FIELD: machine building.
SUBSTANCE: single-row rolling bearing for rotary drill contains movable and immovable rings and located between then rolling elements, implemented from dissimilar materials. On immovable ring annular paths are implemented for each rolling element in cut. In the center of each cut it is simplemented opening for lubrication. On race groove of movable ring and to annular paths of immovable ring it is applied diamondlike coating. Rolling elements are manufactured from ceramics on the basis of silicium nitride.
EFFECT: increasing of durability.
5 dwg
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