Angular Miter Gear Bore Diameter 14 mm Bore Diameter Tolerance H7 Bore Type Plain Face Width 8.5 mm Finish Black Oxide For Shaft Angle 120 Degrees Gear Shape B120 Hub Diameter 42 mm Hub Projection 20.64 mm Material Carbon Steel Material Grade S45C Maximum Teeth Hardness 194 HB Metric Module Pitch 2.5