For example, a counterbore
locking fastener arrangement secures a flywheel, weighing several thousand pounds, to canning machinery.
The Ingersoll Quad-Bore also uses square inserts, which are fundamentally stronger than the triangular inserts found in conventional indexable counterbores
Again the coating might have been the problem, but I had to counterbore
the hole to guarantee a slip fit for the plunger.
Ejection is accomplished by a plunger-type ejector that is set in the outer edge of the bolt face counterbore
This includes an 8-40 taper and bottoming tap, numbers 28 and 19 wire gauge drills, an 8-40 Fillister counterbore
and a dozen each of 1/4-inch and 3/8-inch socket head screws.
Peter Matysiak of Emuge Corporation was boasting of his new "Mosys" tool holder that, when used with Emuge's Thrillers can drill, thread, chamfer, and spot face or counterbore
in one pass.
holes for the screw-hole buttons 3/16 in.
A foolproof method of making this hole is to use a guided through-hole counterbore
with a special pilot that fits the newly drilled 1/4-28 threaded hole and the counterbore
1mm diameter automatic transmission gear with a deep counterbore
, a combination of wiper-geometry and high-performance boring inserts cut cycle time 17 percent.
Create the recess with a counterbore
bit (Photo 3 inset), which you can buy at any hardware store for about $2.
European Cutting Tooling Systems produces a new one-piece counterbore
or countersink type bit.
The crown is flat with a rough "bubba-like" counterbore
to break the transition at the muzzle.