... , QT) even Wulian (PBC, PFC, PT, PBT, PFT), such as group distribution. Of duplex angular contact ball bearings, and its sub-group ... different pre-load. Group face-to-face with the angular contact ball bearings bear smaller overturning moment, the system provides a ... bearing lower coaxiality error sensitive. Group series with the angular contact ball bearing in one direction only allowed to bear a ...