Extremely high-density bales, low power requirement

One plunger stroke - double impact

The KUHN SB 1290 iD features the patented TwinPact double plunger system, an intelligent way to reach high bale densities while reducing high peak loads on the machine. To achieve up to 25% higher bale density, the plunger requires twice the force of a conventional large square baler. The TwinPact plunger is divided into an upper and lower part, which are connected with a triangle rod. The plunger impact on the bale is divided into two steps, increasing the applied force per surface area and thus bale compaction. Despite the heavier bales, the load on the machine is comparable with a conventional 3x4 baler, eliminating the need for an oversized driveline, flywheel and main frame.

The TwinPact effect:

//  Ensures intelligent, efficient bale compaction while avoiding high peak loads on the machine.
//  This intelligent design gives you the possibility to work with similar tractor sizes as a conventional 3x4 baler.
//  Produces bales that are 25% heavier in dry crop conditions.

A perfect balance between capacity and density

The KUHN patented torque regulation system on all 4' wide SB models ensures a perfect balance between capacity and density. The system consists of plunger rod load pins that measure the plunger force and an angle sensor that measures the crank angle. Throughout the complete plunger cycle the exact torque is calculated. The benefit of this sophisticated measuring method is that up to 5% higher bale density can be achieved when driving at a capacity of 25 t/h. This density increase results in reduced bale transport and handling costs.

POWER DENSITY: the KUHN Solution

The bale chamber

The specially designed bale chamber of the KUHN SB 1290 iD is the result of more than 35 years of experience in big square baling. An active pre-chamber filling mechanism with a newly designed mechanical feeder fork system, ensures the production of evenly filled bales.
A 12' 3" long bale channel combined with the pressure control system ensures optimal control of the bale density. Highly resistant, replaceable wear plates for baling in abrasive, dry crop conditions are integrated into the machine design. A funnel shaped pressure door and a 7-beam top door design guarantee perfectly shaped bales and extra resistance.

The double knotting system

The SB 1290 iD is equipped with a double knotting system. Via electronic knotter monitoring, the driver has accurate information concerning twine tension at all times and receives an alarm if an issue arises. The knotting progress can be monitored directly from the tractor cab.

While baling, an upper (blue) and lower (red) twine is fed to the bale. Because the twine is not pulled all the way around the bale, there is no tension on the twine during the bale formation.
Step 1: As the bale reaches the desired length, the needles (grey) are activated and move upwards towards the knotter to start the knotting cycle. In this first step the bale is finished with the first knot.
Step 2: Once the first knot has finished the bale, the second knot connects the upper and lower twine again so the next bale can be formed without stress on the twine during knotting.

All SB models are equipped with 2 hydraulically driven turbo fans. The aggressive fans guarantee a clean knotter area for optimal knotter performance.

Optimal crop pickup

The pickup is designed to match the full capacity of the machine. With an intake width of 90", the baler is capable of working in all swaths. The reliable cam-track system will not let you down, even in the harshest conditions. To adapt the machine to your fields, you have the choice between fixed and pivoting pick-up wheels. The pivoting pick-up wheels are semi-pneumatic and therefore ideal for rough terrain and rocky fields.

To better meet your operation's specific needs, there are two intake options available for the SB 1290. Select from one of our patented Integral Rotors. The OptiFeed non-cutting rotor or the 23-knife OptiCut cutting rotor.

POWER FEED ROLLER

Whether you are baling dry straw, hay or wet silage, the Power Feed Roller allows you to take capacity to the next level. This driven crop roller actively follows the height of the swath. As a result, the crop is slightly compressed and evenly distributed when entering the intake rotor. Inconsistencies in the crop flow are smoothed out, delivering a steady crop flow towards the rotor.

Peak loads as a result of irregularities in the swath are avoided. The smooth and steady crop intake ensures a reduced power requirement and a smooth running machine. Moreover, wear on the machine is reduced as less strain is applied on the intake.

