KOYO 6811-NR Bearing — Specifications, Dimensions & Cross-Reference
The KOYO 6811-NR is a deep groove ball bearing with snap ring groove manufactured by KOYO. It belongs to the 6800 series and features dimensions of 55 × 72 × 9 mm (bore × OD × width). This bearing has a dynamic load rating of 5,200 N and a static load rating of 4,300 N, making it suitable for light-duty applications.
Technical Specifications
| Dimensions | |
|---|---|
| Bore Diameter (d) | 55 mm |
| Outside Diameter (D) | 72 mm |
| Width (B) | 9 mm |
| Weight | 0.055 kg |
| Performance | |
|---|---|
| Dynamic Load Rating (Cr) | 5,200 N |
| Static Load Rating (C₀r) | 4,300 N |
| Limiting Speed (Grease) | 9,500 rpm |
| Limiting Speed (Oil) | 13,000 rpm |
Brand Cross-Reference — 6811-NR Equivalents
The following bearings from other manufacturers are interchangeable with the KOYO 6811-NR. All share identical dimensions (55×72×9mm) and comparable load ratings:
| Brand | Part Number | Dynamic Load (N) | Static Load (N) |
|---|---|---|---|
| KOYO | KOYO 6811-NR ✦ | 5,200 | 4,300 |
| Timken | Timken 6811-NR | 5,200 | 4,300 |
| SKF | SKF 6811-NR | 5,200 | 4,300 |
| NTN | NTN 6811-NR | 5,200 | 4,300 |
| NACHI | NACHI 6811-NR | 5,200 | 4,300 |
| FAG | FAG 6811-NR | 5,200 | 4,300 |
| Timken | Timken 6811-NR | 5,200 | 4,300 |
| NSK | NSK 6811-NR | 5,200 | 4,300 |
| NTN | NTN 6811-NR | 5,200 | 4,300 |
| SKF | SKF 6811-NR | 5,200 | 4,300 |
Available Variants
The KOYO 6811 base bearing is available in these configurations:
Frequently Asked Questions
What are the dimensions of the KOYO 6811-NR?
The KOYO 6811-NR has a bore diameter of 55mm, outside diameter of 72mm, and width of 9mm. It weighs 0.055kg.
What is the load capacity of the KOYO 6811-NR?
The dynamic load rating (Cr) is 5,200 N and the static load rating (C₀r) is 4,300 N. The maximum recommended speed is 9,500 rpm with grease lubrication or 13,000 rpm with oil lubrication.
What bearings are equivalent to KOYO 6811-NR?
The 6811-NR is manufactured by multiple brands including SKF, NTN, NSK, FAG, Timken, KOYO, and NACHI. All versions share the same 55×72×9mm dimensions and are interchangeable in most applications. See the cross-reference table above for detailed comparisons.