| 摘要 |
PROBLEM TO BE SOLVED: To maintain a good lubricating state for a long time without any intrusion of wear powder generated in a contact part between an inner ring and a rear cap into a bearing, and to facilitate manufacturing and the disassembling of a sealing member. SOLUTION: By extending an inner ring 4 more in a width direction than an outer ring 5, a sealing member 8 is slid on the outer diameter surface of an inner ring extended portion 4a. The sealing member 8 is attached to the outer ring 5 by being axially protruded. A rear cap 3 is brought into contact with the width surface of the inner ring extended portion 4a. More in the center side of the inner ring width direction than the sliding part of the sealing member 8 in the inner ring extended portion 4a, an annular step part 9 smaller in diameter than the sliding part is provided.
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