counterbore
Americannoun
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a tool for enlarging a drilled hole for a portion of its length, as to permit sinking a screw head.
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the portion of the hole so enlarged.
verb (used with object)
Other Word Forms
Etymology
Origin of counterbore
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
See Examples For:
If taken off at all it must be pulled, for the dowel-pins, key and counterbore are close fits.
From Steam Turbines A Book of Instruction for the Adjustment and Operation of the Principal Types of this Class of Prime Movers by Collins, Hubert E. (Hubert Edwin)
For counterboring small holes or for facing the metal around their ends, the form of counterbore shown in Fig.
From Modern Machine-Shop Practice, Volumes I and II by Rose, Joshua
A counterbore in the arbor hub provides clearance for the hub of the pulley which projects beyond the rim on one side.
From Turning and Boring A specialized treatise for machinists, students in the industrial and engineering schools, and apprentices, on turning and boring methods, etc. by Jones, Franklin D.
When the cannon is loaded, a small quantity of powder is placed in the counterbore, and the spark between C and E ignites this and discharges the cannon.
From The Boy Mechanic: Volume 1 700 Things for Boys to Do by Popular Mechanics Co.
For enlarging a hole for a certain distance the counterbore is employed.
From Modern Machine-Shop Practice, Volumes I and II by Rose, Joshua
Instead of the hole being countersunk, however, it may be cupped or counterbored, as in Fig.
From Modern Machine-Shop Practice, Volumes I and II by Rose, Joshua
The holes can be counterbored for the heads and then plugged.
From Mission Furniture How to Make It, Part 3 by Windsor, H. H. (Henry Haven)
The large end of the sleeve is counterbored to receive the worm, and is cut away on the under side to allow the worm to drop into mesh with the gear.
From Modern Machine-Shop Practice, Volumes I and II by Rose, Joshua
The tool was fastened in the holder while its cutting edge was in the groove referred to, cut as deep and as far up the cylinder as the counterboring was to be.
From Modern Machine-Shop Practice, Volumes I and II by Rose, Joshua
The counterboring was then accomplished in the manner shown in Fig.
From Modern Machine-Shop Practice, Volumes I and II by Rose, Joshua
For counterboring small holes or for facing the metal around their ends, the form of counterbore shown in Fig.
From Modern Machine-Shop Practice, Volumes I and II by Rose, Joshua
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
