| 摘要 |
PROBLEM TO BE SOLVED: To heighten the joining strength between the inner ring of a pulley unit and a bracket. SOLUTION: The pulley unit is composed of a pulley 11, a rolling bearing 12 to support the pulley 11 rotatably, an inner ring 13 fitted integrally in the inside surface of the rolling bearing 12, and a bracket 14 coupled with the inner ring 13, wherein the bracket 14 and inner ring 13 are integrated.
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