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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

Free Connector

A connector for attachment to the free end of a wire or cable.

Free Cutting Steel Wire

Wire made from steel that has had sulfur, lead or other elements added to improve machinability.

Free Fatty Acid

A component in the blended coolant to attach the lubricant particles to the wire so they will be carried through the die for proper lubrication. Note: if the FFA level climbs too high, the result could be unwanted dirtiness or unwanted slippage caused by the formation of copper soaps.

Free Ferrite

Ferrite that is formed directly from the decomposition of hypoeutectoid austenite during cooling, without the simultaneous formation of cementite. Also called proeutectoid ferrite.

Free Length

The length of a spring when it is unloaded.

Free Machining

The property that makes machining easy because of the forming of small chips, a characteristic imparted to steel by sulfur, lead or bismuth. Similarly, free machining brass contains lead.

Free Slab Equilibrium

A phrase used in computing forming forces where shear losses over surfaces of velocity discontinuity are added.

Fremont Test

A type of impact test.

Frequency

The number of cycles by an alternating current in one second. Usually expressed as hertz, which is equivalent to one cycle per second.

Frequency Response

The characteristic of a device denoting the range of frequencies over which it may be used effectively.

Fretting

A type of wear that occurs between tight fitting surfaces, such as wire on spools that are subject to a small cyclical motion as often found in surface transportation. Fretting usually manifests itself as a problem known as fretting corrosion in the area of the metal-to-metal contact.

Fretwork Saw Blade Wire

A narrow saw blade, typically 5 in. long, that is made from steel wire having a carbon content varying from 1.0 to 1.4 percent. This type of saw, which can be used for ornate designs requiring sharp turns, is called a scroll saw.

Friction Tape

An insulating tape made of asphalt-impregnated cloth.

Frictional Heat

Heat generated at the stock surface and within the stock as a result of frictional contact with the tool or die.

FRMR

Designation for flame retarding, moisture-resisting finish.

Front Barrel Flange

A flange at the end of the barrel to which the die or adapting member is fastened.

FRP

Designation for Fiberglass Reinforced Plastics.

FSCV

Designation for liquid salt continuous vulcanization.

FT1

Designation for one of several CSA flame test designations for wires and cables that pass the C22.2 No. 0.3 test requirements. (Other designations include FT2, FT4, etc.)

FTP

Designation for Foiled Twisted-Pair Cable. This cable type has twisted insulated copper conductors within a foil shield and having a drain wire bound in a single sheath to protect the cable from electromagnetic interference.
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