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Greensky is a manufacturer of gearbox/speed reducer in China. Worm gears are the densest type of system and give high-ratio speed reduction. They are usually the favored type of gearing system when space is confined, and large gear ratios are needed. Worm gears can be utilized to either considerably increase torque or considerably reduce speed. They are additionally the smoothest and softest of the gear systems, as long as they are correctly mounted and lubricated.

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