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In the livestock industry, forage quality directly determines milk yield, meat quality, and animal health. A high-performance grass cutting machine for animal feed is not merely a tool—it is the first and most influential step in the feed production chain. Poorly cut grass leads to uneven fermentation in silage, nutrient loss, and wastage. Tehold International has engineered a range of grass cutting machines that address the specific challenges faced by dairy farmers, beef ranchers, and commercial feedlot operators across diverse climates.
The global demand for mechanized forage harvesting is surging, driven by labor shortages and the need for consistent feed quality. Unlike generic mowers, a specialized grass cutting machine for animal feed must deliver a uniform chop length (typically 1.5 to 5 cm), maintain high throughput (2 to 15 tons per hour), and operate reliably in wet or dusty conditions. This article explores the engineering, selection, and operational aspects of these machines, positioning Tehold International as a trusted partner in livestock feed production.
The biological value of grass as animal feed hinges on two factors: digestibility and preservation. When a grass cutting machine for animal feed chops grass, it creates surface area for lactic acid bacteria to ferment during ensiling. If the particles are too long (>10 cm), air pockets remain, allowing aerobic spoilage and mold growth. If too short (<1 cm), the grass lacks structural fiber, leading to rumen acidosis in cattle.
Tehold International’s engineering team has determined that an optimal chop length of 3-4 cm for corn silage and 2-3 cm for alfalfa haylage maximizes both compaction density (achieving >750 kg/m³) and rumen health. Our machines achieve this through a unique shear-bar and drum design that cuts rather than tears the plant fibers. Tearing causes cell rupture that releases sugars prematurely, while clean shearing preserves nutrients until the silo is opened.
Understanding the anatomy of a grass cutting machine for animal feed helps operators maintain efficiency and troubleshoot issues. Tehold International’s models integrate the following critical sub-systems:
Pickup and Feed Rollers: Located at the front, these spring-loaded tines lift lodged or flattened grass from the ground. The feed rollers then pinch the material and propel it toward the cutting drum. Tehold uses polyurethane-coated rollers that grip slippery, wet grass without slipping, maintaining a consistent feed rate of 2-5 m/s.
Cutting Drum with Replaceable Knives: The heart of the machine. Our drum features 8 to 20 knives (depending on model) made of boron-alloyed steel with tungsten-carbide edges. The knives are reversible and can be sharpened in the field. The drum rotates at 1,200-1,800 RPM, delivering a clean cut with a power requirement of 30-150 HP. The clearance between the knives and the shear bar is adjustable from 0.5 mm to 2 mm – a tighter gap produces finer chops.
Blower and Discharge Chute: After cutting, the forage is accelerated by a heavy-duty blower fan and thrown into a trailing trailer or bag. Tehold’s blower design uses 6 paddles with an adjustable pitch, allowing the operator to change the throwing distance from 3 to 8 meters. This feature is invaluable when filling high-sided trucks or bunker silos.
Safety and Overload Protection: Our machines are equipped with a shear-bolt mechanism or a hydraulic slip clutch that protects the driveline from stones or foreign objects. This prevents catastrophic gearbox failure, reducing repair costs by up to 70%.
Hydraulic Lift and Steering: Modern grass cutting machine for animal feed units are trailed or self-propelled. Tehold offers both. The trailed models feature a hydraulic cylinder that lifts the pickup header for transport and a pivoting rear axle that follows narrow farm lanes.
Selecting the correct model depends on your acreage, tractor horsepower, and desired throughput. Below is a technical comparison of Tehold International’s popular forage harvester series:
Model | Working Width (m) | Capacity (t/h) | Required Tractor Power (HP) | Number of Knives | Chop Length Range (mm) | Weight (kg) |
|---|---|---|---|---|---|---|
TH-GC-180 | 1.8 | 3 - 5 | 30 - 50 | 12 | 15 - 60 | 520 |
TH-GC-220 | 2.2 | 6 - 10 | 55 - 80 | 16 | 10 - 50 | 780 |
TH-GC-260 | 2.6 | 10 - 15 | 80 - 120 | 20 | 8 - 40 | 1,150 |
TH-GC-300P (Pro) | 3.0 | 15 - 22 | 130 - 180 | 24 | 5 - 35 | 1,680 |
Note: Capacities are based on standing grass at 60% moisture and 30 cm height. Actual output varies with crop density and ground speed.
