Two-piece concentric collet

Details Two-piece concentric collet Two-piece concentric collet

1995-08-31

1997-05-13

Howell, Daniel W.

Cutting by use of rotating axially moving tool

With work-engaging structure other than tool or tool-support

Having tool-opposing, work-engaging surface

408110, B23B 4514

Patent

active

056285922

ABSTRACT:
A drilling mechanism for drilling one or more holes in a workpiece includes a collet for securing the drilling mechanism to a hole formed in a fixture mounted in front of the workpiece. The collet is slidable rearwardly along a tapered nosepiece to be elastically expanded outwardly into tight frictional contact with the fixture hole. The collet comprises a clamping part and a separate displacement part connected thereto. A contact interface is formed by the clamping and displacement parts for transmitting rearward forces from the displacement part to the clamping part. The contact interface extends for 360 degrees about the center axis of the collet. Longitudinal play is provided between the displacement and clamping parts so that when the collet is to be moved forwardly and released from the fixture, the displacement part is initially moved longitudinally relative to the clamping part to apply a radially inward force to the clamping part for disengaging the clamping part from the fixture hole.

REFERENCES:
patent: 3599958 (1971-08-01), Schindler
patent: 3861692 (1975-01-01), Patzer
patent: 5395187 (1995-03-01), Slesinski et al.
patent: 5482411 (1996-01-01), McGlasson

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