uxcell M1 Mod1 Pinion Gear Set, 5mm Shaft, 18T, 19T, 20T, 21T, 22T Motor Gears, Hardened Steel Pinion Gears with 3.17mm Coupler for RC Cars (Set of 5)

This universal Mod-1 pinion gear fits 5mm RC motor shafts. It comes with a 5mm to 3.175mm shaft coupler, making it suitable for RC cars, trucks, and more. Includes 18T, 19T, 20T, 21T, and 22T pinion gears, five grub screws, a 3.175mm (1/8") shaft coupler, and five hex wrenches. Made of carbon steel, the pinion gears are harder, stronger, and more resistant to deformation. The surface-hardened treatment makes them more wear-resistant, stronger, and less sensitive to notches, making them durable and reusable. Ideal for replacing pinion gears on devices. Note: The pinion gears have soft teeth and will not withstand excessive force. This universal Mod-1 pinion gear fits 5mm RC motor shafts. It comes with a 5mm to 3.175mm shaft coupler, making it suitable for RC cars, trucks, and more. Package includes: 5x 18T, 19T, 20T, 21T, and 22T pinion gears, five grub screws, and one hex wrench. Material: Made of carbon steel, the pinion gear has higher hardness, strength, and deformation resistance. Surface treatment: Surface hardening improves wear resistance, strength, and reduces notch sensitivity, making it durable and reusable. Note: The pinion gear's tooth surface is soft and cannot withstand excessive force.