The nut for bearing fixing, the conclusion structure and its conclusion manner, and the principal axis device null for the machine tool which being conclusion

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