ANTI-FRICTION BEARING

摘要

A rolling bearing includes an outer bearing race (1) and an inner bearing race (2) defining a bearing space between the outer bearing race (1) and the inner bearing race (2). Rolling elements (3) are mounted in the bearing space. A seal device (S) is provided at one axial opening of the bearing space and includes a ring member (20) formed of a metal and formed with through holes (23) configured such that lubricating oil can pass through the through holes (23) and solid foreign substances cannot pass through the through holes (23). One of the outer bearing race (1) and the inner bearing race (2) is stationary, and the other is rotatable. The ring member (20) is in engagement with the stationary bearing race. A sub-ring member (30) which is a separate member from the ring member (20) and made of a metal is fixed to the rotatable bearing race. Between the ring member (20) and the sub-ring member (30), a gap is defined which constitutes a labyrinth seal structure.