TUNNEL 8

Frame Engineering and Folding Mechanics

The main frame of the "TUNNEL 8" unit was designed to handle high-horsepower tractors starting from 300 hp. Unlike lightweight cultivators, this machine utilizes thick-walled alloy steel profiles that dampen vibration loads at operating speeds of up to 12 km/h. The longevity of the folding mechanism is ensured by reinforced hinge joints with hardened bushings, which minimizes play even after three seasons of intensive field use.

Ground Engaging Tools: Penetration Geometry

The geometry of the working tools is engineered for demanding soil conditions. Tillage depth is controlled by a parallelogram mechanism with individual pressure settings for each section. This design is critical for maintaining precise depth on fields with uneven terrain. The shanks are equipped with either shear bolts or spring-loaded protection (depending on the configuration), allowing the unit to safely navigate rocky patches without structural deformation.

Consolidation and Weight Distribution Systems

The rear roller performs the dual role of clod crushing and aggregate weight distribution. The TUNNEL 8 features adjustable gang angles, allowing the machine to be adapted for either high-moisture or overly dry soil. The integrated hydraulic control system allows the operator to adjust depth settings directly from the tractor cab without interrupting the workflow, saving up to 15% of headland turning time.

• The central drawbar ensures high maneuverability during transport in narrow passages.
• Powder coating protects the frame from aggressive soil chemistry and mineral fertilizers.
• The modular design facilitates the replacement of wear parts without the need for specialized complex tools.