What is the equivalent of a 6303Z-C3 bearing?

The 6303Z-C3 is a 17×47×14mm deep groove ball bearing with verified equivalents across multiple brands: NSK 6303ZZ C3E, NTN 6303ZZ/C3, SKF 6303-2Z C3, Timken 6303-ZZ C3. All equivalents share the same bore, outer diameter, width, and load ratings.

What are the dimensions of a 6303Z-C3 bearing?

The 6303Z-C3 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 FAG 6303Z-C3 with a NSK equivalent?

Yes. FAG and NSK bearings with the same ISO designation are dimensionally interchangeable. The 6303Z-C3 (17×47×14mm) can be replaced with the equivalent NSK part number as long as the seal type (ZZ) and clearance class (C3) match. Always verify load ratings and speed limits for your specific application.

6303Z-C3

ZZC3Deep Groove Ball BearingMedium Series

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

FAG6303-2ZR-C3

Pricing not yet available for this part.

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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Cross-References

Every way this part is identified across brands and catalogs.

Tier-1 Brand Equivalents

Brand	Part Number	Seal	Clearance	Status
FAG	6303-2ZR-C3	ZZ	C3	Probable
NSK	6303ZZ C3E	ZZ	C3	Verified
NTN	6303ZZ/C3	ZZ	C3	Probable
SKF	6303-2Z C3	ZZ	C3	Probable
Timken	6303-ZZ C3	ZZ	C3	Probable

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

Greater Than Normal (C3)

Increased radial internal clearance. Required when bearings operate at elevated temperatures or with tight shaft fits.

Temperature70-150°C operating temperature

Seal Type

Metal Shielded (ZZ / 2Z)

Metal shields on both sides. Moderate protection from dust and debris. Pre-lubricated with grease.

Avoid forHarsh environments with heavy moisture, chemicals, or fine dust ingress.

Examples

Electric motors
Fans and blowers
Power tools
HVAC 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	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

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