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, 3.947 HP Input, 3.407 HP Output, C-Face Quill Input, Hollow Bore Output, 7/8 in Dia Input, 1-1/2 in Dia Output, 87 RPM Output Maximum Speed, 1750 RPM Input Maximum Speed, 2454 in-lb Output, 3 in Centre Distance, 3/16 x 3/32 in Input, 3/8 x 3 in Output Keyway, PAG Synthetic Oil Lubrication, Shaft Mount, Cast Iron