| 摘要 |
PROBLEM TO BE SOLVED: To realize a structure capable of preventing slanting of inner ring raceways 4a, 4a provided on an outer circumference face of an inner ring 3a, in a structure carrying out taper fitting of the inner ring 3a on a shaft member to improve rigidity and positioning accuracy in regard to a radial direction. SOLUTION: Both inner ring raceways 4a, 4a are slanted in directions opposite to slanting directions of both inner ring raceways 4a, 4a following external fitting of the inner ring 3a onto the shaft member. Alternatively, by applying chamfering to an axial end inner circumference face of the inner ring, interference of a fitting part between an axial end of the inner ring and the shaft member is reduced to zero or made smaller than other portions. The problem is solved by one of the compositions. COPYRIGHT: (C)2007,JPO&INPIT
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