Type : 81 species no repeat containing standard gear, fan gear, rack, worm, pulleys, belts (20 belt count one kind)

Modulus : 0.5 

Hole Diameter :0.8, 1, 1.9,  2.05, 2.55, 3 

Material : POM Plastic

Tips :

(1) Gear diameter formula: gear outer diameter (addendum circle) = (number of teeth +2) * modulus

(2) If the axle of 2mm, you need to bear with gears, select gears 1.9mm hole;

If you need to loose with, that is, free to slide, select 2.05mm hole gear;

Namely: tight fit, choose a small 0.1mm hole gear, loose gear with a large selection of 0.05mm

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