Ground Helical Gear Bore Diameter 15 mm Bore Diameter Tolerance H7 Face Width 16 mm Finish Black Oxide Gear Shape S1 Gear Type Helical Hub Diameter 36 mm Hub Projection 13 mm Material Alloy Steel Maximum Teeth Hardness 60 HRC Metric Module Pitch 2 Minimum Teeth Hardness 50 HRC Number of Teeth 22 Outside Diameter 48 mm Overall Length 29 mm