NU309ECMA/C3
Medium cross-section cylindrical roller bearings (NU-type) with higher load capacity than NU200 for the same bore size. Free axial float in both directions. Used where heavier radial loads require a more robust bearing.
FAGNU309-E-TVP2-C3
Pricing not yet available for this part.
Geometry100%
45 × 100 × 25mm
Sealing100%
Open (no seal)
Load rating100%
Cr 74 kN / C₀r 71 kN
Speed100%
5,300 rpm (grease)
Specifications
| Bore diameter (d) | 45 mm |
| Outer diameter (D) | 100 mm |
| Width (B) | 25 mm |
| Dynamic load rating (C) | 74 kN |
| Static load rating (C₀) | 71 kN |
| Weight | 856 g |
| Max speed (grease) | 5,300 rpm |
| Max speed (oil) | — |
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 |
|---|---|---|---|---|
| FAG | NU309-E-TVP2-C3 | Open | C3 | Probable |
| NSK | NU309W C3 | Open | C3 | Probable |
| NTN | NU309ET2 C3 | Open | C3 | Probable |
| SKF | NU 309 ECP/C3 | Open | C3 | Probable |
| Timken | NU309EM/C3 | Open | C3 | Probable |
Internal Clearance
Greater Than Normal (C3)
Increased radial internal clearance. Required when bearings operate at elevated temperatures or with tight shaft fits.
Best forHigh-temperature applications. Tight interference fits. Electric motors with frequent starts/stops.
Temperature70-150°C operating temperature
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
Where This Bearing Is Used
Large electric motorsHeavy-duty pumpsIndustrial gearboxesCompressorsCrushers and screensMill equipmentLarge fan assembliesIndustrial electric motors (10-50 HP)Gearboxes and speed reducersConveyor systemsMachine tool spindlesAutomotive wheel hubsCentrifugal fans
Heavy industryMiningPower generationCement