AG brand belongs to Germany (SCHEAFFLER), schaeffler group, the group is the global production of rolling bearing and linear motion products leading enterprises, is also one of the highly reputation suppliers in car manufacturing. Group has about 65000 employees worldwide, it cannot be removed. These bearings can be open and sealed. Tolerance of main shaft bearing co., LTD. They are particularly suitable for the need to be very high guidance accuracy and speed ability of bearing arrangement. They are particularly suitable for machine tool axis bearing arrangement.