6204-2RS-C3 is a compact example because it combines a base designation, a seal suffix, and a clearance suffix. Enter the complete string in the Bearing Number Decoder rather than decoding 6204, 2RS, or C3 in isolation.
Segment breakdown
| Segment | Decoder reading | Boundary |
|---|---|---|
| 6204 | Deep-groove ball bearing, 62 series, 20 mm bore. | The base designation does not by itself certify full dimensions or load rating. |
| 2RS | Two rubber seals. | Seal construction and material are maker-specific. |
| C3 | Greater-than-normal internal clearance. | Exact clearance range depends on bearing size, standard, and manufacturer data. |
Bore code 04
The last two digits in the base number are 04. For common metric bearing designations, bore codes 04 through 96 commonly multiply by five, so 04 indicates a 20 mm bore. That does not mean every 04 bearing has the same outside diameter or width.
Why the suffix order matters
The suffixes describe different things. 2RS is about sealing. C3 is about internal clearance. The decoder returns separate rows so that a maintenance note does not accidentally treat C3 as a seal code or 2RS as a clearance code.
What to verify
Before using 6204-2RS-C3 as a replacement, verify the exact manufacturer catalog entry, bearing dimensions, material and cage details, lubricant, operating temperature, load requirements, fit, and clearance requirement. The parser output is a readable designation summary, not an approval to interchange parts.
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 | Bearing Seal, Shield, and Clearance Suffixes | 6205-ZZ vs 6203-2Z Bearing Number