12-23-2014, 03:27 PM
(12-22-2014, 04:31 AM)Highpower Wrote: Call Numrich and ask them what material the new part is made from. I imagine it is most likely mild steel like the original and not a medium or high carbon steel. If you have to take off an eighth of an inch you are definitely going to need to case harden the sear surface afterward if the new part is a low carbon (mild) steel. The case isn't that deep even if it was hardened previously.
So I took a few strokes with a file across the "excess" portion of the part and it is clearly not hardened in any way. And that makes sense, as given the amount of material (1/8" may be a bit of overstatement, but not much) that needs to be taken off, any case hardening would no doubt be gone.
I was sending off to McMaster-Carr for some assorted stuff anyhow, so I added in a pound can of magic case hardening stuff. Probably still be worth the phone call to see if that is the way to go, but my guess would be that it's the same mild steel as the original. It would make sense, really.
I am off to St. Louis for a week or so for work right after Christmas, so this stuff will arrive here before I do. I'll have to come back to it them, I guess.
Once again, I appreciate the input.
-Al