છિદ્રના ઉપરના ભાગને મોટું કરવા માટે થોડું વધારે,

counterbore's Usage Examples:

diameter section referred to as the pilot, a feature essential to assuring concentricity between the counterbore and the hole being counterbored.

A rivet nut, also known as a blind rivet nut, or rivnut, is a one-piece internally threaded and counterbored tubular rivet that can be anchored entirely.

following commission, including excessively high noise levels and cylinder counterbore cracking in the high-speed engines.

The counterbore in the rear flange of the crankshaft was a 1+1⁄4 inches (32 mm) diameter.

as face mills, shell mills, endmills, and form cutters; various drills, reamers, taps, countersinks, counterbores, and core drills; various turning tools.

where the bolt"s head will sit, which is often done by cutting a shallow counterbore, just deep enough "to clean up"—that is, only enough material is removed.

It was found that inserting a counterbore here reduced wetting.

The counterbore is often covered with a dust cover.

Year Modifications 57 1964 Introduction 57-1 1982 Eliminate cylinder counterbore and pinned barrel, change in cylinder length to 1.

Comparison of countersunk and counterbored holes.

Rotary cutting tools include drill bits, countersinks and counterbores, taps and dies, cutters[disambiguation needed], reamers.

filleted pole (right) and non-filleted pole (left) A workpiece with a countersunk hole (left) and a workpiece with a counterbored hole (right) Surface.

In solid timber work it is common to counterbore a hole in the frame or carcase member to conceal the head of the screw.