What is the equivalent of a 6303-ZZ bearing?

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

What are the dimensions of a 6303-ZZ bearing?

The 6303-ZZ 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-ZZ with a FAG equivalent?

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

6303-ZZ

ZZCNDeep 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

Cr 14.3 kN / C₀r 6.55 kN

22,000 rpm (grease)

SKF6303-2Z17 × 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	6303-2Z	ZZ	CN	Verified
FAG	6303-2ZR	ZZ	CN	Probable
NSK	6303ZZ	ZZ	CN	Verified
NTN	6303ZZ	ZZ	CN	Verified
Timken	6303-ZZ	ZZ	CN	Current

Legacy & Proprietary Numbers

SKF6303-2RSPEER6303-2RLADKOYO63032RSNSK6303DDNTN6303LLSNR6303ESTEYR6303-2GFLT6303.2RSRHP6303-2RSMGM6303.2RSFafnir303KGMN6303-2RSMRC303-SNWG6303.2ZFBC6303PFederal1303FFNew Departure88203NISSAN23120-12210OPEL1205226FEDERAL1303HOOVER7303JAWA6000306303ZKL6303ZZWZ6303-2RSSKF6303-2RS1/C3PEER6303-2RLDKOYO6303DNSK6303DDUNTN6303LLUSNR6303EE

Show all 114 cross-references

STEYR6303-2Z/C3FLT6303NRHP6303NMGM6303.2ZFafnir303KDGMN6303RSMRC303-SFFNWG6303NFBC6303PPFederal1303SFNew Departure88503NISSAN32219-H1000OPEL1205229SKF6303-2RS1/C3GJNPEER6303-2RLD-C3KOYO6303DDNSK6303DDUCMNTN6303LUSNR6303EJ30STEYR6303GFLT6303NRRHP6303NRMGM6303RSFafnir303KDDGMN6303ZMRC303-SZZNWG6303ZSKF6303-2RS1/C3HT51PEER6303-C3KOYO6303NRNSK6303DUNTN6303NRSNR6303NSTEYR6303NRFLT6303RSRHP6303RSMGM6303ZSKF6303-2RS1/QE6PEER6303-RLDKOYO6303RSNSK6303NRNTN6303ZSNR6303NRSTEYR6303ZFLT6303ZRHP6303ZSKF6303-2RSHPEER6303-RLD-C3KOYO6303ZNSK6303ZNTN6303ZC3/3ASNR6303ZSTEYR6303Z/C3SKF6303-2RSH/C3PEER6303-ZDSKF6303-2RSH/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

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

Related Bearings

Adjacent sizes and cross-series bearings from our catalog.