NACHI 6811 Bearing — Specifications, Dimensions & Cross-Reference
The NACHI 6811 is a deep groove ball bearing manufactured by NACHI. 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 Equivalents
The following bearings from other manufacturers are interchangeable with the NACHI 6811. All share identical dimensions (55×72×9mm) and comparable load ratings:
| Brand | Part Number | Dynamic Load (N) | Static Load (N) |
|---|---|---|---|
| NACHI | NACHI 6811 ✦ | 5,200 | 4,300 |
| Timken | Timken 6811 | 5,200 | 4,300 |
| SKF | SKF 6811 | 5,200 | 4,300 |
| NTN | NTN 6811 | 5,200 | 4,300 |
| KOYO | KOYO 6811 | 5,200 | 4,300 |
| FAG | FAG 6811 | 5,200 | 4,300 |
| Timken | Timken 6811 | 5,200 | 4,300 |
| NSK | NSK 6811 | 5,200 | 4,300 |
| NTN | NTN 6811 | 5,200 | 4,300 |
| SKF | SKF 6811 | 5,200 | 4,300 |
Available Variants
The NACHI 6811 base bearing is available in these configurations:
Frequently Asked Questions
What are the dimensions of the NACHI 6811?
The NACHI 6811 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 NACHI 6811?
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 NACHI 6811?
The 6811 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.