There are two main types of bearings: journal and rolling element.
Journal bearings are the simplest bearings. With no moving parts, the portion of the shaft in contact with the bearing or journal rides on a thin film of oil to support the shaft. Journal bearings are economical, compact, lightweight, and have a high load-carrying capacity. Rolling element bearings for industrial machinery come in four standard types: ball, cylindrical, spherical, and tapered bearings. Ball bearings separate the rotating shaft from the stationary mounting by rotating balls. This allows for a more even distribution of load and lowers friction compared to journal bearings. Cylindrical roller bearings use the same principle as ball bearings but have higher radial load capacity. They typically have lower axial load capacity than ball bearings. With a spherical roller bearing, rollers are thicker in the middle and thinner at the ends. This type of roller can accommodate both static and dynamic misalignment better than other bearing types. Spherical rollers are more difficult to produce with higher friction than cylindrical rollers. Tapered roller bearings are designed to take radial and axial loads simultaneously where other bearings are designed to take only one at a time. For more information on condition monitoring basics, visit padiaent.com.
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