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通过在三爪卡盘中安装爪脚时跳过一个或更多齿,圆形坯件可以偏移到几乎任何所需的数值,以进行车削和镗削偏心零件。如果卡盘涡旋线的螺距不能达到工件所需偏移量的话,那么可以在某个爪脚下加一块小小的垫片
By skipping one or more teeth when mounting the pawl in a three-jaw chuck, the circular blank can be offset to almost any desired value for turning and boring off-center parts. If the pitch of the vortex plate of the chuck can not reach the desired offset of the workpiece, then a small spacer