Another and simple form of square centre for countersinking is shown in Fig.
If the countersinking is done before the end of the work is squared, it will not be true with the centre-drilled hole.
In this case it is assumed that the centre-drilling and countersinking are true one with the other.
But it is more troublesome to hold the work rigidly while countersinking it than it is to simply hold it in the hands, and for these reasons the square centre is an excellent tool to produce true countersinking.
The centre drilling and countersinking may, when the work is cut to length, be performed at one operation, but when it requires to be cut to length in the lathe, that should be done before the countersinking.
These indentations are produced after the countersinking by the punch, shown in Fig.
Deep countersinking can be done by first boring a hole large enough to admit the head of the screw to the depth required, when the hole can be continued with a smaller bit.
If the rails are not too deep, vertical holes can be bored, countersinkingdeeply if necessary.
Fasten the end pieces on with screws, countersinking the heads of the vise end.
The object of countersinkingthese holes is to reduce the bearing surface of a small shaft that is to be supported in the holes and must be as free from friction as possible.
Remove the clay from the other half of the face, and after countersinking two or three shallow holes in the edge of that part of mold already made and coating that edge with clay water, pour plaster for the second piece of mold.
Fasten securely on whatever form of mounting you have decided on, countersinking the wires on the under side.
Fasten both antlers on this in a natural position in relation to each other, then drill a second hole in each and bolt them fast, using machine bolts and countersinking the heads in the antlers by chiseling.
Countersunk riveting is generally tighter than snapped, because countersinking the hole is really facing it; and the countersunk rivet is, in point of fact, made on a face joint.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "countersinking" in a variety of sentences. We hope that you will now be able to make sentences using this word.
