OTHER WORDS FROM counterborecoun·ter·bor·er, noun
Words nearby counterbore
How to use counterbore in a sentence
That it may always do this and yet leave sufficient clearance, the counterbore has been devised.Farm Engines and How to Run Them|James H. Stephenson
The jaw end is counterbored out with a 45-degree counterbore to form a bearing for the forward end of the micrometer screw.Measuring Tools|Unknown
For enlarging a hole for a certain distance the counterbore is employed.
A counterbore in the arbor hub provides clearance for the hub of the pulley which projects beyond the rim on one side.Turning and Boring|Franklin D. Jones
For counterboring small holes or for facing the metal around their ends, the form of counterbore shown in Fig. 1746 is employed.