GRINDING DISK Russian patent published in 1997 - IPC

FIELD: mechanical engineering. SUBSTANCE: grinding disk is provided with axial passageways the cross-sections of which are equilateral trapeziums filled with solid lubricant during manufacturing the disk. The centers of the passageways are arranged at the concentric circumferences the distance between which is less than the height of the passageway (trapezium). Each circle contains the same number of the passageways and the centers of the passageways at each previous circle are shifted with respect to the centers of the passageways on the subsequent one, angular step of the passageways as well as the shift are defined by relationships presented in the invention description. EFFECT: increased durability. 3 dwg