NTN 6307-NR Bearing — Specifications, Dimensions & Cross-Reference
The NTN 6307-NR is a deep groove ball bearing with snap ring groove manufactured by NTN. It belongs to the 6300 series and features dimensions of 35 × 80 × 21 mm (bore × OD × width). This bearing has a dynamic load rating of 33,200 N and a static load rating of 19,000 N, making it suitable for heavy-duty applications.
Technical Specifications
| Dimensions | |
|---|---|
| Bore Diameter (d) | 35 mm |
| Outside Diameter (D) | 80 mm |
| Width (B) | 21 mm |
| Weight | 0.413 kg |
| Performance | |
|---|---|
| Dynamic Load Rating (Cr) | 33,200 N |
| Static Load Rating (C₀r) | 19,000 N |
| Limiting Speed (Grease) | 8,500 rpm |
| Limiting Speed (Oil) | 10,000 rpm |
Brand Cross-Reference — 6307-NR Equivalents
The following bearings from other manufacturers are interchangeable with the NTN 6307-NR. All share identical dimensions (35×80×21mm) and comparable load ratings:
| Brand | Part Number | Dynamic Load (N) | Static Load (N) |
|---|---|---|---|
| NTN | NTN 6307-NR ✦ | 33,200 | 19,000 |
| Timken | Timken 6307-NR | 33,200 | 19,000 |
| SKF | SKF 6307-NR | 33,200 | 19,000 |
| NACHI | NACHI 6307-NR | 33,200 | 19,000 |
| KOYO | KOYO 6307-NR | 33,200 | 19,000 |
| FAG | FAG 6307-NR | 33,200 | 19,000 |
| Timken | Timken 6307-NR | 33,200 | 19,000 |
| NSK | NSK 6307-NR | 33,200 | 19,000 |
| NTN | NTN 6307-NR | 33,200 | 19,000 |
| SKF | SKF 6307-NR | 33,200 | 19,000 |
Available Variants
The NTN 6307 base bearing is available in these configurations:
Frequently Asked Questions
What are the dimensions of the NTN 6307-NR?
The NTN 6307-NR has a bore diameter of 35mm, outside diameter of 80mm, and width of 21mm. It weighs 0.413kg.
What is the load capacity of the NTN 6307-NR?
The dynamic load rating (Cr) is 33,200 N and the static load rating (C₀r) is 19,000 N. The maximum recommended speed is 8,500 rpm with grease lubrication or 10,000 rpm with oil lubrication.
What bearings are equivalent to NTN 6307-NR?
The 6307-NR is manufactured by multiple brands including SKF, NTN, NSK, FAG, Timken, KOYO, and NACHI. All versions share the same 35×80×21mm dimensions and are interchangeable in most applications. See the cross-reference table above for detailed comparisons.