What is the equivalent of a NJ307ECM bearing?

The NJ307ECM is a 35×80×21mm cylindrical roller bearing with verified equivalents across multiple brands: NSK NJ307W, NTN NJ307ET2, SKF NJ 307 ECP, Timken NJ307EM. All equivalents share the same bore, outer diameter, width, and load ratings.

What are the dimensions of a NJ307ECM bearing?

The NJ307ECM bearing has a bore diameter of 35mm, outer diameter of 80mm, and width of 21mm. It has a dynamic load rating of 49.5 kN, static load rating of 47 kN, and weighs 460g. Maximum speed with grease lubrication is 6,700 rpm.

Can I replace a FAG NJ307ECM with a NSK equivalent?

Yes. FAG and NSK bearings with the same ISO designation are dimensionally interchangeable. The NJ307ECM (35×80×21mm) 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.

NJ307ECM

OpenCNCylindrical Roller BearingCylindrical Roller — Medium Series (NJ)

Medium cross-section cylindrical roller bearings (NJ-type) with one-direction axial restraint. Higher load capacity than NJ200 series. Same dimensions as NU300 but with semi-locating capability.

35 × 80 × 21mm

Open (no seal)

Cr 49.5 kN / C₀r 47 kN

6,700 rpm (grease)

FAGNJ307-E-TVP235 × 80 × 21mm

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Match Details

The specifications and details for why this match is correct.

Specifications

Bore diameter (d)	35 mm
Outer diameter (D)	80 mm
Width (B)	21 mm
Dynamic load rating (C)	49.5 kN
Static load rating (C₀)	47 kN
Weight	460 g
Max speed (grease)	6,700 rpm
Max speed (oil)	—

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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	NJ307-E-TVP2	Open	CN	Probable
NSK	NJ307W	Open	CN	Probable
NTN	NJ307ET2	Open	CN	Probable
SKF	NJ 307 ECP	Open	CN	Probable
Timken	NJ307EM	Open	CN	Probable

Legacy & Proprietary Numbers

SKFNJ307NSKNJ307NTNNJ307KOYONJ307RHPNJ307EJSNRNJ307STEYRNJ307ZIL120-1701066ZKLNJ307SKFNJ307ECJNSKNJ307ETNTNNJ307ESKFNJ307ECMSKFNJ307ECPSKFNJ307ECP/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

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