... must be counteracted. So the bearings are normally adjust against a second bearing. 2) Single row angular contact ball bearings can ... BALL BEARING dimension seriesdCagesingle row -(B-type) - standard728, 719...B, 72...B,73... B,74...B15..280 mmM,MA,MBfour pointsQJ2 ... .5...190 mmM,MA,MBsingle row - highprecision (A,C type)70..A, 70..C, 72..A, 72..C15..150 mmTA,TB,MA,MBdouble row -standard32 ...