540 RPM or 1,000 RPM Three spindle gearboxes, 120 HP, base mounted, 1:1.46 ratio. One divider box, 160 HP, base mounted. All gearboxes have malleable housings, forged alloy steel, carburized and hardened gears and shafts, tapered and ball bearings. 6 splined 1 3/8″ input shaft, 2 3/8″ output shaft on spindle boxes.