What is the equivalent of a 6004DDU bearing?

The 6004DDU is a 20×42×12mm deep groove ball bearing with verified equivalents across multiple brands: FAG 6004-2RSR, NSK 6004DDU, NTN 6004LLU, Timken 6004-2RS. All equivalents share the same bore, outer diameter, width, and load ratings.

What are the dimensions of a 6004DDU bearing?

The 6004DDU bearing has a bore diameter of 20mm, outer diameter of 42mm, and width of 12mm. It has a dynamic load rating of 9.95 kN, static load rating of 5 kN, and weighs 65.6g. Maximum speed with grease lubrication is 24,000 rpm.

Can I replace a SKF 6004DDU with a FAG equivalent?

Yes. SKF and FAG bearings with the same ISO designation are dimensionally interchangeable. The 6004DDU (20×42×12mm) can be replaced with the equivalent FAG 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.

6004DDU

2RSCNDeep Groove Ball BearingVerified matchExtra Light Series

Compact bearings for space-constrained applications. Lower load capacity but higher speed ratings.

20 × 42 × 12mm

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

Cr 9.95 kN / C₀r 5 kN

24,000 rpm (grease)

SKF6004-2RS120 × 42 × 12mm

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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)	42 mm
Width (B)	12 mm
Dynamic load rating (C)	9.95 kN
Static load rating (C₀)	5 kN
Weight	65.6 g
Max speed (grease)	24,000 rpm
Max speed (oil)	38,000 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
SKF	6004-2RS1	2RS	CN	Verified
FAG	6004-2RSR	2RS	CN	Probable
NSK	6004DDU	2RS	CN	Current
NTN	6004LLU	2RS	CN	Verified
Timken	6004-2RS	2RS	CN	Verified

Legacy & Proprietary Numbers

SKF6004-2RS1/C2NSK6004C3EPEER6004-2RLDFLT6004.2RSKOYO60042RSNTN6004LLBSNR6004ESTEYR6004-2ZNNACHI6004NRGMN6004RSMGM6004.2ZNWG6004.2ZBOHL60060040CITR620001RHP6004RSVAG240100510SKF6004-2RS1/C3NSK6004DDPEER6004-2RLD-C3FLT6004.2RSNRKOYO6004NRNTN6004LUSNR6004EESTEYR6004C3NACHI6004ZGMN6004ZMGM6004ZNWG6004ZSKF6004-2RS1/C3GJNNSK6004DDUC3E

Show all 105 cross-references

PEER6004-C3FLT6004NKOYO6004RSNTN6004ZSNR6004NSTEYR6004ZNACHI6004ZZSKF6004-2RS1/C3HT22NSK6004DDUCMPEER6004-RLDFLT6004NRKOYO6004ZNTN6004ZZSNR6004ZSTEYR6004Z/C3SKF6004-2RS1/C3HT51NSK6004DUPEER6004-ZDFLT6004RSKOYO6004ZZNTN6004ZZC3SNR6004ZZSKF6004-2RS1/C3LHT23NSK6004DUCMPEER6004-ZD-C3FLT6004ZSKF6004-2RS1/C3QE6HT51NSK6004VVPEER6004-ZZDFLT6004ZZSKF6004-2RS1/LT20NSK6004ZPEER6004-ZZD-C3SKF6004-2RS1NRNSK6004ZZSKF6004-2RS1/QE6NSK6004ZZC3ESKF6004-2RSHNSK6004ZZC3NS7SKF6004-2RSH/C3SKF6004-2RSH/C3GJNSKF6004-2RSH/C3LHT23SKF6004-2RSHNRSKF6004-2RSJEMSKF6004-2RSLSKF6004-2RSNRSKF6004-2RZSKF6004-2Z/C2SKF6004-2Z/C3SKF6004-2Z/C3LT20SKF6004-2Z/C3QE6SKF6004-2Z/C4SKF6004-2Z/GJNSKF6004-2Z/HT51SKF6004-2ZJEMSKF6004-2Z/LHT23SKF6004-2ZNSKF6004-2ZNRSKF6004/C2SKF6004/C3SKF6004/C3QE6SKF6004/C3S1SKF6004JEMSKF6004NSKF6004NRSKF6004/QE6SKF6004-RSSKF6004-RS1SKF6004-RS1/C2SKF6004-RS1/C3SKF6004-RSHSKF6004-RSJEMSKF6004-ZSKF6004-Z/C3SKF6004-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
6004	Open (No Seal)	CN
6004 C3	Open (No Seal)	C3
6004-2Z	ZZ	CN
6004-2Z C3	ZZ	C3
6004-2RS1	2RS	CN
6004-2RS1 C3	2RS	C3

Related Bearings

Adjacent sizes and cross-series bearings from our catalog.