The GrindStar®

New equipment system for better field hygiene

Saphir Maschinenbau GmbH, seed2Soil GmbH & Co. KG and the Institute for Construction and Agricultural Machinery Technology at the Cologne University of Applied Sciences are currently working on a joint project to develop an innovative tillage equipment system for energy-saving straw conditioning and ultra-shallow tillage (GrindStar®).

The project is being funded by Landwirtschaftliche Rentenbank - Germany’s development agency for agribusiness and rural areas - for a period of three years.

The increasing demands in arable farming - for example due to chemical crop spraying restrictions - plus the various political and social requirements call for new cultivation and technical solutions. Targeted tillage can contribute to improved field hygiene. To reduce the negative effects associated with intensive tillage, the project participants are developing an equipment system for ultra-shallow postharvest management.

The new GrindStar® tillage implement consists of two rows of passively driven rotors. The front rotors rotate in the opposite direction to the rear rotors. This arrangement and the symmetrical design of the rotors result in a full-surface working pattern. The rotors are driven solely by the forward speed. The tools cultivate the soil and crop residues to a working depth of 0 to 2 cm over the entire surface, which prepares the area for active surface rotting.

The parallelogram-guided suspension of the tools ensures uniformly shallow processing. The spring-loaded blade tools and the specially developed pressure relief system in the rotor ensure good horizontal and vertical tool guidance. Only then will significantly improved ground adaptation be possible than with previous designs. The main developments in the design were carried out by engineering firm seed2soil GmbH & Co. KG and Saphir Maschinenbau GmbH.

Saphir adapted the design for later series production and used it for an initial pre-series. The team from the Institute for Construction and Agricultural Machinery Technology at the Cologne University of Applied Sciences is supporting the project partners in the design and optimisation of the tools (including their attachment) with student projects and theses.

The team is also carrying out extensive field tests throughout the entire project using the newly developed equipment and other popular models. The findings from use in the field are fed directly back into the ongoing development process.

Regular meetings facilitate the continuous exchange of information between everyone involved, and ensure that the equipment is optimised at a fast pace.

The novelty of this equipment was examined intensively by the patent office and recognised by a corresponding patent grant. Many existing systems combine several different tools, making them comparatively large and heavy and resulting in higher tractor power requirements.

On the other hand, the GrindStar® consists of newly developed, multifunction tools that can cut and shred at the same time.

As a result, the equipment not only works faster (12 - 18 km/h), but fuel consumption per hectare is also significantly reduced thanks to the low tractive power requirement of approx. 20 hp per metre of working width.

Technical data GrindStar GRS 600
Working width approx. 6,00 m
Transport width approx. 2,90 m
Frame design hydr. foldable
Working speed 12-18 km/h
Number of rotors 16
Number of blades 112 (7 blades per rotor)
Working depth 0-2 cm
Power requirement approx. (kw/hp) 88/120 - diesel consumption 2-3 L/ha
Cultivation category Cat. III
Weight approx. 1,820 kg (with spreader attachment 1,900 kg)
  • Grain
  • Rapeseed
  • Maize
  • Catch crops
  • “Blind grinding”
  • Insensitive to stone
  • Legumes
  • Seedbed preparation
  • Crushing of large clods and lumps

The tools are installed on two rows of passively driven rotors. The front rotors rotate in the opposite direction to the rear rotors. This arrangement and the symmetrical design of the rotors result in a full-surface working pattern.

The rotors are driven solely by the forward speed. As a result, the equipment not only works faster (12 - 18 km/h), but fuel consumption per hectare is also significantly reduced thanks to the low tractive power requirement of approx. 20 hp per metre of working width.

The parallelogram-guided suspension of the tools ensures uniformly shallow processing. The spring-loaded blade tools and the specially developed pressure relief system in the rotor ensure good horizontal and vertical tool guidance. Only then will significantly improved ground adaptation be possible than with previous designs.

Saphir Maschinenbau GmbH

Wichernstraße 1
27404 Bockel
Germany

Phone: +49 (0) 4281 / 712 - 799
Fax: +49 (0) 4281 / 712 - 46

grindstar(at)saphir.de