NTN 6306-ZZ-C3 Bearing — Specifications, Dimensions & Cross-Reference
The NTN 6306-ZZ-C3 is a deep groove ball bearing double metal shielded manufactured by NTN. It belongs to the 6300 series and features dimensions of 30 × 72 × 19 mm (bore × OD × width). This bearing has a dynamic load rating of 28,100 N and a static load rating of 16,000 N, making it suitable for heavy-duty applications.
Technical Specifications
| Dimensions | |
|---|---|
| Bore Diameter (d) | 30 mm |
| Outside Diameter (D) | 72 mm |
| Width (B) | 19 mm |
| Weight | 0.327 kg |
| Performance | |
|---|---|
| Dynamic Load Rating (Cr) | 28,100 N |
| Static Load Rating (C₀r) | 16,000 N |
| Limiting Speed (Grease) | 9,000 rpm |
| Limiting Speed (Oil) | 11,000 rpm |
Brand Cross-Reference — 6306-ZZ-C3 Equivalents
The following bearings from other manufacturers are interchangeable with the NTN 6306-ZZ-C3. All share identical dimensions (30×72×19mm) and comparable load ratings:
| Brand | Part Number | Dynamic Load (N) | Static Load (N) |
|---|---|---|---|
| NTN | NTN 6306-ZZ-C3 ✦ | 28,100 | 16,000 |
| Timken | Timken 6306-ZZ-C3 | 28,100 | 16,000 |
| SKF | SKF 6306-ZZ-C3 | 28,100 | 16,000 |
| NTN | NTN 6306-ZZ-C3 | 28,100 | 16,000 |
| NACHI | NACHI 6306-ZZ-C3 | 28,100 | 16,000 |
| KOYO | KOYO 6306-ZZ-C3 | 28,100 | 16,000 |
| FAG | FAG 6306-ZZ-C3 | 28,100 | 16,000 |
| Timken | Timken 6306-ZZ-C3 | 28,100 | 16,000 |
| NSK | NSK 6306-ZZ-C3 | 28,100 | 16,000 |
| SKF | SKF 6306-ZZ-C3 | 28,100 | 16,000 |
Available Variants
The NTN 6306 base bearing is available in these configurations:
Frequently Asked Questions
What are the dimensions of the NTN 6306-ZZ-C3?
The NTN 6306-ZZ-C3 has a bore diameter of 30mm, outside diameter of 72mm, and width of 19mm. It weighs 0.327kg.
What is the load capacity of the NTN 6306-ZZ-C3?
The dynamic load rating (Cr) is 28,100 N and the static load rating (C₀r) is 16,000 N. The maximum recommended speed is 9,000 rpm with grease lubrication or 11,000 rpm with oil lubrication.
What bearings are equivalent to NTN 6306-ZZ-C3?
The 6306-ZZ-C3 is manufactured by multiple brands including SKF, NTN, NSK, FAG, Timken, KOYO, and NACHI. All versions share the same 30×72×19mm dimensions and are interchangeable in most applications. See the cross-reference table above for detailed comparisons.