Carbide Saw Blade Specification Manual: P.17 Carbide Tips: Hardness and/Or Grade
Hardness shall meet the industry rating of C-2, equivalent to 91.5 Ra (the Rockwell “A” scale) ± 1 point Ra.
Hardness testing requires a bench type instrument with a Rockwell “A” indenter and performed by qualified personnel. If equipment is not available, sample tips may be sent to a qualified testing facility, for evaluation.
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