Engineered for the intensive demands of Flevoland’s tulip fields and Kent’s dense apple orchards. Delivering precise airflow control with a robust 1:3 / 1:4.5 ratio switch and integrated safety overrunning clutch.
Engineering Precision for Air-Assisted Spraying Systems
In the specialized domain of air-blast sprayers, the gearbox is not merely a transmission unit; it is the heart of crop protection. The EVER-POWER 2-Speed Fan Speed Increaser Gearbox is specifically calibrated to sit at the rear of the sprayer, directly supporting and driving the axial fan. This unit transforms the standard 540 RPM input from the tractor PTO into the high-velocity 1,800–2,400 RPM output required to penetrate dense canopy layers in modern fruit growing and viticulture.
Designed to address the specific “Stop-and-Go” nature of Dutch intensive farming, this gearbox features a critical Neutral (N) position. This allows operators to disengage the fan while keeping the pump running for tank agitation during headland turns or transport—a mandatory feature for complying with EU environmental regulations regarding chemical drift and mixture consistency. Furthermore, the integrated Overrunning Clutch protects the tractor’s transmission from the massive inertia of 800mm+ fan blades during deceleration.
Technical Specifications Data Sheet
| Parameter Category | Specification Value |
|---|---|
| Rated Input Power | 45 kW (60 HP) @ 540 RPM |
| Max Input Torque | 890 Nm |
| Input Speed | 540 RPM (PTO Standard) |
| Gear Ratio (Low) | 1 : 3.5 |
| Gear Ratio (High) | 1 : 4.5 |
| Selectable Gears | Neutral / Low / High |
| Output Speed (Low) | 1,890 RPM |
| Output Speed (High) | 2,430 RPM |
| Input Shaft Profile | 1-3/8″ Z6 Spline (ISO 500) |
| Output Shaft Type | Flanged Hub / Cylindrical Keyed Ø35mm |
| Housing Material | Ductile Iron QT450-10 |
| Gear Material | 20CrMnTiH (Carburized & Quenched) |
| Gear Hardness | 58-62 HRC |
| Oil Capacity | 1.8 Liters |
| Lubrication Type | Oil Splash Bath (SAE 90 / ISO VG 220) |
| Operating Temp Range | -20°C to +110°C |
| Thermal Rating | 38 kW (Continuous w/o cooling) |
| Seal Material | Double-lip Viton (FKM) |
| Bearing Type | Tapered Roller Bearings (Heavy Duty) |
| Service Factor | 1.25 (AGMA Class I) |
| Noise Level | < 78 dB at 1m distance |
| Paint Spec | Epoxy Powder Coat (RAL 9005/3002) |
| Weight (Dry) | 32.5 kg |
| Mounting Bolt Pattern | 4 x M12 on Ø120mm PCD |
| Breather Type | Filtered Brass Breather Plug |
| Clutch Mechanism | Internal Overrunning Clutch (Free Wheel) |
| Shifting Mechanism | Manual Lever (Side Mounted) |
| Vibration Threshold | < 4.5 mm/s RMS |
| Design Life (B10) | > 5,000 Hours |
| IP Rating | IP65 (Dust Tight / Water Jet) |
Netherlands: The Polder Challenge
In the reclaimed polder lands of North Holland, air-blast sprayers operate in uniquely humid, saline environments. The soil is heavy clay. Our gearbox features reinforced Viton seals specifically to exclude the fine, abrasive marine silt that often contaminates standard NBR seals. The “Neutral” gear is essential here for compliance with Dutch surface water protection laws (Lozingenbesluit), allowing agitation without spraying near ditches.
UK & Europe: Hillside Orchards
For apple growers in Kent or vineyards in the Rhine Valley, operating on slopes puts variable load on the fan. Our internal gears utilize a 20° pressure angle with helix modification to ensure tooth contact remains optimal even under slight chassis torsion common in hillside operations. The overrunning clutch is calibrated to handle the high momentum of 900mm fans used in these older, denser orchards.
Market Comparison: EVER-POWER Advantage
While many European gearboxes prioritize lightweight aluminum housings, EVER-POWER insists on QT450-10 Ductile Iron. While this adds 4kg to the weight, it increases shock load resistance by 40%, a crucial factor when the sprayer hits a rut in a hardened tractor path. Additionally, our cooling fins are 25% deeper than the market standard, reducing operating temperature by 12°C during continuous summer spraying.
Compatible Replacement For:
- Bondioli & Pavesi Series 2090 (Check shaft specs)
- Comer Industries D-26 / D-27 Series
- Annovi Reverberi Fan Drive Units
- Ideal / Munckhof Sprayer Assemblies
Compliance & Regional Standards: UK & EU
Exporting machinery to the UK and EU requires strict adherence to safety and environmental directives. Our gearboxes are engineered to facilitate your machine’s compliance.
Safety: EU Machinery Directive 2006/42/EC
The integrated free-wheel (overrunning clutch) is a mandatory safety feature under the Directive for high-inertia implements to prevent “flywheel effect” accidents. Our units come with full certification documentation to support your Technical File.
UK Agricultural Safety (HSE)
Compliant with UK PUWER regulations regarding guarding interfaces. The input shaft is designed to mate seamlessly with CE/UKCA marked PTO shafts with standard safety cone guards.
