High-Module Spur Gear Transmission for Folding Power Harrows in Heavy Brazilian Clay.
The Critical Final Drive: Translating Power to the Soil
In the architecture of a 6-meter or 8-meter folding power harrow used in the vast soy plantations of Mato Grosso, the Central Splitter Box is only the beginning. The power is transmitted via cross-shafts to the Side Gearboxes (Wing Drives), which then drive the internal train of Satellite Gears housed within the structural trough.
While the central box manages speed, the Side and Satellite gearboxes manage Kepadatan Torsi Dan Phase Timing. In Brazilian Terra Roxa soil, which can become as hard as concrete during dry spells, the stress on these components is immense. A single tooth failure in the satellite chain causes a catastrophic “zipper effect,” destroying the entire bed.
EVER-POWER’s Side Gearbox systems are engineered with Module 8 to Module 10 Spur Gears, utilizing a “Timing-Lock” design that ensures perfect synchronization of the counter-rotating blades. Our housings are reinforced with QT450 Ductile Iron to resist the flexing of the harrow wings over uneven terrain, a common cause of bearing misalignment in standard European imports.
Technical Specifications: PH-Side Series
| Parameter | Spesifikasi | Parameter | Spesifikasi |
|---|---|---|---|
| Torsi Masukan Maksimum | 2,800 Nm (Per Wing) | Rotor Phase Angle | 90° Offset (Timed) |
| Kecepatan Masukan | 300 – 450 RPM | Gear Module | Module 8 / Module 10 |
| Jenis Transmisi | Straight Spur / Helical | Bahan Gigi | 20CrMnTiH (Karburisasi) |
| Bahan Perumahan | Besi Cor Ulet QT450-10 | Housing Style | Vertical Top-Mount |
| Poros Masukan | DIN 5480 Spline | Antarmuka Keluaran | Integrated to Trough |
| Bearings (Input) | Spherical Roller (22212) | Bearings (Rotor) | Deep Groove 6312 / Tapered |
| Pelumasan | Semi-Fluid Grease (EP 00) | Kapasitas Minyak | 12L – 18L (Trough Dependent) |
| Sistem Penyegelan | Segel Kaset + Pelindung Baja | Stone Guard | Integrated Labyrinth |
| Cooling Fins | Extended Vertical Ribs | Peringkat Termal | 90°C Continuous |
| Pola Pemasangan | OEM Specific (Maschio/Kuhn) | Berat | 55 kg (Gearbox only) |
| Cat | Epoxy Blue (RAL 5005) | Jaminan | 24 Bulan |
Engineering the “Trough” System
1. The “Zero-Phasing” Challenge
In a power harrow, adjacent rotors spin in opposite directions. The blades must pass within millimeters of each other to ensure complete soil breakup without collision. This requires Zero-Backlash Assembly. Our side gearboxes drive a train of satellite gears that are precision ground to DIN Class 6 tolerances. We use a proprietary jig-assembly method that locks the phase angle of each rotor during the housing bolt-up, eliminating the “blade click” often heard in inferior harrows.
2. Semi-Fluid Grease vs. Oil Bath
The gear trough (the long structural beam holding the rotors) flexes during operation. Traditional oil baths can leak if the gasket seal is breached by this flexing. EVER-POWER utilizes a specialized Thixotropic Semi-Fluid Grease (NLGI 00/000). This lubricant flows like oil when agitated by the gears to dissipate heat, but thickens when static to prevent leaks. This is crucial for the undulating terrain of Paraná, where machines operate at tilt angles >15°.
3. Bearing Survival Strategy
The lower rotor bearing is the most vulnerable point, submerged in abrasive soil. We do not rely on a single seal. Our “Fortress” Lower Housing features a triple-defense system: 1) An external steel labyrinth that physically blocks stones. 2) A Cassette Seal with integrated grease. 3) A secondary felt ring saturated in oil. This design has proven to extend rotor bearing life by 300% in abrasive quartz soils.
4. Module 10 Strength
For the Brazilian market, we have upgraded standard European Module 6 gears to Module 8 and Module 10. This thicker tooth profile drastically increases the bending strength. When a blade hits a hidden stump in a newly cleared field, the gear tooth absorbs the shock load without shearing. The gears are case-hardened to 60 HRC but retain a tough core to prevent brittle fracture.
