What is the equivalent of a NJ309ECP-C3 bearing?

The NJ309ECP-C3 is a 45×100×25mm cylindrical roller bearing with verified equivalents across multiple brands: NSK NJ309W C3, NTN NJ309ET2 C3, SKF NJ 309 ECP/C3, Timken NJ309EM/C3. All equivalents share the same bore, outer diameter, width, and load ratings.

What are the dimensions of a NJ309ECP-C3 bearing?

The NJ309ECP-C3 bearing has a bore diameter of 45mm, outer diameter of 100mm, and width of 25mm. It has a dynamic load rating of 74 kN, static load rating of 71 kN, and weighs 856g. Maximum speed with grease lubrication is 5,300 rpm.

Can I replace a FAG NJ309ECP-C3 with a NSK equivalent?

Yes. FAG and NSK bearings with the same ISO designation are dimensionally interchangeable. The NJ309ECP-C3 (45×100×25mm) can be replaced with the equivalent NSK part number as long as the seal type (open) and clearance class (C3) match. Always verify load ratings and speed limits for your specific application.

NJ309ECP-C3

OpenC3Cylindrical 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.

45 × 100 × 25mm

Open (no seal)

Cr 74 kN / C₀r 71 kN

5,300 rpm (grease)

FAGNJ309-E-TVP2-C3

Pricing not yet available for this part.

Match Details

The specifications and details for why this match is correct.

Specifications

Bore diameter (d)	45 mm
Outer diameter (D)	100 mm
Width (B)	25 mm
Dynamic load rating (C)	74 kN
Static load rating (C₀)	71 kN
Weight	856 g
Max speed (grease)	5,300 rpm
Max speed (oil)	—

→ 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.

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	NJ309-E-TVP2-C3	Open	C3	Probable
NSK	NJ309W C3	Open	C3	Probable
NTN	NJ309ET2 C3	Open	C3	Probable
SKF	NJ 309 ECP/C3	Open	C3	Probable
Timken	NJ309EM/C3	Open	C3	Probable

Legacy & Proprietary Numbers

SKFNJ309NSKNJ309NTNNJ309CITR620212KOYONJ309RHPNJ309EJSNRNJ309STEYRNJ309ZKLNJ309SKFNJ309ECJNSKNJ309EMNTNNJ309ESKFNJ309ECJ/C3SKFNJ309ECPSKFNJ309ECP/C3SKFNJ309ECP/C4

Technical Details & Applications

Specification variations and common equipment types.

Internal Clearance

Greater Than Normal (C3)

Increased radial internal clearance. Required when bearings operate at elevated temperatures or with tight shaft fits.

Temperature70-150°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.

Related Bearings

Adjacent sizes and cross-series bearings from our catalog.