HS257 Multi-start threading 2tpi 2start – Part 2

A two part topic, cutting a 2tpi 2start thread on a Harrison 140 metric lathe. The coarsest threads the lathe will cut as standard are 7mm metric pitch or 4tpi imperial so I had to figure out a new gearing setup and then find the best method to cut multi-start threads. I mention multi-start threading quick machining tips by Stuart de Haro on his channel https://www.youtube.com/watch?v=awScHoNS_jo