bearings with Z and ZZ are greased using a high quality grease, lubricated for life and suitable for high speeds Bearings with the suffix 6319 2RS 180319 95 200 45 153000 118000 2200 5710 6320 320 100 215 47 174000 140000 3200 3700 7633 6320 ZZ 80320 100 215 47 174000 140000 3200