Your benefits are:

1- Unrivalled overall capacity

2- Excellent crop guiding in different crops and swath sizes

3- Less power peaks in the intake system

4- Smooth running of the machine

INTEGRAL ROTOR Technology

Available across the entire KUHN square baler range, our Integral Rotor technology can be found on OptiFeed and OptiCut models. This simple, maintenance-free intake system guarantees an enormous throughput capacity at all times. The short distance between rotor and pick-up tines maintains consistent crop flow. The design of this force-fed intake makes higher forward speeds possible for increased productivity and reduced crop damage.
The Integral Rotor has rotor tines made out of Hardox® wear plates to offer excellent durability in abrasive crop conditions.

Non-cutting: OptiFeed rotor

The 19" diameter OptiFeed rotor design, where rotor tines - made out of Hardox wear plate - and auger flighting are combined on one shaft, helps even out the swath by spreading the crop evenly for consistent bales every time. When crop cutting is not required, the OptiFeed system ensures a controlled and consistent crop flow to the pre-chamber. With the rotor, an additional level of protection is given to the machine.

The 23.5" diameter Biomass OptiFeed rotor design combines all the benefits of the standard OptiFeed rotor with bolt on rotor tines made out of Hardox wear plate for excellent durability and easy exchange. These rotor tines are specially designed for aggressive, high volume biomass crops.

Cutting: OptiCut 23 knifes (OC 23)

The OptiCut 23-knife rotor (OC 23) offers a cutting length of 1.75"on the 4' wide bale channel models. With a rotor diameter of 23.5", the rotor will process every swath that is placed in front of the baler. The knives on the OC 23 have individual hydraulic protection. This ensures a perfect cutting quality regardless of working speed and crop. The operation of the knife group configuration is easily done from the tractor cab via the terminal. The operator can choose from the following knife group configurations: 0 - 11 - 12 - 23. The bolt on rotor tines made out of Hardox wear plate guarantee easy exchange. Together with the standard cassette system for easy knife changing, you not only invest in cutting quality but, above all, in driver comfort.

Reliable, durable and easy to operate

Heavy-duty driveline

Perform at maximum capacity with a durable intake system. Synchronized drive of components is made by gearboxes and shafts. This ensures a perfectly synchronized machine with easy maintenance. The heavy-duty driveline features self-resetting cam-clutches. The benefit of these clutches is that they offer the possibility to use the machine at maximum capacity without worrying about time consuming shear bolt replacements. The driveline layout is simple, clean, and easy to service and maintain while minimizing the overall number of moving parts.

Instant protection

To use the machine at maximum capacity, a reliable drive protection system is required. All main intake components of the KUHN large square balers are fitted with a cam-type clutch. With this non-stop safety system you can unblock the machine from the operator seat, in the event of an overload. The pickup, Integral Rotor, main drive and feeder fork are protected with cam-type torque limiters, which are automatically activated in the event of an overload. The respective cam clutch then activates and the intake is stopped. The clutch re-engages when the operator reduces the PTO speed. Another benefit of these clutches is that they offer the possibility to use the machine at maximum capacity without worrying about time consuming shear bolt replacements.

Smart design for more user convenience

The design offers easy accessibility to the inside of the machine during daily inspection and maintenance. For more safety, the knotter deck is equipped with solid stairs and a safety railing. The safety railing can be folded down easily to reduce the height of the machine during transport. Moreover, the driver can benefit from optimal comfort thanks to the heavy flywheel, the load sensing hydraulics and the torque regulation system.

The load sensing hydraulic system is used for automatic axle locking, raising and lowering knives (OptiCut models), roller chute and bale ejector functionalities. The hydraulic system can easily be switched mechanically to an open center operation if using it in combination with a tractor without a load sensing hydraulic system.

Optimal driver comfort

For maximum driver convenience the SB 1290 iD is equipped with a 1069 pound, heavy-duty flywheel guarantying a smooth running machine. The design offers the operator maximum driving comfort during the daily operation.