HK4512
Drawn cup needle roller bearings with no inner ring. Extremely compact radial envelope with high load capacity per unit volume. Shaft acts as inner raceway (must be hardened and ground).
SKFHK 151215 × 21 × 12mm
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$10.84
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Match Details
The specifications and details for why this match is correct.
Specifications
| Bore diameter (d) | 15 mm |
| Outer diameter (D) | 21 mm |
| Width (B) | 12 mm |
| Dynamic load rating (C) | 7.5 kN |
| Static load rating (C₀) | 9.1 kN |
| Weight | 11 g |
| Max speed (grease) | 11,000 rpm |
| Max speed (oil) | — |
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Tier-1 Brand Equivalents
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
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