6204 Bearing Dimensions and Cross Reference
6204 = 20 mm bore, 47 mm OD, 14 mm width; deep groove ball bearing, ISO 15.
Verified dimensions
| Bore (d) | 20 mm |
|---|---|
| Outer Diameter (D) | 47 mm |
| Width (B) | 14 mm |
| Type | Deep Groove Ball Bearing |
| Standard | ISO 15 |
In the diagram and table, d is bore diameter, D is outside diameter and B is width.
Sources and evidence
Boundary dimensions are traced to the cited standard. Brand designations and suffixes are checked against the official catalog entry linked for each manufacturer.
Cross-Reference by Brand
| Brand | Part No. | Contact seal | Shield | Boundary dims | Catalog |
|---|---|---|---|---|---|
| SKF | 6204 | 2RSH | 2Z | match | SKF catalog ↗ |
| NSK | 6204 | DDU | ZZ | match | NSK catalog ↗ |
| FAG | 6204 | 2RSR | 2ZR | match | FAG catalog ↗ |
| NTN | 6204 | LLU | ZZ | match | NTN catalog ↗ |
| KOYO | 6204 | 2RS | ZZ | match | KOYO catalog ↗ |
| NACHI | 6204 | 2NSE | ZE | match | NACHI catalog ↗ |
| Timken | 6204 | 2RS | ZZ | match | Timken catalog ↗ |
| INA | 6204 | 2RSR | 2ZR | match | INA catalog ↗ |
Interchange notes
Treat 20 mm as only the bore check for 6204. A dimensionally matching candidate must also retain the 47 mm outside diameter and 14 mm width before any manufacturer-specific fields are evaluated.
For 6204, verified contact-seal codes include SKF 2RSH, NSK DDU, FAG/INA 2RSR, NTN LLU, KOYO/Timken 2RS and NACHI 2NSE. The corresponding shield codes shown in the catalogs are 2Z, ZZ, 2ZR or ZE depending on brand.
Manufacturer checks before substitution
Confirm load rating, speed limit, internal clearance, precision class, lubrication and application suitability in the official manufacturer catalog for the exact brand and suffix. This page does not supply those values or make an application recommendation. Review the interchange rules before selecting a substitute.
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FAQ
Is a 6204 bearing 20×47×14 mm?
Yes. For the ISO 15 boundary dimensions, d = 20 mm, D = 47 mm and B = 14 mm.
Do 6204-2RSH, 6204-DDU and 6204-LLU mean the same suffix?
They are brand-specific contact-seal designations listed for SKF, NSK and NTN. They identify comparable sealing categories, but the exact construction must be checked in each linked manufacturer catalog.
Is matching the 20 mm bore enough to substitute a 6204?
No. The candidate must first match all three boundary dimensions: 20 mm bore, 47 mm OD and 14 mm width. Then confirm the remaining manufacturer-specific fields.
Related sizes
Boundary-dimension cross-reference only. Per the applicable ISO standard (ISO 15 for ball, ISO 355 for tapered), the boundary dimensions are common across brands, so the mounting envelope is interchangeable. This is NOT a drop-in part equivalence. Internal clearance, precision class, seal/shield type (where applicable), cage material and factory lubrication are encoded in brand-specific suffixes and must be matched separately. Always verify against the manufacturer's catalog before substituting.