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This power harrow ranges offer a working width from 2.50 m to 6 m. Rigid or foldable, they can be used in solo or combined with a seed drill. Discover the key to get an optimal seedbed in all conditions.
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The tine holders of the KUHN power harrows are positioned in a specific way to create a gradual soil mixing. This precise and exclusive design prevents the harrow from being affected by negative vibrations while reducing power consumption.
The height adjustment of the roller is easily done by means of limiting pins. Free to move downward, the roller retains all its grip, even if the machine was to lift slightly during work. The rounded shape of the pin and the stop ensures a large contact area.
The specific design of the side deflectors guide and channel the soil to ensure good finish between passes. Fixed on the HRB roller arms, the deflectors follow the working height of the roller. On the HR 1004 series, they are mounted on reinforced arms. The efficiency and quality of work are maintained even in stony conditions.
The powerful rotor drive is fully protected by a rigid gearbox and trough. The casing, bearings and tine holders form a compact and very sturdy assembly, limiting the torsion stress on the casing. The rotor has a high-rigidity, maintenance-free trough. The curved profile of the forged steel sprockets ensure that the gears are in line with the upper bearings. The maintenance free bearings create a permanent hold, eliminating any risk of play. The sealing is reinforced by a cassette seal on the HR and a lip seal on the HRB. The conical centering of the blade holder (KUHN patent) eliminates any risk of play in the splines. The blade holder is oval-shaped, avoiding blockages of stones and encouraging their evacuation.
The rotors are driven by large diameter gears. Therefore, the power transmission to the tines is through a large number of intermeshing teeth to transfer the torque loading.
Most KUHN power harrows are equipped with duplex gearboxes. Thanks to their interchangeable sprockets, you can choose the speed most suited to your needs. The entire driveline is protected by a cam type cut-out clutch.
On models with 4 and 5 m working width, the central frame is made with large section profiles ensuring good rigidity and high bending and torsion resistance. For even more simplicity and comfort, some models have hydraulic locking in transport position.
The central frame of the HR 6004 DRC power harrow is composed of a double front and rear frame made of large section rectangular profiles.
The high-capacity 3-point linkage, made from heat treated steel to reduce wear, pivot to allow the machine to follow the ground contours. The headstock is designed and made from steel plate formed and welded ensuring a high resistance.
The FAST-FIT tines are fitted as standard on the KUHN HR 104 & 1004 power harrow range. They have a bevelled and twisted shape that creates a fine tilth on the surface, perfect for germination even in difficult conditions (stony, hard and clay soils). They are also adapted to high groundspeeds.
The OPTIMIX tines feature an exclusive design which ensure a quality seedbed in stubble cultivations, subsoiled ground or following pasture regeneration. The aggressive design of the OPTIMIX tines ensure greater soil movement and a greater soil to residue mix.
To increase the service life, KUHN offers hard coated DURAKUHN tines.
For deeper cultivations, 36 cm extra long tines are also available for specialist crops.
A wide range of gear sets can ordered as an option to match your requirements. Also, the gears inside the duplex gearbox can be reversed to offer a wide range of speeds in order to adapt the crumbling intensity. The PTO input set towards the rear of the machine reduces the u-joint angle and makes it easier to lift the power harrow during headland turns.
KUHN folding power harrows can be used in rigid or floating position thanks to their articulated central frame. In just a few minutes, you can adapt the tool to the conditions and terrain by simply pivoting an oblong-holed plate.
All HRB 103 DR series and HR 1004 DR series models are equipped with standard height-adjustable side deflectors for improved adaptation to different working conditions. Articulated, they are fitted with spring safety incase of contact with an obstacle.
