SKF 6309 2RS C3 45x100x25 mm

SKF 6309 2RS C3 45x100x25 mm - Single-Row Deep Groove Ball Bearing

SKF 6309 2RS C3 is a single-row deep groove ball bearing measuring 45x100x25 mm, manufactured by SKF. It corresponds to the SKF 6309-2RS1/C3 catalogue execution, subject to confirmation of the actual product marking. The bearing belongs to the 63 series and features two contacting elastomer seals and C3 radial internal clearance, greater than Normal. It accommodates radial loads and axial loads in both directions.

Technical Specifications - SKF 6309-2RS1/C3

The specifications above refer to SKF 6309-2RS1/C3. For a bearing commercially described as 6309 2RS C3, the complete manufacturer designation must be confirmed before these values are treated as applicable.

What Does SKF 6309 2RS C3 Mean?

The designation consists of the basic bearing number and suffixes identifying the sealing arrangement and internal clearance.

SKF - Bearing manufacturer.

6 - Single-row deep groove ball bearing.

63 - Dimensional series of deep groove ball bearings.

09 - Bore code corresponding to a nominal bore diameter of 45 mm.

2RS - Common commercial designation for two elastomer seals.

2RS1 - SKF designation identifying contact seals on both sides.

C3 - Radial internal clearance greater than Normal.

The complete manufacturer designation for the identified catalogue execution is:

SKF 6309-2RS1/C3

The slash preceding C3 is part of the SKF designation and should be retained in technical documentation and purchase orders.

SKF 6309 2RS C3 Dimensions

The principal mounting dimensions are:

• Bore diameter d: 45 mm.

• Outside diameter D: 100 mm.

• Width B: 25 mm.

Bearing dimensions: 45x100x25 mm.

The 45 mm bore corresponds to the nominal shaft diameter.

The 100 mm outside diameter determines the nominal housing bore size.

The 25 mm width must be considered when positioning the bearing axially within the assembly.

These dimensions are shared by other 6309 variants that may differ in sealing arrangement and internal clearance.

Construction of SKF 6309-2RS1/C3

SKF 6309-2RS1/C3 is a non-separable, single-row deep groove ball bearing.

Its principal components include:

• Inner ring with a deep groove raceway.

• Outer ring with a deep groove raceway.

• One row of balls.

• Pressed steel cage.

• Two contacting seals.

• Factory grease lubrication.

The deep groove raceway geometry enables the bearing to accommodate primarily radial loads and specified axial loads in both directions.

The seals help protect the bearing interior against contamination and reduce lubricant leakage.

2RS1 Contact Seals - Design and Function

SKF 6309-2RS1/C3 features contact seals on both sides.

These seals perform two principal functions:

• Limiting the entry of contaminants into the bearing.

• Helping retain grease within the bearing.

Compared with non-contact metal shields, contact seals provide a different level of protection against dust and moisture.

However, contact between the sealing lip and its mating surface introduces additional friction.

This must be considered when selecting the permissible operating speed.

Double-sided sealing does not mean that the bearing is suitable for continuous immersion in water or operation under liquid pressure.

C3 Radial Internal Clearance

The C3 suffix is a technically important characteristic of this bearing execution.

It specifies radial internal clearance greater than Normal.

The principal clearance classes can be distinguished as follows:

• C2 - Clearance smaller than Normal.

• CN - Normal clearance.

• C3 - Clearance greater than Normal.

• C4 - Clearance greater than C3.

Internal clearance affects bearing behaviour after mounting and during operation.

An interference fit between a bearing ring and its mating surface can reduce internal clearance.

Temperature differences between the inner and outer rings also influence operating clearance.

C3 clearance may therefore be required under particular mounting and thermal conditions.

However, C3 is not automatically the correct choice for every application.

Load Ratings - SKF 6309-2RS1/C3

For the identified SKF catalogue execution, the following load ratings apply.

Basic dynamic load rating C: 55.3 kN.

This parameter is used when calculating bearing fatigue life under dynamic loading conditions.

Basic static load rating C0: 31.5 kN.

This parameter is used to assess static loading and the risk of permanent deformation at rolling element and raceway contact points.

These ratings do not independently establish the maximum permissible load under every operating condition.

Bearing selection must also account for actual loading, lubrication, rotational speed and required service life.

Limiting Speed - SKF 6309-2RS1/C3

The catalogue limiting speed for this execution is:

4,500 r/min.

Limiting speed is a manufacturer-specified catalogue parameter.

It does not guarantee satisfactory operation at that speed under all loading, lubrication or temperature conditions.

The actual permissible operating speed must also consider bearing load, operating temperature, lubrication and mounting arrangement.

Speed ratings from the open SKF 6309 or the metal-shielded 2Z execution should not be transferred automatically to this sealed variant.

SKF 6309-2RS1/C3 vs Other Bearing Variants

SKF 6309-2RS1/C3 vs SKF 6309-2RS1

Both variants have dimensions of 45x100x25 mm and contact seals on both sides.

