40 HP Gearbox RW-300, Smooth 1-3/8" Input Shaft
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
- Housing construction: Ductile iron
- Mounting Base Thickness is 3/8 inch
- 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
- For blade hub use #89754
Check out our selection of Rotary Mower Parts & Gearboxes
Purchased one of these gear boxes for my second hand, 6 ft. rotary cutter of unknown origin 15 years ago. Was a perfect fit. I check the oil level at start of every mowing season. Couple of days ago I noticed it was a bit noisier than usual. Checked oil again and none. Hard to say if the bearing wear caused the output shaft seal to die or vice versa . Gear backlash is still good and not a lot of play in output shaft. I plan to rebuild it if the gears still look ok but need to get cutter working now so going to buy another. I only use the cutter on average 50 hours a year but I still consider 15 years of use to be pretty good service considering the beating it takes in the rocky ground I have and it sits out all year. — Ferd from KS
Read More Reviews