6303DDU
Higher load capacity than the 6200 series for the same bore size. Used where heavier radial loads are expected.
NSK6303DDU17 × 47 × 14mm
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$6.55
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Specifications
| Bore diameter (d) | 17 mm |
| Outer diameter (D) | 47 mm |
| Width (B) | 14 mm |
| Dynamic load rating (C) | 14.3 kN |
| Static load rating (C₀) | 6.55 kN |
| Weight | 110 g |
| Max speed (grease) | 22,000 rpm |
| Max speed (oil) | 34,000 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
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
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
Medium Series — Common Applications
- Heavy-duty electric motors
- Industrial pumps
- Conveyor systems
- Mining equipment
- Construction machinery
- Agricultural equipment
- Heavy gearboxes
- Compressors
- Paper and steel mills
- Vibrating screens
Heavy industryMiningConstructionPaper & pulpSteel
Miniature / Small (17mm bore) — Typical Uses
- Small electric motors (fractional HP)
- Fans and blowers
- Power tools (drills, grinders)
- Office equipment (printers, copiers)
- Household appliances
- Skateboards and roller skates
- RC vehicles and hobby motors
Other Variants Available
Same bearing geometry — different seal and clearance configurations.
| SKF Part Number | Seal Type | Clearance |
|---|---|---|
| 6303 | Open (No Seal) | CN |
| 6303 C3 | Open (No Seal) | C3 |
| 6303-2Z | ZZ | CN |
| 6303-2Z C3 | ZZ | C3 |
| 6303-2RS1 | 2RS | CN |
| 6303-2RS1 C3 | 2RS | C3 |