SKF 6204 2RS C4 20x47x14 mm - Sealed Deep Groove Ball Bearing

SKF 6204 2RS C4 20x47x14 mm - Sealed Deep Groove Ball Bearing

SKF 6204 2RS C4 20x47x14 mm is a single-row deep groove ball bearing with seals on both sides and C4 radial internal clearance. The 6204 bearing size has a 20 mm bore, 47 mm outside diameter and 14 mm width. C4 indicates radial internal clearance greater than C3. For exact SKF identification, the specific factory seal suffix marked on the bearing or packaging should also be verified.

Technical data

Dynamic load rating C, static load rating C0, fatigue load limit Pu, limiting speed, mass, cage material and grease specification are not stated here for this particular SKU because these values should only be assigned after the exact SKF factory designation, including the specific seal suffix, has been confirmed.

What does SKF 6204 2RS C4 mean?

The designation can be divided into several important elements.

SKF - bearing manufacturer.

6204 - basic designation of a single-row deep groove ball bearing. The principal dimensions of SKF 6204 are 20x47x14 mm.

2RS - commonly used commercial terminology for a bearing sealed on both sides. However, this description alone does not precisely identify the specific SKF seal design.

C4 - radial internal clearance greater than C3.

The C4 suffix is technically important and should not be omitted when identifying or selecting a replacement bearing.

SKF factory seal designations

SKF uses its own suffixes to identify specific sealing arrangements.

Depending on the particular 6204 execution and SKF product generation, designations can include versions such as:

• 6204-2RSH

• 6204-2RSL

• 6204-2Z

• 6204-2RS1 in applicable SKF documentation and product generations

These designations should not automatically be treated as synonyms.

For example:

2RSH identifies RSH contact seals on both sides.

2RSL identifies low-friction RSL seals on both sides.

2Z identifies metal shields on both sides.

Therefore, the commercial description 6204 2RS C4 communicates that the bearing is sealed on both sides and has C4 clearance, but it should not automatically be converted to 6204-2RSH/C4 or 6204-2RS1/C4 without checking the actual bearing, packaging or SKF documentation.

SKF 6204 dimensions

The principal dimensions are:

20x47x14 mm

where:

• d = 20 mm - bore diameter

• D = 47 mm - outside diameter

• B = 14 mm - bearing width

These dimensions identify the basic 6204 bearing size.

However, matching dimensions alone do not establish complete interchangeability between different 6204 variants.

Construction of SKF 6204

SKF 6204 belongs to the family of single-row deep groove ball bearings.

The basic construction consists of:

• inner ring

• outer ring

• one row of balls

• cage

• deep raceways

• closures in sealed or shielded variants

Deep groove ball bearings are primarily designed to accommodate radial loads.

Their raceway geometry also enables them to accommodate axial loads in both directions within the operating limits of this bearing type.

What does C4 mean on SKF 6204?

The C4 suffix specifies a radial internal clearance class.

In simplified order, SKF radial internal clearance classes can be represented as:

C2 - smaller than Normal

Normal - normal clearance

C3 - greater than Normal

C4 - greater than C3

C5 - greater than C4

C4 does not indicate a higher quality grade.

It defines a specific, increased initial radial internal clearance intended for bearing arrangements where this clearance class is required by mounting or operating conditions.

Why is C4 clearance important?

The internal clearance measured before mounting is not necessarily the same as the operating clearance of the installed bearing.

Operating clearance can be affected by:

• interference fit of the inner ring on the shaft

• fit of the outer ring in the housing

• temperature differences between the rings

• thermal expansion

• operating conditions of the bearing arrangement

For this reason, C4 should be selected because the bearing arrangement requires it, not simply because it provides more clearance than C3.

SKF 6204 C4 vs SKF 6204 C3

Both variants can have identical principal dimensions:

20x47x14 mm

The important difference is radial internal clearance.

C3 - radial internal clearance greater than Normal.

C4 - radial internal clearance greater than C3.

If a machine requires C4 clearance, a C3 bearing should not automatically be installed merely because its external dimensions are identical.

Likewise, a C4 bearing should not replace C3 without considering the design and operating conditions of the bearing arrangement.

SKF 6204 C4 vs SKF 6204 with Normal clearance

The basic 6204 bearing and a 6204 C4 version can have identical mounting dimensions.

However, their internal clearance differs.

The C4 version has greater initial radial internal clearance.

This difference can become particularly important after installation when interference fits and operating temperatures alter the effective clearance of the bearing.

For this reason, C4 must not be ignored when selecting a replacement.

2RS vs 2Z - seals and shields

A bearing commercially described as 2RS and an SKF 2Z bearing use different closure concepts.

A sealed version uses seals, while 2Z in SKF nomenclature identifies metal shields on both sides.

These closure types can differ in:

• protection against contamination

• friction

• lubricant retention

• permissible operating conditions

A sealed 6204 and a 6204-2Z should therefore not automatically be considered functionally equivalent simply because both have dimensions of 20x47x14 mm.

