| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To detect the rotational speed with high reliability at a low cost by realizing the consistent density of the magnetic flux from an encoder 10b formed of a permanent magnet and reaching a detection unit of a sensor. <P>SOLUTION: The residual magnetic flux density of inner rings 1 and 1, an outer ring 14, and balls 5 and 5 which are respectively formed of magnetic materials is set to be≤0.2 mT, individually, and≤2 mT in an assembled state as a rolling bearing unit. The magnetic flux from the encoder 10b is hardly affected by the residual magnetic flux of the rolling bearing unit. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
