Thin-section crossed roller bearing ,because of its vertical arrangement of tapered roller with a 90°V in the deep groove roller surface ,compared to other kinds of bearings ,has increased rigidity to a large extent .The RTR thin section crossed roller bearing has two kinds of structures, one is dividing in the inner ring, the other is dividing in the outer ring .Even if we exert additional pre-pressure on it, it still can carry out rotating movements at highest precision. Their installment are comparatively simple, too.