SKF 6305 C3 25x62x17 mm

SKF 6305 C3 25x62x17 mm - Single-Row Deep Groove Ball Bearing

SKF 6305 C3 is a single-row deep groove ball bearing manufactured by SKF, with dimensions of 25x62x17 mm. The full catalogue designation of the standard execution is SKF 6305/C3. The bearing belongs to the 63 series and features one row of balls, an open design without integral shields or seals, and C3 radial internal clearance, greater than Normal. It primarily accommodates radial loads and permissible axial loads in both directions.

Technical Specifications - SKF 6305/C3

The identification data refer to the standard SKF 6305/C3 execution. Detailed operating parameters should be selected using the manufacturer's current documentation for this exact designation.

What Does SKF 6305 C3 Mean?

The bearing designation consists of the basic bearing number and an internal clearance suffix.

SKF - Bearing manufacturer.

6 - Single-row deep groove ball bearing.

63 - Bearing dimensional series.

05 - Bore code corresponding to a nominal bore diameter of 25 mm.

C3 - Radial internal clearance greater than Normal.

The full SKF catalogue designation is:

SKF 6305/C3

The slash preceding C3 is part of SKF's designation format. The complete designation should be retained in purchase orders and technical documentation.

SKF 6305 C3 Dimensions

The principal mounting dimensions are:

• Bore diameter d: 25 mm.

• Outside diameter D: 62 mm.

• Width B: 17 mm.

Bearing dimensions: 25x62x17 mm.

The 25 mm bore corresponds to the nominal shaft diameter.

The 62 mm outside diameter determines the nominal housing bore size.

The 17 mm width must be considered when positioning the bearing rings axially.

Dimensions of 25x62x17 mm are also used by other 6305 bearing executions. Identical dimensions therefore do not automatically establish complete interchangeability.

Construction of SKF 6305/C3

SKF 6305/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.

• Cage maintaining the spacing between the balls.

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

The open design means that the bearing does not have factory-installed metal shields or elastomer seals on either side.

This configuration allows lubricant to be supplied from an external lubrication system.

However, suitable protection against contamination must be provided where required by the operating environment.

C3 Radial Internal Clearance - What Does It Mean?

C3 specifies radial internal clearance greater than Normal, CN.

Radial internal clearance describes the relative radial displacement possible between the bearing rings before mounting, measured under the specified measurement conditions.

The principal clearance classes are:

• C2 - Clearance smaller than Normal.

• CN - Normal clearance.

• C3 - Clearance greater than Normal.

• C4 - Clearance greater than C3.

C3 does not indicate a higher bearing quality grade or precision class.

It identifies an internal clearance range that must be selected according to mounting fits and operating conditions.

Why Is C3 Clearance Used?

Bearing internal clearance can decrease after installation.

The principal influencing factors include:

• Interference fit between the inner ring and shaft.

• Interference fit between the outer ring and housing.

• Temperature differences between the bearing rings.

• Loading conditions during operation.

In certain applications, greater initial clearance helps achieve the required operating clearance after these effects are considered.

However, C3 is not automatically the correct choice for every electric motor or industrial machine.

Radial and Axial Load Accommodation

SKF 6305/C3 is primarily designed to accommodate radial loads.

Its deep groove raceway geometry also enables it to accommodate specified axial loads in both directions.

Correct bearing selection requires consideration of:

• Radial load magnitude.

• Axial load magnitude.

• Direction of applied forces.

• Rotational speed.

• Lubrication conditions.

• Operating temperature.

• Shaft and housing fits.

• Required calculated bearing life.

A standard deep groove ball bearing is not designed to compensate for substantial angular misalignment between the shaft and housing.

SKF 6305/C3 vs Other Bearing Variants

SKF 6305/C3 vs SKF 6305

Both executions have dimensions of 25x62x17 mm and an open design.

They differ in radial internal clearance.

SKF 6305/C3 - Clearance greater than Normal.

SKF 6305 - Normal radial internal clearance, CN.

These variants should not be interchanged without verifying the mounting and thermal requirements.

SKF 6305/C3 vs SKF 6305-2Z/C3

Both variants have dimensions of 25x62x17 mm and C3 internal clearance.

SKF 6305/C3 - Open bearing without shields.

