Engineered for the demanding wet-harvest conditions of the UK and Northern Europe. The ultimate torque solution for gathering chains and snapping rolls.
The Heart of Your Maize Header: Why Gearbox Reliability Matters
In the timeline of a Suffolk or Lincolnshire harvest, a jammed row unit isn’t just a mechanical failure—it’s a profit leak. The Row Unit Gearbox is the critical kinetic bridge in your corn head. It takes the rotational energy from the main driveshaft (often running at 500–700 RPM) and redirects it 90 degrees to power two synchronized systems: the gathering chains that pull the stalks in, and the snapping rolls that strip the ears.
Unlike standard general-purpose gearboxes, Ever-Power’s agricultural gearboxes are calibrated for the “Shock Load” reality of modern farming. When your header hits a patch of dense, damp crop or an unexpected stone, the gearbox must absorb that energy without shearing teeth or blowing seals. We don’t just build gears; we build harvest insurance.
Technical Specifications: Engineering Grade Data
| Paramètre | Valeur de spécification | Paramètre | Valeur de spécification |
|---|---|---|---|
| Vitesse d'entrée (Max) | 1000 RPM | Output Torque (Continuous) | 450 Nm |
| Rapport de transmission | 1:1.12 / 1:1.35 (Customizable) | Matériau du boîtier | Fonte ductile QT450-10 |
| Matériel d'équipement | 20CrMnTiH (carburé) | Profil de l'arbre d'entrée | Hexagonal 22mm / 28mm |
| Profil de l'arbre de sortie | Tapered Spline DIN 5480 | Type de lubrification | Oil Bath (SAE 85W-140) |
| Capacité pétrolière | 0.45 L – 0.65 L | Indice de protection thermique | 12 kW at 20°C ambient |
| Température de fonctionnement | -20°C à +110°C | Niveau sonore | < 78 dB at full load |
| Type de joint | Double Lip NBR / Viton (Optional) | Durée de vie des roulements (L10) | > 5000 Hours |
| Contrecoup | 6 – 10 arcmin | Dureté de surface | 58-62 HRC |
| Dureté du noyau | 30-40 HRC | Revêtement de peinture | Epoxy Powder Coat (Black/Green) |
| Protection contre les infiltrations | IP65 (Dust/Water Jet) | Type de respirateur | Spring-loaded pressure relief |
| Poids (à sec) | 22.5 kg | Modèle de montage | 4-Bolt Flange (M12) |
| Efficacité | 96% | Facteur de service | 1.5 (Ag Standard) |
| Input Orientation | Horizontal | Output Orientation | Vertical Down |
| Clutch Compatibility | Yes, Slip Clutch Integration | Safety Standard | ISO 4254-7 |
| Intervalle de maintenance | Check 50h, Change 500h | Vibration Limit | < 4,5 mm/s RMS |
Operational Physiology: Where it Fits
The row unit gearbox is mounted directly beneath the snout of each row unit on the corn header. It is the transmission hub. Inside, a high-precision bevel gear set converts the horizontal rotation of the header’s hex drive shaft into vertical rotation.
The Mechanics: The output shaft usually carries the gathering chain sprocket on top and connects to the stalk rolls below. This dual-action requirement means the gearbox must handle opposing forces simultaneously—the pulling tension of the chain and the violent crushing force of the rolls.
Adapted for the UK & European Terrain
Farming in the UK, particularly in regions like East Anglia or the South West, presents unique challenges compared to the dry plains of the US Midwest.
- High Moisture Tolerance: UK maize harvest often pushes into November. Our gearboxes feature upgraded Cassette Seals to prevent liquid mud ingress, a common killer of standard gearboxes in wet British autumns.
- Tough Stalk Varieties: European silage maize varieties are often denser. We use oversized bearings to handle the increased radial load required to snap these greener, tougher stalks without jamming.
UK & EU Regional Compliance & Standards
At Ever-Power, we don’t just ship boxes; we ensure compliance. Our drive systems are fully aligned with the Règlement de 2008 sur la fourniture de machines (sécurité) (Royaume-Uni) et le Directive européenne 2006/42/CE relative aux machines.
Market Benchmark: Ever-Power vs. Standard OEM Replacements
Disclaimer: The following comparison is based on internal lab testing and customer feedback data collected 2023-2024. Competitor names are omitted to focus on technical disparities.
| Fonctionnalité | Série Ever-Power X | Typical Aftermarket Generic |
|---|---|---|
| Matériel d'équipement | 20CrMnTiH + Shot Peening | Standard 20Cr Steel |
| Oil Seal Tech | FKM (Viton) Triple Lip | Standard NBR Single Lip |
| Heat Dissipation | Enhanced Fin Design (+15% Area) | Standard Smooth Housing |
| Garantie | 18 mois | 6-12 Months |
Engineer’s Notebook: Designing for “Dirty” Torque
Reflecting on the 2024 Redesign:
When we analyzed returned units from the 2023 harvest in Lincolnshire, we noticed a pattern: Micro-pitting on the drive side of the bevel gear. This wasn’t a load issue; it was a lubrication starvation issue during steep incline harvesting.
