Beschrijving
9GD-2.5 Trailed Single Knife Mower
Industrial-Grade Reciprocating Sickle Bar Mower for High-Yield Natural and Planted Forage Harvesting
15-35 kW (20-50 HP) Compatible
34 High-Carbon Blades
Independent Trailed Chassis
Product Overview: Precision Agronomic Harvesting
The 9GD-2.5 Trailed Single Knife Mower is engineered to deliver exceptional forage harvesting performance across vast agricultural landscapes. Designed specifically as a heavy-duty Sickle Bar Mower, it provides a highly efficient, clean-shearing action that preserves the nutritional integrity of natural grasses and planted pastures. Unlike power-intensive rotary systems, this implement operates on the principle of mechanical reciprocation, drawing minimal power from the towing vehicle. This allows operations to utilize smaller utility tractors ranging from 15 to 35 kW (approximately 20 to 50 horsepower) while still achieving a massive 2.5-meter cutting swath and processing up to 3.0 hectares per hour.
Structural integrity and operator convenience are at the forefront of the 9GD-2.5 design. The implement operates on an independent trailed chassis supported by pneumatic tires, fully isolating the 490 kg structural weight from the tractor’s three-point linkage. This trailed dynamic guarantees superior terrain tracking and eliminates the dangerous front-axle lift common when operating heavy side-mounted equipment on compact tractors. The integrated hydraulic lifting system allows the operator to instantly raise the cutter bar to avoid field debris or during headland turns directly from the cabin. Certified under the rigorous GB/T10940-2008 agricultural machinery standards, this mower guarantees unparalleled field longevity and precise stubble management.
Engineering Application Constraint: To maintain the micro-tolerances of the reciprocating blades, the 9GD-2.5 is strictly optimized for open terrestrial pastures. It is expressly not recommended for deployment in paddy fields, deep wetlands, dense forestry underbrush, or environments heavily populated with submerged boulders and large tree stumps.
Powertrain Selection Summary
Understanding the power dynamics of the 9GD-2.5 ensures optimal deployment within your existing agricultural machinery fleet.
- ► Low Power Draw Mechanism: The eccentric pitman drive efficiently converts rotational PTO energy into linear motion. This mechanical advantage allows a 25 HP tractor to perform the work of a 60 HP tractor utilizing a rotary mower.
- ► Standardized Input: Requires a standard rear Power Take-Off (PTO) operating strictly at 540 r/min. Avoid utilizing 1000 r/min splines to prevent destructive harmonic vibrations.
- ► Hydraulic Requirements: Demands only a single-acting rear hydraulic remote valve from the tractor to operate the primary lifting cylinder.
- ► Trailed Weight Distribution: Because the implement’s 490 kg mass is supported entirely by its own axle, tractor weight class is less critical than PTO horsepower, making it ideal for lighter, older utility tractors.
Verified Technical Specifications
| Item No. | Parameter Description | Unit of Measure | Technical Value |
|---|---|---|---|
| 1 | Model Designation | – | 9GD-2.5 |
| 2 | Tractor Linkage Type | – | Trailed (Drawbar) |
| 3 | Cutting Mechanism | – | Reciprocating Sickle Bar |
| 4 | Effective Cutting Width | M | 2.5 |
| 5 | Required Tractor Power | kW (HP) | 15 – 35 (20 – 50 HP) |
| 6 | Optimal Working Speed | km/u | 6 – 10 |
| 7 | Number of Moving Blades | stuks | 34 |
| 8 | Overall Dimensions (L x W x H) | mm | 2000 x 4300 x 950 |
| 9 | PTO Input Shaft Speed | toerental | 540 |
| 10 | Average Stubble Height | mm | 50 – 70 |
| 11 | Productivity Rate | hm2/h | 2.0 – 3.0 |
| 12 | Required Operators | Person | 1 (Tractor Driver) |
| 13 | Structural Mass (Weight) | kg | 490 |
Universal OEM Tractor Compatibility Disclaimer
The 9GD-2.5 Trailed Single Knife Mower utilizes globally standardized PTO splines and hydraulic quick-connect fittings. It is engineered to seamlessly integrate with a vast spectrum of international agricultural tractor brands. This includes, but is strictly not limited to, platforms manufactured by John Deere, New Holland, Kubota, Massey Ferguson, Case IH, Mahindra, and Fendt. The explicit mention of these commercial entities is provided solely as an operational reference to assist farm managers in procurement and fleet matching. It does not signify any direct trademark affiliation, sponsorship, or corporate endorsement.
