6003 Bearing Dimensions and Cross Reference
6003 = 17 mm bore, 35 mm OD, 10 mm width; deep groove ball bearing, ISO 15.
Verified dimensions
| Bore (d) | 17 mm |
|---|---|
| Outer Diameter (D) | 35 mm |
| Width (B) | 10 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 | 6003 | 2RSH | 2Z | match | SKF catalog ↗ |
| NSK | 6003 | DDU | ZZ | match | NSK catalog ↗ |
| FAG | 6003 | 2RSR | 2ZR | match | FAG catalog ↗ |
| NTN | 6003 | LLU | ZZ | match | NTN catalog ↗ |
| KOYO | 6003 | 2RS | ZZ | match | KOYO catalog ↗ |
| NACHI | 6003 | 2NSE | ZE | match | NACHI catalog ↗ |
| Timken | 6003 | 2RS | ZZ | match | Timken catalog ↗ |
| INA | 6003 | 2RSR | 2ZR | match | INA catalog ↗ |
Interchange notes
For 6003, verify the complete 17×35×10 mm boundary dimensions. A 17 mm bore match does not establish interchangeability unless the 35 mm OD and 10 mm width also match.
For 6003, contact-seal suffixes in the linked catalog set are SKF 2RSH, NSK DDU, FAG/INA 2RSR, NTN LLU, KOYO/Timken 2RS and NACHI 2NSE. Shield suffixes are brand-specific: 2Z, ZZ, 2ZR or ZE.
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
What are d, D and B for a 6003 bearing?
For 6003, d is the 17 mm bore, D is the 35 mm outside diameter and B is the 10 mm width.
What is the difference between 6003-2RSH and 6003-DDU?
2RSH is the SKF contact-seal code and DDU is the NSK contact-seal code shown by the linked catalogs. Confirm details against the exact manufacturer entry rather than treating suffix text as universal.
Does any 17 mm bore bearing replace a 6003?
No. A dimensional candidate must also match the 35 mm OD and 10 mm width, followed by the specified variant and manufacturer-specific checks.
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.