| 摘要 |
In a spindle assembly for machine tools, the axial length lambda of the collar of a spring collet is determined as a function of the axial course length c of a clamping sleeve operating spring collet. This axial length lambda is preferably retained within an interval ranging between 3 mm and 9 mm. A tapering surface of the collar presents an inclined profile, which is straight, curved, or at least partially curved. The angle of inclination formed by the tapering surface with the axis of the spring collet is advantageously of the order of 45°. The spring collet has grooves, the number whereof is at least two, but also greater than three. The gap between these grooves may be determined in such a way that, when the spring collet is in the closed position, then the workpiece is gripped with a predetermined clamping force, and the two mutually opposing faces of each groove portion abut against each other.
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