HR30308J-C3
FAG30308-XL C3
Pricing not yet available for this part.
Geometry100%
40 × 90 × 25.25mm
Sealing100%
Open (no seal)
Load rating100%
Cr 49.2 kN / C₀r 29.1 kN
Speed100%
4,800 rpm (grease)
Specifications
| Bore diameter (d) | 40 mm |
| Outer diameter (D) | 90 mm |
| Width (B) | 25.25 mm |
| Dynamic load rating (C) | 49.2 kN |
| Static load rating (C₀) | 29.1 kN |
| Weight | 484 g |
| Max speed (grease) | 4,800 rpm |
| Max speed (oil) | 6,000 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 |
|---|---|---|---|---|
| FAG | 30308-XL C3 | Open | C3 | Verified |
| NSK | HR30308J C3 | Open | C3 | Verified |
| NTN | 4T-30308 C3 | Open | C3 | Verified |
| SKF | 30308 J2/Q C3 | Open | C3 | Verified |
| Timken | 30308 C3 | Open | C3 | Verified |
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
Industrial electric motors (10-50 HP)Gearboxes and speed reducersHeavy-duty pumpsConveyor systemsMachine tool spindlesAutomotive wheel hubsCentrifugal fansCompressors
Other Variants Available
Same bearing geometry — different seal and clearance configurations.
| SKF Part Number | Seal Type | Clearance |
|---|---|---|
| 30308 J2/Q | Open (No Seal) | CN |
| 30308 J2/Q C3 | Open (No Seal) | C3 |