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The Book of Terms

The Book of TermsThe WJI Book of Wire & Cable Terms: an interactive experience of learning and sharing
This book, written by industry volunteers and containing more than 5,000 entries, is an asset for newcomers to wire and cable.

At the same time, it also represents an opportunity for industry veterans to give back by either updating or adding to the more than 5,000 entries. This is an honor system process. Entries/updates must be non-commercial, and any deemed not to be so will be removed. Share your expertise as part of this legacy project to help those who will follow. Purchase a printed copy here.

   

 

All   0-9   A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Follower

A sleeve used to compress the grommet, thus tightening the seal around wires entering the connector.

Forging

The working of metal to some pre-determined shape by hammering, upsetting, heading, extrusion or pressing (or a combination of these processes). The metal can be hot, warm or cold.

Forging Quality Steel

A special grade of semi-finished steel in the form of blooms, billets, or slabs that is suitable for forging. It must be free of pipe, excessive segregation and injurious surface defects.

Forging Rolls

Rolling mills that produce comparatively uniform shapes by using variable radii around the circumference of rolls that rotate in the opposite direction from those ordinarily used for rolling.

Forging Stock

A wrought rod, bar or other section suitable for subsequent change in cross-section by forging.

Forging Strains

Differential strains that result from forging or from cooling from the forging temperature, and that are accompanied by residual stresses.

Forging, Drop

One of four principal types of commercial forgings. With drop forgings, the shape is formed by repeated blows by a hammer onto a bar or bullet placed between a pair of dies.

Forging, Press

One of four principal types of commercial forgings. With press forgings, hydraulic pressure deforms the metal.

Forging, Roll

One of four principal types of commercial forgings. With roll forgings, the shaping is done by two rotating rolls.

Forging, Upset

One of four principal types of commercial forgings. With upset forgings, the cross-sectional area is in­creased while the thickness (or length) is decreased.

Form Wound

A coil or winding prewound on a form of a predetermined shape.

Forming

To shape or fashion with the hand or tools or by a shape or mold.

Forming Machines

Systems that are equipped with a number of sliding members fitted with appropriate tools that automatically drive against wire in succession, pressing it against a central former to create a desired shape.

Forming Properties

Those physical and mechanical properties (such as resistance to necking or ductile fracture, yield strength and strain hardening capacity) that allow a metal to be formed without injury to the finished product.

FOS

Designation for fuel-oxygen scrap process (in steel making).

Four-High Mill

A rolling stand which has four rolls, one above the other. This kind of mill has two work rolls, each of which is stiffened by a larger back-roll. Four-high rolls are used only on mills that roll flat products: slabs, plates, sheet and strips.

Fourdrinier Wire

Stainless steel wires once commonly used in paper-making machines. The wires were woven in width and length to suit individual machines, the warp wires welded to form an endless belt that is stretched over a series of rollers to keep the upper surface flat.

FPL

Designation of cable which meets Vertical Tray flame test for Fire Protection Signaling Systems.
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