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Old November 3rd, 2010, 01:31 PM   #20
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Originally Posted by whiterhino View Post
Flame hardened to what Rc hardness? What material is it and is it flame hardened or another heat treat process? Made right is flame hardening? Not necessarily. There is nothing wrong with flame hardening but it's not the best process. Most spline cutters can cut up into the mid 30's. Some as much as low 40's.

wrong its flame broiled
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