| 主权项 |
1. A hole saw comprising:
a cylindrical body disposed along an axis of rotation with a side wall extending axially from a cap end to a cutting end, the cutting end including a plurality of cutting teeth; and a cap including a rim portion seated on the cap end and an axially extending portion extending into the cylindrical body from the cap end; wherein the side wall defines an aperture comprising:
a first slot portion; anda second slot portion disposed closer to the cap end than the first slot portion, the second slot portion including a first wall oriented substantially perpendicular to the axis and a second wall oriented substantially perpendicular to the axis, the first wall of the second slot portion nearest the cap end being between approximately 0.010 inches and approximately 0.120 inches axially offset from the axially extending portion of the cap; wherein the first slot portion includes an upper wall and a lower wall, each oriented substantially perpendicular to the axis, the lower wall of the first slot portion being closer to the cutting end; and wherein the aperture has a first side and a second side, the first side including the first wall, the second wall, and the upper wall, the second side being non-linear and generally matching a contour of the first side, the second side including a bump curved toward the first side and a radial wall that provides a smooth transition from the first wall of the second slot portion to the bump with no undercut. |
