| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a spindle device bearing having a favorable oil draining property for suppressing the excessive supply of lubricating oil to the bearing and the abnormal heating of the bearing. <P>SOLUTION: In an outer ring 71 of the spindle device bearing 70, an oil supply hole 78 and oil drain holes 71a, 71b are formed passing therethrough in the radial direction. The suction force of a negative pressure generating device 103 generates negative pressure in the oil drain holes 71a, 71b. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
