... OPEN,Z,ZZ,RS,2RS,N,NR bearings 2. wide varieties 3. less coefficient of friction 4.high limiting speed SERIESBORE DIAMETER(MM ... ,RS,2RSinner packing:plastic bag,tube in cartonless coefficient of friction, high limiting speed,large size range and colorful combination of ... machinery, as a widely used type of bearings in machinery industryDeep groove ball bearings mainly take radial load as well as take ...