... motor, motorcycle, pump,tools and so on Deep Groove Ball Bearings, withi high quality and competitive price,maily ... Used: GCr15 ---China, (AISI) 52100---American, (Din) 100Cr6---Germany;4)Shield/closure: open bearing, Z, ZZ, RS, 2RS,5) ... , and design.Its scope of business covers bearing, bearing processing equipment, and testing instrument as well ... recognized by the clients. Deep Groove Ball Bearing