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The Agricultural Bevel Gearbox is a right-angle transmission system that converts power from the tractor PTO or engine into mechanical energy for implements.Engineered to transfer power between intersecting shafts – the critical link for combine harvesters, rotary cutters, tillers, and grain transport systems. Built to thrive in dust, moisture, and heavy loads.
In agricultural machinery, power doesn’t always flow in straight lines. From combine harvesters (where horizontal engine power meets vertical threshing shafts) to rotary tillers (connecting tractor PTO to angled tines), agricultural bevel gearboxes enable efficient power transmission at 90° or custom angles – a function no other gear type can perform reliably.
With global farm mechanization rates exceeding 60% in major economies (FAO, 2024), downtime from gearbox failure costs farmers $300+ per hour during peak seasons. GTM’s bevel gearboxes are engineered to eliminate this risk, with precision-cut gears and rugged housings that outlast generic alternatives by 3x.
Our range includes specialized models for every task: from bevel gear boxes for agricultural combine harvesters to heavy-duty options for rotary cutter gearboxes, rotary tiller gearboxes, and grain transportation gearboxes.
Agricultural Bevel Gearbox - Universal model for 90° power transmission in diverse farm machinery
A versatile bevel gearbox designed for 90° power transfer across small to medium agricultural equipment. Ideal for irrigation pumps, hay balers, and light-duty implements.
Power Range: 10-50 HP (7.5-37 kW)
Speed: 540-1000 RPM input; 150-600 RPM output (custom ratios available)
Material: Spiral bevel gears (20CrMnTi alloy steel); GG20 cast iron housing
Angle: 90° standard (45°/60° on request)
Installation: Flange or foot-mounted; includes keyway shafts for easy coupling
Protection: NBR oil seals (resist agricultural fluids); IP65 dust/water resistance
Bevel Gear Box for Agricultural Combine Harvester - Optimized for threshing and cleaning systems
High-precision spiral bevel gearboxes built for combine harvesters, where they synchronize power between the main engine and threshing/separating units under variable loads.
Power Range: 80-150 HP (60-110 kW)
Speed: 1800-2200 RPM input; 300-800 RPM output (adjustable via 3:1 to 5:1 ratios)
Material: Carburized spiral bevel gears (60-62 HRC hardness); aluminum alloy housing (lightweight, heat-dissipating)
Angle: 90° with offset shafts (reduces combine footprint)
Installation: Compact design for tight engine bays; vibration-dampening mounts
Feature: Noise-optimized gear geometry (≤72 dB); lifetime-lubricated bearings (minimal maintenance)
Rotary Cutter Bevel Gearbox - Heavy-duty model for brush and vegetation cutting
Heavy-duty bevel gearboxes for rotary cutters, engineered to handle sudden torque spikes from thick brush, rocks, and uneven terrain while maintaining 90° power transfer.
Power Range: 20-80 HP (15-60 kW)
Speed: 540 RPM input; 180-300 RPM cutter shaft output
Material: Forged steel bevel gears; ductile iron housing (impact-resistant)
Angle: 90° with reinforced gear meshing (prevents slippage under load)
Installation: Splined PTO input; bolt-on mounting for 3-point hitch systems
Protection: Overload clutch (prevents gear damage); double-lip seals (no oil leakage)
Rotary Tiller Bevel Gearbox - For efficient soil tilling and seedbed preparation
Bevel gearboxes optimized for rotary tillers, ensuring uniform power distribution to tines for consistent tilling depth (2-14 inches) in clay, loam, or rocky soils.
Power Range: 15-60 HP (11-45 kW)
Speed: 540 RPM input; 220-400 RPM tiller tine output
Material: High-carbon steel bevel gears; heat-treated cast iron housing
Angle: 90° with self-aligning gears (compensates for tiller vibration)
Installation: Quick-connect PTO; adjustable brackets for 2/3-point hitches
Feature: Reverse rotation option (for heavy soil); grease nipples at all pivot points
Grain Transportation Bevel Gearbox - Powering augers and conveyor systems
Bevel gearboxes for grain augers and conveyors, delivering steady torque at 90° angles to prevent jams during high-volume harvesting and transport.
