The 800 series Grove Gear® IRONMAN® gear reducer is a true heavy duty workhorse that handles the environmental assaults, shock loading, frequent reversing and continuous duty cycles typical in many industrial applications. Designed to be the premium worm reducer in the industry, IRONMAN® reducers offer top quality features. Grove Gear® IRONMAN® Worm Gear Reducer, Narrow Housing Right Angle Single Reduction, Series: NH Series, 20:1 Gear Ratio, 15.56 HP Input, 12.98 HP Output, C-Face Quill Input, Shaft Output, 1-3/8 in Dia Input, 2 in Dia x 4.72 in L Output, 87 RPM Output Maximum Speed, 1750 RPM Input Maximum Speed, 9351 in-lb Output, 5-1/4 in Centre Distance, 5/16 x 5/32 in Input, 1/2 x 2-1/2 in Output Keyway, PAG Synthetic Oil Lubrication, Base Mount, Cast Iron