There are (2) 12 ft. sections, (1) 10 ft. section, (1) 4 ft. section. The screw is about 7 in. diameter. One of the 12 ft. sections has a Dodge Torque Arm Speed Reducer. P/N 241489-TT. The drive is also a Dodge Drive, size SCX-7125, part 351164NU, 4.5 hp, 2179 rpm, ratio 25.64, max input speed 2179 rpm. There is also a Baldor Motor on this section, Cat # M3546T, Spec # 35A01-87, Frame 143T, S/N F1092, 1 hp, 208-230/460 volt, 3.6-3.4/1.7 amp, 60 hz. The other 12 ft. section has a SM-Cyclo Drive, model HM52Y, S/N 25412, 1750 rpm, input hp 1.6, output torque 935 in lbs. The 4 ft. section has a Baldor Motor, S/N 879, Cat # M3554T, Spec # 35801W206, Frame 145T, 1.5 hp, 208-230/460 volt, 5.3-5/2.5 amp,continuous duty 1725 rpm, 60 hz. There is also a Dorris Gear Drive, Model 107SMF10, S/N 107SMF5147, ratio 10