FIELD: mechanical devices working in unfavorable surrounding medium. SUBSTANCE: solid lubricant bearing unit includes rollers and outer and inner races with chutes for rollers. Chute of one of races is provided with circular groove for solid lubricant which is made in form of split ring mounted in circular groove in stressed state. Solid lubricant may include graphite. Solids of revolution may be made in form of rollers or balls. EFFECT: enhanced reliability of bearing unit. 7 cl, 4 dwg
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