What is the equivalent of a NJ310W bearing?

The NJ310W is a 50×110×27mm cylindrical roller bearing with verified equivalents across multiple brands: NSK NJ310W, NTN NJ310ET2, SKF NJ 310 ECP, Timken NJ310EM. All equivalents share the same bore, outer diameter, width, and load ratings.

What are the dimensions of a NJ310W bearing?

The NJ310W bearing has a bore diameter of 50mm, outer diameter of 110mm, and width of 27mm. It has a dynamic load rating of 87 kN, static load rating of 86 kN, and weighs 1140g. Maximum speed with grease lubrication is 4,800 rpm.

Can I replace a FAG NJ310W with a NSK equivalent?

Yes. FAG and NSK bearings with the same ISO designation are dimensionally interchangeable. The NJ310W (50×110×27mm) 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.

NJ310W

OpenCNCylindrical Roller BearingVerified matchCylindrical 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.

50 × 110 × 27mm

Open (no seal)

Cr 87 kN / C₀r 86 kN

4,800 rpm (grease)

FAGNJ310-E-TVP250 × 110 × 27mm

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Match Details

The specifications and details for why this match is correct.

Specifications

Bore diameter (d)	50 mm
Outer diameter (D)	110 mm
Width (B)	27 mm
Dynamic load rating (C)	87 kN
Static load rating (C₀)	86 kN
Weight	1140 g
Max speed (grease)	4,800 rpm
Max speed (oil)	6,300 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	NJ310-E-TVP2	Open	CN	Verified
NSK	NJ310W	Open	CN	Current
NTN	NJ310ET2	Open	CN	Verified
SKF	NJ 310 ECP	Open	CN	Verified
Timken	NJ310EM	Open	CN	Verified

Legacy & Proprietary Numbers

SKFNJ310STEYRNJ310NTNNJ310ENASA620413KOYONJ310NSKNJ310SNRNJ310ZKLNJ310SKFNJ310ECJSTEYRNJ310E/M6/C3NTNNJ310ESKFNJ310ECJ/C3STEYRNJ310E/TGP1SKFNJ310ECJ/C4SKFNJ310ECM/C3SKFNJ310ECM/C4SKFNJ310ECP

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
NJ 310 ECP	Open (No Seal)	CN
NJ 310 ECP/C3	Open (No Seal)	C3

Related Bearings

Adjacent sizes and cross-series bearings from our catalog.