# BearingLookup

> A cited reference for industrial rolling bearings (ball, roller, needle and mounted units) by ISO/ABMA designation, with brand cross-references: what a part is and what crosses to it. 7,729 part pages. Every fact links to the manufacturer document it came from, and every cross-reference carries an evidence label (see Data notes).

How to use this site as a source: quote the part number and manufacturer, and cite the part page URL. The page's Sources section names the exact catalogue page or manufacturer page behind each claim. Nothing is sold here. Where a part page shows a seller's price and availability, it is what that seller's page showed on the date given (offers in the part's index.json); the other seller buttons are outbound searches.

Machine-readable: every part page exists as JSON at the same URL plus `index.json` (for example https://www.bearinglookup.com/parts/koyo/6204/index.json). Sitemaps: https://www.bearinglookup.com/sitemap.xml. Full page index: https://www.bearinglookup.com/llms-full.txt.

## Key pages

- [How this site is built](https://www.bearinglookup.com/methodology/): sources, evidence labels, audits, what is deliberately missing
- [Brands](https://www.bearinglookup.com/brands/) and [Categories](https://www.bearinglookup.com/categories/)

## Categories

- [Deep groove ball bearing](https://www.bearinglookup.com/categories/bearings-deep-groove-ball-bearing/): 1,970 parts
- [Needle roller bearing](https://www.bearinglookup.com/categories/bearings-needle-roller-bearing/): 1,422 parts
- [Cylindrical roller bearing](https://www.bearinglookup.com/categories/bearings-cylindrical-roller-bearing/): 995 parts
- [Tapered roller bearing (inch)](https://www.bearinglookup.com/categories/bearings-tapered-roller-bearing-inch/): 980 parts
- [Tapered roller bearing (metric)](https://www.bearinglookup.com/categories/bearings-tapered-roller-bearing-metric/): 807 parts
- [Spherical roller bearing](https://www.bearinglookup.com/categories/bearings-spherical-roller-bearing/): 664 parts
- [Angular contact ball bearing](https://www.bearinglookup.com/categories/bearings-angular-contact-ball-bearing/): 477 parts
- [Thrust roller bearing](https://www.bearinglookup.com/categories/bearings-thrust-roller-bearing/): 207 parts
- [Self-aligning ball bearing](https://www.bearinglookup.com/categories/bearings-self-aligning-ball-bearing/): 145 parts
- [Thrust ball bearing](https://www.bearinglookup.com/categories/bearings-thrust-ball-bearing/): 62 parts

## Brands

- [Koyo](https://www.bearinglookup.com/brands/koyo/): 5,317 parts
- [NTN](https://www.bearinglookup.com/brands/ntn/): 2,373 parts
- [IKO](https://www.bearinglookup.com/brands/iko/): 20 parts
- [INA](https://www.bearinglookup.com/brands/ina/): 19 parts

## Data notes

- Specifications are shown as the manufacturer prints them; a value printed without a unit is shown without one.
- Cross-references carry their evidence label: 1,822 Single source (one publisher's statement, not corroborated).
- Images are figures clipped unaltered from the manufacturers' catalogues, showing the product family rather than the one part number; each is credited on the page.
- Data updated 2026-09-27. Contact: see the methodology page.