Dodge® Torque-Arm™ (TXT) is a shaft mount helical gear reducer that mounts directly to the driven shaft. TXT is a proven gear reducer that can be installed in the toughest applications requiring long life. Many accessories are available to make this reducer suitable for a wide range of environments. Dodge® Torque-Arm™ Speed Reducer, Standard Double Reduction, 25:1 Gear Ratio, 4.15 HP, Solid Shaft Input, Twin Tapered Bushed Bore Output, 0.75 in Dia x 3.29 in L Input, 1-7/16 in Output, 2179 RPM Input Maximum Speed, 98.5 % Efficiency, Oil Lubrication, Shaft Mount, Cast Iron, Gray, 7.13 in L x 7.06 in W x 9.94 in H