Qualtech DEWPIL5/16X1/4 Round Shank Pilot, 5/16 in dia Head, 1/4 in dia Shank, 1-7/8 in OAL, HSS, Bright
Features
- Counterboring is the enlargement of a portion of a hole that has previously been formed
- If the counterbored portion is shallow (1/8 in 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 2-piece construction, having an integral shank and counterbore cutter and a pilot that is interchangeable, which provides flexibility in the use of the tool
