The speed reducer shall be coupled enclosed shaft mount type unit with a triple reduction ratio. The reducer shall mount directly on the driven shaft and utilize an adjustable torque arm that attaches from the gear case to the support structure or foundation. The motor shall be attached to the reducer with a cast iron adapter and shall utilize a flexible, jaw style, 3 piece coupling to eliminate fretting corrosion and allow for any minor misalignment issues. Dodge® Motorized Torque-Arm® II Reducer, 2-Piece Heavy-Duty, Series: MTA3, 44:1 Gear Ratio, 20.7 HP, C-Face Input, Twin Tapered Bushed Bore Output, 9 in Dia x 6.69 in L Input, 2-3/8 in Output, 79 RPM Output Maximum Speed, 3450 RPM Input Maximum Speed, 15024 in-lb Torque, Oil Lubrication, Shaft Mounting, Cast Iron, Gray Painted, 14.82 in L x 8.62 in W x 21.43 in H