On Aug 30, 4:26 am, Nick Mueller wrote:
sk wrote:
I machined a replacement insert from O2 round stock, currently at Rc
20, will this last a few years without hardening?

Probably not.
The material should be shatter proof and corrosion resistant. Federal Mogul
hasvalveseats (and should have stock material to make your own).
If you can't get that, cast iron (not the softest one) should be a fix. If
it has nickel/chrome in it, the better.

Nick
--
The lowcost-DRO:
http://www.yadro.de
Thanks for your replies.

As this was the intake valve seat, I heated it with O-A torch and
quenched in oil, then heated to 400F for a half our to temper.
Looks like Rc 50. So far, it's got too much power. Really, I'm
digging a 12 x 24 foot hole next to the house with a long sloping
trench, as I was backing out, the wheels were spinning and digging out
to the point I was bottoming the machine. It's never had this much
power since I've had it. Throttle back and I can control this beast.
A pig farmer owned it before me, never fixed anything unless it would
not move. I can tell from all the abuse it's had. This is a 1972
Mity Mac made in Thief River Falls MN, and packaged for Geil ag.
equipment. I'm running out of summer here in Iowa, and it's got's to
keep working else I have a freeze and major problem as the water pipe
and sewer pipe are now exposed to freeze. I need to get a footing and
11 courses of concrete block laid and capped before the hard freeze
gets me.

Sk