From Standard Handbook of Plant Engineering, Third Edition

Industrial Division Engineering Staff

The Torrington Company
Torrington, Connecticut



Aligning bearing
A bearing which, by virtue of its shape, is capable of considerable misalignment.
Antifriction bearing
A term given to ball and roller bearings to distinguish them from non-rolling-element bearings, i.e., sliding bearings.
Average life
See median life.
Axial internal clearance
The measured maximum possible movement parallel to the bearing axis of the inner ring in relation to the outer ring.
Axial load
See thrust load.
Ball bearing
An antifriction bearing with balls as rolling elements.
Basic dynamic radial (axial) load rating (BDLR/BDALR)
The constant stationary radial load (constant centric axial load) that a rolling bearing can theoretically endure for a basic rating life of 1 million (10 6) revolutions.
Basic static-load rating (BSLR)
The static load that corresponds to a total permanent deformation of ball and race, or roller and race, at the most heavily stressed contact (0.0001 in [0.00254 mm] of the ball or roller diameter).
Bearing runout
Radial or axial displacement of the surface of a bearing relative to a fixed point when one raceway is rotated with respect to the other raceway.
Bearing series
A graduated dimensional listing of a specific type of bearing.
The area of the bearing making contact with the bearing seat on the shaft.
Boundary dimensions
Dimensions for bore, outside diameter, width, and corners.
A bearing component that partly surrounds all or several...

Products & Services
Roller Bearings
Roller bearings are used in rotary applications to replace sliding movement with low friction, rolling motion. The principal types of roller bearings are cylindrical, spherical, and tapered.
Ball Bearings
Ball bearings are used to provide smooth, low friction motion in rotary applications. Ball bearings types include radial ball bearings (deep groove and angular contact) and thrust ball bearings.
Needle Roller Bearings
Needle roller bearings are a type of radial roller bearing with rollers whose length are at least four times their diameter. These bearings are valued for their high load capacity and low sectional height.
Flange Mounted Bearings
Flange mounted bearings are used when a shaft axis is perpendicular to the bearing mounting surface. They are available in 2, 3, or 4-hole configurations.
Thrust Bearings
Thrust bearings are comprised of components which support axial loads, and little to no radial loads. Types include tapered, cylindrical, spherical, and needle roller thrust bearings, thrust ball bearings, fluid-film thrust bearings, and magnetic thrust bearings.

Topics of Interest

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