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Formed by a line drawn between the areas of ball and ring contact and a line perpendicular to the bearing axis.



Related Terms

RADIAL CLEARANCE

The radial internal clearance of a single row radial contact ball bearing is the average outer ring race diameter, minus the average inner ring race diameter, minus twice the ball diameter.

ANGULAR CONTACT BEARING

A type of ball bearing whose internal clearances and ball race locations are such as to result in a definite contact angle between the races and the balls when the bearing is in use.

AXIAL INTERNAL CLEARANCE

The total maximum possible movement parallel to bearing axis of inner ring in relation to outer ring in ball or roller bearing assembly. Also called bearing end play.

SELF ALIGNING BALL BEARING

Spherical outside diameter ball bearing which can accommodate initial angular misalignment between the outer ring and its mating spherical aligning ring or housing seat.

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.

CONCENTRIC LOCKING COLLAR

A ring fitting over extended inner ring of insert bearing and having setscrews which pass through holes in inner ring to make contact with shaft.

COUNTERBORED BALL BEARING

A non-separable ball bearing with one side of the raceway removed from either or both rings to facilitate manufacturing assembly. A portion of one race shoulder turned and ground away to facilitate assembly with a greater number of balls. Normally the outer ring is counterbored.

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.

RADIAL TYPE BEARING

A rolling element bearing primarily designed to support load perpendicular to the axis.

MERIDIAN

A north-south reference line, particularly a great circle through the geographical poles of the earth. The term usually refers to the upper branch, the half, from pole to pole, which passes through a given place; the other half being called the lower branch. An astronomical (terrestrial) meridian is a line connecting points having the same astronomical longitude. A geodetic meridian is a line connecting points of equal geodetic longitude. Geodetic and sometime astronomical meridians are also called geographic meridians. Geodetic meridians are shown on charts. The prime meridian passes through longitude 0°. Sometimes designated TRUE MERIDIAN to distinguish it from magnetic meridian, compass meridian, or grid meridian, the north-south lines relative to magnetic, compass, or grid direction, respectively. A fictitious meridian is one of a series of great circles or lines used in place of a meridian for certain purposes. A transverse or inverse meridian is a great circle perpendicular to a transverse equator. An oblique meridian is a great circle perpendicular to an oblique equator. Any meridian used as a reference for reckoning time is called a time meridian. The meridian used for reckoning standard zone, daylight saving, or war time is called standard, zone, daylight saving, or war meridian respectively. The meridian through any particular place or observer, serving as the reference for local time, is called local meridian, in contrast with the Greenwich meridian, the reference for Greenwich time. A celestial meridian is a great circle of the celestial sphere, through the celestial poles and the zenith. Also called CIRCLE OF LATITUDE.

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