Restore reliable power transfer to your rotary cutter with this heavy duty replacement gearbox. Built with a ductile iron housing for long lasting strength and dependable field performance in demanding mowing applications.
Features a 1-3/8 in. 6-spline input shaft and a 2 in. 15-spline output shaft for standard fitment. Operates at a maximum of 540 RPM with a 1:1.46 gear ratio and bevel gear design for efficient torque conversion. The input shaft can rotate clockwise or counter-clockwise for versatile installation. Designed for 5, 6, and 7 ft. rotary cutters with 75 HP compatibility. Mounting features 4 holes with a 3/4 in. size on an 8 in. bolt pattern.
Installation Tip: After installing the pan and blades onto the gearbox, ensure the blades when turned back toward the gearbox shaft do not hit the shaft or nut but clear them before using the rotary cutter.
Maintain reliable power transmission in rotary mower applications with this 125 HP tall square gearbox. Designed for demanding agricultural use, it provides efficient transfer of power from the PTO driveline to cutting components while supporting dependable field performance.
Featuring a 1-3/8 in. 6-spline input shaft and a 2 in. output shaft, this gearbox is engineered for heavy-duty operation. The 1:1.46 gear ratio helps deliver efficient performance for rotary mower and cutter applications. Hub not included.
Restore reliable power transfer to your rotary cutter with this heavy duty replacement gearbox. Built with a ductile iron housing for long lasting strength and dependable field performance in demanding mowing applications.
Features a 1-3/4 in. 20-spline input shaft and a 2 in. 15-spline output shaft for standard fitment. **Operates at a maximum of 540 RPM** with a 1:1.46 gear ratio for efficient torque conversion. The input shaft can rotate clockwise or counter-clockwise for versatile installation. Designed for 5, 6, and 7 ft. rotary cutters with 75-90 HP compatibility. **Mounting features 4 holes with a 3/4 in. size on an 8 in. bolt pattern with 5.5 in. clearance for the output cap.** Comes complete with castellated nut and carrier hub for stump jumper installation. Manufacturer Part Number: RW-710-20S.
Restore reliable power transfer to your rotary cutter with this heavy duty replacement gearbox. Built with a ductile iron housing for long lasting strength and dependable field performance in demanding mowing applications.
Features a 1-3/8 in. 6-spline input shaft and a 2 in. 15-spline output shaft for standard fitment. Operates with a 1:1.46 gear ratio for efficient torque conversion in counter-clockwise rotation. Designed for 5, 6, and 7 ft. rotary cutters with 75-90 HP compatibility. Mounting features 4 holes with a 3/4 in. size on an 8 in. bolt pattern with 5.5 in. clearance for the output cap. Comes complete with castellated nut and carrier hub for stump jumper installation. Manufacturer Part Number: RW-710-6S.
Restore reliable power transfer to your dual spindle rotary cutter with this heavy duty replacement center gearbox. Built with a ductile iron housing for long lasting strength and dependable field performance in demanding mowing applications.
Features 1-3/8 in. 6-spline input and output shafts for standard PTO and second-stage gearbox fitment. Operates at a maximum of 540 RPM with a 1:1.21 gear ratio and bevel gear design for efficient torque conversion. Designed for 8 and 10 ft. dual spindle rotary cutters with 100 HP compatibility. Mounting features 4 holes with a 5/8 in. size on a 6 in. x 3-1/4 in. bolt pattern. A direct replacement for center gearboxes on heavy duty 10 ft. mowers. Manufacturer Part Number: RW61T.
Restore reliable power transfer to your rotary cutter with this heavy duty replacement gearbox. Built with a ductile iron housing for long lasting strength and dependable field performance in demanding mowing applications.
Features a 1-3/8 in. smooth input shaft and a 2 in. 15-spline output shaft for standard fitment. Operates at a maximum of 540 RPM with a 1:1.46 gear ratio and bevel gear design for efficient torque conversion. The input shaft can rotate clockwise or counter-clockwise for versatile installation. Designed for 5, 6, and 7 ft. rotary cutters with 75 HP compatibility. Mounting features 4 holes with a 3/4 in. size on an 8 in. bolt pattern. Manufacturer Part Number: RW-610.
Restore reliable power transfer to your post hole digger with this durable auger gearbox. Built with a ductile iron housing for long lasting strength and dependable field performance.
Features a 1-1/4 in. smooth input shaft and a 2 in. smooth output shaft for standard fitment. Includes a bevel gear system with a 3.18:1 gear ratio for efficient torque conversion. Compatible with up to 57 HP for demanding digging applications. Manufacturer Part Number: RW-500.
