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Welcome to our comprehensive product solution for the Agricultural Tractor Gearbox line.Engineered for seamless power transmission – from tractors to rotary cutters, tillers, grain transporters, and combine harvesters. Built to outperform in every field condition.Our gearboxes are engineered to meet the demanding conditions of modern agriculture — high torque, varying speeds, harsh environments — helping you reduce downtime, increase productivity and gain confidence in your equipment.
In an era where global agricultural output must rise 70% by 2050 to feed a growing population (UN Food and Agriculture Organization), the reliability of tractor gearboxes is non-negotiable. These critical components convert and distribute engine power to implements, directly impacting productivity, fuel efficiency, and operational uptime.
Agricultural Tractor Gearboxes are the bridge between tractor performance and task-specific demands – whether it’s the high torque needed for a rotary tiller, the precision of a combine harvester’s bevel gear system, or the steady output required for grain transport. GTM’s range is designed to eliminate power loss, reduce maintenance, and maximize uptime for farms of all sizes.
Agricultural Tractor Gearbox - Main power transmission unit for tractors
The foundational gearbox for tractor power distribution, compatible with 20-120 HP tractors. Designed to handle variable loads across plowing, hauling, and implement operation.
Power Range: 20-120 HP (15-90 kW)
Input/Output Speed: 1800-2400 RPM input; 540/1000 RPM PTO output (standard)
Material: Forged alloy steel gears (42CrMo); GG25 cast iron housing (anti-vibration)
Installation: Direct flange mount to tractor engine; includes alignment pins for precision fitting
Durability: 50,000+ hour service life; sealed bearings to resist dust/moisture
Rotary Cutter Gearbox for brush and vegetation management
Heavy-duty gearboxes for tractor-mounted rotary cutters, built to withstand sudden torque spikes from thick brush, rocks, and uneven terrain.
Power Range: 15-80 HP (11-60 kW)
Speed: 540 RPM input; 150-300 RPM cutter output
Material: Case-hardened gears (60 HRC); ductile iron housing (impact-resistant)
Installation: Splined PTO shaft connection; adjustable mounting brackets for 3-point hitch
Protection: Overload clutch option; double-lip oil seals to prevent leakage
Rotary Tiller Gearbox for soil preparation and seedbed creation
Optimized for soil tilling and seedbed preparation, ensuring uniform power distribution for consistent tilling depth (2-14 inches).
Power Range: 10-60 HP (7.5-45 kW)
Speed: 540 RPM input; 200-400 RPM tiller shaft output
Material: High-carbon steel gears; heat-treated cast iron housing
Installation: Quick-connect PTO; compatible with 2-point and 3-point tractor hitches
Feature: Reverse rotation option for heavy clay soils; grease nipples for easy maintenance
Grain Transportation Gearbox for augers and conveyor systems
Powering grain augers, carts, and conveyors with steady torque to prevent jams during high-volume harvesting and transport.
Power Range: 30-150 HP (22-110 kW)
Speed: 1000 RPM input; 50-250 RPM auger/conveyor output
Material: Alloy steel gears with nitride coating; IP68-rated waterproof housing
Installation: Shaft-mounted with keyway; compatible with chain, belt, or direct drives
Efficiency: 97% power transmission; low-heat design for 24-hour harvest shifts
Bevel Gear Box for Agricultural Combine Harvester - Optimized for threshing and separation
Precision bevel gear systems for combine harvesters, ensuring smooth power transfer between horizontal and vertical shafts in threshing and separation units.
Power Range: 80-150 HP (60-110 kW)
Speed: 1500-2000 RPM input; 300-800 RPM output (adjustable ratios)
Material: Spiral bevel gears (high-strength 20CrMnTi); aluminum alloy housing (lightweight, heat-dissipating)
Installation: Compact design for tight combine interiors; flange-mounted with anti-vibration gaskets
Feature: Noise-reducing gear geometry (≤70 dB); self-lubricating bearings for low maintenance
Every GTM Agricultural Tractor Gearbox is the result of 25+ years of precision engineering and agricultural machinery expertise. Our commitment to quality is embedded in every component:
Gears machined to 0.002mm tolerance for zero backlash, ensuring efficient power transfer and minimal wear.
