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Product description QXSJEDYCH Parameters: Frame material: aluminium alloy. Screw material: 45# steel. Turbine material: copper Speed ratio: 1:10 or 1:20. Shank diameter: 6mm or 8mm Screw diameter: 18 mm. Screw length: 32 mm. Number of worm wheel teeth: 20T. Outer diameter of worm gear: 22 mm. Tooth width: 10 mm. Outer diameter of the step: 17 mm. Step thickness: 8 mm. Installation Center Distance: 18mm Total gear weight: approx. 0.25 kg. Note: 1. Manual measurement, there may be slight errors. 2. The punching and cutting process in the processing of aluminium alloys can lead to scratches. 3. As shown in the picture, the product has no fixed mounting holes and no cover on the top and bottom. 4. It is a simple reduction gear and cannot be used for high-speed operation.; Product description QXSJEDYCH Parameters: Frame material: aluminium alloy. Screw material: 45# steel. Turbine material: copper Speed ratio: 1:10 or 1:20. Shank diameter: 6mm or 8mm Screw diameter: 18 mm. Screw length: 32 mm. Number of worm wheel teeth: 20T. Outer diameter of worm gear: 22 mm. Tooth width: 10 mm. Outer diameter of the step: 17 mm. Step thickness: 8 mm. Installation Center Distance: 18mm Total gear weight: approx. 0.25 kg. Note: 1. Manual measurement, there may be slight errors. 2. The punching and cutting process in the processing of aluminium alloys can lead to scratches. 3. As shown in the picture, the product has no fixed mounting holes and no cover on the top and bottom. 4. It is a simple reduction gear and cannot be used for high-speed operation.; QXSJEDYCH Parameters: Frame material: aluminium alloy. Screw material: 45# steel. Turbine material: copper Speed ratio: 1:10 or 1:20. Shank diameter: 6mm or 8mm Screw diameter: 18 mm. Screw length: 32 mm. Number of worm wheel teeth: 20T. Outer diameter of worm gear: 22 mm. Tooth width: 10 mm. Outer diameter of the step: 17 mm. Step thickness: 8 mm. Installation Center Distance: 18mm Total gear weight: approx. 0.25 kg. Note: 1. Manual measurement, there may be slight errors. 2. The punching and cutting process in the processing of aluminium alloys can lead to scratches. 3. As shown in the picture, the product has no fixed mounting holes and no cover on the top and bottom. 4. It is a simple reduction gear and cannot be used for high-speed operation.