Sumitomo SM-Cyclo 400-Series Speed Reducer. Model: CHH-4195Y-59. S/N: VA0051679. Input horsepower: 23.4. Input speed: 1750 rpm. Ratio: 59. Output torque: 46,000 in-lbs. Input shaft: 3-5/8 in. Output shaft: 1-3/4 in. Sumitomo Cyclo speed reducers and gearmotors are the premier in-line drives. The revolutionary Cyclo design provides quiet, efficient and reliable performance exceeding that of involute tooth gear designs. Provides exceptional rugged and shock resistant performance. Horizontal mounting position. Overall dimensions: 24 in. L x 21 in. W x 19 in. H.