<< I am not surprised. Things usually have to be finished ground after
 heat treating. I am not sure about the nitriding temp but as I recall
 it is only about 750 degrees F. That should not warp cast iron much.
 I am sure I can find a place here in LA to do it.

 Paul Lamar >>

BruceTurrentine@aol.com wrote:

It's not as much the distortion of part as it is the raising of the grain of
the iron. The last set I had re-nitrided had the surface texture of suede
leather before the second lapping. My new personal policy is that if the
housings will clean up in less than 005, I use them as is.
Bruce Turrentine

 
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