Ive just remade a 4mm section key to fit the end of my lathe leadscrew for attaching changewheels. I had to make it from mild steel and file it to an exact fit as I'm not sure if the key was originally slightly undersize or the shaft keyway was a little oversize (it hasn't had too much use eitherway, so shouldn't be wear & tear!) so needed to make the new key minutely oversize, rather than just use 4mm stock. Question is - should I case harden it (with Casenit) before use, or do you reckon it will last OK without?
- posted
14 years ago