What is the equivalent of a NJ312 bearing?

The NJ312 is a 60×130×31mm cylindrical roller bearing with verified equivalents across multiple brands: NSK NJ312W, NTN NJ312ET2, SKF NJ 312 ECP, Timken NJ312EM. All equivalents share the same bore, outer diameter, width, and load ratings.

What are the dimensions of a NJ312 bearing?

The NJ312 bearing has a bore diameter of 60mm, outer diameter of 130mm, and width of 31mm. It has a dynamic load rating of 124 kN, static load rating of 126 kN, and weighs 1800g. Maximum speed with grease lubrication is 3,800 rpm.

Can I replace a FAG NJ312 with a NSK equivalent?

Yes. FAG and NSK bearings with the same ISO designation are dimensionally interchangeable. The NJ312 (60×130×31mm) 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.

NJ312

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.

60 × 130 × 31mm

Open (no seal)

Cr 124 kN / C₀r 126 kN

3,800 rpm (grease)

FAGNJ312-E-TVP260 × 130 × 31mm

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Match Details

The specifications and details for why this match is correct.

Specifications

Bore diameter (d)	60 mm
Outer diameter (D)	130 mm
Width (B)	31 mm
Dynamic load rating (C)	124 kN
Static load rating (C₀)	126 kN
Weight	1800 g
Max speed (grease)	3,800 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	NJ312-E-TVP2	Open	CN	Probable
NSK	NJ312W	Open	CN	Probable
NTN	NJ312ET2	Open	CN	Probable
SKF	NJ 312 ECP	Open	CN	Probable
Timken	NJ312EM	Open	CN	Probable

Legacy & Proprietary Numbers

SKFNJ312NTNNJ312STEYRNJ312KOYONJ312NSKNJ312SNRNJ312ZKLNJ312SKFNJ312ECJNTNNJ312ESTEYRNJ312E/M6/C3SKFNJ312ECJ/C3SKFNJ312ECM/C3SKFNJ312ECM/C4VA301SKFNJ312ECPSKFNJ312ECP/C3SKFNJ312ECP/C4

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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