HR30304J C3
FAG30304-XL C3
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Specifications
| Bore diameter (d) | 20 mm |
| Outer diameter (D) | 52 mm |
| Width (B) | 16.25 mm |
| Dynamic load rating (C) | 19.1 kN |
| Static load rating (C₀) | 11.4 kN |
| Weight | 98 g |
| Max speed (grease) | 8,400 rpm |
| Max speed (oil) | 10,800 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 | 30304-XL C3 | Open | C3 | Verified |
| NSK | HR30304J C3 | Open | C3 | Current |
| NTN | 4T-30304 C3 | Open | C3 | Verified |
| SKF | 30304 J2/Q C3 | Open | C3 | Verified |
| Timken | 30304 C3 | Open | C3 | Verified |
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
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
Where This Bearing Is Used
Medium-Small (20mm bore) — Typical Uses
- General-purpose electric motors (1-10 HP)
- Pumps and compressors
- Automotive alternators and A/C compressors
- Conveyor rollers
- Agricultural machinery
- Washing machines
- Industrial fans
- Printing presses
Other Variants Available
Same bearing geometry — different seal and clearance configurations.
| SKF Part Number | Seal Type | Clearance |
|---|---|---|
| 30304 J2/Q | Open (No Seal) | CN |
| 30304 J2/Q C3 | Open (No Seal) | C3 |