| 摘要 |
<p>A hub unit (1) includes a rolling bearing (2) and a flange (4)integrally formed with a hub wheel that may function as a bearing ring member (3) of the rolling bearing (2). The flange (4) has a plurality of thick portions (21) formed at predetermined intervals in the circumferential direction of the flange (4). Each thick portion (21) has a bolt hole (22) that extends through the corresponding thick portion (21) in the thickness direction of the thick portion. Work holes (23) through which a working tool is able to be inserted and which extend through the flange (4) in the thickness direction of the flange are formed between the bolt holes (22)adjacent to each other in the circumferential direction. A circumferential width (W) of each thick portion (21 that has the bolt hole (22) and that is adjacent to the work holes (23) in the circumferential direction is set to such a width dimension (W) that the thick portion (21) does not interfere with the adjacent work holes (23).</p> |
