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US Patent: 3,618,962
Collet Chuck
John R. Cox - Lakewood, OH
Joseph E. Mix - Cleveland, OH

USPTO Classifications:
279/76, 279/82, 279/97, 409/232

Tool Categories:
metalworking machines : metal lathes : lathe tools

Warner & Swasey Co. - Cleveland, OH

Not known to have been produced


Patent Dates:
Applied: Feb. 17, 1970
Granted: Nov. 09, 1971

Patent Pictures:
USPTO pdf tiff
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"Vintage Machinery" entry for Warner & Swasey Co.


A collet chuck having a radially movable pin therein for locking a tool such as an end mill against axial withdrawal from and turning in the collet. The pin is tapered and fits within a correspondingly tapered, radially extending hole in the collet which limits its inward movement. The pin is biased into full seating engagement with the tapered hole by a retaining spring and is adapted to be cammed radially outwardly during insertion of an end mill by a beveled end on the tool shank or by the flute contour in the case of a double ended end mill. With the collet in the chuck the inner end of the pin radially overlaps a shouldered recess on the shank of the tool and the outer end contacts the inner wall of the chuck. The pin thereby prevents axial withdrawal or turning of the tool.

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