| 摘要 |
PROBLEM TO BE SOLVED: To provide an assembly type rotor, which has a simple structure to be easily processed, can uniformize fastening load of a screwing part, and can reduce a centrifugal force. SOLUTION: In this assembly type rotor, a plurality of discs are multiply jointed in an axial direction with a bolt. A fitting hole 22 closely fitting with a fitting shaft part 21 formed at the front end of a spindle bolt 5 is formed to a main part 20 of a third disc of a main spindle 2. A female screw (nut part) 25 screwed with a tapered screw part 24 formed immediately at the rear part of the fitting shaft part 21 on the front end side of the spindle bolt 5 is formed at a projection 23 at a predetermined height on the rear side of the main part 20 coaxially with the fitting hole 22.
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