Worm Wheel Bore Diameter 8 mm Bore Diameter Tolerance +/- 0.2 mm Bore Type Plain Face Width 8 mm Gear Shape HA Hub Diameter 25 mm Hub Projection 8 mm Material Aluminum Bronze Metric Module Pitch 0.8 Number of Starts 1 Number of Teeth 60 Outside Diameter 49.6 mm Overall Length 16 mm