'ej 'eS, retainer hardness compared QujmeH moQ bearing Qeb je qabDaq Hap 'u' baS (QaQDaq: yoDSutlIj naQ, qaStaHvIS medium carbon, aluminum alloy) pagh QI'yaH-metallic (QaQDaq: ptef, polymer Hap 'u' Sut HabmoHwI', dragon.). bearing bIr mIw wIje'laHbe'chugh vaj (tetlh bearing) puS QonoS (QonoS bearing) SIQ Frictional resistancesmall, tetlh vaj speed rap, Hat ghaH ghuS because of friction.