SB 1290 iD Large Square Baler

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.

Consistently shaped bales provide more than just aesthetic appeal. A dense, consistently filled bale represents quality in every form. Square bales are easy to handle and stack. In addition, they are much more stable during transport than a poorly formed bale. In silage applications, a square-edged bale indicates less air content, resulting in higher quality feed.

The KUHN Power Density system, a single feeder fork design, proves that a well-engineered active pre-chamber filling system can eliminate complexity. This pre-chamber system ensures consistently filled flakes and results in heavy, square-edged bales regardless of the swath condition. The single feeder fork combines two functions into one mechanism, eliminating unneeded components and complexity, resulting in lower maintenance costs.

How does it work?

1. The Integral Rotor actively delivers the crop to the pre-chamber.
2. The feeder fork (blue) provides an active filling of the pre-chamber.
3. The single-acting feeder fork continues to form the flake until the measuring plate (red) is pushed back with a predetermined force.
4. Once the measuring plate is pushed back, it mechanically activates the second function of the feeder fork system. The fork makes a different movement that empties the pre chamber and pushes the perfectly formed flake into 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 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.