... , ball bearing, roller be 1) Type: 6000, 6200, 6300, 16000, series.2) Corresponding type: 605-6015, 625-6215, 6300-6315, 16000 ... : GCr15China.(AISI)52100American,(Din)100Cr6Germany.4) Shield/closure: open bearing, Z, ZZ, RS, 2RS.5) Vibration and Noise level: Z1, Z2 ...