Holesaw assembly

An arbor assembly for a holesaw, comprising:

• a shank including:
• a first portion couplable to a tool holder of a power tool,
• a second portion couplable to a holesaw;
• a drive pin supported by the shank and configured to engage an aperture in a base of the holesaw;
• a base support plate movable axially relative to the arbor body and configured to support the base of a holesaw;
• a support surface non-movable axially relative to the shank;
• and
• a resilient member disposed between the support surface and the base support plate, the resilient member biasing the base support plate axially toward the base of the holesaw;
• a drill bit carrier movably coupled to the shank and configured to be couplable to a drill bit, the drill bit carrier configured to move relative to the shank between an extended position and a retracted position, the drill bit carrier being closer to the first portion of the shank in the retracted position than in the extended position;
• and
• a retainer configured to selectively maintain the drill bit carrier in the retracted position, wherein release of the retainer permits movement of the drill bit carrier toward the extended position.

A hole cutting assembly comprising:

• a holesaw comprising a cylindrical wall defining an internal space configured to receive a plug of material formed during a cutting operation, a cutting edge coupled to a first end of the wall, and a base coupled to an opposite second end of the wall;
• an arbor assembly configured to be removably coupled to the holesaw and configured to rotate the cutting tool during the cutting operation, the arbor assembly comprising:
• an arbor body having a first threaded portion configured to engage a second threaded portion in the base of the holesaw,
• a drive pin supported by the arbor body and configured to engage an aperture in the base of the holesaw,
• a base support plate movable axially relative to the arbor body and configured to support the base of the holesaw,
• a support surface non-movable axially relative to the arbor body, and
• a resilient member disposed between the support surface and the base support plate, the resilient member biasing the base support plate axially toward the base of the holesaw;
• a drill bit having a cutting tip configured to create a pilot hole in a workpiece and a shaft configured to be coupled to the arbor, the drill bit movable relative to the arbor along a longitudinal axis between an extended position and a retracted position;
• a retainer associated with the arbor and configured to selectively maintain the drill bit in the retracted position;
• a biasing member configured to exert a force on the drill bit to move the drill bit toward the extended position when the retainer is disengaged;
• and
• a release actuator operable to release the retainer, wherein movement of the drill bit toward the extended position causes the drill bit to apply an ejection force to at least partially dislodge the plug from the internal space of the cutting tool.