NU-309-ECP-C3
Geometry100%
45 × 100 × 25mm
Sealing100%
Open (no seal)
Load rating100%
Cr 74 kN / C₀r 71 kN
Speed100%
5,300 rpm (grease)
FAGNU309-E-TVP2-C3
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Match Details
The specifications and details for why this match is correct.
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) | — |
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Why This Match Is Correct
✓Exact dimensional match (bore, OD, width)
✓Load ratings within tolerance
✓Seal type verified via manufacturer tables
✓Speed rating compatible
Cross-References
Every way this part is identified across brands and catalogs.
Tier-1 Brand Equivalents
| 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 |
Legacy & Proprietary Numbers
SKFNU309Verified — Schaeffler Brand Interchange · last checked last month · perfect interchangeNTNNU309High confidence — Schaeffler Brand Interchange · last checked last month · near equivalentSTEYRNU309E/M6/C3Verified — Schaeffler Brand Interchange · last checked last month · perfect interchangeKOYONU309High confidence — Schaeffler Brand Interchange · last checked last month · near equivalentNSKNU309High confidence — Schaeffler Brand Interchange · last checked last month · near equivalentSNRNU309Verified — Schaeffler Brand Interchange · last checked last month · perfect interchangeZKLNU309Verified — Schaeffler Brand Interchange · last checked last month · perfect interchangeSKFNU309ECJVerified — Schaeffler Brand Interchange · last checked last month · perfect interchangeNTNNU309EVerified — Schaeffler Brand Interchange · last checked last month · perfect interchangeSTEYRNU309E/TGP1/C3Verified — Schaeffler Brand Interchange · last checked last month · perfect interchangeSKFNU309ECJ/C3Verified — Schaeffler Brand Interchange · last checked last month · perfect interchangeSKFNU309ECMVerified — Schaeffler Brand Interchange · last checked last month · perfect interchangeSKFNU309ECMAVerified — Schaeffler Brand Interchange · last checked last month · perfect interchangeSKFNU309ECMA/C3Verified — Schaeffler Brand Interchange · last checked last month · perfect interchangeSKFNU309ECM/C3Verified — Schaeffler Brand Interchange · last checked last month · perfect interchange
Technical Details & Applications
Specification variations and common equipment types.
Internal Clearance
Greater Than Normal (C3)
Increased radial internal clearance. Required when bearings operate at elevated temperatures or with tight shaft fits.
Temperature70-150°C operating temperature
Seal Type
Open (No Seal)
No seals or shields. Allows external lubrication and cooling. Lowest friction, highest speed capability.
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
Electric motorsPumps and compressorsConveyor rollersAgricultural machineryFans and blowersGearboxesPower transmission equipmentWashing machinesPrinting pressesHVACAutomotive alternators and A/C compressors
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