Miniature ball bearings refer to miniature radial ball bearings, especially miniature deep groove ball bearings. Typical bore size of miniature ball bearings start at 1 mm with an outside diameter a mere 3 mm, and the precision tolerances are from ABEC-1 to ABEC-9. Our factory generally uses 52100 chrome steel and 400 series stainless steel materials to manufacture such bearings, including metric and inch sizes, to meet consumer demand in various markets. Typical applications for miniature ball bearings are medical equipment, micro-motors, precision instruments, office equipment, etc. The service environment for these products requires bearings with high precision, low noise and vibration performance as important accessories. We can provide customers with standard miniature ball bearings, including metric and inch sizes, and one-stop sales services.