KOYO 6904-C3 Bearing — Specifications, Dimensions & Cross-Reference
The KOYO 6904-C3 is a deep groove ball bearing with C3 clearance manufactured by KOYO. It belongs to the 6900 series and features dimensions of 20 × 37 × 9 mm (bore × OD × width). This bearing has a dynamic load rating of 5,850 N and a static load rating of 3,250 N, making it suitable for light-duty applications.
Technical Specifications
| Dimensions | |
|---|---|
| Bore Diameter (d) | 20 mm |
| Outside Diameter (D) | 37 mm |
| Width (B) | 9 mm |
| Weight | 0.030 kg |
| Performance | |
|---|---|
| Dynamic Load Rating (Cr) | 5,850 N |
| Static Load Rating (C₀r) | 3,250 N |
| Limiting Speed (Grease) | 17,000 rpm |
| Limiting Speed (Oil) | 24,000 rpm |
Brand Cross-Reference — 6904-C3 Equivalents
The following bearings from other manufacturers are interchangeable with the KOYO 6904-C3. All share identical dimensions (20×37×9mm) and comparable load ratings:
| Brand | Part Number | Dynamic Load (N) | Static Load (N) |
|---|---|---|---|
| KOYO | KOYO 6904-C3 ✦ | 5,850 | 3,250 |
| NTN | NTN 6904-C3 | 5,850 | 3,250 |
| NACHI | NACHI 6904-C3 | 5,850 | 3,250 |
| FAG | FAG 6904-C3 | 5,850 | 3,250 |
| Timken | Timken 6904-C3 | 5,850 | 3,250 |
| NSK | NSK 6904-C3 | 5,850 | 3,250 |
| NTN | NTN 6904-C3 | 5,850 | 3,250 |
| SKF | SKF 6904-C3 | 5,850 | 3,250 |
Available Variants
The KOYO 6904 base bearing is available in these configurations:
Frequently Asked Questions
What are the dimensions of the KOYO 6904-C3?
The KOYO 6904-C3 has a bore diameter of 20mm, outside diameter of 37mm, and width of 9mm. It weighs 0.030kg.
What is the load capacity of the KOYO 6904-C3?
The dynamic load rating (Cr) is 5,850 N and the static load rating (C₀r) is 3,250 N. The maximum recommended speed is 17,000 rpm with grease lubrication or 24,000 rpm with oil lubrication.
What bearings are equivalent to KOYO 6904-C3?
The 6904-C3 is manufactured by multiple brands including SKF, NTN, NSK, FAG, Timken, KOYO, and NACHI. All versions share the same 20×37×9mm dimensions and are interchangeable in most applications. See the cross-reference table above for detailed comparisons.