Chuck assembly and collet

Details Chuck assembly and collet Chuck assembly and collet

B - Operations, Transporting

23

C

29/27

B23C 5/26 (2006.01) B23B 31/107 (2006.01) B23B 31/20 (2006.01)

Patent

CA 1124050

480-78-0010 CHUCK ASSEMBLY AND COLLET Abstract of the Disclosure A chuck assembly and collet for retaining an end mill tool against axial pullout. The collet includes a radially compressible body having a tapered outer surface, a central bore and a radial aperture extending from the outer surface into the central bore. The radial aperture, which includes larger and smaller diameter portions, has a movable pin mounted therein and adapted to extend into the bore to retain the tool. The pin has an undercut portion, with a spring or snap ring mounted around the pin in the undercut portion, said spring having a free diameter slightly larger than the larger diameter to provide a pressure fit when mounted therein. The undercut has a length which is larger than the thickness of the snap ring to allow a limited radial movement of the pin to lock and to release the tool, whereby the pin is urged inwardly into the bore and engages a rear bevel end on a flat surface on the tool to secure the tool within the collet as the collet is tightened within the chuck assembly and whereby the pin can move outwardly to release the tool when the collet is removed from the chuck assembly.

343010

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