Patent ID: 7073992

Claim:
An arbor for a hole cutter including an outer surface defining a threaded hole, and at least one pin hole spaced radially relative to the threaded hole, the arbor comprising: an axially-elongated arbor body including a first threaded portion formed on an end portion of the arbor body and defining a major thread diameter that is threadedly engageable with the threaded hole of the hole cutter, a shoulder formed adjacent to the first threaded portion and spaced radially outwardly therefrom, a drive shank formed on another end portion of the arbor body, and at least one first bearing surface extending axially along a portion of the arbor body between the shoulder and drive shank; a pin ring defining an aperture extending therethrough, an axial bearing surface formed on one side of the pin ring, at least one drive pin radially spaced relative to the aperture and extending axially from the axial bearing surface, and a second bearing surface forming at least a portion of a periphery of the aperture, wherein the arbor body is receivable within the aperture of the pin ring with at least one of the pin ring and arbor body being axially movable relative to the other, at least one of the first and second bearing surfaces is engageable with the other for preventing the pin ring and arbor body from rotating relative to each other, the at least one drive pin is receivable within the at least one pin hole of the hole cutter, at least one of the second and axial bearing surfaces is movable axially over the shoulder of the arbor body in a first direction, is engageable with the major diameter of the first threaded portion of the arbor body and is thereby prevented from further axial movement relative to the arbor body in the first direction, and the axial bearing surface of the pin ring is engageable with the hole cutter with the at least one drive pin received within the at least one corresponding pin hole; and a locking member engageable with the arbor body for releasably securing the axial bearing surface of the pin ring in engagement with the hole cutter.