Mounting of collet chucks

• For collet chucks mounted on backplates, all of the same methods above are applicable.
• Many lathes that run collet chucks have dedicated collet-closer setups whereby there is no backplate, and the spindle nose contains the female taper for either the collet's male outer taper, or a sleeve that will hold it. A hollow drawbar passes back through the headstock to its back side, where a closer mechanism is mounted. The latter allows easy, rapid opening and closing of the collet.
• The drawbar's inner diameter determines the through-the-spindle bar diameter capacity of the lathe. Some collet-closer systems even allow opening and closing without stopping the spindle rotation. The closer on a manual lathe is either lever-style or handwheel-style.
• The closer on a CNC lathe is powered (electric, hydraulic, or pneumatic), and it may be controlled by various means: a foot pedal that the operator steps on when desired; a line in the program (for opening and closing under program control); or a button on the control panel.

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Collet:OZ Collet

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