Basic selection criteria

Each bearing type displays characteristic properties, based on its design, which makes it more, or less, appropriate for a given application. For example, deep groove ball bearings can accommodate radial loads and axial loads. These bearings, which are also available in the SKF Energy Efficient performance class, can be manufactured with a high degree of running accuracy and are available in quiet running variants. Therefore, they are preferred for small and medium-size electric motors.
Spherical and toroidal roller bearings can accommodate very heavy loads and are self aligning. These properties make them popular for applications, where there are heavy loads, shaft deflections and misalignment.
Since several factors have to be considered and weighed when selecting a bearing, no general rules can be given. The following factors are the most important to be considered when selecting a standard bearing:
  • available space
  • loads
  • misalignment
  • precision
  • speed
  • friction
  • quiet running
  • stiffness
  • axial displacement
  • mounting and dismounting
  • sealing solutions
The total cost of a shaft system and inventory considerations can also influence bearing selection.
Some of the most important criteria to consider when designing a bearing arrangement are covered in depth in separate sub-sections of Principles of bearing selection and application. These include load carrying capacity and life, friction, permissible speeds, bearing internal clearance or preload, lubrication and sealing solutions.
Detailed information on the individual bearing types, including their characteristics and the available designs, is provided in each product section.
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