The Fix: We re-engineered the internal oil channels. Instead of relying purely on splash lubrication, we introduced a “catch-and-drip” channel cast into the upper housing. This ensures that even when the harvester is tilted 15 degrees on a hillside, the upper pinion bearing remains submerged in an oil film. It’s a small casting change that doubled the bearing life in field tests.
— Lead Transmission Engineer, Ever-Power R&D
Rapports de terrain : Solutions globales
🇬🇧 Location: Norfolk, United Kingdom (Sugar Beet & Maize rotation)
Problème: “The mud here acts like grinding paste. We were blowing input shaft seals every 200 hours on our 8-row header.”
Solution Ever-Power : “We deployed our ‘Wet-Field’ spec box with a shrouded seal protector. The customer reported zero seal failures across the entire 600-hectare harvest this season.”
🇩🇪 Location: Bavaria, Germany (Biogas Maize)
Problème: “We run at high speeds for biogas production. The heat buildup was cooking the oil in our OEM boxes.”
Solution Ever-Power : “Switched them to our High-Fin housing design with synthetic oil pre-fill. Operating temperature dropped by 12°C, stabilizing oil viscosity.”
🇫🇷 Location: Normandy, France
Problème: “Stones. We hit flint constantly. The shock loads were shearing the keys on the input shafts.”
Solution Ever-Power : “Upgraded the shaft material to 40CrNiMo with a toughened core. Now, if a stone hits, the slip clutch activates before the shaft deforms.”
🇵🇱 Location: Greater Poland Voivodeship
Problème: “Sourcing replacement parts for older headers was taking weeks. We needed a universal fit.”
Solution Ever-Power : “Provided our modular mounting kit. The customer retrofitted their entire 2010 fleet in one weekend.”
🇮🇹 Location: Po Valley, Italy
Problème: “Vibration issues on the outer rows of wide 12-row headers.”
Solution Ever-Power : “Our precision-ground gear sets (DIN Class 6) reduced transmission vibration by 40%, smoothing out the header operation.”
Don’t Neglect the Link: PTO Shafts & Accessories
A gearbox is only as good as the power delivered to it. The Arbre de prise de force is the lifeline between your tractor and the implement. If your PTO shaft has worn universal joints or a bent profile tube, it transmits damaging vibration directly into the gearbox input shaft, shortening its life by half.
We Supply the Full Drivetrain:
Torque limiters to protect gears from rock ingestion.
⚠️ When Should You Replace Your Row Unit Gearbox?
Don’t wait for a catastrophic failure mid-harvest. Look for these signs during your pre-season check:
- 🔊 Whining Noise: Indicates gear mesh wear or improper backlash.
- 💧 Oil Seepage: Wetness around the input shaft means the seal lip is compromised.
- ↔️ Excessive Play: If you can rotate the input shaft more than 15 degrees without output movement, your gears are stripped.
- 🔥 Surchauffe: If the box is too hot to touch (>80°C) after a short run, internal friction is critical.
Frequently Asked Questions (B2B & Technical)
How do I identify the correct replacement gearbox for my Geringhoff header?
Look for the ID tag on the housing. If it’s worn off, measure the bolt pattern spacing and the input shaft diameter (usually hexagonal). Send us photos via our quote form—our engineers can ID most units visually.
What is the lead time for shipping 50 units to the UK?
For standard models, we keep stock in our distribution hub. Air freight to London/Manchester takes 3-5 days. Sea freight for bulk orders typically takes 25-30 days to Felixstowe.
Can you customize the gear ratio for higher speed harvesting?
Yes. We can alter the bevel gear set to provide a “speed-up” ratio (e.g., 1:1.15) for modern high-horsepower combines, allowing faster ground speeds without clogging.
Do these gearboxes come pre-filled with oil?
Shipping regulations often require us to ship dry. However, we include a tag specifying the exact volume and grade (usually SAE 90 or 85W-140) required before operation.
How does your warranty handle seal failures in wet conditions?
Our warranty covers manufacturing defects. However, we highly recommend our “Amphibious” seal kit upgrade for customers in high-rainfall regions like the UK or Ireland to ensure longevity.
Are the input shafts interchangeable between hex and spline?
The shafts are integral to the gear in most designs. You must specify your drive system type (Hexagonal or Splined) at the time of order. We manufacture both.
What is the torque rating compared to OEM parts?
Our ‘Heavy-Duty’ line is rated for 20% higher intermittent torque loads than standard OEM specs, achieved through higher grade steel and heat treatment processes.
Where can I buy spare parts like gears or seals later?
We are a one-stop shop. We supply full rebuild kits (bearings, seals, shims) for every gearbox we sell, ensuring your maintenance team can repair rather than replace if desired.
Ready to Secure Your Next Harvest?
From single replacements to bulk OEM supply, Ever-Power has the engineering depth and inventory to keep your combine running. Don’t let a gearbox be the bottleneck.
édité par gzl
