UCF204
Heavy-duty 4-bolt square flange bearing units for rigid mounting on flat surfaces. Higher load capacity and rigidity than 2-bolt flange units.
Geometry100%
20 × 108 × 78mm
Sealing100%
Open (no seal)
Load rating100%
Cr 12.7 kN / C₀r 6.55 kN
Speed100%
4,500 rpm (grease)
SKFUCF 20420 × 108 × 78mm
In stock
$38.88
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Match Details
The specifications and details for why this match is correct.
Specifications
| Bore diameter (d) | 20 mm |
| Outer diameter (D) | 108 mm |
| Width (B) | 78 mm |
| Dynamic load rating (C) | 12.7 kN |
| Static load rating (C₀) | 6.55 kN |
| Weight | 740 g |
| Max speed (grease) | 4,500 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 |
|---|---|---|---|---|
| SKF | UCF 204 | Open | CN | Verified |
| FAG | UCF204 | Open | CN | Current |
| NSK | UCF204 | Open | CN | Current |
| NTN | UCF204 | Open | CN | Current |
| Timken | UCF204 | Open | CN | Current |
Technical Details & Applications
Specification variations and common equipment types.
Internal Clearance
Normal Clearance (CN)
Standard radial internal clearance. Suitable for most applications under normal operating conditions.
TemperatureUp to ~70°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
Alternative Parts
Options if this exact part isn't what you need.
Same Geometry, Different Configuration
| SKF Part Number | Seal Type | Clearance |
|---|---|---|
| UCF 204 | Open (No Seal) | CN |
Related Bearings
Adjacent sizes and cross-series bearings from our catalog.