Key Features & Engineering Advantages
Hydraulic Obstacle Avoidance
Equipped with a highly responsive heavy-duty hydraulic cylinder. When navigating unpredictable pastures, the tractor operator can instantaneously elevate the 2.5m cutting apparatus to clear sudden terrain changes, hidden rocks, or debris, drastically reducing the probability of catastrophic blade and ledger plate damage.
Nutrient-Preserving Shear
The mechanical scissor action of the 34 heat-treated carbon steel blades slices plant stems cleanly. Unlike rotary flails that pulverize and strip valuable leaves, this Trailed Single Knife Mower ensures delicate, high-protein leaf matter remains attached to the stem, maximizing the Relative Feed Value (RFV) of your harvest.
Floating Chassis Dynamics
The trailed architecture features dedicated pneumatic support wheels. This design isolates the tractor from vertical vibrations and ensures the cutter bar glides uniformly over field undulations. It maintains a strict 50-70mm stubble height, preventing soil contamination in the swath and promoting rapid secondary crop growth.
Eccentric Pitman Transmission
Power transfer utilizes a highly engineered eccentric wheel and pitman arm linkage. This reliable mechanical assembly converts the 540 rpm rotary input into high-velocity linear thrust. Protected by industrial-grade cast housings and grease fittings, it offers an exceptionally low failure rate under continuous operational stress.
Mower Component Details & Structural Design Concept
The engineering philosophy of the 9GD-2.5 is rooted in rugged simplicity. Drawing upon heavy-duty frame fabrication techniques utilized in commercial round balers, the main chassis is welded from thick-walled carbon steel tubing to resist torsional twisting when dragging a 2.5-meter implement across uneven ground.
The cutting mechanism is the heart of the machine. It utilizes forged ledger plates acting as stationary anvils against which the 34 serrated moving blades slice. A critical design feature is the spring-loaded breakaway latch located on the drawbar linkage. If the cutter bar strikes an immovable object with excessive force, this mechanical fuse trips, allowing the entire 2.5m bar to swing rearward, dissipating kinetic energy and preventing the main chassis or pitman arm from bending. Once the tractor stops and reverses slightly, the bar clicks back into the operational lock position.
Targeted Application Scenarios
Deploying the correct machinery for specific agronomic profiles is the key to farm profitability. The 9GD-2.5 excels in the following environments:
🌱 Sickle Bar Mower for High-Protein Alfalfa Harvesting
Alfalfa and clover are highly susceptible to leaf shatter. The clean shearing action prevents violent impact, ensuring delicate leaves remain attached to the stems for baling, securing premium dairy-market hay prices.
🌾 Trailed Single Knife Mower for Vast Natural Prairies
For operations managing thousands of hectares of native grasses, fuel economy is paramount. The 2.5m width combined with low 20-50 HP requirements drastically reduces diesel consumption per ton of forage harvested.
🐴 Precision Harvesting for Equine Nutritional Pastures
Horse feed must be exceptionally clean. By precisely maintaining a 50-70mm cut height, the mower avoids dragging soil into the windrow, ensuring a low-ash, dust-free final bale.
