Description Steel Gear Module 1 Incl. grub screw The hubs of the gear are equipped with two internal threads M4, with the supplied grub screws, a frice-locking connection between gear and shaft can be made. Technical Data: Number of Teeth: 40 Bore (s): 6 mm Material: Steel Module Type: 1 Hub Diameter: 14 mm Hub Length: 6 mm Product Dimensions, Diameter: 42 mm Tooth Width: 5 mm