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EP also sells equipment tooth measuring products known as equipment gauges! Gear gauges lessen mistakes, saving time and funds when identifying and purchasing gears. These pitch templates have 9 teams to decide all common pitch sizes: Diameter Pitch “DP”, Circle Pitch “CP”, Exterior Involute Spline, Metric Modulus “MOD”, Brief Tooth, Good Pitch, Coarse Pitch and Extraordinary Pitch .