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2- Lathe Collets -The Drawbar and Collet Chuck
A drawbar like the one shown is a device for actuating the collet system through the spindle of the lathe. Before mounting the collet on the lathe, it is necessary to remove the chuck and attach the collet drawbar. Since there are so many adaptations to the collet system, the drawbar may be slightly different from machine to machine. Studying the method of attachment will make the installation simple.
Some drawbars are bolted to the machine, while others are attached with a threaded wheel at the spindle. Another popular version has a kick out lever that allows for rapid tightening and loosening of the part. Most CNC collet systems use a hydraulic or pneumatic system to open and close the collet.

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