CNBTR 5PCS Brass Worm Wheels | 60 Teeth | Gear Module: 0.5 | 6mm Bore Diameter | 31.2mm OD | 12mm Width | Speed Ratio 60: 1

["【Brass Gears】Brass gears have low friction and dissipate heat better than cast iron gears to provide a long service life for both the gear and the worm. They’re also more corrosion resistant than cast iron gears","【Pitch Module 0.5】 This worm gear pack comes with a wheel and a worm of the same pitch module 0.5. Gears with a module of 0.5 have small, closely spaced teeth that run smoothly and quietly at high speeds","【6MM Bore】The worm gears have a 6mm diameter bore to insert a shaft of 6mm diameter","【31.2MM OD/12mm Width】 These worm wheels have a 31.2mm outside diameter and 12mm width to work with worm gears","【Applications】Worms are used with worm wheels to reduce speeds or increase torque in mechanical applications that operate in confined spaces, such as power steering, machine tools, elevators, and chain blocks"]