6203/C3
The most widely used bearing series. Versatile, good balance of load capacity and speed. The go-to choice for general-purpose applications.
SKF6203 C317 × 40 × 12mm
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$5.59
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Specifications
| Bore diameter (d) | 17 mm |
| Outer diameter (D) | 40 mm |
| Width (B) | 12 mm |
| Dynamic load rating (C) | 9.95 kN |
| Static load rating (C₀) | 4.75 kN |
| Weight | 62 g |
| Max speed (grease) | 24,000 rpm |
| Max speed (oil) | 38,000 rpm |
Equivalents Across Brands
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
Electric motorsPumps and compressorsConveyor rollersAgricultural machineryAutomotive components (alternators, water pumps, A/C)Washing machines and dryersFans and blowersGearboxesPower transmission equipmentSkateboard and inline skate wheelsSmall electric motors (fractional HP)Power tools (drills, grinders)Office equipment (printers, copiers)Household appliancesSkateboards and roller skatesRC vehicles and hobby motors
ManufacturingAutomotiveAgricultureHVACConsumer goods
Other Variants Available
Same bearing geometry — different seal and clearance configurations.
| SKF Part Number | Seal Type | Clearance |
|---|---|---|
| 6203 | Open (No Seal) | CN |
| 6203 C3 | Open (No Seal) | C3 |
| 6203-2Z | ZZ | CN |
| 6203-2Z C3 | ZZ | C3 |
| 6203-2RS1 | 2RS | CN |
| 6203-2RS1 C3 | 2RS | C3 |