6304-2RS Deep Groove Ball Bearing (20x52x15mm)
How to read this designation →
Bearing dimensions and basic technical information.
Schematic only — for the actual construction, refer to each manufacturer's information.
Base model: 6304
Related designations: SKF 6304-2RSH · NSK 6304DDU · Schaeffler (FAG) 6304-2RSR · NTN 6304LLU · Timken 6304-2RS
Suffix Information
Manufacturer Ratings
Load-rating symbols are printed as each manufacturer writes them in its own catalogue, so the same quantity can carry a different symbol from brand to brand.
| Brand | Dynamic Load Rating | Static Load Rating | Fatigue Load Limit |
|---|---|---|---|
| SKF 6304-2RSH | 16.8 kN | 7.8 kN | 0.335 kN |
| NSK 6304DDU | 17.5 kN | 7.9 kN | — |
| Schaeffler (FAG) 6304-2RSR | 16.9 kN | 7.9 kN | 0.54 kN |
| NTN 6304LLU | 17.6 kN | 7.9 kN | 0.615 kN |
| Timken 6304-2RS | 15.9 kN | 7.8 kN | — |
Speed Ratings
Speed limits depend on sealing and lubrication, and definitions differ by manufacturer. The figures below are for this sealed version (6304-2RS). Contact seals are greased for life and run slower than the open bearing. Always confirm the exact variant in the manufacturer's table.
| Brand | Grease sealed (2RS) | Oil sealed (2RS) | Reference | Limiting |
|---|---|---|---|---|
| SKF 6304-2RSH | — | — | — | 9,500 r/min |
| NSK 6304DDU | 10,000 r/min | — | — | — |
| Schaeffler (FAG) 6304-2RSR | — | — | — | 8,800 r/min |
| NTN 6304LLU | 10,000 r/min | — | — | — |
| Timken 6304-2RS | — | — | — | — |
Timken does not publish a limiting speed for this sealed variant.
References
- SKF — SKF Group, Rolling Bearings, PUB BU/P1 17000/1 EN, Oct. 2018.
- NSK — NSK Ltd., Rolling Bearings for Industrial Machinery, CAT. No. E1103, Tokyo, Japan, Jan. 2025.
- Schaeffler (FAG) — Schaeffler Technologies AG & Co. KG, Rolling Bearings, HR 1, Herzogenaurach, Germany, Feb. 2025.
- NTN — NTN Corporation, Ball and Roller Bearings, CAT. No. 2203-3E, Osaka, Japan, Sep. 2000.
- Timken — The Timken Company, Deep Groove Ball Bearings, Catalog 10857, North Canton, OH, USA.
Related Guides
Disclaimer: Data on this page is compiled from publicly available online sources for reference only, and not every model appears in a manufacturer's published catalog. Values may differ between sources and editions — always verify against the manufacturer's current documentation before design or purchase.Full disclaimer →