The principal difference is radial internal clearance.

SKF 6309-2RS1/C3 - C3 radial internal clearance, greater than Normal.

SKF 6309-2RS1 - Standard execution with Normal internal clearance, CN.

These variants are not automatically interchangeable.

SKF 6309-2RS1/C3 vs SKF 6309-2Z/C3

Both executions have identical principal dimensions and C3 internal clearance.

However, their closure designs differ.

SKF 6309-2RS1/C3 - Two contact seals.

SKF 6309-2Z/C3 - Two non-contact metal shields.

The correct selection depends on environmental conditions, rotational speed and contamination protection requirements.

SKF 6309-2RS1/C3 vs SKF 6309/C3

Both variants have C3 radial internal clearance and dimensions of 45x100x25 mm.

SKF 6309-2RS1/C3 features seals on both sides and factory grease lubrication.

SKF 6309/C3 is an open bearing.

The differences affect lubrication arrangements and protection of the internal bearing components.

Alternative Designations and Search References

Commercial identification variants include:

• SKF 6309 2RS C3

• 6309 2RS C3 SKF

• SKF 6309-2RS C3

• SKF 6309 2RS C3 45x100x25

• SKF 6309-2RS1/C3

• 6309-2RS1/C3 SKF

• SKF6309-2RS1/C3

• SKF 6309 2RS1 C3

For precise identification of the verified SKF execution, use the complete designation:

SKF 6309-2RS1/C3

Commercial naming variants should not replace identification based on the original manufacturer designation.

Bearing Selection and Interchangeability

Before purchasing or replacing the bearing, verify:

• Complete SKF designation.

• Dimensions 45x100x25 mm.

• Contact seals on both sides.

• C3 radial internal clearance.

• Cage construction.

• Dynamic and static load ratings.

• Limiting speed.

• Shaft and housing fits.

• Operating temperature.

• Lubrication conditions.

• Required bearing service life.

A bearing from another manufacturer with identical principal dimensions is not automatically interchangeable.

Maintaining the specified radial internal clearance and sealing arrangement is particularly important.

Typical Applications of 6309 Series Bearings

Single-row deep groove ball bearings with seals on both sides are used in rotating assemblies requiring protection of the internal bearing components against contamination.

Typical applications of this bearing design include:

• Industrial machinery shafts.

• Power transmission assemblies.

• Electric motors with suitable bearing requirements.

• Rotating mechanical systems.

• Bearing arrangements in production equipment.

These are general applications associated with the bearing type, not confirmed original equipment applications for a specific SKF part number.

Mounting and Operation

Before installation, clean the shaft and housing bore seating surfaces.

Verify the required fits and inspect the mounting surfaces.

Mounting force must be applied directly to the bearing ring being installed with an interference fit.

Force must not be transmitted through the balls and raceways.

The seals should not be removed during standard installation.

SKF 6309-2RS1/C3 is factory lubricated with grease.

Store the bearing in its original packaging in a clean, dry environment.

FAQ

What are the dimensions of SKF 6309 2RS C3?

The bearing measures 45x100x25 mm. The bore diameter is 45 mm, the outside diameter is 100 mm and the width is 25 mm.

What does 2RS mean in SKF 6309?

2RS is a common commercial designation for seals on both sides. The identified SKF catalogue execution uses the suffix 2RS1.

What does C3 mean?

C3 specifies radial internal clearance greater than Normal, CN. It is an important factor when selecting mounting fits and assessing thermal operating conditions.

Is SKF 6309-2RS1/C3 factory lubricated?

Yes. The manufacturer specifies grease lubrication for this execution.

Can SKF 6309-2RS1 replace SKF 6309-2RS1/C3?

Not automatically. The variants have different radial internal clearance classes. Substitution requires verification of the specific application requirements.

Is SKF 6309-2Z/C3 equivalent to SKF 6309-2RS1/C3?

Both have identical principal dimensions and C3 clearance, but their closure designs differ. The 2Z version has metal shields, while 2RS1 has contact seals.

What are the load ratings of SKF 6309-2RS1/C3?

The basic dynamic load rating is 55.3 kN, and the basic static load rating is 31.5 kN.

What is the limiting speed of SKF 6309-2RS1/C3?

The manufacturer specifies a limiting speed of 4,500 r/min. Actual operating conditions must also account for loading, temperature and lubrication.

SKF 6309 2RS C3 - Key Information

SKF 6309 2RS C3 is a single-row deep groove ball bearing measuring 45x100x25 mm. The identified SKF 6309-2RS1/C3 execution features two contact seals, C3 radial internal clearance and factory grease lubrication. Its basic dynamic load rating is 55.3 kN, static load rating is 31.5 kN and limiting speed is 4,500 r/min. The bearing accommodates radial and bidirectional axial loads.

SKF 6309 series bearings are offered by the specialist industrial bearing supplier simmering.pl. Stock in Poland, worldwide shipping and technical assistance with identifying the correct SKF bearing execution.