... friction coefficient we can produce high precision thin section ball bearings, KAA15XLO,KA025CPO,KD140XPO,KD180XPO,KD180ARO etc The major ... characterizations of the PRS thin-section ball bearing are that, light weight, sufficient rigidity, small section, and the ... circumstances, such as requiring small space, heavy load ,light weight or limiting some special forms .At the same time , ...