NTN has developed an excellent track surface static strength ball bearings

  NTN Ball Bearings NTN differential gear (NTN) Company May 17, 2013 announced the development of a differential gear for automotive and transmission, improve the performance of deep groove ball bearing pressure marks. The implementation of the new products through the slewing ring modification treatment, to improve the static strength of the bearing raceway surface, can replace the original differential gear such as the use of tapered roller bearings