Power Range: 30-120 HP (22-90 kW)
Speed: 1000 RPM input; 50-250 RPM auger/conveyor output
Material: Nitrided bevel gears (corrosion-resistant); IP67-rated cast iron housing (waterproof)
Angle: 90° or 60° (custom for vertical/horizontal auger setups)
Installation: Shaft-mounted with keyway; compatible with chain/belt drives
Efficiency: 96%+ power transmission; low-heat design for 24-hour harvest cycles
Every GTM Agricultural Bevel Gearbox is built on a foundation of precision engineering and agricultural expertise. Here’s how we outperform standard gearboxes:
Our spiral bevel gears (vs. straight bevel) offer 30% more contact area, reducing wear and enabling smoother operation – critical for minimizing vibration in combine harvesters and tillers.
Precision Grinding & Lapping
Gears are ground to 0.001mm tolerance and lapped for perfect meshing, ensuring 97%+ power transmission efficiency (industry average: 85-90%).
Carburizing to 1.2mm depth followed by tempering creates gears with surface hardness of 60 HRC (resistant to abrasion) and core toughness (prevents breakage).
We design bevel gearboxes with angles from 45° to 90° and gear ratios from 1:1 to 10:1, tailored to your specific machinery .
ISO 9001:2015, CE, and SAE certified – tested for 500+ hours under extreme conditions (-20°C to +120°C) to ensure reliability worldwide.
| Gearbox Type | Max Torque (N·m) | Weight (kg) | Oil Capacity (L) | Service Life (Hours) |
|---|---|---|---|---|
| Agricultural Bevel Gearbox (Multi-Application) | 500-1500 | 15-40 | 1.2-3.0 | 50,000+ |
| Combine Harvester Bevel Gear Box | 1200-3000 | 35-70 | 2.5-5.0 | 60,000+ |
| Rotary Cutter Bevel Gearbox | 800-2200 | 25-60 | 1.8-4.0 | 50,000+ |
| Rotary Tiller Bevel Gearbox | 600-1800 | 20-50 | 1.5-3.5 | 50,000+ |
| Grain Transportation Bevel Gearbox | 1000-3500 | 40-90 | 2.8-6.0 | 60,000+ |
Client: European Harvester Manufacturer
Gear Type: Spiral Bevel, 1:1.93 Ratio
Input Speed: 1000 RPM
Torque Output: 820 N·m
Result: Improved header stability by 15%, reduced vibration and noise levels, and increased lifespan by 30% compared to imported models.
“The gearbox’s compact structure and low noise performance exceeded our OEM expectations.” — Combine Design Engineer, Germany
Client: Agricultural Machinery Distributor, India
Gear Ratio: 1:2.07
Material: 20CrMnTi gears, cast iron housing
Result: Enhanced soil tilling uniformity and reduced maintenance cost by 25%. Operated flawlessly across 900 hours of continuous fieldwork.
“Excellent gearbox reliability. GTM provided full technical support for adaptation and testing.”
Client: Grain Storage Project, Argentina
Gear Ratio: 1:1
Power: 60 HP
Mounting: Vertical right-angle output
Result: Stable torque output and 99% uptime during peak harvest season; compact installation design saved 15% floor space.
30+ years specializing in agricultural bevel gearboxes (no generic industrial parts)
99% on-time delivery rate
In-house testing lab: 10,000+ hours of simulated field stress tests (dust, moisture, overload)
Dedicated agricultural engineers on staff (not just sales reps) to advise on gearbox selection
Used by 5 of the top 10 global agricultural equipment manufacturers as OEM components
Whether you need a direct replacement or a custom bevel gearbox for your combine, cutter, tiller, or grain system, our team will design the perfect solution. Get a no-obligation quote today.
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