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An area of contact between raceway and ball.

Related Terms

ADHESIVE WEAR

Often referred to as galling, scuffing, scoring, or seizing. It happens when sliding surfaces contact one another, causing fragments to be pulled from one surface and to adhere to the other.

ELASTOHYDRODYNAMIC LUBRICATION

In rolling element bearings, the elastic deformation of the bearing (flattening) as it rolls, under load, in the bearing race. This momentary flattening improves the hydrodynamic lubrication properties by converting point or line contact to surface-to-surface contact.

ANTI-FRICTION BEARING

A rolling contact type bearing in which the rotating or moving member is supported or guided by means of ball or roller elements. Does not mean without friction.

BRINELLING

Permanent deformation of the bearing surfaces where the rollers (or balls) contact the races. Brinelling results from excessive load or impact on stationary bearings. It is a form of mechanical damage in which metal is displaced or upset without attrition.

CAPILLARITY

A property of a solid-liquid system manifested by the tendency of the liquid in contact with the solid to rise above or fall below the level of the surrounding liquid; this phenomenon is seen in a small bore (capillary) tube.

INTERFACIAL TENSION (IFT)

The energy per unit area present at the boundary of two immiscible liquids. It is usually expressed in dynes/cm (ASTM Designation D 971.)

HIGH

An area of high pressure. Since a high is, on a synoptic chart, always associated with anticyclonic circulation, the term is used interchangeably with ANTICYCLONE

NONCONTACT BEARING

A bearing in which no solid contact occurs between relatively moving surfaces.

OXIDATION STABILITY

Ability of a lubricant to resist natural degradation upon contact with oxygen.

HORN ANTENNA

An antenna consisting of a waveguide the cross-sectional area of which increases toward the open end. Often shortened to HORN.
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