| 摘要 |
A tool to grip the outer periphery of an object being adaptable, for example, to remove a collar locked to the threaded shaft of a frangible fastener or operate as a drill stop. The tool includes an outer cylinder having a threaded portion and an inner cylinder having complementary threaded portion. A collet is disposed in the volume defined by the outer cylinder and is positioned to receive an axial force from the inner cylinder when translated via rotation with respect to the outer cylinder. The collet has a segment removed to permit the collet to decrease in size upon application of a constrictive radial force. The collet further has a frusto-conical outer surface that acts upon a complementary surface on the inner portion of the outer cylinder. When the collet is acted upon by the inner cylinder, a compressive radial force is applied thereto, which results in the collet constricting to securely and nearly uniformly grasp any object located within the collet. If adapted for use as a drill stop, an end stop can be rotatably coupled to the outer cylinder to prevent unintentional damage to the material being drilled.
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