Carburizing and tempering processes create gears with surface hardness up to 62 HRC and core toughness to resist breakage.
We design gear ratios, shaft lengths, and mounting flanges to match your exact tractor/implement model (John Deere, Case IH, Kubota, etc.).
ISO 9001:2015, CE, and SAE J1178 certified – meeting safety and performance standards for North America, Europe, and Asia.
| Gearbox Type | Max Torque (N·m) | Weight (kg) | Oil Capacity (L) | Operating Temp Range (°C) | Warranty |
|---|---|---|---|---|---|
| Agricultural Tractor Gearbox | 1200-3500 | 45-90 | 4.5-8.0 | -20 to +120 | 3 years |
| Rotary Cutter Gearbox | 800-2200 | 30-65 | 2.0-5.0 | -15 to +110 | 2 years |
| Rotary Tiller Gearbox | 600-1800 | 20-50 | 1.5-4.0 | -15 to +100 | 2 years |
| Grain Transportation Gearbox | 1500-4000 | 50-120 | 3.0-9.0 | -20 to +120 | 3 years |
| Combine Harvester Bevel Gear Box | 1000-3000 | 35-75 | 2.5-6.0 | -10 to +110 | 3 years |
Client: Agricultural Machinery OEM in Brazil
Application: 2.1 m Rotary Tiller attached to a 90 HP tractor
Gearbox Type: Rotary Tiller Gearbox
Gear Ratio: 1 : 2.07
Input Speed: 540 RPM
Output Speed: 261 RPM
Torque Output: 850 N·m
Installation Type: Flange-mounted, horizontal output shaft
Material: 20CrMnTi gears, cast iron housing
Result:
After replacing standard tiller drives with our gearbox, the client achieved:
25% higher tilling efficiency due to improved torque balance
Reduced vibration and smoother soil penetration
Maintenance interval extended from 400 hours to 700 hours
Over 1,000 units shipped for OEM use since 2023
Customer Feedback:
“The gearbox delivered by GTM provided exceptional stability and reduced power loss. It helped us enhance both reliability and profitability in our rotary tiller line.”
Client: Farm Equipment Distributor in Australia
Application: 1.8 m Heavy-Duty Rotary Cutter
Gearbox Type: Rotary Cutter Gearbox
Gear Ratio: 1 : 1.47
Power Input: 120 HP tractor
Housing Material: High-strength cast iron with anti-corrosion coating
Lubrication: SAE 80W-90 synthetic oil bath
Result:
Operating in the hot and dusty conditions of Queensland, this gearbox demonstrated:
Continuous operation under 40 °C without overheating
98% mechanical efficiency and stable performance
Over 1,500 hours of field use without seal leakage
30% reduction in total maintenance costs for the fleet
Customer Feedback:
“We’ve tested several gearboxes over the years — GTM’s rotary cutter gearbox is by far the most reliable and easy to maintain.”
Client: Agricultural Combine Harvester Manufacturer (Eastern Europe)
Application: Combine header drive system (corn harvester)
Gearbox Type: Bevel Gearbox for Combine Harvester
Gear Ratio: 1 : 1.93 spiral bevel configuration
Input Speed: 1000 RPM
Output Torque: 780 N·m
Mounting Orientation: Vertical input, 90° output
Gear Type: Spiral bevel gears, carburised & ground
Material: 20CrMnTi, HRC 58-62 surface hardness
Result:
After replacing imported units with GTM-BGH75:
Reduced gearbox temperature rise by 15 °C under heavy load
Improved harvesting efficiency by 12%
Noise level decreased from 86 dB to 78 dB
Lower total cost per unit by 20% compared to European suppliers
Customer Feedback:
“The compact design and stable torque delivery perfectly match our combine’s header drive requirements. GTM’s technical team provided excellent support from prototype to production.”
25+ years of specializing in agricultural gearboxes (no generic industrial parts)
98% customer retention rate – 85% of clients repurchase within 2 years
In-house testing lab with 10,000+ hours of simulated field operation
24/7 technical support
Fast shipping:10-14 days for custom designs
Free on-site installation guidance for bulk orders
Whether you need a direct replacement or a custom gearbox for your tractor or implement, our team will help you find the perfect fit. Get a no-obligation quote today.
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