NACHI 6303 Bearing — Specifications, Dimensions & Cross-Reference
The NACHI 6303 is a deep groove ball bearing manufactured by NACHI. It belongs to the 6300 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) | 16,000 rpm |
| Limiting Speed (Oil) | 19,000 rpm |
Brand Cross-Reference — 6303 Equivalents
The following bearings from other manufacturers are interchangeable with the NACHI 6303. All share identical dimensions (17×47×14mm) and comparable load ratings:
| Brand | Part Number | Dynamic Load (N) | Static Load (N) |
|---|---|---|---|
| NACHI | NACHI 6303 ✦ | 13,500 | 6,550 |
| Timken | Timken 6303 | 13,500 | 6,550 |
| SKF | SKF 6303 | 13,500 | 6,550 |
| NTN | NTN 6303 | 13,500 | 6,550 |
| KOYO | KOYO 6303 | 13,500 | 6,550 |
| FAG | FAG 6303 | 13,500 | 6,550 |
| Timken | Timken 6303 | 13,500 | 6,550 |
| NTN | NTN 6303 | 13,500 | 6,550 |
| NSK | NSK 6303 | 13,500 | 6,550 |
| SKF | SKF 6303 | 13,500 | 6,550 |
Available Variants
The NACHI 6303 base bearing is available in these configurations:
Frequently Asked Questions
What are the dimensions of the NACHI 6303?
The NACHI 6303 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 NACHI 6303?
The dynamic load rating (Cr) is 13,500 N and the static load rating (C₀r) is 6,550 N. The maximum recommended speed is 16,000 rpm with grease lubrication or 19,000 rpm with oil lubrication.
What bearings are equivalent to NACHI 6303?
The 6303 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.