The accuracy of the fit of a rolling bearing, ball bearing or wire race bearing to a design is determined by bearing tolerances. These specific deviations from the nominal size of the bearing components are taken into account during production to ensure correct function, service life and performance.
Standards such as ISO 492 and DIN 620 define the limits for these deviations, including inner and outer diameter, running accuracy and rolling element geometry. Tolerances that are too tight can cause premature failure, while tolerances that are too wide can lead to poor fit and reduced rigidity.
Important bearing tolerances:
- Inner and outer diameters: deviations from nominal size to ensure a precise fit.
- Running accuracy: Refers to the roundness and cylindricity of the running surfaces to enable smooth movement.
- Rolling element geometry: Shape and size of rolling elements, such as balls or rollers, to ensure even load distribution.
Selecting the correct tolerances for ball bearings, wire race bearings and other rolling bearings depends on various factors, such as the specific application, load, operating conditions and accuracy requirements. A correct tolerance ensures that the bearings provide the required performance and achieve an appropriate service life.
In addition to the tolerances mentioned, other factors such as temperature, lubrication and mounting also influence the performance and service life of rolling bearings. It is important to consider all these aspects to ensure the best possible performance of bearings in various industrial applications.