... (AISI) 52100---American, (Din) 100Cr6---Germany;4)Shield/closure: open bearing, Z, ZZ, RS, 2RS,5)Snap ring: N, ... , Precision Machinery, Electric Tools, Power Tools, SportsCylindrical Roller Bearings:Series: SL N NJ NU NUP NN NJ …NU200 ... supply many other kinds of bearing,such as: Linear motion bearingDeep Groove Ball BearingCombination BearingJoint bearingStainless steel bearingHigh temperature ...