Competitive Advantage Matrix
| Evaluation Metric | Our 9GD-2.5 Sickle Bar Mower | Traditional Rotary / 3-Point Mowers |
|---|---|---|
| Power Consumption | Ultra-Low (15-35 kW). High Fuel ROI. | Extremely High (Requires 50-80+ kW for 2.5m). |
| Tractor Wear & Tear | Trailed load. Zero stress on 3-point linkage. | Heavy cantilevered weight causes front-axle steering loss. |
| Crop Regrowth Rate | Rapid. Clean scissor cut seals plant stems fast. | Slow. Bruised and shattered stems invite rot and delay recovery. |
| Operator Safety | Minimal projectile risk due to linear cutting. | High velocity rotary blades throw stones at lethal speeds. |
Kinematic Working Principle & Field Operation Flow
PTO Power Engagement
The tractor operator engages the rear PTO at exactly 540 r/min. Torque travels through a shielded driveline to the mower’s primary input gearbox.
Motion Translation
The gearbox powers an eccentric crank wheel via a heavy-duty belt or direct drive. This translates rotational energy into high-speed pushing and pulling forces.
Reciprocating Shear
The pitman arm drives the internal knife spine. The 34 blades violently slide over the stationary ledger plates, creating thousands of scissor actions per minute across the 2.5m span.
Crop Laydown
Cut forage falls backward over the low-profile cutter bar. The trailed wheels pass seamlessly, leaving a wide, aerated swath perfectly prepared for subsequent raking and baling.
Global Engineering Field Notes & Case Studies
[Texas, USA] Extreme Working Condition Practical Research
Client Profile: Commercial dryland hay producer. Objective: Maximize acreage cut per day using aging 35 HP tractor fleet in extreme 40°C heat.
“Our older tractors were overheating trying to run 2.0m rotary mowers. Moving to the 9GD-2.5 Trailed Single Knife Mower solved the thermal load issue instantly. We are cutting a wider 2.5m path, burning 30% less fuel, and the tractors run cool all day long.”
[Queensland, Australia] Off-Road Terrain Adaptation Guide
Client Profile: Massive Outback cattle station. Objective: Harvesting deeply rutted Mitchell grass pastures.
“The independent trailed tires are critical here. A 3-point mounted unit would literally bounce the front wheels of our utility tractors off the dirt. The 9GD follows the ruts beautifully, and the hydraulic lift lets us clear hidden termite mounds in a split second.”
[Mato Grosso, Brazil] Local Industry Application Cases
Client Profile: High-density tropical pasture contractor. Objective: Shearing thick, fibrous stems rapidly before monsoon rains.
“Tropical grasses have incredibly tough fibers. The 34 carbon blades on this sickle bar slice through it like paper. Maintenance is incredibly simple; we grease the pitman drive daily, and it just refuses to break down.”
[Bavaria, Germany] Precision Dairy Forage Research
Client Profile: Intensive dairy cooperative. Objective: Eliminating ash content in ryegrass silage.
“Controlling stubble height to exactly 60mm ensures we never cut into the dirt. The 9GD-2.5 provides clinical precision. Our laboratory tests show a massive drop in ash content in our fermented silage, leading to higher milk yields per cow.”
[Alberta, Canada] Short Season Harvesting Guide
Client Profile: Commercial alfalfa exporter. Objective: High-speed deployment across multiple scattered fields.
“The trailed format means hitching up takes exactly 3 minutes. Drop the drawbar pin, connect the PTO, plug in one hydraulic hose, and we are driving down the road. In a region where weather windows are measured in hours, this mobility is priceless.”
B2B Client Frequently Asked Questions (FAQ)
1. What is the container loading capacity for international bulk orders?
To minimize sea freight costs, the 9GD-2.5 is shipped in a partially disassembled, stacked configuration. A standard 20ft container can hold up to 16 units, while a 40ft High Cube container can accommodate 38 units. Final counts depend on spare parts included.
2. How does the breakaway latch reset after an impact?
When the implement strikes a boulder, the spring-loaded jaw releases, swinging the bar backward. To reset, the operator simply stops the PTO, reverses the tractor approximately 1.5 meters, and the bar geometrically clicks back into the locked, tensioned position automatically.
