Our shaft mount gear reducers, known as the “Original” Shaft Mount Gear Reducer comes in box sizes of 2-9 with ratios of 15:1 and 25:1. These are dimensional drop-in replacements for all major brands. They are the tapered bushing type (bushing not included but we have the tapered bushing kits). Units are assembled with “Ultra-high” quality NSK tapered bearings. They are all cast iron housings with case hardened shafts and gears, extended gear centers and tooth contact. Included is metal reinforced double lip, spring loaded oil seals. A torque arm is also included.