摘要 |
PROBLEM TO BE SOLVED: To restrain stress concentration by centrifugal force in high speed operation, to reduce noise by a wind roar in the high speed operation, and to restrain deformation, a burr and a return due to fastening, while having a structure for locking a fastening tool on a nut. SOLUTION: At least two surfaces or more of plane parts 51a are formed on an outer peripheral surface of the bearing fixing nut 51 for fixing bearings 60 and 70. COPYRIGHT: (C)2010,JPO&INPIT
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