6004 2RS KOYO 20x42x12 - Deep Groove Ball Bearing

6004 2RS KOYO 20x42x12 - Deep Groove Ball Bearing

KOYO 6004 2RS is a single-row deep groove ball bearing with dimensions 20x42x12 mm and contact seals on both sides. The double-sealed design helps retain lubricant inside the bearing while limiting the ingress of dust and external contaminants.

6004 2RS KOYO - Technical Data

6004 2RS KOYO Dimensions

The principal dimensions are:

20x42x12 mm

where:

• d: 20 mm - bore diameter

• D: 42 mm - outside diameter

• B: 12 mm - bearing width

These dimensions are specified by JTEKT for the KOYO 6004 2RS bearing.

6004 Deep Groove Ball Bearing Design

KOYO 6004 2RS is a single-row deep groove ball bearing.

Deep groove ball bearings are primarily designed to accommodate radial loads. Their deep raceway geometry also enables them to accommodate axial loads in both directions within the operating limits of this bearing design.

The 60 series combines compact cross-sectional dimensions with characteristics suitable for a wide range of machinery and industrial bearing arrangements.

What Does 2RS Mean?

The designation:

2RS

identifies a bearing sealed on both sides.

JTEKT classifies the KOYO 6004 2RS as:

Contact Sealed

The seals help to:

• retain lubricant inside the bearing

• limit the ingress of dust and contamination

• protect the raceways and rolling elements

• reduce exposure of the internal bearing components to the external environment

Load Ratings of KOYO 6004 2RS

According to JTEKT technical data:

Basic dynamic load rating Cr: 11.7 kN

Basic static load rating C0r: 5.05 kN

Fatigue load limit Cu: 0.350 kN

Factor:

f0: 13.9

These parameters are relevant when calculating bearing suitability and expected service life in a specific application.

Limiting Speed

For the sealed:

6004 2RS

JTEKT specifies a limiting speed with grease lubrication of:

10,000 rpm

The actual permissible operating speed in a machine also depends on factors such as:

• applied load

• operating temperature

• shaft and housing fits

• lubrication conditions

• alignment

• surrounding components

• overall bearing arrangement

The limiting-speed value for an open 6004 bearing should not automatically be applied to the sealed 6004 2RS version.

Mounting Dimensions

JTEKT specifies the following mounting dimensions for 6004 2RS:

• da min.: 24 mm

• da max.: 25 mm

• Da max.: 38 mm

• ra max.: 0.6 mm

These parameters are useful when designing or checking the shaft and housing shoulders adjacent to the bearing.

Bearing Mass

The reference mass of the KOYO 6004 2RS is approximately:

0.069 kg

or approximately:

69 g

6004 2RS vs 6004 2RS C3

The designation 6004 2RS does not automatically indicate C3 internal clearance.

If greater-than-normal radial internal clearance is required, the bearing designation should include the additional suffix:

C3

Therefore:

6004 2RS

and:

6004 2RS C3

should not be considered identical variants without checking the required internal clearance.

6004 2RS vs 6004 ZZ

Both versions have the same principal dimensions:

20x42x12 mm

but differ in their closure design.

6004 2RS

Uses contact seals on both sides.

6004 ZZ

Uses metal shields on both sides.

The closure design affects protection against contamination, friction and speed characteristics. A replacement should therefore not be selected solely by matching the 20x42x12 mm dimensions.

Alternative Search References

The product can also be searched as:

• 6004 2RS KOYO

• KOYO 6004 2RS

• 6004 2RS 20x42x12

• KOYO 6004 20x42x12

• JTEKT 6004 2RS

• JTEKT 6004

• 6004 KOYO

• 6004 2RS

• 6004 2RS bearing

• 6004 sealed bearing

• 6004 rubber sealed bearing

• 6004 double sealed bearing

• 6004 deep groove ball bearing

• KOYO 6004 deep groove ball bearing

• bearing 6004 20x42x12

• 20x42x12 bearing

• 20x42x12 sealed bearing

Selecting a Replacement for 6004 2RS

Before selecting an alternative to KOYO 6004 2RS, verify:

1. 6004 bearing designation.

2. Bore diameter 20 mm.

3. Outside diameter 42 mm.

4. Width 12 mm.

5. Seals on both sides.

6. Seal type.

7. Required internal clearance.

8. Required load ratings.

9. Operating speed.

10. Temperature and environmental conditions.

Matching the 20x42x12 mm dimensions alone is not sufficient to confirm that two bearing variants are fully interchangeable.

FAQ

What are the dimensions of KOYO 6004 2RS?

KOYO 6004 2RS has dimensions of 20x42x12 mm: 20 mm bore diameter, 42 mm outside diameter and 12 mm width.

What type of bearing is KOYO 6004 2RS?

It is a single-row deep groove ball bearing.

What does 2RS mean on a KOYO 6004 bearing?

2RS identifies a bearing sealed on both sides. JTEKT classifies the 6004 2RS as a contact-sealed bearing.

What is the dynamic load rating of KOYO 6004 2RS?

The basic dynamic load rating Cr is 11.7 kN.

What is the static load rating?

The basic static load rating C0r is 5.05 kN.

What is the fatigue load limit?

The fatigue load limit Cu is 0.350 kN.

What is the limiting speed of KOYO 6004 2RS?

JTEKT specifies a limiting speed of 10,000 rpm with grease lubrication.

How much does KOYO 6004 2RS weigh?

The reference mass is approximately 0.069 kg, or about 69 g.

Does 6004 2RS have C3 clearance?

C3 should not be assumed. The designation 6004 2RS itself does not specify C3 clearance. If greater-than-normal internal clearance is required, it should be identified by the C3 suffix.

Are 6004 2RS and 6004 ZZ the same?

They have the same basic dimensions, but their closure designs differ. 6004 2RS uses contact seals, while 6004 ZZ uses metal shields.

6004 2RS KOYO - Quick Technical Answer

KOYO 6004 2RS is a single-row deep groove ball bearing measuring 20x42x12 mm with contact seals on both sides. According to JTEKT, it has a basic dynamic load rating Cr of 11.7 kN, static load rating C0r of 5.05 kN, fatigue load limit Cu of 0.350 kN and limiting speed of 10,000 rpm. Reference mass is approximately 0.069 kg.

6004 2RS KOYO at simmering.pl

KOYO 6004 2RS 20x42x12 is available from simmering.pl, a specialist B2B supplier of bearings, rotary shaft seals, O-rings and industrial sealing solutions.

Stock and technical service are located in Lublin, Poland, with worldwide shipping available.