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Precision Deep Groove Ball Bearings ( EMQ Bearings ) 6804 2RS Bearing Designation Open Seals 6804 2RS d 20 D 32 B 7 r1 0.3 Cr 4 Cor 2.45 Grease 21000 Oil 25000 da 22 Da 30 Mass(kg) 0.018 Introduction ...