| 摘要 |
A mandrel for a machine tool comprising a body having a plurality of locking jaws radially floatably mounted therein. The mandrel includes a mechanism for compensating for eccentricity of a workpiece retained by the mandrel, which mechanism includes a floating ring mounted on a sleeve, both of which are adapted to slide longitudinally relative to the body. The ring is provided with a plurality of inclined ramps, each of which cooperate with a respective lever to operate the locking jaws during longitudinal movement of the ring. The mandrel also includes a balancing device to compensate for the eccentric weight of the ring when same is eccentrically positioned relative to the mandrel axis.
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