40 HP Gearbox RW-300-6S, Spline 1-3/8" Input Shaft


$140.99 EA

With a rated horsepower capacity of 40, this gearbox will provide an excellent operation to your rotary cutter. It has a 6 spline input shaft that measures 1-3/8 in. This rotary gearbox may be used with 4 ft., 5 ft., and 6 ft. rotary cutters.

Availability: In Stock -

Gearboxes work to administer a transfer of speed and torque through their internal gear rotation, helping the overall performance of your rotary cutter. This RW-300-6S gearbox operates at 40 HP. The housing is constructed from durable ductile iron and the input shaft measures 1-3/8 in. with 6 splines. It has a beveled type of gear, with the gear ratio measuring 1:1.47. Designed for use with 4 ft., 5 ft., and 6 ft. rotary cutters, this rotary cutter gearbox has 4 bolt holes measuring 5/8 in. on a 6-3/4 in. bolt pattern for installment.


  • Gearbox RW-300-6S
  • Horsepower: 40
  • For 4ft., 5ft., and 6 ft. rotary cutters
  • Housing construction: Ductile iron
  • 6 spline Input shaft: 1-3/8 in.
  • Gear ratio: 1:1.47
  • Gear type: Bevel gear
  • Bolt holes: 4, with 5/8 in. diameter
  • Bolt pattern: 6-3/4 in.
  • Output shaft 1-1/2" 12 Spline
  • Come with the castellated nut and the carrier hub for the stump jumper (if needed)
  • For castle nut use ASC # 102241 - 1" Castle Nut
  • For output shaft gearbox seal RW300 use # 89757
  • For input shaft gearbox seal RW300 use #89756

Check out our selection of Rotary Mower Parts & Gearboxes

  40HP GEARBOX SPLINE INPUT SHAFT in Rotary Mower Parts and Farm Machinery Parts at Agri Supply ®.

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CategoryNumber: 1900059