Replace worn or damaged gearboxes on your rotary mower with this complete 55 HP rated gearbox assembly featuring a smooth input shaft. Designed for medium duty rotary cutter applications requiring reliable power transmission and long service life.
Built with heavy duty cast construction for reliable strength and impact resistance in demanding rotary mowing operations. Features a smooth input shaft (for keyed PTO connection) and a splined output shaft for blade mounting. The 90-degree gear reduction design efficiently transfers power from the horizontal PTO input to the vertical blade shaft output. Rated for 55 HP operation, this gearbox is ideal for 5-6 ft. rotary cutters and medium duty agricultural applications.
Product Detail
Brand
Grizzly
Style
90-Degree Rotary Mower Gearbox with Smooth Input Shaft
Restore reliable power transfer to your post hole digger with this durable auger gearbox. Built with a ductile iron housing for long lasting strength and dependable field performance.
Features a 1-1/4 in. smooth input shaft and a 2 in. smooth output shaft for standard fitment. Includes a bevel gear system with a 2.92:1 gear ratio for efficient torque conversion. Compatible with 30-45 HP for standard post hole digging applications. Uses 90 weight gear oil for lubrication. Manufacturer Part Number: RW-260.
Installation & Oil Fill Tip:
To properly fill with oil, remove the 1/4 in. plug at the rear of the gearbox and pour 90 weight gear oil through the top plug until it starts running out of the 1/4 in. plug. Replace and tighten the plug snugly.
Restore reliable power transfer to your rotary cutter with this heavy duty replacement gearbox. Built with a ductile iron housing for long lasting strength and dependable field performance in demanding mowing applications.
Features a 1-3/8 in. smooth input shaft and a 1-1/2 in. 12-spline output shaft for standard fitment. Operates at a maximum of 540 RPM with a 1:1.93 gear ratio and bevel gear design for efficient torque conversion. Designed for 4, 5, and 6 ft. rotary cutters with 35-45 HP compatibility. Mounting features 4 holes with a 5/8 in. size on a 6-3/4 in. bolt pattern. Manufacturer Part Number: RW-300.
Restore reliable power transfer to your rotary cutter with this heavy duty replacement gearbox. Built with a ductile iron housing for long lasting strength and dependable field performance in demanding mowing applications.
Features a 1-3/8 in. smooth input shaft and a 1-1/2 in. 12-spline output shaft for standard fitment. Operates at a maximum of 540 RPM with a 1:1.47 gear ratio and bevel gear design for efficient torque conversion. The input shaft can rotate clockwise or counter-clockwise for versatile installation. Designed for 4, 5, and 6 ft. rotary cutters with 40 HP compatibility. Fits many brands of mowers.
Mounting features 4 holes with a 5/8 in. size on a 6-3/4 in. bolt circle, with 4-3/4 in. distance between mounting holes and a 3/8 in. mounting base thickness. Stands 9 inches tall overall. Uses 90 weight gear oil (not included). The input shaft snap ring is included and located in the plastic tube attached to the shaft. Manufacturer Part Number: RW-300.
Restore reliable power transfer to your rotary cutter with this heavy duty replacement gearbox. Built with a ductile iron housing for long lasting strength and dependable field performance in demanding mowing applications.
Features a 1-3/8 in. 6-spline input shaft and a 1-1/2 in. 12-spline output shaft for standard fitment. Operates at a maximum of 540 RPM with a 1:1.47 gear ratio and bevel gear design for efficient torque conversion. Designed for 4, 5, and 6 ft. rotary cutters with 35-45 HP compatibility. Mounting features 4 holes with a 5/8 in. size on a 6-3/4 in. bolt pattern.
**Installation Tip:** After installing the pan and blades onto the gearbox, ensure the blades when turned back toward the gearbox shaft do not hit the shaft or nut but clear them before using the rotary cutter.
Manufacturer Part Number: RW-300-6S.
Product Detail
Bevel
Yes
Brand
Grizzly
Capacity
40 HP
Description
Mounting Pattern: (4) 3/4 in. Holes - 8 in. Pattern - 5.5 in. Center
Get your fertilizer spreader back in working order with this 1:1 ratio replacement gearbox. Designed as a direct replacement for damaged or worn out spreader gearboxes, this unit restores full spreading performance to your equipment.
Features a 1-3/8 in. 6-spline input shaft and a 1 in. output shaft for reliable power transfer. Equipped with 6 mounting holes for secure installation and a grease zerk for easy lubrication and long lasting operation.