| HR 304 D | HR 404 D | HR 3004 D | HR 3504 D | HR 4004 D | HR 4504 D | HR 5004 D | HR 6004 D | |
|---|---|---|---|---|---|---|---|---|
| Working width approx. (m) | 3 | 4 | 3 | 3.5 | 4 | 4.5 | 4.95 | 6 |
| Overall width (m) | 3.12 | 4.11 | 3.08 | 3.5 | 4.1 | 4.55 | 5 | 6.21 |
| Transport width (m) | 2.67 harrow solo (2.51 with rollers raised) | 2.80 (2.52 with rollers raised) | ||||||
| Maximum tractor power (kW/hp) | 184/250 | 265/350 | ||||||
| Maximum tractor power (kW/hp) at 1000 min-1 | 139/190 | 139/190 | 184/250 | 184/250 | 184/250 | 184/250 | ||
| Minimum power requirement (kW/hp) | 96/130 | 130/180 | ||||||
| Minimum power requirement (kW/hp) at 1000 min-1 | 59/80 | 73/100 | 59/80 | 66/90 | 73/100 | 81/110 | ||
| Required tractor hydraulic equipment | 1 DA | 1 DA | ||||||
| Gearbox | DUPLEX with gear selection by interchangeable gears | DUPLEX with gear selection by interchangeable gears | DUPLEX with gear selection by interchangeable gears | DUPLEX with gear selection by interchangeable gears | DUPLEX with gear selection by interchangeable gears | DUPLEX with gear selection by interchangeable gears | Central DUPLEX with gear selection by interchangeable gears and 2 side gearboxes | Central gearbox with oil cooler Side DUPLEX gearboxes for PTO at 1000 min after gear inversion 306 min-234 min (factory setting) - Original gears 21/24 teeth |
| Rear PTO output | As standard | As standard | As standard | As standard | As standard | As standard | As standard | As standard |
| Rear PTO (same rotation as tractor) | As standard | As standard | ||||||
| PTO safety | Cam-type cut-out clutch | Cam-type cut-out clutch | Cam-type cut-out clutch | Cam-type cut-out clutch | Cam-type cut-out clutch | Cam-type cut-out clutch | Cam-type cut-out clutch | Cam type cut-out clutch on each DUPLEX gearbox |
| PTO speed (min-1) | 540/750/1000 (factory set) | 540/750/1000 (factory set) | 1000 | 1000 | 1000 | 1000 | 750/1000 | |
| Rotor speed 1000 min-1 | 270 (factory set)/360 | 270 (factory set)/360 | 230/313 | 230/313 | 230/313 | 230/313 | ||
| Type of blades | FAST-FIT with boron steel blades | FAST-FIT with boron steel blades | FAST-FIT with boron steel blades | FAST-FIT with boron steel blades | FAST-FIT with boron steel blades | FAST-FIT with boron steel blades | FAST-FIT | |
| Number of rotors | 10 | 14 | 10 | 12 | 14 | 16 | 16 | 20 |
| Side deflectors | As standard - with spring safety | As standard - with spring safety | ||||||
| Hitch | Cat. 2 and 3N (pivoting lower links cat. 2 as standard - cat 3N to order from KUHN parts) | Cat. 2 and 3 with pivoting lower links | Cat. 2 and 3N (pivoting lower links cat. 2 as standard - cat 3N to order from KUHN parts) | Cat. 2 and 3 | Cat. 2 and 3 | Cat. 2 and 3 | Cat. 2 and 3 | Cat 3. with pivoting lower links |
| Working position | Rigid or floating | Rigid or floating | ||||||
| Transport locking position | Hydrualic | |||||||
| Approx. weight. (kg) with Crumbler roller with removable tubes Ø 390 mm | 1090 | 1185 | ||||||
| Approx. weight (kg) with Maxicrumbler roller Ø 520 mm | 1100 | 1470 | 1195 | 1400 | 1580 | 1790 | 2350 | 2900 |
| Approx. weight (kg) with Packer PK2 roller Ø 515 mm | 2625 | 3290 | ||||||
| Approx. weight (kg) with Packer PK2 / Packer PK2 HD roller Ø 515 mm | 1295 | 1740 | 1390 | 1635 | 1850 | |||
| Approx. weight (kg) with Maxipacker roller Ø 535 mm | 1325 | 1790 | 1420 | 1695 | 1900 | 2700 | 3350 | |
| Approx. weight (kg) with Steelliner roller 12.5 cm row spacing Ø 500 mm | 3350 | |||||||
| Approx. weight (kg) with Steelliner roller 12.5 cm row spacing Ø 550 mm | 1550 | 1940 | 2095 | |||||
| Approx. weight (kg) with Steelliner roller 15 cm row spacing Ø 550 mm | 1480 | 1950 | 2860 | |||||
| Rear levelling share | As standard |
