Worm Outer Diameter 10Mm Small Copper Worm Reduction Ratio 1:60 Worm Gear Worm Worm Gear Small Reduction Machine Box Production Small copper worm Worm gear Small speed reducer Small copper worm gear Worm and worm gear Small deceleration machine 1.The worm drive structure is simple, compact, small in size and light in weight. 2.The worm shaft Z1 = 1, turn a worm gear tooth, you can get a larger transmission ratio, generally in the power transmission, the transmission ratio I = 10-80, as the transmission ratio is large, if you match the gear transmission, you will need to take more Phase transfer. 3.High-quality materials selection, carefully processed to produce high-quality products. Worm outer diameter: 10mm Worm inner hole: 3mm Turbine bore: 5mm Material:copper colour:Gold Package Contents: 1 * worm 1 * turbine Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.