Kverneland Qualidisc 21000 T
Trailed compact disc harrow in large working width of 12.25m, versatile and powerful
Highlights
Large performance at high speed Controlled Traffic Farming Ground Contour System High comfort with simple depth setting Long lifetime and reduced maintenanceDescription
With focus on sustainable and precision farming, Kverneland developed the trailed compact disc harrow, Qualidisc 21000 T, in working width of 12.25m. The Qualidisc 21000 T perfectly fits to Controlled Traffic Farming systems. The range of operations is versatile: shallow and deep cultivation (3 to 15cm), as well as seedbed preparation after ploughing.
The compact disc harrow, Qualidisc 21000 T, is arranged in four independently mounted frame segments. Pressure on each segment can be adjusted pair by pair via the Ground Contour System to ensure a constant pressure on the soil. Due to this unique ground following, the Qualidisc 21000 T leaves a perfectly even surface. The conical discs (Ø 600mm) are the same as on the Qualidisc Pro models ensuring a full cut and also offering excellent performance for catch crop incorporation. The short disc harrow operates at high speeds of up to 20km/h, maintaining a full cut at a consistent working depth in all soil conditions.
Features
The frame of the Qualidisc 21000 T is extremely sturdy and robust. The design has been optimized by FEM calculation for reliability & long lifetime. The frame is set up in 4 independent sections with 4 large front gauge wheels 400/60-15.5. This ensures a constantly very good ground following over the entire working width also in case of shallower working depth.
Ground Contour System
The pressure on the 4 sections is adjusted pair by pair by the Ground Contour System to achieve constant pressure on each section. Two manometers monitor the pair of inner and outer sections. The Qualidisc 21000 T excels by a high-speed stability without jumping effects due to the weight balance and distance from front gauge wheels and rear roller. The high frame clearance ensures blockage-free cultivation even in case of higher amounts of residues like maize straw.
Headland Management
Turning at the headland is easy and close. The implement turns on the front gauge wheels and rear roller. The four front wheels are very flexible and can be swiveled 360°, enabling close turning manoeuvres despite the large working width.
Due to the aggressive discs and the considerable weight (up to 150 kg/disc), the Qualidisc 21000 T ensure an excellent working quality even under dry conditions. The ground is completely cut, the stubble broken and correctly mixed on the surface for a good emergence of weeds and volunteer cereal seeds.
The large disc diameter of Ø600mm achieves high quality working results from 2cm to 15cm depth and allow operation also with big volumes of soil and residues (e.g. maize).
Long lasting discs with a constant cutting angle
The conical discs are of 6mm thickness and Ø600mm diameter. They are the same as on the Qualidisc Pro and ensure a constant cutting angle independent of depth and disc diameter.
The discs are given a special heat treatment for a long durability and strength with a very high hardness of 55-58 HRC. Thus the machine's longevity is increased and the maintenance costs reduced.
Standard and big notched discs
Alternatively to the standard discs, Kverneland proposes discs with big notches to enhance the rotation in fluffy soil and for a better self-cleaning of the disc with more than 20% of clay. Small notches on this disc keeps the very good cutting quality. A combination of standard disc in the front disc gang and big notched discs in the rear is also possible.
Adjusting a machine must be fast and easy, especially when working conditions change. Fields can vary due to different soil type, moisture, compaction or field traffic, etc.
The setting of the working depth on the Qualidisc T 12.25m is easily done. A pre-setting of the working depth is fixed at only two scales. One is mounted at the gauge wheel and the second at the rear roller, both directly on the left-hand side of the machine, where the driver leaves the cab. Gauge wheels and the rear roller are adjusted separately to maintain the balance between the two rows of discs. The depth adjustment is steered hydraulically from the cab. In this way, the working depth can be changed in a few seconds on the go, even if the driver is not skilled.
Connecting the Qualidisc 21000 T to the tractor is also straightforward. For the hydraulics, one double-acting valve is needed for the transport wheels. Another double-acting valve, or alternatively a load sensing system, is necessary to steer the folding process, the headland lifting and the pressure adjustment for perfect ground contour following.
Control Traffic Farming
Controlled traffic farming (CTF) is a management system to protect the soil against damages caused by heavy or repeated machinery passes.
It confines all machinery loads to the least possible area of permanent traffic lanes which are kept in exactly the same place over the years.
The main objective of Controlled Traffic Farming is to improve soil health as prerequisite of save crop establishment and yields. Healthy soil is characterized by a stable soil porosity with more space for water and air. Improved water infiltration reduces soil erosion and increases the water availability to the crop whereas the drainage capacity avoids waterlogging. All this will safeguard the supply of nutrients to the plants resulting in a strong crop rooting and plant development for safe yields.
Moreover, CTF extends the timeline of farming operation as the permanent tracks allow access to the field also when conditions are not perfect. Reduced fuel consumption and power requirement of the tractor, furthermore, increase efficiency and sustainability.
- Each angled arm is fitted with a large maintenance-free double ball bearing and 35 mm axle. This high-quality bearing is able to carry heavy radial and axial loads.
- Special protection on the side of the arm is achieved by a special seal of 5 sealing lips and by the joint protecting the bearing.
- On the other side the disc is protected against dust by an O-ring.
- The disc hub is fixed onto the arm by a bolt and special washers that prevent any loosening. The bolt is protected against soil by its position inside the arm.
Rear rollers
According to the soil specifications, the consolidation required, the mixing of the soil and straw, the surface of the soil requested and the lifting capacity available, Kverneland offers a choice of rear rollers.
-
Actipack roller Ø 560mm - 205kg/m
For medium to heavy soil conditions.
Also for wet, stony and sticky conditions because of the independent skids and knives.
Clod crushing and very firm recompaction of the soil. -
Actipress Twin Ø 560mm
Weight without soil: 220kg/m
Weight when full of soil: 250kg/m
U-profile for high carrying/rolling capacity in light soils.
Clod breaking also in heavy conditions.
High and homogenous consolidation.
Technical specifications
Technical specifications
Download brochureModel |
Qualidisc 21123 T |
Frame |
trailed (4 segments) |
Working / transport width (m) |
12.25 /2.95 (homologated model) |
Underbeam clearance (mm) |
810 |
Inter-row distance (mm) |
900 |
Ground Contour System |
standard |
Number of discs |
98 |
Disc diameter - hardness |
600x6mm - 215kg/mm² |
Disc spacing (mm) - 2 disc rows |
125 |
Working depth (cm) |
3-15 |
Depth adjustment |
Hydraulic by scale |
Linkage |
Cross shaft CAT IV, fixe eye ⌀50mm (only with drawbar extension) |
Pair of star disc |
Option |
Roller offering |
Actipack (ø 560mm), Actipress Single (ø 560mm), Actipress Twin (ø 560mm) |
Transport wheels |
560/60R22.5 (EU road homologation) or 710/50R26.5 |
Gauge wheels |
4×400/60-15.5 |
Frame box section |
round tube diameter 180x8mm and 150x150x10 (central frame) |
No. of double acting valves |
2 double acting valves + LS or 1 additional for GCS |
Brake |
hydraulic or pneumatic |
Total weight with Actipack (kg) |
14600 |
Total weight with Actipress Twin (kg) |
14800 |
Min. HP |
400 |
Max. HP |
650 |