1998•TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series COpen access
Reduction of NRRO in a Ball Bearing for HDD Spindle Motors. (2nd Report. Experimental Analysis of Ball Bearing with 12 balls).
Shoji NOGUCHI, Kyosuke ONO
Open full text 5 citations
Abstract
In this paper, we experimentally analyzed the non-repeatable run-out (NRRO) of a ball bearing to confirm the theoretical analysis proposed in the previous paper and the advantage of a ball bearing with 12 balls for NRRO. The results are summarized as follows: (1) Since NRRO calculated by actual geometrical errors of ball bearing parts was nearly equal to the measured NRRO, it was clarified that the theoretical analysis in the previous paper was valid. (2) NRRO of a ball bearing with 12 balls was very small even if geometrical errors of ball bearing parts was large. It was confirmed that 12 was suitable ball number for ball bearings used in HDD spindle motors.
Open-access reader