51311
SKF5131155 × 105 × 35mm
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$50.60
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Specifications
| Bore diameter (d) | 55 mm |
| Outer diameter (D) | 105 mm |
| Width (B) | 35 mm |
| Dynamic load rating (C) | 73.5 kN |
| Static load rating (C₀) | 166 kN |
| Weight | 910 g |
| Max speed (grease) | 2,400 rpm |
| Max speed (oil) | 3,200 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 |
|---|---|---|---|---|
| SKF | 51311 | Open | CN | Current |
| FAG | 51311 | Open | CN | Current |
| NSK | 51311 | Open | CN | Current |
| NTN | 51311 | Open | CN | Current |
| Timken | 51311 | 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
Large (55mm 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