counterbore


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counterbore

(ˈkaʊntəˌbɔː)
n
(Building) another name for countersink
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.counterbore - a bit for enlarging the upper part of a holecounterbore - a bit for enlarging the upper part of a hole
bit - the cutting part of a drill; usually pointed and threaded and is replaceable in a brace or bitstock or drill press; "he looked around for the right size bit"
References in periodicals archive ?
the bolt held--but the force enlarged the bolt counterbore wall to a size larger than if it were meant for a belted magnum cartridge (shown at right for comparison).
And with the exception of a narrow extractor notch machined through the boltface counterbore wall, the rim of a chambered cartridge is also enclosed by a solid ring of steel.
Meusburger has launched a range of O-ring counterbores that it says are especially designed for use in mould and tool making.
Finally, it's off the center for a counterbore, drill and tap, then slit with a slitting saw and finish up with an end mill.
FBM will detect solid machining features for the chosen FBM operation type, based on selection criteria; machine pockets using 2D roughing, rest mill, and finish operations; automatically support closed, open, nested, and through-pockets and set-the-right-toolpath options; optionally create a separate finish toolpath for floors and walls; identify when external machining is required and enable users to activate or deactivate it; identify when facing is required; create drilled, tapped, counterbore, and countersink holes; perform deep drilling, spot drilling, pre-drilling, tool selection, and tool creation if needed; provide advanced controls to drill blind, through, co-axial, and split holes; and select the appropriate tools for all operations.
As long as the plug is not engaged with the counterbore as shown in Figure 5, the "cushion" has no effect.
Configurable heights in 1 mm increments from 3 mm to 20 mm are offered with compact counterbore design for flush fitting in tight spaces.
A compact counterbore design for flush fitting the stopper blocks in tight spaces.
This is followed by a two-pass drilling operation to produce the counterbore and the bolthole.
The outer diameter of the diaphragm is contained by a counterbore in the valve body, a design that controls diaphragm extrusion and further sustains seal integrity during thermal cycling.
The AD requires measuring the diameter of the hole counterbore of the outboard idler hinge fitting of the left and right wing flap; the performance of repetitive high frequency eddy current inspections to detect cracks at the flap idler hinge fitting if necessary and replacement of the flap idler hinge fitting with a new like part if any crack is detected.
That doesn't mean later guns without the counterbore and pinning aren't good.