| 摘要 |
The invention relates to the chuck unit of an operating head for automatic machine tools in which the operating head is the type comprising a fork, fitted to the end of a mobile arm and equipped with a number of degrees of freedom, to which the chuck unit is hinged; the chuck unit comprises a chuck and equipment designed to rotate the chuck so that it slides axially. The unit in accordance with the invention is designed for use with a brushless motor and automatic equipment which varies the velocity ratio between the said motor and the chuck.
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