When your rotary cutter or bush hog starts making grinding noises or the blades aren’t spinning like they should, it’s usually the gearbox calling for attention. This 40-horsepower unit is built to handle the tough job of transferring power from your tractor’s PTO down to the cutting blades, giving you the torque multiplication you need to slice through thick brush and tall grass without bogging down your engine.
What You’re Getting
- 1 to 1.47 gear ratio that boosts your cutting torque while maintaining good blade speed
- Bevel gear design that smoothly redirects power 90 degrees from horizontal input to vertical output
- 6-spline input shaft that connects directly to your tractor’s 540 RPM PTO without adapters
- Heavy-duty 12-spline output shaft built to handle the shock loads from hitting rocks and stumps
- Four-bolt mounting pattern on a 6-1/2 inch circle that fits most standard rotary cutter decks
Built for Real Farm Work
This gearbox is sized perfectly for mid-range rotary cutters and bush hogs—the kind you’d pull behind a 40 to 60 horsepower tractor for maintaining pastures, clearing fence rows, or chopping down overgrown areas. Whether you’re running a 5-foot cutter on rolling pasture or a 6-footer through thick Johnson grass, this unit delivers the power your blades need to keep cutting cleanly.
Made to Last
Farm implements take a beating, especially rotary cutters that hit everything from saplings to hidden fence posts. This gearbox is built with robust internal gears and quality seals that keep the oil in and dirt out. The cast housing can handle the vibration and impacts that come with heavy brush cutting season after season.
Good to Know
Installation is straightforward if you’re replacing a worn unit—just match up those four mounting bolts and connect your PTO shaft to the 6-spline input. Don’t forget to check the gear oil level after installation, and keep an eye on it during heavy use. The included blade hub and castle nut make assembly complete and ready to go.
