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The Viviani 9+9 disc harrow , produced by the Mipe Viviani , is an essential tool for agriculture, known for its robustness and ability to work on even difficult terrain. This model, designed for minimal soil tillage , offers excellent performance in terms of crushing and refining clods, making it ideal for soil preparation in preparation for sowing.
The 9+9 disc harrow is built with a sturdy steel structure, equipped with discs mounted on symmetrical axles , inclined to optimize penetration into the soil. The discs, usually made of hardened steel, are positioned in two rows of 9 discs each . The arrangement of the discs in an "offset" configuration allows for effective processing, both for mixing and crushing the soil.
The heart of this machine is made up of its two sections of discs , angled to each other, to ensure uniform processing. The measurements vary according to the specific model, but generally the working width of this type of harrow can fluctuate between 1.20 and 6.10 metres, while the weight can vary between 500 kg and up to 7 tonnes, depending on the configuration and accessories.
Viviani 9+9 disc harrow stands out for its efficiency in cutting and breaking up the soil. The discs can operate at high feed speeds, reducing the time it takes to complete the job. Furthermore, the arrangement of the "offset" discs allows for reduced resistance to movement, increasing energy efficiency, especially if towed by medium or large tractors.
The Viviani disc harrow is usually connected to the rear lift of a tractor via a three-point hitch. Its use consists of passing over agricultural land, where the inclined discs penetrate the soil, breaking the clods and mixing the surface material. The work can be performed at different depths, adjusting the angle and the pressure exerted by the discs.
Among the accessories that can be added there are systems to adjust the inclination of the discs, as well as any rear rollers to further refine the working of the soil.
To determine the optimal use parameters, such as forward speed and working depth , you can refer to formulas that consider the weight of the machinery (P) , the soil resistance (R) , and the operating speed (V) . An example formula could be: F=P⋅R⋅VF = P \cdot R \cdot V where F represents the force required for efficient machining.
This type of harrow is particularly effective on soils with high clods and stubble. It is also ideal for working on sown land and for preparing agricultural land that requires minimal intervention.
Regular maintenance of the Viviani 9+9 harrow includes checking and replacing worn discs, checking the disc holding axles and moving parts. Adequately lubricating the joints is essential to guarantee a long life of the machinery. In terms of safety , if it is not explicitly CE certified, it may be necessary to update some components to comply with current regulations, such as installing protection systems to avoid injuries during use.
A good used disc harrow must have discs in good condition and not deformed, axles not damaged and a structure without signs of rust or cracks . Furthermore, it is important to check that all adjustment mechanisms work properly and that there are no oil leaks from the hydraulic parts.
The Viviani 9+9 harrow is used in many agricultural sectors, especially in the cultivation of cereals and fodder plants . Purchasing a used machine represents a significant economic advantage since, in addition to being more accessible, it can often be completely regenerated to guarantee performance equal to that of a new machine, but at a decidedly lower price.
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