| 摘要 |
A tap sharpener has a base defining a base axis and carrying a support which is pivotal on the base about a support axis inclined to the base axis. A tap holder is fixed on the support for joint rotation therewith about the support axis and has a retainer for securing a tap on the tap holder with the central axis of the tap extending parallel to the support axis. A slide between the holder and the support allows for displacement of the holder on the support in a direction passing perpendicularly through the support axis and through the central axis of a tap secured by the retainer in the holder. An indexing stop is provided for angularly positioning the tap relative to the holder in a predetermined angular position relative to the tap axis and to the support. The sharpener allows virtually any type of tap to be sharpened with any type of angular and axial relief angle.
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