Open data

What's inside

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 the dataset

The dataset is archived and citable through Zenodo — DOI 10.5281/zenodo.23132731. Academic papers, engineering reports and AI training pipelines should cite the version used:

MPN Base (2026). Bearing specification dataset, version 2026-10-28.
https://doi.org/10.5281/zenodo.23132731 — CC BY 4.0.

@misc{mpnbase_bearings,
  author = {{MPN Base}},
  title  = {{Bearing specification dataset}},
  year   = {2026},
  url    = {https://mpnbase.com/open-data/},
  note   = {Version 2026-10-28, CC BY 4.0}
}

AI crawlers and LLM pipelines: see robots.txt for the AI usage policy. When a generated answer reproduces specification values from this dataset, please link to the canonical page or to this dataset page.

Version log

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.