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Description
NTN:6303c3
6303 → Bearing series and size
6 = Deep groove ball bearing
3 = Light-to-medium duty series
03 = Bore size code (17 mm)
C3 → Internal clearance greater than normal (for higher speed or temperature applications)
Dimensions
Inner Diameter (ID): 17 mm
Outer Diameter (OD): 47 mm
Width: 14 mm
Key Features
Deep groove design → handles radial loads + moderate axial loads
C3 clearance → ideal for:
Higher operating temperatures
Higher speeds
Situations with shaft expansion
Typically available in:
Open (6303 C3)
Shielded (ZZ)
Sealed (2RS)
Common Applications
Electric motors
Small engines
Automotive components (alternators, pumps)
Industrial machinery
Equivalent Bearings (Cross Reference)
SKF: 6303 C3
Timken/Fafnir: 203KDD / 203PP
NSK: 6303 C3
Nachi: 6303 C3
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