Miniature ball bearing

Among the micro bearings with ultra-small bore diameter, the types of Miniature ball bearing are 68 series, 69 series and 60 series in metric system, and there are 6 kinds of British R series. On this basis, they can also be divided into bearing series with ZZ steel dust cover, miniature bearing series with RS rubber seal ring, Teflon bearing seal ring series and flange flange series, etc.

Miniature bearing refers to metric series, outer diameter less than 9mm; British series, outer diameter less than 9.525mm! The main materials are carbon steel, bearing steel, stainless steel, plastic, ceramics, etc. the minimum inner diameter can be 0.6 mm, and the general inner diameter is 1 mm.