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 last thing I want to mention is that if the shoulder bolt or ejector sleeve is large enough, and the counterbore is deep enough, you can install a bushing on the shoulder to support the floating plate.
Dimension Measured value Hole inlet diameter 172.5 [+ or -]1.8 [micro]m Hole outlet diameter 173.1 [+ or -]1.8 [micro]m Hole inlet radius of curvature 4.3 [+ or -]1.8 [micro]m Hole outlet radius of curvature 6.8 [+ or -]1.8 [micro]m Hole length 151.9 [+ or -]1.8 [micro]m Hole drill angle 37.2 [+ or -]0.2[degrees] Counterbore diameter 388.3 [+ or -]1.8 [micro]m Counterbore fillet radius 49.8 [+ or -]1.8 [micro]m Counterbore depth 394.6 [+ or -]1.8 [micro]m Minimum cross-section area at 0.25 [+ or -] 0.03 [mm.sup.2] needle seat at max.
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.
On top and the bottom of the work piece, two counterbore holes were drilled to screw the work piece firmly to the dynamometer.
One touch I like to add is milling down the bottom strap so the bottom strap screw head is slightly proud in its counterbore. Then, the head can be nicely domed as on vintage Colts.
The Low Clearance Split Frame line includes 14 models to cut, bevel and counterbore in tighter quarters.
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.
A counterbore, machined into the head, has a very close fit on the cylindrical portion of the plug.
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.