6211DD
The most widely used bearing series. Versatile, good balance of load capacity and speed. The go-to choice for general-purpose applications.
SKF6211-2RS155 × 100 × 21mm
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$42.21
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Geometry100%
55 × 100 × 21mm
Sealing100%
Rubber sealed → 2RS1 / 2RSR / DDU / LLU
Load rating100%
Cr 46.2 kN / C₀r 29 kN
Speed100%
9,000 rpm (grease)
Specifications
| Bore diameter (d) | 55 mm |
| Outer diameter (D) | 100 mm |
| Width (B) | 21 mm |
| Dynamic load rating (C) | 46.2 kN |
| Static load rating (C₀) | 29 kN |
| Weight | 591 g |
| Max speed (grease) | 9,000 rpm |
| Max speed (oil) | 14,000 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
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
Seal Type
Rubber Sealed (2RS)
Rubber contact seals on both sides. Superior protection from contaminants. Pre-lubricated, maintenance-free.
Best forDirty, dusty, or wet environments. Applications requiring long maintenance-free operation.
Avoid forVery high-speed applications (seal friction limits top speed). Environments exceeding 110°C.
Examples
- Agricultural machinery
- Conveyor rollers
- Automotive components
- Outdoor equipment
- Washing machines
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 wheelsLarge electric motors (50+ HP)Industrial gearboxesHeavy-duty conveyor systemsMining and construction equipmentPaper mill machinerySteel rolling millsLarge compressorsWind turbine components
ManufacturingAutomotiveAgricultureHVACConsumer goods
Other Variants Available
Same bearing geometry — different seal and clearance configurations.
| SKF Part Number | Seal Type | Clearance |
|---|---|---|
| 6211 | Open (No Seal) | CN |
| 6211 C3 | Open (No Seal) | C3 |
| 6211-2Z | ZZ | CN |
| 6211-2Z C3 | ZZ | C3 |
| 6211-2RS1 | 2RS | CN |
| 6211-2RS1 C3 | 2RS | C3 |