What is the equivalent of a 6308M bearing?

The 6308M is a 40×90×23mm deep groove ball bearing with verified equivalents across multiple brands: FAG 6308, NSK 6308, NTN 6308, Timken 6308. All equivalents share the same bore, outer diameter, width, and load ratings.

What are the dimensions of a 6308M bearing?

The 6308M bearing has a bore diameter of 40mm, outer diameter of 90mm, and width of 23mm. It has a dynamic load rating of 42.3 kN, static load rating of 24 kN, and weighs 611g. Maximum speed with grease lubrication is 11,000 rpm.

Can I replace a SKF 6308M with a FAG equivalent?

Yes. SKF and FAG bearings with the same ISO designation are dimensionally interchangeable. The 6308M (40×90×23mm) 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.

6308M

OpenCNDeep Groove Ball BearingMedium Series

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

SKF630840 × 90 × 23mm

In stock

Qty

$28.86

Partmatch price

Ships from EU warehouse
Ships within 2–3 business days
Order 5+ for 5% off · 10+ for 10% off

Secure checkout

Verified supplier

30-day returns

VisaMastercardAmex

Match Details

The specifications and details for why this match is correct.

Specifications

Bore diameter (d)	40 mm
Outer diameter (D)	90 mm
Width (B)	23 mm
Dynamic load rating (C)	42.3 kN
Static load rating (C₀)	24 kN
Weight	611 g
Max speed (grease)	11,000 rpm
Max speed (oil)	17,000 rpm

→ How to read a bearing part number

Get a PDF spec sheet

Save, print, or forward to procurement. We'll email it to you and download immediately.

Cross-References

Every way this part is identified across brands and catalogs.

Tier-1 Brand Equivalents

Brand	Part Number	Seal	Clearance	Status
SKF	6308	Open	CN	Probable
FAG	6308	Open	CN	Probable
NSK	6308	Open	CN	Verified
NTN	6308	Open	CN	Probable
Timken	6308	Open	CN	Probable

Legacy & Proprietary Numbers

SKF6308-2RSNSK6308C3ESTEYR6308-2GKOYO63082RSFLT6308.2RSPEER6308-2RLDRHP6308-2RSSNR6308ENTN6308LLNWG6308.2RSFBC6308PZWZ6308-2RSMGM6308.2ZFafnir308KFEDERAL1308MRC308-SCITR620211Federal1308FFNew Departure88208ZKL6308NCONT60122DAG631781DENN601395FORD12005545HOOVER7308NACHI6308-2NSEOPEL720005ROVER512000SKF6308-2RS1/C3NSK6308CM

Show all 146 cross-references

STEYR6308-2RS1/C3KOYO6308DFLT6308NPEER6308-C3RHP6308.2RSSNR6308EENTN6308LLUNWG6308.2ZFBC6308PPZWZ6308-2RSNMGM6308NFafnir308KDFEDERAL1308CGMRC308-SFFCITR6308ACFederal1308SFNew Departure88508ZKL6308ZSKF6308-2RS1/C3GJNNSK6308DDSTEYR6308-2Z/C3KOYO6308DDFLT6308NRPEER6308-RLDRHP6308.2ZSNR6308J40NTN6308NRNWG6308NFBC6308PPSRZWZ6308-2RZMGM6308RSFafnir308KDDFEDERAL1308FMRC308-SZZSKF6308-2RS1/C3HT51NSK6308DDUSTEYR6308-2ZNRKOYO6308NFLT6308RSPEER6308-ZDRHP6308NSNR6308NNTN6308ZNWG6308RSFBC6308PSRZWZ6308NMGM6308ZSKF6308-2RS1/C3WTNSK6308DDUC3ESTEYR6308C4KOYO6308NRFLT6308ZPEER6308-ZD-C3RHP6308NRSNR6308NRNTN6308ZNRNWG6308ZFBC6308SRZWZ6308-ZNSKF6308-2RSJEMNSK6308DDUCMSTEYR6308GKOYO6308RSFLT6308ZNRPEER6308-ZZDRHP6308RSSNR6308ZNTN6308ZZNWG6308ZNSKF6308-2Z/C3NSK6308DUSTEYR6308NKOYO6308ZFLT6308ZZPEER6308-ZZD-C3RHP6308ZSNR6308ZZSKF6308-2Z/C3GJNNSK6308MSTEYR6308NRKOYO6308ZNRSKF6308-2Z/C3HTNSK6308NSTEYR6308NR/C3KOYO6308ZZSKF6308-2Z/C3HT51NSK6308NRSTEYR6308ZSKF6308-2Z/C3WTNSK6308ZSTEYR6308ZNRSKF6308-2Z/C4NSK6308ZCMSKF6308-2ZJEMNSK6308ZNRSKF6308-2ZNRNSK6308ZZSKF6308/C3SKF6308/C4SKF6308JEMSKF6308MA/C3SKF6308M/C4VL0241SKF6308NSKF6308NJEMSKF6308NRSKF6308NR/C3SKF6308-RSSKF6308-RS1SKF6308-RS1/C3SKF6308-RSJEMSKF6308-ZSKF6308-Z/C3SKF6308-Z/C4SKF6308-Z/C5SKF6308-ZJEMSKF6308-ZNR

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
6308	Open (No Seal)	CN
6308 C3	Open (No Seal)	C3
6308-2Z	ZZ	CN
6308-2Z C3	ZZ	C3
6308-2RS1	2RS	CN
6308-2RS1 C3	2RS	C3

Related Bearings

Adjacent sizes and cross-series bearings from our catalog.