One-piece collet and process for making same

Details One-piece collet and process for making same One-piece collet and process for making same

B - Operations, Transporting

23

B

29/27

B23B 31/20 (2006.01)

Patent

CA 1041752

EARL C. ANDREWS ONE-PIECE COLLET AND PROCESS FOR MAKING SAME ABSTRACT OF THE DISCLOSURE A one-piece collet for use in machine tools, which collet comprises a rear portion which is cold worked to provide a bore of smaller diameter than the bore of the central portion of the collet, which reduced bore is threaded. The cold working of the rear portion produces a transitional area between the different sized bores of the rear and central portions which is character- ized by a smooth, uniform grain flow, with unbroken flow lines, resulting in increased tensile strength and longer fatigue life of the collet. The front portion of the collet may also be cold worked to provide a similar transitional area between the central portion of the collet and the reduced bore of the front portion of the collet.

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