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Glossary

Definitions:

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

Abbreviations       Organizations

W

Wear

The attrition or rubbing away of the surface of a material as a result of mechanical action.

Weld point

The lowest applied load in kilograms at which the rotating ball in the Four Ball EP test either seizes and welds to the three stationary balls, or results in extreme scoring of the three balls.

White oil

Highly refined mineral oil, essentially colorless, odorless, and tasteless. White oils have a high degree of chemical stability. White oils have many industrial applications - including textile, chemical, and plastics manufacture - where their good color, non-staining properties, and chemical inertness are highly desirable.

Wicking

The vertical absorption of a liquid into a porous material by capillary forces.

Worked Penetration

The penetration of a sample of lubricating grease immediately after it has been brought to 77°F and then subjected to 60 stokes in a standard grease worker. This procedure and the standard grease worker are described in ASTM Method D 217