This is a video of myself hardening Le Frog’s front drive shaft I machined up two weeks ago. I am using EN8 steel, which is at the very limit of being able to harden. Fortunately I only want it a little bit harder than normal.
Le Frog’s progress can be seen here:
https://www.series2club.info/forum/index.php/topic,21152.240.html
Post time: Jun-23-2017