... our informations as follows: 1) Types of Deep Groove Ball Bearing: 6000, 6200, 6300,6800, 16000, series. 2) Material used: ... GCr15—China.(AISI)52100—American,(Din)100Cr6—Germany. 3) Shield/closure: open bearing, Z, ZZ, RS, 2RS. 4) Vibration and Noise level: Z1 ... 2) Minimum lubrication 3) Wear resistant 4) Running in not required 8) Easy replacementMain Types:Deep groove ball bearing (ZZ, 2RS ,Z , ...