uxcell M1 Mod1 Pinion Gear Set, 5mm Shaft, 13T, 15T, 17T, 19T, 21T 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 13T, 15T, 17T, 19T, and 21T 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 frequency-hardened surface provides higher wear resistance, strength, and less notch sensitivity, 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. Universal Mod-1 pinion gears fit 5mm RC motor shafts. Comes with a 5mm to 3.175mm shaft coupler, suitable for RC cars, trucks, and more. Package includes: 5 each of 13T, 15T, 17T, 19T, and 21T pinion gears, five grub screws, and one hex wrench. Material: Made of carbon steel, the pinion gear has higher hardness, strength, and resistance to deformation. Surface treatment: Frequency-hardened parts have higher wear resistance, strength, and less notch sensitivity, making them durable and reusable. Note: The pinion gear has a soft tooth surface and cannot withstand excessive force.