9998 Doerr Lane, Schertz, TX 78154 USA | 210.651.7322

516 S. 25th West Ave.Tulsa, OK 74127 USA | 918.584.2671

– C –

Carbon Residue The residue remaining after the evaporation of a sample of mineral oil under specified conditions, i.e., Ramsbottom and Conradson.

Centipoise (cP.) A unit of absolute viscosity. 1 centipoise = 0.1 poise.

Centistoke (cSt.) A standard unit of kinematic viscosity = 0.10 stoke

Cetane Number A number that expresses the ignition quality fo diesel fuel and equal to the percentage by volume of cetane (C16H34) in a blend with methyl naphthalene, which blend has the same ignition performance to the test fuel.

Channel Point Lowest safe temperature that a gear lubricant can be used.

Circulating Lubrication A system of lubrication in which the lubricant, after having passed through a bearing or group of bearings, is re-circulated by means of a pump.

Cleveland Open Cup See Flash Point, Fire Point

Coefficient of Friction The ratio of the friction force between two bodies to the normal, or perpendicular, force between them.

Compounded Oil – A petroleum oil to which has been added other chemical substances.

Consistency A term used synonymously with the term Penetration Number of a grease.

Corrosion The attrition or wearing away of a substance by acid or electrochemical action.

Cup Grease An early term for a calcium or lime base grease, practically obsolete now but meant originally to designate a degree of quality suitable for grease cup application.

Cutting Fluid or Oil Any fluid applied to a cutting tool to assist in the cutting operation by cooling, lubricating or other means.

Royal Agricultural Lubricant Guide 2020

Enter your email to download our free Agricultural Lubricant Guide


Newsletter sign up

Contact Us

Performance Grease Guide

Enter your email to download our free performance grease guide