SPINDLE UNIT FOR CNC LATHE AND MATAL PACKING MANUFACTURING METHOD FOR VALVE WHICH USES THIS

摘要

PURPOSE: A spindle unit for CNC lathes and a method to process a metal packing for valves using the same are provided to improve the productivity as the integral processing is performed on the CNC lathe and to efficiently use a work space because a separate marking device or a rear surface processor is not required. CONSTITUTION: A spindle unit (1) for CNC lathes comprises a cap nut (3) and a collet (4). A claw (5) divided by a cutting groove (5a) is formed in the front end of the collet. A taper operating hole connected to an operational pin inserting hole is penetrated inside the claw. An operational pin where a taper operating unit is inserted into the taper operating hole is formed is inserted into the front end of the operational pin inserting hole. A compressed spring (11) is interposed between a sleeve (9) and a collar assembled in the cap nut. The sleeve can be pressurized by a pressurizing member in which is installed in a tailstock.