Comparative Analysis: EVER-POWER vs. Standard Trough Drives
| Fitur | EVER-POWER Side Drive System | Standard OEM Trough |
|---|---|---|
| Gear Module | Module 8 / 10 (Heavy Duty) | Module 6 (Standard) |
| Pelumas | EP-00 Semi-Fluid Grease | SAE 90 Gear Oil (Leak Prone) |
| Perlindungan Segel | Cassette + Labyrinth Shield | Standard Lip Seal |
| Rotor Timing | Precision Ground (No Phasing) | Standard Hobbed (Loose) |
| Perumahan | Reinforced Ductile Iron | Pressed Steel / Grey Iron |
*Data derived from field tests in Goias, Brazil comparing service life.
Aplikasi Lokal: Agribisnis Brasil
Maize “Safrinha” (Second Crop)
The “Safrinha” corn crop requires a seedbed that retains moisture. Power harrows are preferred over tillers because they don’t invert the soil, keeping the moisture deep. Our Side Gearboxes are tuned for High-Speed Operation (400 RPM) to allow faster tractor travel speeds (up to 12 km/h), essential for covering huge hectares in the short planting window.
Stone Protection (Rio Grande do Sul)
In rocky southern fields, rotor jamming is a risk. While the central box has a clutch, the inertia of the gear train can still break teeth. Our Side Gearboxes feature a Shear-Spline Input. In a catastrophic jam, the inexpensive input coupler shears before the expensive gear train is damaged, acting as a mechanical fuse.
📒 Field Engineer’s Log: The “Leaking Trough”
“August 2024, Ponta Grossa. A customer with a 6-meter folding harrow complained that the side gearboxes were running dry. We inspected the machine. It was working on a steep hillside. The standard SAE 90 oil was flowing entirely to the downhill side of the trough, starving the uphill gears and leaking out of the breather due to hydrostatic pressure.”
“We drained the system and refilled it with our EP-00 Semi-Fluid Grease. We also installed pressure-relief breathers on both ends of the wing. The grease stayed distributed across all gears regardless of the tilt angle. The overheating stopped immediately, and the leakage vanished. The customer saved $5,000 in potential gear replacement costs.”
Pertanyaan yang Sering Diajukan (OEM/B2B)
1. Can I replace just the Side Gearbox without replacing the Trough gears?
Yes, the Side Gearbox (Input Box) is a modular unit bolted to the top of the trough. However, you must check the backlash of the first trough gear. If it is worn, mating a new gearbox pinion to an old gear will result in noise and premature failure.
2. What grease do you recommend for the trough?
We specify Lithium-based Semi-Fluid Grease with EP (Extreme Pressure) additives, NLGI Grade 00 or 000. Typical quantity is 12kg for a 3m trough. Do not use standard chassis grease (NLGI 2) as it will tunnel and cause cavitation.
3. Are your gears compatible with Kuhn/Maschio harrows?
We manufacture aftermarket replacement gears and complete side boxes compatible with major brands like Maschio, Kuhn, and Alpego. We need the tooth count, module, and shaft spline dimensions to confirm the exact match.
4. How do you prevent the side gearbox from overheating?
Our side gearboxes feature vertical cooling fins that utilize the “chimney effect” for passive cooling. For extreme duty (24h operation), we offer finned aluminum top covers to further dissipate heat.
Complete Your Harrow Drivetrain
Central Splitter Boxes
The main input hub for folding harrows. Up to 300HP capacity.
Quick-Fit Tines
Tungsten-carbide coated blades for maximum wear life in abrasive soil.
Cross Drive Shafts
Splined shafts connecting center to side boxes. Balanced for high speed.
Precision Engineering for Brazilian Fields
Ensure your power harrows run cooler, longer, and stronger with EVER-POWER Side Gearboxes.
© 2026 EVER-POWER Transmission. Semua Hak Dilindungi Undang-Undang.
Major Markets: Brazil, Italy, Poland, USA, Turkey.
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