Replacement Rotary Cutter gearbox, 40hp rated, 1-3/8" smooth input shaft with 1/2" shear bolt hole and circlip groove, 1.57" X 12 tapered spline output shaft and 1:1.47 speed up ratio. These gearboxes have a square housing configuration and are identical in mounting and ratio to the round configuration gearboxes. These gearboxes have been used by WAC, HawkLine, Behlen, International Machinery, Tarter Gate, Midwest Mfg, Servis Rhino, Frontier and many more. If your gearbox has a 12 spline output shaft and a 1-3/8" smooth input shaft with a shear bolt hole and a snap ring groove this gearbox will work. Bolt pattern is 4-3/4" on center hole to hole and 6-3/4" center to center of bolt hole on diagonal. The mounting holes form a square bolt pattern.
 
*****Please note this gearbox is shipped dry and will require 16 ounces on 80 weight gear oil or heavier!*****