A Rotary Mower Gearbox is a mechanical device that transmits power from the tractor's power take-off (PTO) to the mower blades, enabling efficient cutting of grass, weeds, and other vegetation. It is engineered to handle high torque and rotational speeds, ensuring durability and performance in demanding agricultural and landscaping applications. These gearboxes are typically constructed from hardened steel or cast iron for longevity and are sealed to protect internal components from debris and moisture.
Our rotary mower gearboxes are designed with precision to meet various operational needs. Below are the critical parameters that define their performance and compatibility.
| Model Number | Input RPM | Output RPM | Gear Ratio | Max HP | Weight (kg) |
|---|---|---|---|---|---|
| RMG-540A | 540 | 2100 | 1:3.89 | 40 | 18 |
| RMG-1000B | 1000 | 2500 | 1:2.5 | 60 | 25 |
| RMG-540C | 540 | 1800 | 1:3.33 | 30 | 15 |
| RMG-1000D | 1000 | 3000 | 1:3.0 | 80 | 35 |
| RMG-540E | 540 | 2400 | 1:4.44 | 50 | 22 |
Rotary mower gearboxes are versatile and used in various equipment, including bush hogs, finish mowers, flail mowers, and agricultural cutters. They are compatible with most tractor brands, such as John Deere, Kubota, and New Holland, thanks to standardized PTO connections. Ensure to check the input shaft size and horsepower rating before installation to avoid mismatches.
What is the typical lifespan of a rotary mower gearbox? With proper maintenance, including regular lubrication and avoiding overload, a high-quality gearbox can last 5 to 10 years or 1000-2000 operating hours, depending on usage intensity.
How often should I change the gearbox oil? It is recommended to change the oil after the first 50 hours of use for new gearboxes, and then every 200 hours or annually, whichever comes first, to ensure optimal performance and prevent wear.
Can I use a gearbox with a higher horsepower rating than my tractor? Yes, using a gearbox rated for higher horsepower is generally safe as long as the input RPM and shaft size match, but it may be heavier and more expensive. Avoid using a lower-rated gearbox to prevent damage.
What are common signs of gearbox failure? Common indicators include unusual noises (grinding or knocking), oil leaks, overheating, difficulty in engaging PTO, or reduced cutting efficiency, which may suggest worn gears or bearings.
Is it possible to repair a damaged gearbox, or should it be replaced? Minor issues like seal replacements or bearing changes can be repaired, but severe damage such as cracked housings or stripped gears often requires full replacement for safety and cost-effectiveness.
How do I choose the right gear ratio for my mower? Select a ratio based on your cutting needs: lower ratios (e.g., 1:1.5) provide faster blade speed for fine grass, while higher ratios (e.g., 1:4.44) offer more torque for thick vegetation. Consult your mower manufacturer's guidelines.
Are there waterproof or submersible rotary mower gearboxes? Standard gearboxes are not fully waterproof but are sealed against splashes. For wet conditions, look for models with enhanced sealing or consider aftermarket protective covers to extend life.
What maintenance tips can extend the gearbox's life? Regularly check oil levels, use the recommended lubricant, keep the gearbox clean from debris, avoid overloading, and inspect for leaks or damage after each use to ensure longevity.
