Making a Form Tool (and a little home shop hardening)

This week I machined up and hardened a lathe form tool to cut a radius for my next project. I used O1 tool steel. Have you ever wondered why O1 is one of the easiest tool steels to harden in the home shop? It has to do with carbon content, and to get a better understanding of why I draw a phase diagram for steel - on camera! Music: Where it goes by Jahzzar used under a CC-BY-SA license: https://creativecommons.org/licenses/...