Self-Aligning Bearings

Frequently asked questions — Self-Aligning Bearings

• Why choose a self-aligning bearing rather than a cylindrical roller model?

  The self-aligning bearing is specifically designed to allow the inner ring to tilt relative to the outer ring. This self-orienting capability makes it possible to compensate for an initial or dynamic mounting misalignment. Unlike the cylindrical roller bearing, the self-aligning bearing thereby reduces the stresses exerted on the raceways and rolling elements during variations in geometry, thus preserving the functional integrity of the assembly in environments subjected to these specific constraints.
• What are the key technical criteria for selecting a self-aligning bearing?

  The selection of a self-aligning bearing is based on three main technical criteria: the radial load applied to the component, the anticipated rotational speeds, and the conditions of the mechanical environment. It is also essential to comply with the boundary dimensions defined by the ISO 15 standard to guarantee interchangeability. The selection must furthermore take into account the static load rating in accordance with the ISO 76 standard, as well as the dynamic load rating and the basic rating life defined by the ISO 281 standard.
• How can the precision of assemblies be guaranteed when using self-aligning bearings?

  The precision of assemblies is ensured by compliance with the dimensional and running tolerances governed by the ISO 492 standard. For optimum performance, the mounting accessories, locking devices and bearing accessories should also be selected with care. These items must be chosen for their technical compatibility with the selected bearing in order to ensure the kinematic consistency of the installation, whichever brand is chosen from the available options such as TIMKEN, SKF, INA or FAG.
• What is the impact of the ISO 15 standard on the choice of a self-aligning bearing?

  The ISO 15 standard defines the boundary dimensions that any self-aligning bearing must meet. Strict compliance with these dimensions is essential to ensure the interchangeability of components within your mechanical installations. This dimensional standardisation secures the selection and replacement process, ensuring that the bearing fits perfectly into the spaces provided without compromising the operating tolerances required by the associated precision standards.