Abstract: In response to the rapid failure of grease lubrication under low surface speed with zero entraining velocity, a common occurrence in ball screws or cageless rolling element bearings, detailed observations were conducted ...

Abstract: Abstract. Impact loads significantly affect lubrication and operating reliability in crucial engineering applications such as gears and rolling bearings. To address the shortage of pure impact investigations on finite-length ...

Abstract: In ball bearings without a cage, adjacent balls exhibit a zero-entrainment velocity (ZEV) contact condition, which is worse than typical pure rolling or rolling–sliding contact, and the contact between adjacent balls under ...