Power Tool Consumables -2x 0.5 Module 40 Teeth Brass Worm Gear Wheel Worm Gear Shaft Kits Highlights Generic Brand 2x 0.5 Module 40 Teeth Brass Worm Gear Wheel Worm Worm Gear Shaft Kits Description: 0.5 Mod Brass Worm Gear Wheel + Gear Shaft Set. The worm shaft transmission structure is simple, compact, small in volume and light in weight. Worm Shaft Z1 = 1, turn a turn of worm gear teeth, can achieve a large gear ratio, generally in the power transmission, the gear ratio I = 10-80, such as a large gear transmission, if used with gear transmission, will have to take the multi-stage transmission. The selection of high-quality materials, careful processing create a high-quality product. Made of brass, long time service. Specification: Tooth: 40 Size Chart: Inner Hole: 6mm/0.23in Outer Dimeter: 21.3mm/0.83in Step Outer Diameter: 12mm/0.47in Tooth Length: 4mm / 0.15inch Overall Length: 9mm / 0.35inch Package Includes: 2pcs 40T Brass Worm Gear Wheel 2pcs Gear Shaft Note: Please allow the measurement deviation of 1-3mm due to manual measurement. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.