Deep groove ball bearings mainly support axial load as well as a certain amount of axial load. They have low friction coefficient, high limited speed, various size and type. These bearings are one of the most widely-used bearings in machinery industry, e.G. Precision instruments, low noise motors, automobiles, motorcycles, and other common machinery. Series (mm) Bore diameter Variant structure 61800 10-320 Z 2z rz 2rz 61900 10-280 Z 2z rz 2rz n zn rzn 16000 10-260 6000 10-260 Z 2z rz 2rz rs1 2rs1 n nr zn rzn 6200 10-220 Z 2z rz 2rz rs1 2rs1 n nr zn rzn 6300 10-190 Z 2z rz 2rz rs1 2rs1 n nr zn rzn 6400 10-100 N nr Miniature bearings 1-10 Z 2z rs 2rs f60000.