1) A fatty or greasy liquid obtained from plants, animals or minerals used for manufacturing. 2) A lubricant used to reduce wear in machines. 3) Substance which, along with greases and other petroleum-based products, is used for quenching in hardening and tempering and as a corrosion-preventing agent. The re­quirements which may be detailed in specifications or quenching oils are viscosity, acid value, saponification value, flash point, loss in heating (volatility) and thermal conductivity. Such oils should also be highly refined and thus free from un­stable constituents so as to improve the resistance of the oil to oxidation.

To bring cable to a stage fit for use in an accelerated manner (to simulate field conditions) by placing it in an oil bath, heating it to a pre-set temperature and continuing thus for a given time. At the end of the oil bath test, the cable is subjected to physical and electrical tests to evaluate any decline in its properties.

Thermal treating high-carbon wire in the finished size by heating above the critical range, quenched in oil and reheating or tempering. The actual tempering does not take place in oil, as the term for this process would seem to indicate. See Hardening.

An oil used to reduce friction. There are two types: vegetable oils and oils produced from a mineral base. The lubricant must have suffi­cient viscosity at the temperature present to form a satisfactory oil film. Many oils are formulated with other ingredients to enhance their performance.

See Vitriol.

Immersion of hot metal in oil after heat-treatment to cool at a desired rate. See Quenching.

The ability of a conductor or cable insulation to resist physical degradation caused by exposure to oil.

A condition of surface quality when stains are produced by the incomplete burning of lubricants on the surface of a product. Subsequent operations on the stained area will change color of the stain to further add to the poor quality issue.

Oil storage tanks situated at intervals along the route of an oil-filled cable or at oil-filled joints of solid cable for the purpose of keeping the cable constantly filled with oil under pressure.

An impregnated, paper-insulated cable so designed that the impregnating fluid is free to flow at all working temperatures. One or more internal oil ducts are provided and oil is maintained under pressure by means of oil tanks connected to the cable at suitable positions along the route.

A pipe cable in which the pressure is developed by an oil that has access to the insulation.

Used to describe tool or alloy steels where oil is used as the quenching medium in the hardening process.

Able to operate safely despite the accumulation of oil or vapors.

Constructed to prevent the entrance of oil or vapors under normal operating conditions.

A final product that has had an application of a thin film of oil to retard rusting. Where surface is a consideration, it is also desirable for reducing friction scratches that may develop in transit. The oil coating is not intended to serve as a lubricant for subsequent fabrication.

Oils, often water-soluble, used in the grinding and machining of metal products, such as spring ends.

Designation for Overload.

Galvanized wire that will withstand immersion in a standard neutral copper sul­fate solution for one minute

A circuit that is energized but is not continuous, preventing current flow.

The end of an open coiled helical spring that has been ground flat.