What is the equivalent of a 6309C3 bearing?

The 6309C3 is a 45×100×25mm deep groove ball bearing with verified equivalents across multiple brands: FAG 6309-C3, NSK 6309 C3E, NTN 6309 C3, Timken 6309 C3. All equivalents share the same bore, outer diameter, width, and load ratings.

What are the dimensions of a 6309C3 bearing?

The 6309C3 bearing has a bore diameter of 45mm, outer diameter of 100mm, and width of 25mm. It has a dynamic load rating of 55.3 kN, static load rating of 31.5 kN, and weighs 817g. Maximum speed with grease lubrication is 9,500 rpm.

Can I replace a SKF 6309C3 with a FAG equivalent?

Yes. SKF and FAG bearings with the same ISO designation are dimensionally interchangeable. The 6309C3 (45×100×25mm) can be replaced with the equivalent FAG part number as long as the seal type (open) and clearance class (C3) match. Always verify load ratings and speed limits for your specific application.

6309C3

OpenC3Deep Groove Ball BearingVerified matchMedium Series

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

45 × 100 × 25mm

Open (no seal)

Cr 55.3 kN / C₀r 31.5 kN

9,500 rpm (grease)

SKF6309 C345 × 100 × 25mm

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Match Details

The specifications and details for why this match is correct.

Specifications

Bore diameter (d)	45 mm
Outer diameter (D)	100 mm
Width (B)	25 mm
Dynamic load rating (C)	55.3 kN
Static load rating (C₀)	31.5 kN
Weight	817 g
Max speed (grease)	9,500 rpm
Max speed (oil)	15,000 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	6309 C3	Open	C3	Verified
FAG	6309-C3	Open	C3	Probable
NSK	6309 C3E	Open	C3	Verified
NTN	6309 C3	Open	C3	Verified
Timken	6309 C3	Open	C3	Probable

Legacy & Proprietary Numbers

SKF6309-2RSSTEYR6309-2GNSK6309C3EPEER6309-2RLDKOYO63092RSRHP6309-2RSSNR6309EFLT6309.2RSNTN6309LLNWG6309.2RSFEDERAL1309FBC6309PZWZ6309-2RSFafnir309KMGM6309.2ZMRC309-SFederal1309FFHOOVER7309New Departure88209ZKL6309NFIAT621653GAZ63-1802060NISSAN32203-61500STEY6317URB6309-2ZP6ELSKF6309-2RS1/C3STEYR6309-2RS1/C3NSK6309DDPEER6309-2RLD-C3KOYO6309D

Show all 137 cross-references

RHP6309.2RSSNR6309EEFLT6309NNTN6309LLUNWG6309.2ZFEDERAL1309CGFBC6309PPZWZ6309NFafnir309KDMGM6309NMRC309-SFFFederal1309SFHOOVER7309GNew Departure88509ZKL6309ZSKF6309-2RS1/C3GJNSTEYR6309-2Z/C3NSK6309DDUPEER6309-NRKOYO6309DDRHP6309.2ZSNR6309NFLT6309NRNTN6309LUNWG6309NFEDERAL1309FFBC6309PSRZWZ6309NRFafnir309KDDMGM6309ZMRC309-SZZSKF6309-2RS1/C3HT51STEYR6309C3NSK6309DDUCMPEER6309-RLDKOYO6309NRRHP6309NSNR6309NC3FLT6309RSNTN6309NRNWG6309RSFEDERAL1309FFFBC6309SRZWZ6309-ZNSKF6309-2RS1/C3WTSTEYR6309C4NSK6309DUPEER6309-RLD-C3KOYO6309RSRHP6309NRSNR6309NJ30FLT6309ZNTN6309ZNWG6309ZFEDERAL1309GFSKF6309-2RSJEMSTEYR6309GNSK6309DUCMPEER6309-ZDKOYO6309ZRHP6309RSSNR6309NRFLT6309ZNRNTN6309ZNRNWG6309ZNSKF6309-2Z/C3STEYR6309M1NSK6309MPEER6309-ZD-C3KOYO6309ZNRRHP6309ZSNR6309ZSKF6309-2Z/C3GJNSTEYR6309NNSK6309NRPEER6309-ZZDSKF6309-2Z/C3HTSTEYR6309NRNSK6309ZPEER6309-ZZD-C3SKF6309-2Z/C3HT51STEYR6309NR/C3NSK6309ZNRSKF6309-2ZJEMSTEYR6309RS1SKF6309/C2STEYR6309ZSKF6309/C3SKF6309/C4SKF6309JEMSKF6309M4SKF6309M4A/C3SKF6309M/C3SKF6309NSKF6309NRSKF6309NR/C3SKF6309NRJEMSKF6309-RSSKF6309-RS1SKF6309-RS1/C3SKF6309-RSJEMSKF6309-ZSKF6309-Z/C3SKF6309-Z/C4SKF6309-Z/C5SKF6309-ZJEMSKF6309-ZNR

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

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
6309	Open (No Seal)	CN
6309 C3	Open (No Seal)	C3
6309-2Z	ZZ	CN
6309-2Z C3	ZZ	C3
6309-2RS1	2RS	CN
6309-2RS1 C3	2RS	C3

Related Bearings

Adjacent sizes and cross-series bearings from our catalog.