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40 HP Gearbox RW-300, Smooth 1-3/8" Input Shaft

The average rating for this product is 5 out of 5 stars
3 reviews
With a rated horsepower capacity of 40, this gearbox will provide an excellent operation to your rotary cutter. It has a smooth input shaft that measures 1-3/8 inches. This rotary gearbox may be used with 4 foot, 5 foot, and 6 foot rotary cutters.
Availability:
#87854
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Product Overview

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 gearbox operates at 40 HP. The housing is constructed from durable ductile iron and the smooth input shaft measures 1-3/8 inches. It has a beveled type of gear, with the gear ratio measuring 1:1.47. Designed for use with 4 foot, 5 foot, and 6 foot rotary cutters, this rotary cutter gearbox has 4 bolt holes measuring 5/8 inch on a 6-3/4 inch bolt circle for installment.

Specifications

  • Fits many brands of mowers
  • Gearbox RW-300
  • Horsepower: 40
  • Max RPM 540
  • Turns both clockwise or counterclockwise
  • For 4 ft., 5 ft., and 6 ft. rotary cutters
  • Come with the castellated nut and the carrier hub for the stump jumper (if needed)
  • Housing construction: Ductile iron
  • Mounting Base Thickness is 3/8 inch
  • Mounting Holes are 3/4 inch diameter
  • 9 inches tall
  • Distance between mounting holes is 4-3/4 inch
  • Smooth input shaft: 1-3/8 in diameter X 3-7/8 inches long
  • Output shaft 1-1/2 inch diameter X 12 Spline being 4-1/2 inch length
  • Spline length is 2-5/8 inches
  • Gear ratio: 1:1.47
  • Gear type: Bevel gear
  • Bolt pattern: (4) 5/8 inch diameter holes on a 6-3/4 inch bolt circle
  • Uses 90 Weight Gear Oil (Not included)
  • The input shaft snap ring comes with this and is located in the plastic tube attached to the shaft
  • 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

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Product Review Summary
Based on 3 reviews
The average rating for this product is 5 out of 5 stars
Overall Rating: 5.0/5.0
Customer Reviews
October 20, 2020
5' King Kutter
This shopper rated the product 5 out of 5 stars

This replacement gearbox worked perfectly on my bush hog.

PirateKevinNC from NC
May 23, 2019
gearbox rw-300
This shopper rated the product 5 out of 5 stars

received it today.installed it on 5 ft. brush hog works great. great price. Works great. Thank you.

Elton Kramer from OR
August 01, 2017
Great Replacement
This shopper rated the product 5 out of 5 stars

Gearbox fit my older Pittsburgh Field General perfect. Box came with new output castle nut which wasnt clear in the description. Dont forget to fill it with 90 weight oil before you run it.

J. Duffy from SC