FIELD: agricultural engineering. SUBSTANCE: disk harrow has spherical disks, spacers arranged between disks, bearing units, shaft and nuts for tightening one disk with respect to another. Disk harrow shaft is composed of two parts interconnected through coupler for rotation relative to one another. Each shaft part in mounted in individual bearing unit. Such construction provides for transmission of torque loads to each part of shaft from spherical disks, which are attached thereto. Mounting of each shaft part in related bearing unit allows usage of sleeve with central opening for shaft to be avoided. EFFECT: simplified construction and maintenance, reduced damage to shaft, enhanced reliability in operation and increased service life of bearing units. 2 cl, 3 dwg
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