it's a big pile of gears. I had found some charts related to the heavy duty Leblonds and it worked for the Regal as well.