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Search results with tag "Common drilling formulas"
Common Drilling Formulas - Guhring, Inc.
www.guhring.comCommon Drilling Formulas RPM RPM = vc x 12 3.14 x D or RPM = (3.8197 / D) x SFM (rev/minute) Cutting Speed vc = RPM x 3.14 x D 12 or SFM = 0.2618 x D x RPM