Regional Crop Cycles
East Anglia (UK): Optimized for the heavy dust conditions of cereal farm margins.
South Holland (NL): Sealed against high-humidity greenhouse environments.
Normandy (FR): High-torque resilience for cider apple orchard maintenance.
Field Report: 5 Global Solving Cases
Case 1: The “Muddy Seal” Issue – Netherlands
Scenario: A tulip bulb farmer in Creil was replacing gearboxes every season due to seal failure caused by sandy liquid mud splashing up from low-profile tires.
Engineer’s Fix: “We analyzed the failed units and found the standard NBR seals were being eroded by the silica in the mud. We switched the client to our Custom Double-Lip Viton Seal with an external metal dust shield. Result: The test unit has now run for 3 seasons (approx. 1200 hours) with zero leakage.”
Case 2: The “Hillside Rattle” – UK (Kent)
Scenario: An orchard manager in Kent reported excessive vibration and noise when turning uphill with a full 2000L tank.
Engineer’s Fix: “The chassis flex was causing slight misalignment. Standard gearboxes use straight bevel gears which are sensitive to this. We supplied our Spiral Bevel Gear set (Gleason milled) which has a higher contact ratio. The noise dropped by 8dB, and the vibration threshold fell well below the 4.5 mm/s limit.”
Case 3: High Temperature Failure – Spain (Andalusia)
Scenario: Olive groves operating at 40°C ambient temp. Original aluminum boxes were overheating (115°C+), cooking the oil.
Engineer’s Fix: “We installed our Ductile Iron model with 30% increased Cooling Fin surface area. We also recommended switching to a synthetic ISO VG 220 oil. Operating temps stabilized at 85°C even in mid-afternoon heat.”
Case 4: The Broken Shaft – Poland
Scenario: Tractor PTO engaged too aggressively at high RPM caused input shaft shearing on a standard gearbox.
Engineer’s Fix: “While operator error was the root cause, we upgraded the customer to a shaft made from 20CrMnTiH with controlled carburization depth (0.8-1.2mm). This retains a tough core to absorb shock loads. No failures reported since.”
Case 5: Frozen Start-up – Canada
Scenario: Gearbox seals cracking during -15°C storage and subsequent spring start-up.
Engineer’s Fix: “Standard rubber becomes brittle below -10°C. We supplied low-temp resistant FKM compounds and advised a specific winterization protocol. The client appreciated the technical support as much as the hardware.”
Complete Drivetrain Solutions
A gearbox is only as reliable as the shaft driving it. We provide the complete connection from Tractor to Implement.
PTO Drive Shafts
Wide-angle (CV) joints for tight turning circles in orchards. Series 4, 5, and 6 available with friction clutch limiters.
Friction Clutches
External torque limiters to protect the gearbox from jam-ups. Essential for flail mower attachments.
Hydraulic Cylinders
For folding boom arms on large-scale sprayers. Precision honed for long seal life.
Why source from multiple suppliers? Consolidate your BOM with EVER-POWER.
Diagnostic Guide: When to Replace Your Fan Gearbox?
- 1. The “Whine” at High RPM: Indicates pitting on the bevel gear teeth (Case Hardening failure). If audible over the tractor engine, failure is imminent.
- 2. Oil Emulsification (Milky Oil): Signifies seal failure. If water has entered the bearings, a full replacement is often more cost-effective than a rebuild.
- 3. Excessive Backlash (>15 degrees): Indicates worn splines or gear teeth. This causes “hammering” on the PTO shaft, risking damage to the tractor output.
Frequently Asked Questions (B2B)
Q: What is the exact lead time for a custom ratio gearbox delivery to the Netherlands?
A: For standard ratios like 1:3.5, we stock components for rapid assembly, often shipping within 15 days. For custom ratios requiring new gear hobbing, the lead time is typically 35-45 days to Rotterdam port.
Q: Can I retrofit this 2-speed gearbox onto an older Munckhof sprayer?
A: Yes, absolutely. We provide a universal mounting plate adapter. You simply need to confirm your fan hub diameter (usually 25mm, 30mm, or 35mm) so we can supply the correct output bushing.
Q: How does the overrunning clutch protect my tractor PTO brake?
A: When you disengage the PTO, the heavy fan wants to keep spinning. Without our clutch, this inertia back-drives the shaft. Our clutch allows the fan to “coast” to a stop independently, preventing torque shock to your tractor’s internal PTO brake bands.
Q: Do you supply the PTO shaft with the gearbox as a bundle?
A: We highly recommend it. Pairing our gearbox with a matched EVER-POWER Series 4 or 5 PTO shaft ensures the shear bolt protection is perfectly calculated for the gearbox’s torque limit, offering the best system warranty.
Q: What is the recommended oil change interval for continuous orchard work?
A: For the first use (break-in), change at 50 hours. Afterward, for intensive Dutch or UK orchard cycles, we recommend changing every 500 hours or once per season, whichever comes first.
Q: Can you laser engrave our company logo on the housing for OEM orders?
A: Yes, for B2B orders over 50 units, we offer custom casting molds with your brand name embossed, or laser engraving on the ID tag for smaller batches. This helps build your brand authority.
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edit by gzl
