6901 2RS KOYO 12x24x6 - Deep Groove Ball Bearing

6901 2RS KOYO 12x24x6 - Deep Groove Ball Bearing

6901 2RS KOYO 12x24x6 mm is a single-row deep groove ball bearing manufactured by JTEKT/Koyo, featuring a compact thin-section design. It has a 12 mm bore diameter, 24 mm outside diameter and 6 mm width. The 2RS version is equipped with contact seals on both sides to protect the bearing interior and retain lubricant. The dynamic load rating Cr is 3.60 kN and the static load rating C0r is 1.45 kN.

Technical Data - 6901 2RS KOYO

6901 2RS KOYO Dimensions

The principal bearing dimensions are:

12x24x6 mm

which means:

• d: 12 mm - bore diameter

• D: 24 mm - outside diameter

• B: 6 mm - bearing width

The 6901 is a compact bearing with a relatively small difference between its bore and outside diameter.

This geometry is characteristic of thin-section deep groove ball bearing series designed for applications where radial installation space is limited.

What Does 6901 Mean?

The designation:

6901

identifies a single-row deep groove ball bearing with dimensions:

12x24x6 mm

The 69 series belongs to compact deep groove ball bearing series with a relatively small radial cross-section.

The 6901 design provides a 12 mm bore while maintaining an outside diameter of only 24 mm.

What Does 2RS Mean on KOYO 6901?

JTEKT/Koyo classifies 6901 2RS as a:

single-row deep groove ball bearing - contact sealed

The bearing therefore has contact seals on both sides.

The 2RS construction helps to:

• protect the raceways and balls against contamination

• reduce the ingress of dust and particles

• retain lubricant inside the bearing

• provide a protected bearing arrangement for many technical applications

Because the seals make contact with the mating bearing surface, their operating characteristics differ from those of non-contact metal shields.

Deep Groove Ball Bearing Design

6901 2RS KOYO is a single-row deep groove ball bearing.

Its basic construction consists of:

• inner ring

• outer ring

• balls

• cage

• seals on both sides

The deep raceways characteristic of this bearing type allow it to accommodate primarily radial loads as well as appropriate axial loads acting in both directions.

Dynamic Load Rating Cr 3.60 kN

The basic dynamic load rating is:

Cr: 3.60 kN

The dynamic load rating is a catalogue parameter used in bearing life calculations under dynamic operating conditions.

It should not be interpreted simply as the maximum load that can be applied to the bearing in every application.

Correct bearing selection also depends on:

• load type and direction

• rotational speed

• required bearing life

• lubrication conditions

• operating temperature

• shaft and housing fits

• contamination

• installation conditions

Static Load Rating C0r 1.45 kN

The basic static load rating is:

C0r: 1.45 kN

This parameter is used when evaluating bearing performance under static loads and very slow rotational or oscillating conditions.

It is not equivalent to the dynamic load rating Cr.

Fatigue Load Limit Cu

JTEKT/Koyo specifies:

Cu: 0.080 kN

for 6901 2RS.

The fatigue load limit is a technical parameter used in advanced bearing life calculations.

It should not be interpreted as the maximum permissible operating load.

Limiting Speed 18,000 rpm

For the:

6901 2RS

JTEKT/Koyo specifies a limiting speed with grease lubrication of:

18,000 rpm

This value applies specifically to the sealed 2RS version.

Open versions of the 6901 bearing have different speed characteristics, so speed values for an open bearing should not be automatically applied to 6901 2RS.

Actual permissible operating speed may also be influenced by load, temperature, fits, lubrication and installation conditions.

Bearing Mass

The reference mass of 6901 2RS KOYO is approximately:

0.011 kg

or approximately:

11 g

Its low mass results from the compact 12x24x6 mm dimensions and thin-section construction.

Mounting Dimensions

JTEKT/Koyo specifies the following reference mounting dimensions for 6901 2RS:

• da min.: 14 mm

• da max.: 14 mm

• Da max.: 22 mm

• ra max.: 0.3 mm

These dimensions are useful when designing shaft and housing shoulders around the bearing.

