Has anyone heard how expensive a FT lifter casting tree is as part of the manufacturing process? A lot. And even cooling during the process is critical. The lifter companies became only concerned with face hardness and made the issue worse thinking they were improving processes. Hochimin trail stuff.
Anyway the gradual even cooling of the lifter casting tree is what makes a quality lifter with the lifter face cooling first. Sets the acicular carbide? to the correct depth on the lifter face. Can't remember the depth 0.0200"?. Then you are ready to machine the radii. Or so I was told.
Normal hardness is RC55-62?
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