Adjustable drill bushing

Details Adjustable drill bushing Adjustable drill bushing

1996-06-10

1998-05-05

Howell, Daniel W.

Cutting by use of rotating axially moving tool

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

408 97, B23B 4514

Patent

active

057465525

ABSTRACT:
An adjustable depth drill bushing assembly in which the concentricity of the drill bushing and the mounting bushing is maintained by providing flat cylindrical mating surfaces between the drill bushing and mounting bushing, even when threads are present in the mating area. Cooperating structure is provided between the two bushings which permits both precise axial adjustment and rigid interengagement. The drill bushing is adapted to move axially of the mounting bushing in the released configuration, and is rigidly locked in place in the engaged configuration.

REFERENCES:
patent: 2868044 (1959-01-01), Chaffee et al.
patent: 3620636 (1971-11-01), Godard
patent: 4752158 (1988-06-01), Riley
patent: 4813822 (1989-03-01), Biek

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