Also known as thin-walled, thin-walled section bearings bearing rings, its high precision, very quiet and very strong bearing capacity. Thin-walled bearing rings can be deep groove ball bearings, four point contact bearings, angular contact ball bearings, thin-walled section bearings, etc. Most of the cross-section is a square. In these series, even the larger diameter shaft and the bearing hole, the cross section is unchanged. These bearings so called constant section. It is this characteristic of the standard series ISO thin wall bearing and conventional bearing rings to distinguish. Thus, the larger cross section can be selected and used more carrying capacity without changing the bearing shaft diameter. Thin-walled bearing rings can be designed to require very little space is extremely light and bearings. Complete specifications, quantities.