| 摘要 |
A multi-function drill bit assembly with slideably positionable hole saw comprising an elongate bit member, a reversible arbor member, and a hole saw member. The elongate drill bit member has a drilling portion and an attachment portion, with the drilling portion having a sharp cutting tip and the attachment portion having at least one flat surface running longitudinally across. The reversible arbor member has a cylindrical cavity extending axially therethrough with the attachment portion of the drill bit member being slideably disposed in the cylindrical cavity. The arbor member has a first portion and a cylindrical skirt portion, the cylindrical skirt portion extending outwardly from the first portion and being generally concentric with the cylindrical cavity. The cylindrical skirt portion has an exterior surface with a first set of threads running circumferentially across. The hole saw member has a cylindrical body with a closed end and an open end. A plurality of cutting teeth peripherally extend from the open end. The closed end has an aperture therethrough with a second set of threads extending circumferentially around the aperture, the second set of threads being axially aligned to correspond with the first set of threads. The cylindrical skirt portion of the arbor member is disposed in the aperture in the hole saw member, and the elongate drill bit member is disposed in and extends through the hole saw member. |
