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The Book of Terms

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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.

   

 

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

Heading Machine

1) A single or multiple die machine that, when the wire is struck, expands metal to form a head (as with nails) or fill a specially designed cavity (as with bolts or other fasteners). 2) A ma­chine for sorting needles to bring all the eyes or points together.

Heald Wire

High quality medium carbon steel wire used in making healds. Twin heald wire is made of two identical wires joined together along their length by tin.

Healds

A series of small eyelets made of wire through which the warp threads are drawn in a weaving machine and, according to whatever pattern is required, these are raised or lowered to form the space known as the shed, through which the shuttle is projected prior to beating up and interlacing. Also known as Heddles.

Hearth

The portion of a furnace that holds the molten metal or bath.

Heat

1) A form of energy, which raises the temperature of bodies into which it is absorbed. 2) A single batch of a single chemical composition that is produced at one time and is contained in a ladle. This liquid metal product is the feedstock for ingots or for continuous cast billets or blooms. 3) A furnace production run for melting or casting.

Heat and Pressure Cure

Uncured rubber or rubber-like compound that is usually contained under high pressure at a given temperature. The pressure, temperature and time required for curing depend upon the type of compound used.

Heat Cracked

A term used for disposing of water-based coolants. The most popular method involves adding heat or evaporating the water at low temperatures. Then, as the material in solution grows in concentration, it eventually breaks out so that the soluble oil or fats can be readily separated.

Heat Dissipation

The flow of heat from a hot body to a cooler body by convection, radiation and/or conduction.

Heat Distortion

Distortion of material or configuration due to the application of heat.

Heat Endurance

The time of heat aging that material can withstand before failing a special physical or electrical test.

Heat Resistance

Ability of a substance to maintain physical and chemical identity and electrical integrity under specified temperature conditions.

Heat Resistant

An insulation compound that can resist degradation caused by high temperatures.

Heat Seal

In cabling, a method of sealing a tape wrap jacket by means of thermal fusion.

Heat Shock

A test to determine the stability of a material by sudden exposure to a high temperature for a short period of time.

Heat Shrink Tubing

Tubing used to cover cable connections that shrinks when heat is applied.

Heat Sink

A part or fluid used to absorb heat from another device.

Heat Transfer

The passage of heat from a hot to a cold body, by conduction or convection through intervening layers of solid, liquid or gas. See Heat Dissipation and Conductivity Thermal.

Heat Treat Stain

Discoloration of the metal surface caused by oxidation during thermal treatment.

Heat Treatment

Heating and cooling a solid metal or alloy in a manner designed to achieve specific conditions or properties. Does not include heating exclusively for hot working.

Heater Cord

Flexible stranded copper conductor, cotton wrapped with rubber insulation and asbestos roving.
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