NTN 7307 Bearing — Specifications, Dimensions & Cross-Reference
The NTN 7307 is a angular contact ball bearing manufactured by NTN. It belongs to the 7300 series and features dimensions of 35 × 80 × 21 mm (bore × OD × width). This bearing has a dynamic load rating of 35,800 N and a static load rating of 20,800 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) | 35,800 N |
| Static Load Rating (C₀r) | 20,800 N |
| Limiting Speed (Grease) | 8,000 rpm |
| Limiting Speed (Oil) | 10,000 rpm |
Brand Cross-Reference — 7307 Equivalents
The following bearings from other manufacturers are interchangeable with the NTN 7307. All share identical dimensions (35×80×21mm) and comparable load ratings:
| Brand | Part Number | Dynamic Load (N) | Static Load (N) |
|---|---|---|---|
| NTN | NTN 7307 ✦ | 35,800 | 20,800 |
| SKF | SKF 7307 | 35,800 | 20,800 |
| NTN | NTN 7307 | 35,800 | 20,800 |
| KOYO | KOYO 7307 | 35,800 | 20,800 |
| FAG | FAG 7307 | 35,800 | 20,800 |
| NACHI | NACHI 7307 | 35,800 | 20,800 |
| Timken | Timken 7307 | 35,800 | 20,800 |
| NSK | NSK 7307 | 35,800 | 20,800 |
| SKF | SKF 7307 | 35,800 | 20,800 |
Available Variants
The NTN 7307 base bearing is available in these configurations:
Frequently Asked Questions
What are the dimensions of the NTN 7307?
The NTN 7307 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 7307?
The dynamic load rating (Cr) is 35,800 N and the static load rating (C₀r) is 20,800 N. The maximum recommended speed is 8,000 rpm with grease lubrication or 10,000 rpm with oil lubrication.
What bearings are equivalent to NTN 7307?
The 7307 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.