| 摘要 |
A drill and tap guide includes an elongated body having top and bottom surfaces, first and second sides and first and second ends. The body presents a longitudinal axis and a width dimension tapering from the first end toward the second end. A plurality of guide holes are formed through the body between the top and bottom surfaces and aligned along the longitudinal axis. The guide holes each have a unique diameter and are spaced along the longitudinal axis so that a first line generally cotangent with each of the holes is generally parallel with the first side and a second line generally cotangent with the holes is generally parallel with the second side. A positioning notch is formed in the bottom surface and generally parallel to the longitudinal axis. A method of boring a substantially perpendicular hole in a workpiece having a nonplanar sidewall includes the steps of positioning the body of the guide on the workpiece with the notch facing the sidewall of the workpiece so that the guide hole having a desired diameter is positioned over a desired position on the workpiece for the perpendicular hole. The notch aligns the body so that a perpendicular relationship exists between the guide holes and a line cotangent to the sidewall and adjacent to the guide. Once the guide is properly positioned, a hole is formed through the workpiece using a conventional drill.
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