What is the equivalent of a 6303 bearing?

The 6303 is a 17×47×14mm deep groove ball bearing with verified equivalents across multiple brands: FAG 6303, NSK 6303, NTN 6303, Timken 6303. All equivalents share the same bore, outer diameter, width, and load ratings.

What are the dimensions of a 6303 bearing?

The 6303 bearing has a bore diameter of 17mm, outer diameter of 47mm, and width of 14mm. It has a dynamic load rating of 14.3 kN, static load rating of 6.55 kN, and weighs 110g. Maximum speed with grease lubrication is 22,000 rpm.

Can I replace a SKF 6303 with a FAG equivalent?

Yes. SKF and FAG bearings with the same ISO designation are dimensionally interchangeable. The 6303 (17×47×14mm) can be replaced with the equivalent FAG part number as long as the seal type (open) and clearance class (CN) match. Always verify load ratings and speed limits for your specific application.

6303

OpenCNDeep Groove Ball BearingVerified matchMedium Series

Higher load capacity than the 6200 series for the same bore size. Used where heavier radial loads are expected.

17 × 47 × 14mm

Open (no seal)

Cr 14.3 kN / C₀r 6.55 kN

22,000 rpm (grease)

SKF630317 × 47 × 14mm

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Match Details

The specifications and details for why this match is correct.

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

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Why This Match Is Correct

✓Exact dimensional match (bore, OD, width)

✓Load ratings within tolerance

✓Seal type verified via manufacturer tables

✓Speed rating compatible

Cross-References

Every way this part is identified across brands and catalogs.

Tier-1 Brand Equivalents

Brand	Part Number	Seal	Clearance	Status
SKF	6303	Open	CN	Current
FAG	6303	Open	CN	Current
NSK	6303	Open	CN	Current
NTN	6303	Open	CN	Current
Timken	6303	Open	CN	Current

Legacy & Proprietary Numbers

SKF6303-2RSPEER6303-2RLADKOYO63032RSFLT6303.2RSNSK6303DDNTN6303LLSNR6303ESTEYR6303-2GRHP6303-2RSMGM6303.2RSFafnir303KGMN6303-2RSMRC303-SNWG6303.2ZFBC6303PFederal1303FFNew Departure88203NISSAN23120-12210OPEL1205226FEDERAL1303HOOVER7303JAWA6000306303ZKL6303ZZWZ6303-2RSSKF6303-2RS1/C3PEER6303-2RLDKOYO6303DFLT6303NNSK6303DDUNTN6303LLU

Show all 116 cross-references

SNR6303EESTEYR6303-2Z/C3RHP6303NMGM6303.2ZFafnir303KDGMN6303RSMRC303-SFFNWG6303NFBC6303PPFederal1303SFNew Departure88503NISSAN32219-H1000OPEL1205229SKF6303-2RS1/C3GJNPEER6303-2RLD-C3KOYO6303DDFLT6303NRNSK6303DDUCMNTN6303LUSNR6303EJ30STEYR6303GRHP6303NRMGM6303RSFafnir303KDDGMN6303ZMRC303-SZZNWG6303ZSKF6303-2RS1/C3HT51PEER6303-C3KOYO6303NRFLT6303RSNSK6303DUNTN6303NRSNR6303NSTEYR6303NRRHP6303RSMGM6303ZSKF6303-2RS1/QE6PEER6303-RLDKOYO6303RSFLT6303ZNSK6303NRNTN6303ZSNR6303NRSTEYR6303ZRHP6303ZSKF6303-2RSHPEER6303-RLD-C3KOYO6303ZFLT6303ZZNSK6303ZNTN6303ZC3/3ASNR6303ZSTEYR6303Z/C3SKF6303-2RSH/C3PEER6303-ZDKOYO6303ZZSKF6303-2RSH/C3GJNPEER6303-ZD-C3SKF6303-2RSJEMPEER6303-ZZDSKF6303-2Z/C3PEER6303-ZZD-C3SKF6303-2Z/C3GJNSKF6303-2Z/C3HT51SKF6303-2Z/C3QE6SKF6303-2Z/C3WTSKF6303-2ZJEMSKF6303/C3SKF6303/C3QE6SKF6303/C4SKF6303JEMSKF6303NSKF6303NR/C3SKF6303NR/C3QE6SKF6303NRJEMSKF6303/QE6SKF6303-RSSKF6303-RS1SKF6303-RS1/C3SKF6303-RSHSKF6303-RSJEMSKF6303TN9/C3SKF6303-ZSKF6303-Z/C3SKF6303-ZJEM

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

Alternative Parts

Options if this exact part isn't what you need.

Same Geometry, Different Configuration

SKF Part Number	Seal Type	Clearance
6303 C3	Open (No Seal)	C3
6303-2Z	ZZ	CN
6303-2Z C3	ZZ	C3
6303-2RS1	2RS	CN
6303-2RS1 C3	2RS	C3

Related Bearings

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