Collet-type drill

Details Collet-type drill Collet-type drill

1981-08-20

1983-08-02

Garrett, Robert E.

Cutting by use of rotating axially moving tool

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

Having tool-opposing, work-engaging surface

173 32, 269 24, 269 32, 269 47, 269153, 408 79, B23B 4514

Patent

active

043963188

ABSTRACT:
The collet-type drill includes improved clamping means having a pressure foot member that is in engagement with the work piece. The pressure foot member is connected with a drill motor and with a feed means. A collet is operably connected to and movable relative to the foot member, and when actuated, connects the drill to the work piece. A clamp bushing has one end pivotally connected with the collet and encircles a cylindrical sleeve that has a transverse slot extending therethrough. The bushing is connected to the pressure foot member. A clamping piston extends through the sleeve and carries a connecting pin that extends through the slot in the sleeve into the clamp bushing whereby the bushing and collet are movable together in response to movement of the clamping piston to force the collet into holding engagement with the work piece.

REFERENCES:
patent: 2909949 (1959-10-01), Winslow
patent: 2911860 (1959-11-01), Winslow et al.
patent: 3599958 (1971-08-01), Schindler
patent: 3663115 (1972-05-01), Vindez et al.

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