What is the equivalent of a 6304-2G bearing?

The 6304-2G is a 20×52×15mm deep groove ball bearing with verified equivalents across multiple brands: SKF 6304-2RS1, FAG 6304-2RSR, NTN 6304LLU, Timken 6304-2RS. All equivalents share the same bore, outer diameter, width, and load ratings.

What are the dimensions of a 6304-2G bearing?

The 6304-2G bearing has a bore diameter of 20mm, outer diameter of 52mm, and width of 15mm. It has a dynamic load rating of 16.8 kN, static load rating of 7.8 kN, and weighs 139g. Maximum speed with grease lubrication is 19,000 rpm.

Can I replace a NSK 6304-2G with a SKF equivalent?

Yes. NSK and SKF bearings with the same ISO designation are dimensionally interchangeable. The 6304-2G (20×52×15mm) can be replaced with the equivalent SKF part number as long as the seal type (2RS) and clearance class (CN) match. Always verify load ratings and speed limits for your specific application.

6304-2G

2RSCNDeep Groove Ball BearingVerified matchMedium Series

Higher load capacity than the 6200 series for the same bore size. Used where heavier radial loads are expected.

20 × 52 × 15mm

Rubber sealed → 2RS1 / 2RSR / DDU / LLU

Cr 16.8 kN / C₀r 7.8 kN

19,000 rpm (grease)

NSK6304DDU20 × 52 × 15mm

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Match Details

The specifications and details for why this match is correct.

Specifications

Bore diameter (d)	20 mm
Outer diameter (D)	52 mm
Width (B)	15 mm
Dynamic load rating (C)	16.8 kN
Static load rating (C₀)	7.8 kN
Weight	139 g
Max speed (grease)	19,000 rpm
Max speed (oil)	30,000 rpm

→ What does 2RS mean on a bearing?→ How to read a bearing part number

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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
NSK	6304DDU	2RS	CN	Verified
SKF	6304-2RS1	2RS	CN	Probable
FAG	6304-2RSR	2RS	CN	Probable
NTN	6304LLU	2RS	CN	Probable
Timken	6304-2RS	2RS	CN	Probable

Legacy & Proprietary Numbers

SKF6304-2RS1/C3PEER6304-2RLDNSK6304CMFEDERAL1304KOYO63042RSFLT6304.2RSNWG6304.2RSSTEYR6304-2GNTN6304LLRHP6304NSNR6304EFafnir304KFBC6304PMGM6304.2RSMRC304-SFederal1304FFGMN6304RSNew Departure88204ROVER130127FIAT61204060HOOVER7304JAWA6000306304NISSAN32219-H7300OPEL720015PIAG12/1629SOME73200889ZKL6304NSKF6304-2RS1/C3GJNPEER6304-2RLD-C3NSK6304DD

Show all 127 cross-references

FEDERAL1304CGKOYO6304DFLT6304NNWG6304.2ZSTEYR6304C4NTN6304LURHP6304NRSNR6304EEFafnir304KDFBC6304PPMGM6304RSMRC304-SFFFederal1304SFGMN6304ZNew Departure88504ROVER130127ZSKF6304-2RS1/C3HT51PEER6304-C3NSK6304DDUC3EFEDERAL1304FKOYO6304DDFLT6304NRNWG6304NSTEYR6304GNTN6304NRRHP6304RSSNR6304NFafnir304KDDFBC6304SRMGM6304ZMRC304-SZZSKF6304-2RS1/C3WTPEER6304-NR-C3NSK6304DDUCMFEDERAL1304FFKOYO6304NRFLT6304RSNWG6304RSSTEYR6304NRNTN6304ZRHP6304ZSNR6304NRSKF6304-2RS1/C4PEER6304-RLDNSK6304DUFEDERAL1304RKOYO6304RSFLT6304ZNWG6304ZSTEYR6304TG/C4SKF6304-2RS1/QE6PEER6304-ZDNSK6304NRFEDERAL1304RRKOYO6304ZSKF6304-2RSHPEER6304-ZD-C3NSK6304ZSKF6304-2RSH/C3PEER6304-ZZDSKF6304-2RSH/C3GJNPEER6304-ZZD-C3SKF6304-2RSJEMSKF6304-2Z/C3SKF6304-2Z/C3GJNSKF6304-2Z/C3HT22SKF6304-2Z/C3HT51SKF6304-2Z/C3QE6SKF6304-2Z/C3WTSKF6304-2ZJEMSKF6304/361153BSKF6304/C2SKF6304/C3SKF6304/C3QE6SKF6304/C4SKF6304/C5SKF6304ETN9/C3SKF6304JEMSKF6304NSKF6304N/C3SKF6304NRSKF6304NR/C3SKF6304NR/C3QE6SKF6304NRJEMSKF6304NR/QE6SKF6304/QE6SKF6304-RSSKF6304-RS1SKF6304-RS1/C3SKF6304-RSHSKF6304-RSH/C3SKF6304-RSJEMSKF6304TN9/C3SKF6304TN9/C4SKF6304-ZSKF6304-Z/C3SKF6304-ZJEM

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

Rubber Sealed (2RS)

Rubber contact seals on both sides. Superior protection from contaminants. Pre-lubricated, maintenance-free.

Avoid forVery high-speed applications (seal friction limits top speed). Environments exceeding 110°C.

Examples

Agricultural machinery
Conveyor rollers
Automotive components
Outdoor equipment
Washing machines

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
6304	Open (No Seal)	CN
6304 C3	Open (No Seal)	C3
6304-2Z	ZZ	CN
6304-2Z C3	ZZ	C3
6304-2RS1	2RS	CN
6304-2RS1 C3	2RS	C3

Related Bearings

Adjacent sizes and cross-series bearings from our catalog.