6901 2RS vs 6901 ZZ

Both bearings have the same principal dimensions:

12x24x6 mm

However, they differ in the type of closure.

6901 2RS

Equipped with contact seals on both sides.

6901 ZZ

Equipped with metal shields on both sides.

The 2RS version is generally selected where increased protection of the bearing interior against contamination is required.

The ZZ version uses a different closure design and may be more appropriate where lower closure-related friction is particularly important.

The two versions should not automatically be considered identical for every application.

6901 2RS vs Open 6901

The open:

6901

does not have seals on both sides.

JTEKT/Koyo specifies different limiting speeds for the open and sealed versions.

Therefore, when considering:

6901 ↔ 6901 2RS

the following factors should be evaluated in addition to the identical principal dimensions:

• contamination protection

• lubrication

• rotational speed

• environmental conditions

• machine design requirements

Applications of 6901 2RS KOYO

Due to its compact dimensions, the 6901 2RS bearing can be used in appropriately designed:

• electric motors

• compact drive systems

• automation equipment

• industrial machinery

• rotating mechanisms

• precision equipment

• technical devices

• workshop equipment

Suitability for a particular application should be determined according to load, speed, required service life, operating temperature, fits and environmental conditions.

How to Select a 6901 2RS Bearing

Before replacing a bearing, verify:

1. 6901 designation.

2. Bore diameter 12 mm.

3. Outside diameter 24 mm.

4. Width 6 mm.

5. 2RS sealing on both sides.

6. Required internal clearance.

7. Radial and axial loads.

8. Rotational speed.

9. Operating temperature.

10. Environmental and contamination conditions.

Matching the 12x24x6 mm dimensions alone does not guarantee complete interchangeability between two bearings.

Alternative Search Terms

The product may also be searched as:

• 6901 2RS KOYO

• KOYO 6901 2RS

• JTEKT 6901 2RS

• 6901 2RS 12x24x6

• 6901-2RS bearing

• 6901 2RS bearing

• 6901 sealed bearing

• 6901 bearing 12x24x6

• 12x24x6 bearing

• 12 mm bore bearing

• KOYO 6901 bearing

• 6901 deep groove ball bearing

• thin-section bearing 12x24x6

• sealed deep groove ball bearing 6901

FAQ

What are the dimensions of 6901 2RS KOYO?

The bearing measures 12x24x6 mm: 12 mm bore diameter, 24 mm outside diameter and 6 mm width.

What type of bearing is 6901 2RS KOYO?

It is a single-row deep groove ball bearing with contact seals on both sides.

What does 2RS mean?

2RS indicates seals on both sides of the bearing. JTEKT/Koyo classifies this version as contact sealed.

What is the dynamic load rating of 6901 2RS KOYO?

The basic dynamic load rating Cr is 3.60 kN.

What is the static load rating?

The basic static load rating C0r is 1.45 kN.

What is the limiting speed of 6901 2RS KOYO?

JTEKT/Koyo specifies a limiting speed of 18,000 rpm with grease lubrication.

How much does 6901 2RS KOYO weigh?

The reference mass is approximately 0.011 kg, or about 11 g.

Do 6901 2RS and 6901 ZZ have the same dimensions?

Yes. Both versions have principal dimensions of 12x24x6 mm, but they use different closure designs.

Does 6901 2RS use contact seals?

Yes. JTEKT/Koyo identifies 6901 2RS as a contact-sealed bearing.

Can 6901 2RS be replaced with an open 6901 bearing?

Not automatically. Although the principal dimensions are identical, the bearings differ in contamination protection, lubrication arrangement and speed characteristics.

6901 2RS KOYO - Quick Technical Answer

6901 2RS KOYO 12x24x6 mm is a single-row deep groove ball bearing with contact seals on both sides. Dynamic load rating Cr is 3.60 kN, static load rating C0r is 1.45 kN, and the grease-lubricated limiting speed is 18,000 rpm. Reference mass is approximately 0.011 kg.

6901 2RS KOYO at simmering.pl

6901 2RS KOYO 12x24x6 is available from simmering.pl, a specialist B2B supplier of JTEKT/Koyo bearings, deep groove ball bearings, industrial bearings and technical sealing solutions.

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