The U 622 light disc harrow is engineered for small and medium-sized farms, where lower-power tractors are available. Notable features include its compact design, reduced weight, and cost-effectiveness. The unit is distinguished by the mounting of discs on vibrating springs, making it ideal for weak and medium soils. It effectively follows the field surface and mixes crop residues with the soil. Available widths are 2.5 m, 2.7 m, and 3.0 m, with disc diameters of 510 mm or 560 mm.
Lightweight in construction, durable and robust in operation
Compact dimensions, lightweight, and low maintenance costs
The small harrow combines high-speed shallow cultivation with effective compaction. A robust spring, measuring 13 mm x 100 mm, allows for aggressive penetration of the discs, adjustment to uneven terrain, and protection of the entire structure from damage. The standard disc hub is based on tapered roller bearings and requires lubrication every 150 hectares for a 3 m working width. Optionally, SKF tapered roller bearings that require maintenance or maintenance-free AgriHub and SKF disc hubs can be installed. During tests on light and medium soils, the machine, based on two rows of discs mounted on a leg that also serves as a safety spring, proved comparable in performance to machines with rubber protection used by the company for many years.
A straightforward and efficient disc harrow
The harrow discs are effective not only in shallow stubble cultivation but also in soil preparation for sowing. The light disc harrow exhibits features that enable it to efficiently mix soil with manure or significant amounts of organic matter. With minimized adjustment and lubrication points, both operation and maintenance are simplified to manageable tasks. Beyond the primary working section— the discs— the cultivation roller is crucial. It sets the working depth of the discs and significantly influences the final cultivation outcome. The machine comes standard with a Ø500 mm pipe roller.
Machine construction
1. Rear LED lighting beam
Optionally, the LED lighting beam can be equipped with a license plate frame with illumination for machines that will be registered at the transport office.
2. Three-point linkage
The massive suspension system serves as a supporting element of the mulching harrow. The solid tower of the three-point suspension system makes the machine durable and resistant to loads.
3. Working elements
Standard harrow disc with aggressive tine 560 mm, manufactured by OFAS. Basic thickness 4 mm, with options for 5 mm and 6 mm. Additional disc shapes available: smooth, fine-tooth, ALFA disc.
4. Bearing of working discs
Fully integrated disc bearing system, permanently lubricated and sealed.
5. Spring protection
The U 622 light disc harrow features robust springs securing each disc. These springs are reinforced and stabilized from beneath the frame with a specialized plate.
6. Side leveling covers
The use of side levelling covers retains the cut and mixed straw within the unit, preventing the formation of mounds and ruts during subsequent passes.
7. Hinge of the outer disc
The U 622 light disc harrow, with a working position width exceeding 3.0 meters, features two hinges—one on each side. When adjusted to the transport position, these hinges ensure the width does not surpass 3.0 meters, facilitating the transport of agricultural equipment on public roads.
8. Tillage roller
To cultivate the soil effectively, selecting the appropriate tillage roller is essential. The choice depends on the soil type and the desired outcome. Each roller variant is designed for specific working conditions.
9. Mechanical adjustment of working depth
The standard mechanical working depth adjustment is user-friendly and tool-free.
10. Spring comb beam
The spring comb beam mounted behind the tillage roller enhances cultivation by providing superior starting conditions for sown plants. This tool enables better management of crop residues by distributing them evenly across the entire width of the cultivation.
11. Quality steel
Achieving a high-quality final product necessitates the use of superior metallurgical materials; therefore, in manufacturing the agricultural machine frame, we utilize fine-grained Swedish steels S500MC and S700MC.
12. Laser processing of sheets, tubes, and profiles
The application of laser techniques in the production of agricultural machinery facilitates precise cutting in high-quality, hard sheets, where conventional chip drilling methods are challenging and costly.
13. Steel shot blasting and powder coating
Odpowiednie przygotowanie detali maszyn w połączeniu z malowaniem proszkowym sprawia, że otrzymana powłoka jest trwała i wytrzymała. Nie trzeba się martwić dodatkową konserwacją czy skomplikowaną pielęgnacją.
