1309
Heavier self-aligning ball bearings with higher load capacity than 1200 series. For applications with significant misalignment and moderate radial loads.
SKF1309 ETN945 × 102 × 22mm
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$23.17
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Specifications
| Bore diameter (d) | 45 mm |
| Outer diameter (D) | 102 mm |
| Width (B) | 22 mm |
| Dynamic load rating (C) | 29.8 kN |
| Static load rating (C₀) | 14.3 kN |
| Weight | 560 g |
| Max speed (grease) | 5,950 rpm |
| Max speed (oil) | 7,650 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
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
Normal Clearance (CN)
Standard radial internal clearance. Suitable for most applications under normal operating conditions.
Best forGeneral-purpose use. Normal temperatures, standard fits, moderate speeds.
TemperatureUp to ~70°C operating temperature
Where This Bearing Is Used
Self-Aligning Medium Series — Common Applications
- Heavy conveyor systems
- Mining equipment
- Vibrating screens
- Agricultural harvesters
- Large fans and blowers
- Bulk material handling
- Food processing equipment
MiningHeavy industryAgricultureFood processing
Medium (45mm bore) — Typical Uses
- Industrial electric motors (10-50 HP)
- Gearboxes and speed reducers
- Heavy-duty pumps
- Conveyor systems
- Machine tool spindles
- Automotive wheel hubs
- Centrifugal fans
- Compressors
Other Variants Available
Same bearing geometry — different seal and clearance configurations.
| SKF Part Number | Seal Type | Clearance |
|---|---|---|
| 1309 ETN9 | Open (No Seal) | CN |
| 1309 ETN9 C3 | Open (No Seal) | C3 |