30205 and 22212 are both numeric bearing designations, but the leading series changes the bearing family. The Bearing Number Decoder reads 302 as a tapered roller pattern and 222 as a spherical roller pattern.
Comparison table
| Input | Family reading | Bore reading | Important limit |
|---|---|---|---|
| 30205 | Metric tapered roller bearing, 302 series. | 05 means 25 mm bore. | Tapered roller designations have their own standards and catalog details. |
| 22212 | Spherical roller bearing, 222 series. | 12 means 60 mm bore. | Spherical roller geometry and suffixes require catalog data. |
Do not compare by bore alone
A 25 mm bore tapered roller bearing and a 60 mm bore spherical roller bearing solve very different mechanical jobs. Even two bearings with the same bore can differ by family, width, outside diameter, load path, internal geometry, and suffix details.
Tapered roller caution
Metric tapered roller bearing designations have ISO context, while inch-design tapered roller bearings often follow ANSI/ABMA part-number conventions. The parser can identify common metric-looking series such as 302, 322, and 323, but it does not turn every tapered roller number into a complete assembly or interchange record.
Spherical roller caution
For 22212, the decoder can expose the 222 family and 60 mm bore. It cannot decide cage, clearance, lubrication, mounting method, bearing internal design, or application suitability. Those details live in the maker catalog.
Source and limits
Sources: open-source bearing CSV tables from gumyr/cq_warehouse (Apache-2.0), plus NSK bearing designation guidance, JTEKT/Koyo bearing number tables, SKF designation guidance, ISO rolling bearing references including ISO 5753-1 for radial internal clearance, and ANSI/ABMA tapered roller bearing references; verified 2026-08-30.
- This content explains the imported bearing database first, then the parser fallback for supported patterns that are not in the exact table.
- Exact database rows preserve the imported dimensions and suffix notes, but they still do not replace the maker catalog for procurement, maintenance, or safety decisions.
- Bore code parsing does not decide outside diameter, width, cage material, lubrication, fit, load rating, or interchangeability.
- Metric tapered roller and inch-design tapered roller bearings use separate designation systems, so verify the exact catalog entry before purchase or maintenance work.
Related bearing guides
Bearing Bore Code and Dimensions | NU205ECP Bearing Number | Bearing Number Reference Set Limits