Zero class bearings are deep groove ball bearings. The original name is single row radial ball bearing, is the most widely used It is one of the most widely used rolling bearings. Its characteristics are friction resistance, high speed, can be used to bear radial load or radial and axial action at the same time. They can be used to carry radial loads or combined radial and axial loads at the same time. They can be used in machines subjected to radial loads or combined radial and axial loads, as well as in machines subjected to axial loads.