To get the most from your grass cutting machine for animal feed, Tehold International recommends the following protocols:
Sharp Knife Maintenance: Dull knives increase power consumption by 25% and produce ragged cuts. Sharpen knives after every 8 hours of operation. Tehold provides a proprietary knife sharpening jig that restores the factory bevel angle (25°) in under 5 minutes per knife.
Ground Speed Management: The ideal forward speed is 5-8 km/h for thin ryegrass and 3-5 km/h for thick, mature alfalfa. Using GPS speed monitoring, our machines provide real-time feedback to the tractor driver to avoid overloading the feed rollers.
Moisture Content Awareness: For silage, optimal moisture is 65-70%. If the grass is too dry (>75% DM), add water or molasses at the blower. Tehold’s optional moisture sensor alerts the operator when crop moisture deviates from the set range.
Seasonal Storage: After the cutting season, clean the machine thoroughly, grease all bearings, and coat the knives with anti-rust oil. Store the machine under cover to prevent UV damage to the rubber pickup tines.
Even the best grass cutting machine for animal feed can encounter issues. Here is a quick reference guide:
Problem | Probable Cause | Solution |
|---|---|---|
Grass not feeding evenly | Worn feed roller springs or low hydraulic pressure | Replace springs; check hydraulic valve settings |
Excessive vibration | Unbalanced cutting drum or bent shaft | Re-balance drum; straighten or replace shaft |
Chop length too long | Knife-shear bar gap too wide | Reduce gap to 0.8 mm; re-sharpen knives |
Blockage in discharge chute | Blower speed too slow or wet, matted grass | Increase PTO speed to 540 RPM; reduce feed rate |
Metal noise from drum | Stone or foreign object trapped | Stop immediately; shear bolt will break; clear debris |
Tehold International is integrating smart sensors into our grass cutting machine for animal feed. Our upcoming "SmartCut" system uses laser-based crop height measurement to automatically adjust the feed roller speed, maintaining a constant chop length even when field conditions vary. Additionally, we are testing an electric-hybrid version that uses regenerative braking from the tractor’s PTO to charge a battery pack, reducing diesel consumption by 12%.
Another frontier is the use of NIR (Near-Infrared) spectrometers mounted on the discharge chute. This system analyzes the protein and fiber content of the cut grass in real-time, providing a nutritional map of the field. Farmers can then segregate high-protein forage from low-protein batches, enabling precision feeding and reducing supplement costs. Tehold plans to release this technology in late 2027.
Q1: Can this machine cut wet or waterlogged grass?
A: Yes, Tehold's machines have high-clearance pickup tines and aggressive feed rollers that handle moist grass (up to 80% moisture). However, very wet grass may require a reduced ground speed to prevent blower blockages.
Q2: Is the grass cutting machine for animal feed suitable for corn or sorghum?
A: Yes, with a drum knife configuration. Corn requires heavier-duty knives and a wider shear bar gap (3-5 mm). We offer a conversion kit for corn silage that includes 6 additional heavy knives and a reinforced blower housing.
Q3: What is the recommended PTO speed?
A: All our trailed models are designed for 540 RPM or 1,000 RPM standard tractor PTO. Ensure your tractor matches the specified speed; running at higher RPM will not increase capacity but may cause over-speeding damage.
Q4: How often should I replace the rubber pickup tines?
A: Tines typically last 400-600 hectares under normal conditions. Inspect them daily for cracks or bends. Replace any broken tines immediately to prevent uneven pickup.
Q5: Does Tehold International provide spare parts worldwide?
A: Absolutely. We have regional warehouses in Nairobi, Bangkok, São Paulo, and Dubai. Most common wear parts (knives, tines, bearings) are stocked and can be air-freighted within 72 hours.
Investing in a quality grass cutting machine for animal feed is essential for any livestock operation aiming to maximize feed efficiency and profitability. Tehold International offers durable, high-capacity machines that deliver consistent chop quality, low maintenance, and excellent value. Our global service network and commitment to innovation ensure that your forage harvesting remains hassle-free season after season. Contact Tehold International today for a personalized recommendation and a demonstration video.