14. Robotic welding
The precision and repeatability of machine components are ensured by automatic welding, guaranteeing the highest quality component manufacturing for you. Our advanced robotic devices enable us to perform the most demanding welding tasks.
Equipment
standard
- Toothed disc with a diameter of 510 mm made o f boron steel 45-48 HRC, ZVL PREMIUM tapered discs bearing, (lubrication every 150 ha for 3,0 m machine width) spring shock absorber and pipe roller Ø 500 mm. On Customer's request, smooth disc or fine toothed disc can be mounted.
Equipment
optional
- Discs with a diameter of 560 mm (boron steel 45-48 HRC)
- Discs OFAS Italy diameter of 510 mm (hardness 48-52 HRC)
- Discs OFAS Italy diameter of 560 mm (hardness 48-52 HRC)
- Tapered bearings SKF
- Maintenance-free AgriHub hub
- Maintenance-free SKF hub
- Spring comb beam
- ALFA disc 560 mm x 5 mm
- Delimbe aftercrop seeder
- APV aftercrop seeder
- Side leveling cover (left side)
- Front reflective plates
- Rear LED lighting beam
- Maintenance-free roller bearing units
Tillage rollers
optional
- String roller with flat bars Ø 460 mm
- String roller with cogged bars Ø 460 mm
- Packer cogged roller Ø 460/550 mm
- Tubular-ring roller Ø 450 mm
- Crosskill roller Ø 400/500 mm
- Ring roller Ø 500/600 mm
- Spring roller Ø 470/550 mm
- Rubber roller Ø 500 mm
- Tire roller Ø 600 mm
- Roller of steel rings 48-52HRC Ø 600 mm
- Spiral roller Ø 455 mm
- T-ring roller Ø 500/600 mm
- U-ring roller Ø 540 mm
- Prismatic roller ORION Ø 500 mm
Most frequently chosen accessories
Cultivation tools
Spring comb beam
The manufacturer optionally installs a beam with a spring comb behind the disc section, ensuring the straw is evenly spread across the field's surface, thereby preventing areas of high straw accumulation that hinder proper cultivation. Uniform straw distribution is crucial, as it ensures consistent development conditions for the next crop across the entire field. The spring comb is an effective tool that enhances cultivation, offering optimal starting conditions for sown plants.
APV aftercrop seeder
We equip our cultivation machines with catch crop seeders in partnership with specialists from APV, who provide a wide range of catch crop and fertilizer seeders. The complete product range and available accessories can be found on the manufacturer's website (https://en.apv.at). Utilizing APV catch crop seeders on Rolmako cultivation machines reduces unnecessary travel. APV devices ensure precise spreading of catch crops and subsowing, even in the smallest doses.
Tillage rollers
Kneading, compacting the soil, crushing clods, and leveling the field surface are the final stages of cultivation, performed by the rear roller following the working tools of the cultivation machines. The selection of the appropriate cultivation roller significantly impacts the entire work process and the functionality of the cultivation machine. At Rolmako, we offer a variety of cultivation rollers that differ in shape, material, external diameter, weight, and, most importantly, cultivation purpose. The choice of roller depends on the soil type and the desired cultivation outcome. Rolmako provides expert advisory services to ensure proper adjustment of the cultivation machine to the working conditions.
The primary properties
Concept of a light disc harrow
- Mounted disc harrow
- Lightweight lifting capacity for the lifter, robust machine frame
- Center of gravity close to the tractor
- Individual suspension of each disc with optimal field contour adjustment
- High crop throughput
- Maintenance-free spring-loaded safety mechanism
- Minimal lubrication points
- Minimal adjustment points
- No need to set the angle
- Simple mechanical adjustment of the working depth
- Low power requirement
- Competitive purchase price
Spring overload protection
13mm x 100mm springs enable vertical and lateral horizontal movement when overloaded. This flexibility permits the discs to reverse and pass over stones without affecting the working depth of other elements. The springs allow disc vibration to optimize performance in challenging conditions, reducing the risk of blockages. The cushioning is intended for breaking up and leveling dense vegetation cover, post-harvest work, and mixing organic matter, such as manure, into the soil.
