... because they are available in a wide variety of seal, shield and snap-ring arrangements.The bearing ring grooves are circular arcs made slightly ... our informations as follows: 1) Types of Deep Groove Ball Bearing: 6000, 6200, 6300,6800, 16000, series. 2) Material used: GCr15 ... .(AISI)52100—American,(Din)100Cr6—Germany. 3) Shield/closure: open bearing, Z, ZZ, RS, 2RS. 4) Vibration and Noise level: Z1 ...