Each record carries the model designation, brand (or generic ISO interchange), series and bearing type, d/D/B boundary dimensions in mm, seal and clearance codes, tolerance class, cage material, dynamic and static load ratings where a catalogue value exists, estimated mass and the source citation. The page_path column links every row to its canonical specification page on this site.

Load ratings flagged on the site as derived estimates (median of same-envelope, same-type catalogue rows) are included as published — treat them as indicative engineering values, not certified catalogue data.

License & attribution

Released under Creative Commons Attribution 4.0 (CC BY 4.0). You may copy, redistribute and adapt the data for any purpose, including commercial use, provided you attribute it, for example: “Data: MPN Base (mpnbase.com), CC BY 4.0”. Brand names and model designations in the dataset remain trademarks of their respective owners and are included for identification only.

Citing a record

Always verify load-critical values against the current manufacturer catalogue before ordering or installing a component — see our editorial & correction policy for how records are sourced, verified and corrected.