Maximum lifespan of disc bearings
The elimination of hub maintenance requirements minimizes maintenance needs and conserves time. Standard hubs can be substituted with SKF original maintenance-free hubs, offering three times the service life of other solutions. SKF quality ensures enhanced reliability, increased efficiency, and reduced operating costs. The service life of SKF hubs is substantially higher than that of conventional bearings, achieving this with relatively low ownership and operating costs. Composed of 100% bearing steel, the hub optimizes machine uptime and reduces agricultural machinery service costs.
Utilization of various disc variants
The optimized angle of attack is identical for both rows of discs, ensuring the machine follows the tractor precisely. The quality of the steel and the extensive experience gained through many years of production by the Italian company OFAS guarantee a top-quality product that has been approved worldwide. Discs with an aggressive tine are primarily used for working in fields with substantial straw. The disc tines facilitate easier machine penetration in challenging dry conditions. Smooth and fine-toothed discs are designed for shallower pre-sowing cultivation. The ALFA disc delivers excellent results on stubble after corn harvested for grain.
Bearing units of the roller
By incorporating maintenance-free bearings into the tillage rollers, we minimize the required machine maintenance time. The ductile cast iron housing is four times more durable than its grey cast iron counterpart. The combination of top and internal sealing offers superior protection for agricultural use. Rolmako prioritizes the smallest machine elements in every project, significantly impacting maintenance time and reducing the costs and duration of agricultural equipment inspections.
Various configurations available
Extensive export experience has enabled us to craft an offer aligned with customer expectations. Numerous configurations and additional agricultural equipment options allow us to adapt the device to specific field conditions. Years of dedicated efforts by Rolmako employees in enhancing the company's products ensure we deliver the highest quality products to the most remote regions, where they have proven effective in diverse soil systems.
Oversized agricultural structures
Rolmako tillage machines distinguish themselves from competitors due to their superior weight. The company's development team designs agricultural equipment to endure the most challenging working conditions. Rolmako machines efficiently cultivate land in demanding regions worldwide without requiring additional loads. The substantial amount of steel in their construction makes these tillage tools robust, enabling the utilization of high-power modern tractors and ensuring long-term farm investment.
Steel offering a competitive advantage
Increasingly larger and more powerful agricultural tractors subject the structural elements of agricultural machinery to significant stress, pushing them to their operational limits. Modern agricultural structures are expected to demonstrate high resistance to loads and an extended service life. Achieving a high-quality end product necessitates the use of superior-quality steel in production. Accordingly, we utilize high-quality Swedish fine-grained steels S500MC and S700MC, as well as carbon and boron steels for heat treatment and the wear-resistant Hardox. The use of these high-quality steel products ensures our agricultural equipment is highly durable and capable of operating at high speeds with high surface efficiency.
Oversized agricultural structures
Rolmako tillage machines distinguish themselves from competitors due to their superior weight. The company's development team designs agricultural equipment to endure the most challenging working conditions. Rolmako machines efficiently cultivate land in demanding regions worldwide without requiring additional loads. The substantial amount of steel in their construction makes these tillage tools robust, enabling the utilization of high-power modern tractors and ensuring long-term farm investment.
Wózek LongSmart
Wymagania nowoczesnego rolnictwa, ciągniki rolnicze o dużej mocy, coraz krótsze terminy agrotechniczne zmuszają producentów maszyn uprawowych do projektowania urządzeń, których potencjał będzie mógł być wykorzystany w 100 %.System transportowy Long Smart jest kompatybilny ze wszystkimi wałami uprawowymi dostępnymi na liście wyposażenia dodatkowego dla brony talerzowej U 693. Składanie i rozkładanie wózka odbywa się za pośrednictwem dwóch cylindrów hydraulicznych.Pozycja transportowa niewiele różni się od pozostałych wózków dostępnych w ofercie. Różnice pojawiają się w pozycji roboczej, w której koła składają się w kierunku ciągnika, a cała masa wózka znajduje się nad elementami roboczymi kompaktowej brony talerzowej U 693. Korzyści płynące z tego rozwiązania to większy docisk do gleby każdego talerza, płynniejsza i bardziej stabilna praca oraz możliwość pracy z większymi prędkościami roboczymi.
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