6312
Higher load capacity than the 6200 series for the same bore size. Used where heavier radial loads are expected.
NSK631260 × 130 × 31mm
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$65.94
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Specifications
| Bore diameter (d) | 60 mm |
| Outer diameter (D) | 130 mm |
| Width (B) | 31 mm |
| Dynamic load rating (C) | 85.2 kN |
| Static load rating (C₀) | 52 kN |
| Weight | 1240 g |
| Max speed (grease) | 7,000 rpm |
| Max speed (oil) | 11,000 rpm |
Why This Match Is Correct
✓Exact dimensional match (bore, OD, width)
✓Load ratings within tolerance
✓Seal type verified via manufacturer tables
✓Speed rating compatible
Equivalents Across Brands
| Brand | Part Number | Seal | Clearance | Status |
|---|---|---|---|---|
| NSK | 6312 | Open | CN | Current |
| SKF | 6312 | Open | CN | Current |
| FAG | 6312 | Open | CN | Current |
| NTN | 6312 | Open | CN | Current |
| Timken | 6312 | Open | CN | Current |
Seal Type
Open (No Seal)
No seals or shields. Allows external lubrication and cooling. Lowest friction, highest speed capability.
Best forClean environments with external lubrication systems. High-speed applications where heat dissipation matters.
Avoid forDirty, dusty, or wet environments. Applications without planned lubrication maintenance.
Examples
- Machine tool spindles
- Gearboxes with oil bath lubrication
- High-speed precision equipment
Internal Clearance
Normal Clearance (CN)
Standard radial internal clearance. Suitable for most applications under normal operating conditions.
Best forGeneral-purpose use. Normal temperatures, standard fits, moderate speeds.
TemperatureUp to ~70°C operating temperature
Where This Bearing Is Used
Medium Series — Common Applications
- Heavy-duty electric motors
- Industrial pumps
- Conveyor systems
- Mining equipment
- Construction machinery
- Agricultural equipment
- Heavy gearboxes
- Compressors
- Paper and steel mills
- Vibrating screens
Heavy industryMiningConstructionPaper & pulpSteel
Large (60mm bore) — Typical Uses
- Large electric motors (50+ HP)
- Industrial gearboxes
- Heavy-duty conveyor systems
- Mining and construction equipment
- Paper mill machinery
- Steel rolling mills
- Large compressors
- Wind turbine components
Other Variants Available
Same bearing geometry — different seal and clearance configurations.
| SKF Part Number | Seal Type | Clearance |
|---|---|---|
| 6312 C3 | Open (No Seal) | C3 |
| 6312-2Z | ZZ | CN |
| 6312-2Z C3 | ZZ | C3 |
| 6312-2RS1 | 2RS | CN |
| 6312-2RS1 C3 | 2RS | C3 |