80 teeth plastic gear 802A gearbox making toy car gear bag DIY robot parts motor gear（4pcs）

Number of single-layer teeth: 80 teeth
Module: 0.5 module
Aperture: 1.9mm (tight fit 2mm)
Tooth circle diameter: 41mm
Gear thickness: 3.3mm

Single gear, also known as spur gear
Modulus: 0.5
Gear outer diameter = (number of teeth + 2) * 0.5 (unit mm)
For example: 202A-2A means that the number of teeth is 20 teeth and the gear aperture is 2 mm. A means that it fits closely with the 2mm shaft. If it is B, it is loosely matched with the 2mm shaft.