75Pcs Plastic Gear Rack Pulley Gearbox Sets
75Pcs Single / Double Plastic Gear Motor Rack Pulley Gearbox Model Toy Car Auto Craft DIY Accessories Four-wheel Drive Robot Kit
- Hole Diameter:0.8,1,1.9,2.05,2.55,3
- Material:POM plastic
DIY knowledge guide:
- Gear diameter calculation formula: gear outer diameter (tooth top circle) = (number of teeth +2) * modulus
- If it is 2mm axis, with tight gear, please choose 1.9mm hole gear.
- With the loose gear, that is free to slide, please select the 2.05mm hole gear; In other words, tightly selected with a small 0.1mm hole gear, loose with a large selection of 0.05mm gear.