Cutting by use of rotating axially moving tool – With work-engaging structure other than tool or tool-support – Having tool-opposing – work-engaging surface
Patent
1999-03-11
2000-06-27
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
408103, 408115R, B23B 4902
Patent
active
060799145
ABSTRACT:
An adjustable drill jig for forming door hardware mounting holes is described. The drill jig of the present invention includes a first plate adapted for placement against a first side of the door. A second plate is attached to the first plate via a chain linkage. The second plate is adapted for placement against a second opposite side of the door in a position aligned with and parallel to the first plate. Alignment means connected to the first plate and capable of attachment to the second plate ensure the two plates are aligned. The first and second plates each define a plurality of drill guide holes. The drill guide holes of the second plate are aligned with correspondingly sized drill guide holes of the first plate when the first and second plates are aligned. A plurality of bushing plates are also provided. Each bushing plate is capable of attachment to the first plate. Each bushing plate carries a predetermined pattern of drill bushings corresponding to a particular type of door hardware. A preselected one of the bushing plates is removably attached to the first plate in accordance with the particular type of door hardware being installed. Each bushing plate is attached to the first plate so that each drill bushing on the bushing plate is received in a correspondingly sized drill guide hole of the first plate.
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