NTN 6312 Bearing — Specifications, Dimensions & Cross-Reference
The NTN 6312 is a deep groove ball bearing manufactured by NTN. It belongs to the 6300 series and features dimensions of 60 × 130 × 31 mm (bore × OD × width). This bearing has a dynamic load rating of 81,900 N and a static load rating of 52,000 N, making it suitable for heavy-duty applications.
Technical Specifications
| Dimensions | |
|---|---|
| Bore Diameter (d) | 60 mm |
| Outside Diameter (D) | 130 mm |
| Width (B) | 31 mm |
| Weight | 1.700 kg |
| Performance | |
|---|---|
| Dynamic Load Rating (Cr) | 81,900 N |
| Static Load Rating (C₀r) | 52,000 N |
| Limiting Speed (Grease) | 5,000 rpm |
| Limiting Speed (Oil) | 6,000 rpm |
Brand Cross-Reference — 6312 Equivalents
The following bearings from other manufacturers are interchangeable with the NTN 6312. All share identical dimensions (60×130×31mm) and comparable load ratings:
| Brand | Part Number | Dynamic Load (N) | Static Load (N) |
|---|---|---|---|
| NTN | NTN 6312 ✦ | 81,900 | 52,000 |
| Timken | Timken 6312 | 81,900 | 52,000 |
| SKF | SKF 6312 | 81,900 | 52,000 |
| NACHI | NACHI 6312 | 81,900 | 52,000 |
| KOYO | KOYO 6312 | 81,900 | 52,000 |
| FAG | FAG 6312 | 81,900 | 52,000 |
| Timken | Timken 6312 | 81,900 | 52,000 |
| NSK | NSK 6312 | 81,900 | 52,000 |
| NTN | NTN 6312 | 81,900 | 52,000 |
| SKF | SKF 6312 | 81,900 | 52,000 |
Available Variants
The NTN 6312 base bearing is available in these configurations:
Frequently Asked Questions
What are the dimensions of the NTN 6312?
The NTN 6312 has a bore diameter of 60mm, outside diameter of 130mm, and width of 31mm. It weighs 1.700kg.
What is the load capacity of the NTN 6312?
The dynamic load rating (Cr) is 81,900 N and the static load rating (C₀r) is 52,000 N. The maximum recommended speed is 5,000 rpm with grease lubrication or 6,000 rpm with oil lubrication.
What bearings are equivalent to NTN 6312?
The 6312 is manufactured by multiple brands including SKF, NTN, NSK, FAG, Timken, KOYO, and NACHI. All versions share the same 60×130×31mm dimensions and are interchangeable in most applications. See the cross-reference table above for detailed comparisons.