Swaging

[3] Swages were originally tools used by blacksmiths to form metal into various shapes too intricate to make with a hammer alone.

[4][5] Another (less common) pronunciation sometimes heard in the metalworking industries is /ˈswɛdʒ/ (AHD format: swĕj)[6] (perhaps influenced by sledge as in sledgehammer).

Rotary swaging is usually a cold working process, used to reduce the diameter, produce a taper, or add a point to a round workpiece.

The flaring is done with a pair of rolls that travel around the hole and are fed down into the part, deforming the metal in a controlled, predicted way.

[8] In printed circuit board assembly individual connector pins are sometimes pressed/swaged into place using an arbor press.

Some pins have a hollow end that is pressed over by the arbor's tool to form a mushroom-shaped retaining head.

In sawmills, a swage is used to flare large bandsaw or circle saw teeth, which increases the width of the cut, called the kerf.

A much earlier version of the same operation used a hardened, shaped swage die and a hand held hammer.

Swaging is a major advance over filing as the operation is faster, more precise and greatly extends the working life of a saw.

When dealing with rubber components with mold bonded metal sleeves, swaging provides a more controlled and cost-effective alternative to 'shooting' the rubber part into a metal sleeve, where an intensive and less dependable secondary operation is needed to finish the product.

In internal ballistics, swaging describes the process of the bullet entering the barrel and being squeezed to conform to the rifling.

Since metals expand when heated and contract when cooled, cast bullets must be cast with a mold slightly larger than the desired finish size, so that as the molten metal cools, it will harden at just the right point to shrink to the desired size.

The swaging process in reference to cold flow of metals into bullets is the process not of squeezing the metals into smaller forms but rather pressing smaller thinner items to form into shorter and slightly wider shapes.

In musical instrument repair the usual term on both sides of the Atlantic is swedging, not swaging, though it is generally acknowledged that the former derives from the latter.

This gives rise to floppy keys and a poor air-seal and needs to be corrected by lengthening (swedging) the hinge tube.

Loose leads in underlevers tend to be the most annoying to pianists because it's difficult to pinpoint where the noise (often a "tick" sound) is coming from.

However, instead of using screw threads which connect to a nut using a turning motion, a lockbolt has annular grooves around the shaft of the bolt (pin).

During the installation cycle of a lockbolt, the collar is deformed around the pin with locking grooves using special tooling.