What is the equivalent of a 4T-30305-C3 bearing?

The 4T-30305-C3 is a 25×62×18.25mm ball bearing with verified equivalents across multiple brands: NSK HR30305J C3, NTN 4T-30305 C3, SKF 30305 J2/Q C3, Timken 30305 C3. All equivalents share the same bore, outer diameter, width, and load ratings.

What are the dimensions of a 4T-30305-C3 bearing?

The 4T-30305-C3 bearing has a bore diameter of 25mm, outer diameter of 62mm, and width of 18.25mm. It has a dynamic load rating of 27 kN, static load rating of 14.8 kN, and weighs 166g. Maximum speed with grease lubrication is 7,200 rpm.

Can I replace a FAG 4T-30305-C3 with a NSK equivalent?

Yes. FAG and NSK bearings with the same ISO designation are dimensionally interchangeable. The 4T-30305-C3 (25×62×18.25mm) 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.

4T-30305-C3

OpenC3Tapered Roller BearingVerified match

25 × 62 × 18.25mm

Open (no seal)

Cr 27 kN / C₀r 14.8 kN

7,200 rpm (grease)

FAG30305-XL C3

Pricing not yet available for this part.

Match Details

The specifications and details for why this match is correct.

Specifications

Bore diameter (d)	25 mm
Outer diameter (D)	62 mm
Width (B)	18.25 mm
Dynamic load rating (C)	27 kN
Static load rating (C₀)	14.8 kN
Weight	166 g
Max speed (grease)	7,200 rpm
Max speed (oil)	9,600 rpm

→ 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	30305-XL C3	Open	C3	Verified
NSK	HR30305J C3	Open	C3	Verified
NTN	4T-30305 C3	Open	C3	Verified
SKF	30305 J2/Q C3	Open	C3	Verified
Timken	30305 C3	Open	C3	Verified

Legacy & Proprietary Numbers

FLT30305GPZ7305KOYO30305MGM30305NSK30305NTN30305STEYR30305TIMKEN30305ZKL30305

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.

Same Geometry, Different Configuration

SKF Part Number	Seal Type	Clearance
30305 J2/Q	Open (No Seal)	CN
30305 J2/Q C3	Open (No Seal)	C3

Related Bearings

Adjacent sizes and cross-series bearings from our catalog.