What is the equivalent of a NU-308-ECP bearing?

The NU-308-ECP is a 40×90×23mm ball bearing with verified equivalents across multiple brands: NSK NU308W, NTN NU308ET2, SKF NU 308 ECP, Timken NU308EM. All equivalents share the same bore, outer diameter, width, and load ratings.

What are the dimensions of a NU-308-ECP bearing?

The NU-308-ECP bearing has a bore diameter of 40mm, outer diameter of 90mm, and width of 23mm. It has a dynamic load rating of 58.5 kN, static load rating of 57 kN, and weighs 650g. Maximum speed with grease lubrication is 6,000 rpm.

Can I replace a FAG NU-308-ECP with a NSK equivalent?

Yes. FAG and NSK bearings with the same ISO designation are dimensionally interchangeable. The NU-308-ECP (40×90×23mm) can be replaced with the equivalent NSK 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.

NU-308-ECP

OpenCNCylindrical Roller BearingVerified match

40 × 90 × 23mm

Open (no seal)

Cr 58.5 kN / C₀r 57 kN

6,000 rpm (grease)

FAGNU308-E-TVP240 × 90 × 23mm

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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)	58.5 kN
Static load rating (C₀)	57 kN
Weight	650 g
Max speed (grease)	6,000 rpm
Max speed (oil)	8,000 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
FAG	NU308-E-TVP2	Open	CN	Verified
NSK	NU308W	Open	CN	Verified
NTN	NU308ET2	Open	CN	Verified
SKF	NU 308 ECP	Open	CN	Verified
Timken	NU308EM	Open	CN	Verified

Legacy & Proprietary Numbers

SKFNU308STEYRNU308E/JP1/C3NTNNU308DAF701495KASE6.3001.1KOYONU308NSKNU308SNRNU308ZKLNU308SKFNU308ECJSTEYRNU308E/M6NTNNU308ESKFNU308ECJ/C3STEYRNU308E/TGP1/C3SKFNU308ECMSKFNU308ECM/C3SKFNU308ECPSKFNU308ECP/C3

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
NU 308 ECP	Open (No Seal)	CN
NU 308 ECP/C3	Open (No Seal)	C3

Related Bearings

Adjacent sizes and cross-series bearings from our catalog.