The working elements of the active harrow are discs on which two cutting knives, approximately 20 cm long, are placed vertically. The operation of the gear sets the discs with knives in motion, this is done through gears located on each disc inside the aggregate, which gears are flooded with gear-hydraulic oil. The arrangement of the knives (2 knives per segment) allows for crushing large clods , heavily compacted or lumpy soil without overloading the tractor. The recommended PTO/PTO speed is 540 rpm and the maximum operating speed must be selected depending on the ground conditions on which the harrow is working at the moment. The harrow is attached to a tractor with a 3-point linkage system of the first category CAT I and CAT II .
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