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Ball bearings the most widespread type of bearings. In them ball bodies of swing which slide in the racetracks executed on surfaces of external rings (holders) are applied and are put into the stamped or mechanically processed or synthetic (polymeric) separators. Thanks to dot contact between balls and a racetrack the friction moment at bearings of this kind is not big therefore they can gather big speeds of rotation.
On the perceived loading ball bearings are classified on:
- radial — perceive mainly radial forces;
- radial-stop and persistent and radial — perceive radial and axial efforts;
- persistent — perceive only axial forces;
- with four-dot contact — perceive axial loadings in both directions or the combined radial loading at simultaneous action axial.
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