SKF 6305-2Z/C3 - Bearing with two metal shields.

The 2Z execution helps limit contamination and retain grease within the bearing.

The open version requires suitable lubrication and protection within the machine assembly.

SKF 6305/C3 vs SKF 6305-2RS1/C3

Both variants have identical principal dimensions and C3 internal clearance.

SKF 6305/C3 - Open execution.

SKF 6305-2RS1/C3 - Execution with two contact seals.

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

Substitution requires consideration of operating conditions and lubrication arrangements.

SKF 6305/C3 vs SKF 6305/C4

Both executions have identical principal dimensions and an open design.

They differ in radial internal clearance.

C3 - Clearance greater than Normal.

C4 - Clearance greater than C3.

C4 is not automatically an improvement over C3. The correct clearance class depends on the application.

Alternative Designations and Search References

Common commercial identification variants include:

• SKF 6305 C3

• 6305 C3 SKF

• SKF 6305/C3

• 6305/C3 SKF

• SKF 6305 C3 25x62x17

• SKF 6305 C3 ball bearing

• SKF 6305 C3 deep groove ball bearing

The complete manufacturer designation for the standard execution is:

SKF 6305/C3

Bearing Selection and Interchangeability

Before purchasing or replacing the bearing, verify:

• Complete manufacturer designation.

• Dimensions 25x62x17 mm.

• C3 radial internal clearance.

• Open bearing construction.

• Lubricant type and lubrication method.

• Required dynamic and static load ratings.

• Permissible rotational speed.

• Shaft and housing fits.

• Operating temperature.

• Required service life.

A bearing with identical dimensions but a different internal clearance class or sealing arrangement may not be a suitable replacement.

Typical Applications of 6305 Series Bearings

Open single-row deep groove ball bearings can be used in rotating assemblies where suitable lubrication and bearing protection are provided.

Typical applications of this bearing design include:

• Industrial machinery shafts.

• Gearbox assemblies.

• Power transmission systems.

• Electric motors with suitable bearing requirements.

• Rotating mechanical systems.

• Production equipment.

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

Mounting and Operation

Before installation, inspect the shaft, housing and bearing seating surfaces.

Ensure that the mounting fits and alignment are appropriate.

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

Force must not be transmitted through the balls and raceways.

Because SKF 6305/C3 is an open bearing, suitable lubrication and protection against contamination must be provided within the machine assembly.

The lubrication method and maintenance intervals should be selected according to the operating conditions.

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

FAQ

What are the dimensions of SKF 6305 C3?

SKF 6305 C3 measures 25x62x17 mm. The bore diameter is 25 mm, the outside diameter is 62 mm and the width is 17 mm.

What does C3 mean in SKF 6305?

C3 indicates radial internal clearance greater than Normal, CN. This parameter influences bearing behaviour after installation and during operation.

Is SKF 6305/C3 an open bearing?

Yes. The standard SKF 6305/C3 execution does not have factory-installed metal shields or elastomer seals.

Are SKF 6305/C3 and SKF 6305 interchangeable?

Not automatically. Both have identical principal dimensions but different radial internal clearance classes. Selection depends on mounting fits and operating conditions.

Does SKF 6305/C3 require lubrication?

Yes. The open bearing requires suitable lubrication within the machine assembly.

Can SKF 6305-2Z/C3 replace SKF 6305/C3?

Not without verification. The 2Z execution has metal shields, while SKF 6305/C3 is open. This affects contamination protection and lubrication arrangements.

Can SKF 6305/C3 accommodate axial loads?

Yes. Its deep groove ball bearing construction enables it to accommodate specified axial loads in both directions.

Does C3 indicate better bearing quality?

No. C3 identifies the radial internal clearance class, not the quality grade or manufacturing precision of the bearing.

SKF 6305 C3 - Key Information

SKF 6305 C3 is a single-row deep groove ball bearing measuring 25x62x17 mm. The standard SKF 6305/C3 execution features an open design and C3 radial internal clearance, greater than Normal. It accommodates radial loads and permissible axial loads in both directions. Suitable lubrication and protection against contamination must be provided within the machine assembly.

SKF 6305 series bearings are offered by the specialist industrial bearing supplier simmering.pl. Stock in Poland, worldwide shipping and technical assistance with identifying the correct bearing execution.