183A gear hole inner diameter 2.95MM 18 teeth single-layer main shaft gear diameter 10MM toy building block 0.5 module (4pcs)

183A gear: 18 teeth, 3A means it fits tightly with a shaft with a diameter of 3MM. The hole diameter is about 2.95 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

183A gear
Hole diameter: 2.95mm
Diameter: 10mm
Height: 2.7mm