Straight tooth 81.4A orange red four-wheel drive straight tooth main shaft gear four-wheel drive gearbox transmission shaft gear (4pcs)

81.4A gear: 8 teeth, 1.4A means it fits tightly with a shaft with a diameter of 1.4MM. The hole diameter is about 1.35 mm
0.5 means module, the module of this gear is 0.5
Calculation formula of outer diameter of gear: Outer diameter = (number of teeth 2) * 0.5

81.4A gear
Hole diameter: 1.35mm
Diameter: 5mm
Height: 4.8mm