NTN 6307 Bearing — Specifications, Dimensions & Cross-Reference
The NTN 6307 is a deep groove ball bearing 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 Equivalents
The following bearings from other manufacturers are interchangeable with the NTN 6307. All share identical dimensions (35×80×21mm) and comparable load ratings:
| Brand | Part Number | Dynamic Load (N) | Static Load (N) |
|---|---|---|---|
| NTN | NTN 6307 ✦ | 33,200 | 19,000 |
| Timken | Timken 6307 | 33,200 | 19,000 |
| SKF | SKF 6307 | 33,200 | 19,000 |
| NACHI | NACHI 6307 | 33,200 | 19,000 |
| KOYO | KOYO 6307 | 33,200 | 19,000 |
| FAG | FAG 6307 | 33,200 | 19,000 |
| Timken | Timken 6307 | 33,200 | 19,000 |
| NSK | NSK 6307 | 33,200 | 19,000 |
| NTN | NTN 6307 | 33,200 | 19,000 |
| SKF | SKF 6307 | 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?
The NTN 6307 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?
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?
The 6307 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.