UAB Laumetris produces trailed heavy disc harrows, having working widths of 3, 4, 5 and 6m. The quality of crops depends to a large extent on the tilling of the upper layer of soil, which contains lots of plant remains. Such remains are best mixed with the soil and inserted into it using heavy disc harrows with crumbler rollers. The crumbler rollers can be of bar-type, ring-type or conical disc-type.
Such heavy disc harrows are used for the tilling and loosening of the surface of soil, cutting and destruction of the turf of unbroken soil, perennial grass, clover and meadows, stubble scraping, destruction of weeds, insertion of plant remains, organic and mineral fertilizers.
The harrows can be used for ploughed or deeply-cultivated soils of various mechanical composition with a slope up to 10%, the height of stubble and plants must not exceed 25cm.
The harrows can work in soils, having various degrees of weed density, with or without stones – on the surface and within the working depth, there can be small stones (up to 10cm) and separate medium-sized stones (10-50cm), rising no more than 10cm above the surface of the soil.
The optimum angle of the direction of the sections (disc gangs) allows to insert plant remains and mix the upper soil surface, while the crumbler rollers at the rear break up remaining earth lumps on the soil surface, multiplex and level it. The X position of the four disc gangs gives the possibility to obtain a good symmetry and a correct alignment behind the tractor.
The toothed discs in the harrows, produced by UAB Laumetris, are wear-resistant. The diameter of the discs is 660mm, their thickness – 7-8mm. Each disc in the gang fitted with soil scraper which function is to keep the surface of the disc clean. Their position with respect to the disc is easy to adjust.
The depth of tilling is up to 150mm. It is regulated by adjustment screws, which allow to set the position of the lifting wheels. The cylinder on drawbar, which is on line with the general lifting system of the machine allows an exact and constant control of the penetration of the toothed disc gangs. The position of the lifting wheels behind the rear disc gangs gives to the machine a perfect stability during transport.