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Simple and Compact Design The gear structure of the worm shaft is simple, ensuring efficient and trouble-free operation. Long service life: Made of high quality metal, the worm wheel is designed for durability, while the worm wheel is made of durable bronze material, which provides excellent wear resistance and a long service life. VERSATILE COMPATIBILITY Our worm gears were designed to replace the standard 4:1 worm gear and are compatible with the Zhouyu worm gear, allowing you to achieve higher torsion or slower downforce speed as needed. INCREASED PRECISION With a D axis diameter of 4.7mm for mounting the worm gear and a D-shaped shaft of 6mm or 4.7mm for mounting the worm, this unit ensures a secure and precise fit for reliable performance. ELIMINATE REVERSE - By integrating our worm wheels into your system, the chance of reverse gear is virtually reduced to, providing extra safety and peace of mind. › See more product details; Product description Specification:Item Type:10:1 Worm Gear Gear Ratio: 10:1 Material: for worm gears made of bronze SAE 841; metal worm Note: the worm gear is mounted on a D axle diameter of 4.7 mm. The auger is mounted on a 6mm or 4.7mm D-shaped shaft. Package list: 1 x worm wheel, 1 x worm Note: 1. The worm gear is mounted on a D-axle diameter of 4.7 mm. The auger is mounted on a 6mm or 4.7mm D-shaped shaft.2. Please note that the new and old type of this product will be sent at random. Please make sure you do not mind before ordering.; Product description Specification:Item Type:10:1 Worm Gear Gear Ratio: 10:1 Material: for worm gears made of bronze SAE 841; metal worm Note: the worm gear is mounted on a D axle diameter of 4.7 mm. The auger is mounted on a 6mm or 4.7mm D-shaped shaft. Package list: 1 x worm wheel, 1 x worm Note: 1. The worm gear is mounted on a D-axle diameter of 4.7 mm. The auger is mounted on a 6mm or 4.7mm D-shaped shaft.2. Please note that the new and old type of this product will be sent at random. Please make sure you do not mind before ordering.; Specification:Item Type:10:1 Worm Gear Gear Ratio: 10:1 Material: for worm gears made of bronze SAE 841; metal worm Note: the worm gear is mounted on a D axle diameter of 4.7 mm. The auger is mounted on a 6mm or 4.7mm D-shaped shaft. Package list: 1 x worm wheel, 1 x worm Note: 1. The worm gear is mounted on a D-axle diameter of 4.7 mm. The auger is mounted on a 6mm or 4.7mm D-shaped shaft.2. Please note that the new and old type of this product will be sent at random. Please make sure you do not mind before ordering.