| 摘要 |
PROBLEM TO BE SOLVED: To provide a spindle device for a machine tool which suppresses the vibration of a spindle by a comparatively simple structure, suppresses the displacement of the spindle with respect to an impact load, enhances a resonance point as a system, and is advantageous in terms of processing accuracy and high-speed rotation.SOLUTION: Preload springs 41, 41 are arranged between axial opposing faces of an outer ring 31 of a rear-side bearing 14 and a rear-side step part 11b of a housing 11 so as to impart constant-pressure preloads to a plurality of rolling bearings 13, 13 and 14, 14, and deformation members 44, 44 which are increased in rigidity as becoming high in deformation speeds are arranged between the axial opposing faces in parallel with the preload springs 41, 41.SELECTED DRAWING: Figure 1 |
