NTN 7303 Bearing — Specifications, Dimensions & Cross-Reference
The NTN 7303 is a angular contact ball bearing manufactured by NTN. It belongs to the 7300 series and features dimensions of 17 × 47 × 14 mm (bore × OD × width). This bearing has a dynamic load rating of 13,500 N and a static load rating of 6,550 N, making it suitable for medium-duty applications.
Technical Specifications
| Dimensions | |
|---|---|
| Bore Diameter (d) | 17 mm |
| Outside Diameter (D) | 47 mm |
| Width (B) | 14 mm |
| Weight | 0.107 kg |
| Performance | |
|---|---|
| Dynamic Load Rating (Cr) | 13,500 N |
| Static Load Rating (C₀r) | 6,550 N |
| Limiting Speed (Grease) | 15,000 rpm |
| Limiting Speed (Oil) | 18,000 rpm |
Brand Cross-Reference — 7303 Equivalents
The following bearings from other manufacturers are interchangeable with the NTN 7303. All share identical dimensions (17×47×14mm) and comparable load ratings:
| Brand | Part Number | Dynamic Load (N) | Static Load (N) |
|---|---|---|---|
| NTN | NTN 7303 ✦ | 13,500 | 6,550 |
| SKF | SKF 7303 | 13,500 | 6,550 |
| NTN | NTN 7303 | 13,500 | 6,550 |
| KOYO | KOYO 7303 | 13,500 | 6,550 |
| FAG | FAG 7303 | 13,500 | 6,550 |
| NACHI | NACHI 7303 | 13,500 | 6,550 |
| Timken | Timken 7303 | 13,500 | 6,550 |
| NSK | NSK 7303 | 13,500 | 6,550 |
| SKF | SKF 7303 | 13,500 | 6,550 |
Available Variants
The NTN 7303 base bearing is available in these configurations:
Frequently Asked Questions
What are the dimensions of the NTN 7303?
The NTN 7303 has a bore diameter of 17mm, outside diameter of 47mm, and width of 14mm. It weighs 0.107kg.
What is the load capacity of the NTN 7303?
The dynamic load rating (Cr) is 13,500 N and the static load rating (C₀r) is 6,550 N. The maximum recommended speed is 15,000 rpm with grease lubrication or 18,000 rpm with oil lubrication.
What bearings are equivalent to NTN 7303?
The 7303 is manufactured by multiple brands including SKF, NTN, NSK, FAG, Timken, KOYO, and NACHI. All versions share the same 17×47×14mm dimensions and are interchangeable in most applications. See the cross-reference table above for detailed comparisons.