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Low noise / differenet color with the torque 400-2500Nm Cylindrical Gear Reducer Product description: 1. The gear is made of high strength low carbon alloy steel through carburization and quenching. The hardness of tooth surface may reach to HRC58-62. All gear adapts NC tooth grinding process, high in accuracy and good in contact performance; 2. High in transmission efficiency: single stage, more than 96.5%; double-stage, more than 93%; three- stage, more 90%; 3. Smooth and