- Counterboring is the enlargement of a portion of a hole that has previously been formed
- If the counterbored portion is shallow (1/8″ or less), the operations is usually known as spot-facing; for example, a flat seat for a bolt head or nut
- If, on the other hand, the hole is enlarged to a considerable depth, it is designated as counterboring
- These counterbores are made of two-piece construction, having an integral shank and counterbore-cutter, and a pilot that is interchangable, which provides flexibility in the use of the tool.
|Dimensions||6 × 4 × 2 in|
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