3. Can we operate the mower without connecting the hydraulic hose?
While the mower will mechanically cut grass without hydraulic pressure, you will lose all ability to lift the cutter bar over obstacles or for road transport. Operating without hydraulics engaged is strongly discouraged for safety and equipment preservation reasons.
4. Are the 34 cutting blades difficult to replace in the field?
No. The blades are affixed to the knife back utilizing heavy-duty rivets (or optional bolts). A single damaged blade can be punched out and replaced in under 5 minutes using standard hand tools, preventing costly harvesting delays.
5. Does this machine require a dual-clutch PTO?
A dual-clutch (live) PTO is highly recommended as it allows the operator to stop the tractor’s forward motion while the cutting blades continue to clear heavy crop blockages. However, due to its low power draw, a single-clutch tractor can be used with careful gear management.
6. Can the 9GD-2.5 harvest extremely lodged (flattened) crops?
Sickle bar mowers perform best on standing forage. If a crop is severely lodged due to heavy rain or wind, cutting efficiency decreases, and the bar may ride over the flattened material. In severely lodged conditions, tilting the cutter bar slightly forward via the adjustment link can improve pickup.
7. What maintenance is required for the eccentric pitman drive?
Daily maintenance involves applying lithium-based grease to the zerk fittings on the pitman ball joint and the eccentric bearing. Belts transferring power from the gearbox to the eccentric wheel should be checked weekly for proper tension (approx. 15mm deflection under thumb pressure).
8. Can I purchase agricultural gearboxes and PTO shafts directly from you?
Yes. As a primary manufacturer, we supply all agricultural machinery parts globally, including heavy-duty PTO drivelines, precision agricultural gearboxes, sprockets, and chains to support your entire fleet.
Critical Adjustments & Field Precautions
Operator diligence prevents downtime. Strictly adhere to these engineering guidelines:
- Knife Register Calibration: The stroke of the moving knife must be perfectly centered over the stationary ledger plates at both the extreme left and right dead-center positions. Misalignment causes poor cutting, clogging, and catastrophic pitman arm stress.
- Lead Adjustment: The outer shoe of the 2.5m cutter bar should have a slight “lead” (angled forward by approx. 20-30mm) compared to the inner shoe when stationary. Once in thick grass, structural drag will pull the bar into a perfectly perpendicular cutting angle.
- Operational Speed Limit: Do not exceed the maximum engineered speed of 10 km/h. Excessive speeds force the tractor to push the grass over before the reciprocating blades can shear it, resulting in a ragged, uneven stubble profile.
Market Trends & Economic ROI Analysis
In the context of rising global diesel prices and inflationary pressures on capital equipment, agricultural managers are shifting focus from high-horsepower rotary setups back to high-efficiency kinematic designs. The 9GD-2.5 Trailed Single Knife Mower represents this optimized paradigm. By leveraging a 2.5-meter cutting width with a power requirement as low as 20 HP, farm operators bypass the massive capital expenditure required to purchase 80+ HP tractors.
Return on Investment (ROI) Metrics: The ROI calculation for the 9GD-2.5 is aggressive and favorable. Compared to similarly sized rotary equipment, fuel consumption per hectare is reduced by an average of 40%. Furthermore, the clean-cutting preservation of high-protein leaf matter directly elevates the commercial sale price of the resulting hay bales. For an operation harvesting 200 hectares, the combined savings in diesel fuel, reduced tractor engine depreciation, and increased crop yield quality routinely amortizes the entire capital cost of the mower within 1.5 harvesting seasons.
Build Your Comprehensive Agricultural Workflow
As an integrated OEM manufacturer, we design machinery to work seamlessly together. Once your forage is perfectly cut with the 9GD-2.5, ensure it is packaged securely for transport and fermentation with our downstream industrial equipment:
Optimize Your Forage Harvesting Operations Today
From containerized bulk B2B shipping logistics to single-unit fleet upgrades, our engineering sales team is ready to assist. Secure your 9GD-2.5 Trailed Single Knife Mower before the next harvest season begins.
