Worm Wheel Bore Diameter 10 mm Bore Diameter Tolerance +/- 0.2 mm Bore Type Plain Face Width 12 mm Gear Shape H1 Hub Diameter 30 mm Hub Projection 10 mm Material Bronze Metric Module Pitch 1.5 Number of Starts 1 Number of Teeth 30 Outside Diameter 49.5 mm Overall Length 22 mm