SKF 6204 2RS C4 vs other 6204 variants

The 6204 family includes several executions sharing the same basic dimensions of 20x47x14 mm.

Examples include:

6204 - open bearing.

6204-2Z - metal shields on both sides.

6204-2RSH - RSH seals on both sides.

6204-2RSL - low-friction RSL seals on both sides.

Different radial internal clearance classes, including C3 and C4, may also be specified.

Identical mounting dimensions therefore do not mean that different 6204 executions have identical construction or operating characteristics.

Can SKF 6204 2RS C4 be replaced by 6204 2RS C3?

Such a substitution should not be assumed without evaluating the application.

C3 and C4 represent different radial internal clearance classes.

If the machine manufacturer specified C4, changing to C3 can alter the operating clearance after mounting and after the bearing reaches operating temperature.

Any change of clearance class should therefore be based on the machine documentation or engineering requirements of the bearing arrangement.

Alternative designations and search references

Natural search and commercial references include:

• SKF 6204 2RS C4

• 6204 2RS C4 SKF

• SKF 6204 2RS/C4

• SKF 6204-2RS/C4

• SKF 6204 C4 2RS

• 6204 2RS C4 20x47x14

• SKF 6204 20x47x14 C4

• SKF 6204 C4 bearing

• 6204 2RS C4 bearing

• 6204 C4 20x47x14 bearing

• sealed 6204 C4 bearing

These variants are useful for commercial identification but should not be interpreted as confirmation of a specific SKF factory seal suffix.

If the bearing or SKF packaging is marked, for example, 6204-2RSH/C4, that complete manufacturer designation should take precedence.

How to select a replacement for SKF 6204 2RS C4

Before selecting a replacement, verify:

• manufacturer

• complete designation marked on the bearing or packaging

• basic designation 6204

• dimensions 20x47x14 mm

• single-row construction

• sealing arrangement

• number of seals

• exact SKF seal design

• C4 radial internal clearance

• precision class, if specified

• cage design, if relevant to the application

• shaft and housing fits

• load conditions

• rotational speed

• operating temperature

• lubrication requirements

The requirements of the specific bearing arrangement should always determine the final selection.

Identical 20x47x14 mm dimensions do not automatically guarantee complete interchangeability.

Typical applications of this bearing type

Single-row deep groove ball bearings are used in a wide variety of rotating bearing arrangements because they can accommodate radial loads and axial loads in both directions.

A version sealed on both sides is intended for arrangements where protection of the bearing interior and lubricant retention are required.

A C4 version is used where the bearing arrangement requires increased initial radial internal clearance.

This does not, however, confirm that this exact SKU is intended for a particular electric motor, pump, gearbox, fan, vehicle or industrial machine. Exact applications should be verified from the equipment manufacturer's documentation.

Installation and operation

Before installation, the shaft, housing and mounting surfaces should be clean and free from contamination.

Verify:

• shaft tolerance

• housing tolerance

• required fit

• C4 clearance requirement

• exact sealing variant

When an interference fit is required, mounting force should be applied directly to the ring being fitted.

Installation force should not be transmitted through the balls and raceways because this can damage the rolling contact surfaces.

The seals should not be damaged or unnecessarily removed during installation.

Bearings should be stored in a clean, dry environment and preferably remain in their original packaging until installation.

FAQ

What are the dimensions of SKF 6204 2RS C4?

The principal dimensions are 20x47x14 mm: 20 mm bore diameter, 47 mm outside diameter and 14 mm width.

What type of bearing is SKF 6204?

SKF 6204 is a single-row deep groove ball bearing.

What does C4 mean?

C4 identifies a radial internal clearance class greater than C3.

Does C4 have more clearance than C3?

Yes. In the SKF clearance classification, C3 is greater than Normal and C4 is greater than C3.

Is C4 better than C3?

No. C3 and C4 are different internal clearance classes for different bearing arrangements and operating conditions. The correct class depends on factors such as fits, temperature and application requirements.

What does 2RS mean?

2RS is commonly used in the bearing market to describe a bearing sealed on both sides. SKF uses more specific seal suffixes, so the exact seal design should be confirmed from the marking on the bearing, packaging or SKF documentation.

Are SKF 6204 2RS C4 and 6204-2Z/C4 the same?

No. 2Z identifies metal shields on both sides, while 2RS is a general commercial description for a sealed bearing. These are different closure concepts.

Can SKF 6204 C4 be replaced by 6204 C3?

Not automatically. C3 and C4 have different radial internal clearance ranges. The required clearance class should be determined by the design and operating conditions of the specific bearing arrangement.

SKF 6204 2RS C4 20x47x14 mm - key information

SKF 6204 2RS C4 is a single-row deep groove ball bearing measuring 20x47x14 mm, commercially specified with seals on both sides and C4 radial internal clearance, which is greater than C3. When selecting a replacement, retain the C4 clearance and verify the exact SKF factory seal suffix marked on the bearing or packaging.

The product is available from the specialist industrial supplier simmering.pl, with stock in Poland and worldwide shipping. Assistance with identifying the exact SKF bearing execution and selecting a suitable replacement is also available.