The “One-Pass” Revolution: Why Splitter Boxes Matter
In the massive soybean and corn fields of Central Brazil (Mato Grosso, Goiás), the window for planting the second crop (“Safrinha”) is incredibly tight. Farmers cannot afford multiple tractor passes. The industry standard has shifted to Combined Tillage Machines (Implementos Combinados). These leviathans perform subsoiling, harrowing, and sometimes seeding in a single pass, pulled by 350HP+ tractors.
The critical component enabling this is the Splitter Gearbox (Caixa de Distribuição de Potência). This isn’t just a reducer; it is a central command node. It receives the massive input torque from the tractor and splits it into multiple paths: driving the left and right rotary harrow wings, powering a rear PTO for a pneumatic seeder, and sometimes driving hydraulic pumps for vacuum fans.
EVER-POWER's SP-Series Splitter Boxes are engineered for this exact “Multi-Tasking” environment. Unlike standard T-boxes that overheat under continuous multi-output load, our units feature an integrated oil circulation system and High-Contact Spiral Bevel Gears capable of handling 3000Nm of input torque without thermal runaway, ensuring the machine stays in the field, not the workshop.
Technical Specifications: SP-Series (Splitter / Distributor)
| Parámetro | Especificación | Parámetro | Especificación |
|---|---|---|---|
| Max Input Power | 180 HP – 450 HP (132-335 kW) | Tipo de engranaje | Bisel espiral (pulido Gleason) |
| Velocidad de entrada | 1000 RPM (Estándar) | Eje de entrada | 1-3/4″ Z20 o 1-3/8″ Z21 |
| Configuración | 1 Input / 2-4 Outputs | Side Outputs | DIN 5480 Spline (Flanged) |
| Eje pasante | Yes (Rear PTO for Seeder) | Material de la carcasa | Hierro dúctil QT500-7 |
| Opciones de ratio | 1:1 / 1:1.18 / 1:1.35 | Capacidad de par | 3,500 Nm (Continuous) |
| Lubricación | Pressure Lube or Oil Bath | Capacidad de aceite | 8.0 Liters – 12.0 Liters |
| Tipo de rodamiento | Heavy Tapered (Timken/SKF) | Enfriamiento | Integrated Fins + External Port |
| Caza de focas | FKM (Viton) de alta temperatura | Material del engranaje | 17CrNiMo6 (Case Hardened) |
| Clasificación térmica | 110°C Max | Reacción | Precision Grade (< 0.15mm) |
| Peso (seco) | 90 kg – 160 kg | Montaje | Center Base 6-Bolt |
| Pintar | High Heat Epoxy | Garantía | 24 meses |
| Solicitud | Folding Harrow / Combo Seeder | Phase Timing | Synchronized Outputs |
Engineering the “Power Hub”
1. The 350HP Heat Problem
Transmitting 350HP through a compact gearbox generates immense heat due to efficiency losses (approx 2%). That’s nearly 5kW of heat energy—enough to boil the oil in 30 minutes in the Mato Grosso sun. EVER-POWER implements a “Volume-Flow” Cooling Design. The casing holds 12 Liters of oil (vs 8L standard) and features external ports for an optional oil cooler pump, essential for 24-hour planting operations.
2. Perfect Phase Synchronization
On a folding power harrow, the left and right wings must spin in perfect unison. If the splitter box has internal backlash variation, the rotors can collide in the center overlap zone. We use Ground Spiral Bevel Gears (DIN Class 5). The gear sets are matched and lapped to ensure zero phase difference between the left and right output shafts, preventing catastrophic implement self-destruction.
3. The Through-Shaft Backbone
Modern Brazilian planters utilize a rear-mounted air seeder. The splitter box must drive the side harrows AND pass power through to the rear fan. We use a Solid 42CrMo4 Through-Shaft. Unlike split-shaft designs, our solid shaft runs through the entire gearbox, ensuring that the heavy rear load doesn’t stress the internal bevel gear carrier bearings.
4. Spline-Drive Connections
Keyed shafts cannot handle the oscillating torque of a power harrow. They shear. We exclusively use DIN 5480 Involute Splines for all output connections. This distributes the torque load across 20+ teeth rather than a single keyway, virtually eliminating shaft fretting and failure even after 5,000 hours of heavy tillage.
Comparative Analysis: Splitter Box vs. Independent Drives
| Característica | EVER-POWER Splitter System | Independent Hydraulic Motors |
|---|---|---|
| Eficiencia | High (96-98% Mechanical) | Low (75-80% Hydraulic) |
| Synchronization | Perfect (Mechanically Locked) | Variable (Requires Flow Dividers) |
| Heat Generation | Manageable | Very High (Needs massive coolers) |
| Costo | Moderado | Muy alto |
| Mantenimiento | Oil Change | Hose/Pump/Filter replacement |
*Data based on fuel consumption analysis of 6m seeders in Paraná.
Aplicación localizada: Agronegocios en Brasil
Wide-Area Tillage (Goiás)
Farms here average 5,000 hectares. Equipment must run 24/7 during planting. Our Splitter Gearboxes are designed with Oversized Bearings (L10 Life > 10,000 hours) to survive multiple seasons of continuous operation without overhaul.
Cumplimiento de seguridad (NR-12)
The central gearbox is surrounded by moving shafts. In compliance with Brazil’s strict NR-12 norm, our gearboxes feature Integrated Shield Mounting Bosses. These allow the OEM to bolt on rigid steel safety guards directly to the gearbox, ensuring no rotating parts are exposed to the operator.
📒 Field Engineer’s Log: The Meltdown in Mato Grosso
“November 2025, Lucas do Rio Verde. A client with a new 8-meter folding harrow called us. Their central Italian-made gearbox was smoking. Thermal gun read 135°C. The oil had carbonized.”
“The issue? They were running at 400HP input, slightly above the box’s passive cooling limit. The ambient air was 38°C.
Solution: We retrofitted the unit with our SP-450 ‘Cool-Run’ Gearbox which has a port for an external oil pump. We connected a small 12V DC oil cooler fan. The operating temp dropped to a rock-steady 85°C. The client finished planting 3,000 hectares with zero downtime.”
Preguntas frecuentes (OEM/B2B)
1. Can this gearbox handle a 1000 RPM PTO input?
Yes, the SP-Series is optimized for 1000 RPM input to reduce torque load on the input shaft. We also offer 540 RPM versions, but for high-horsepower (>150HP) applications, we strongly recommend 1000 RPM.
2. Is the rear PTO output independent or clutched?
The rear PTO through-shaft is typically direct-drive (live). It spins whenever the input shaft spins. However, we can integrate a hydraulic disconnect clutch for specific OEM requirements if you need to turn off the seeder fan while the harrows continue running.
3. What is the spline standard for the side outputs?
We use the DIN 5480 standard (involute spline) for all high-torque side outputs. This offers superior load distribution compared to the older SAE square splines, which tend to rattle and wear out in heavy-duty applications.
4. Do you supply the cross-shafts to connect to the side wings?
Yes, we offer complete drivetrain packages including the Splitter Box, the balanced Cross-Shafts (with overload clutches), and the Side Wing Gearboxes, ensuring a perfectly matched system.
Complete Your Combined Machine
Side Wing Gearboxes
High-torque reduction boxes for the folding wings. Matched ratio to the splitter.
Cam-Clutch Shafts
Automatic reset clutches to protect the splitter box from wing jams.
Oil Cooling Kits
12V pumps and radiators for extreme duty cycles in hot climates.
Powering the Giants of Agriculture
From 3m rigid tillers to 8m folding seeders, EVER-POWER has the splitter box solution.
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