SKF 22205 EK 25x52x18 mm - Spherical Roller Bearing

Technical Specifications

The dimensions 25x52x18 mm represent the nominal boundary dimensions of the bearing.

Because SKF 22205 EK has a tapered bore, the nominal bore diameter of 25 mm does not indicate a constant diameter along the entire width of the inner ring.

The load ratings, speed ratings, and mass are based on SKF catalogue data for the 22205 EK designation.

What Does SKF 22205 EK Mean?

The designation identifies the bearing series, nominal bore diameter, optimized internal design, and tapered bore configuration.

22205 - Bearing series and dimensions

The basic designation 22205 identifies a double-row spherical roller bearing with nominal dimensions of 25x52x18 mm.

The bearing incorporates two rows of barrel-shaped rollers, enabling it to accommodate radial loads together with axial loads in both directions.

E - Optimized SKF internal design

The E suffix identifies SKF's optimized spherical roller bearing internal design.

This construction incorporates symmetrical rollers and pressed steel cages, with internal geometry developed to increase load-carrying capacity.

The E suffix does not specify radial internal clearance, lubricant type, or operating temperature.

K - Tapered bore with a 1:12 taper

The K suffix identifies a tapered bore with a 1:12 taper.

SKF 22205 EK can be mounted directly on a suitable tapered shaft seat or using an appropriate bearing sleeve.

As the inner ring is driven onto the tapered mounting surface, it expands and the radial internal clearance decreases.

The mounting procedure must therefore control either axial drive-up or radial clearance reduction according to SKF's instructions.

Normal radial internal clearance (CN)

SKF 22205 EK has normal radial internal clearance (CN) unless an additional clearance suffix specifies otherwise.

A C3 variant has greater initial radial internal clearance.

These configurations should not be considered automatically interchangeable because their residual operating clearance may differ after mounting.

Open bearing construction

SKF 22205 EK does not have integrated seals or shields.

The surrounding bearing arrangement must provide appropriate lubrication and protection against contamination and moisture.

Construction and Operating Principle

SKF 22205 EK consists of an inner ring with two raceways, an outer ring with a common spherical raceway, two rows of symmetrical barrel-shaped rollers, and pressed steel cages.

The spherical outer ring raceway allows the inner ring and roller assembly to align at a limited angle relative to the housing.

This self-aligning function helps compensate for shaft deflection and misalignment between the shaft and housing.

The two rows of rollers allow the bearing to accommodate radial loads and axial loads acting in both directions.

An important feature of the EK configuration is its tapered inner ring bore.

This affects the selection of mounting components and the method used to achieve the required fit and residual radial internal clearance.

Load Ratings and Operating Speeds

SKF catalogue data for 22205 EK specifies the following performance parameters.

The basic dynamic load rating is used in bearing life calculations under dynamic loading conditions.

The basic static load rating relates to resistance against permanent deformation under static loading conditions.

The fatigue load limit is used in SKF bearing life calculations.

Reference speed and limiting speed are catalogue values, not guaranteed operating speeds under all conditions.

Actual permissible operating speed depends on lubrication, load, temperature, heat generation, and the complete bearing arrangement.

Lubrication of SKF 22205 EK

SKF 22205 EK incorporates design features that facilitate relubrication.

The following dimensions are reported in the detailed product specifications.

The bearing has an open construction without integrated seals.

It should not be assumed to contain a lifetime grease fill.

The appropriate lubricant, lubrication method, and relubrication interval must be selected according to the operating conditions.

Relevant factors include rotational speed, bearing load, temperature, contamination, and the housing lubrication system.

SKF 22205 EK vs Other Variants

Different versions of the SKF 22205 series may have identical nominal boundary dimensions while differing in bore configuration or radial internal clearance.

These variants have nominal dimensions of 25x52x18 mm but differ in bore geometry or internal clearance.

SKF 22205 E and SKF 22205 EK are not directly interchangeable without checking the shaft mounting arrangement.

Similarly, replacing SKF 22205 EK with a C3 version requires evaluation of the residual operating clearance after mounting.

Alternative Designations and Reference Formats

The following natural reference formats may be used to identify the bearing:

• SKF 22205 EK

• 22205 EK SKF

• SKF22205EK

• SKF 22205EK

• 22205EK SKF

The manufacturer's original designation is SKF 22205 EK.

No unverified OEM references or cross-manufacturer equivalents have been assigned.

Bearing Selection and Interchangeability

Before purchasing SKF 22205 EK, verify the complete designation, dimensions of 25x52x18 mm, tapered bore configuration, and required radial internal clearance.

Important selection criteria include:

• Bore geometry: K specifies a tapered bore rather than a cylindrical bore.

• Mounting arrangement: Directly on a suitable tapered shaft seat or using an appropriate bearing sleeve.

• Residual clearance: The reduction in radial internal clearance during mounting must be controlled.

• Load requirements: Magnitude and direction of radial and axial forces.

• Operating speed: Compatibility with lubrication and thermal conditions.

• Temperature: Its effect on the operating clearance and lubricant performance.

• Internal construction: SKF E design with two rows of symmetrical rollers.

• Housing protection: Suitable sealing arrangements for the open bearing.

• Lubrication: Appropriate lubricant and adequate lubricant supply.

Bearings from different manufacturers may share identical nominal dimensions while differing in internal geometry, cage design, load ratings, and operating characteristics.

Identical dimensions alone do not guarantee full technical interchangeability.

Applications of SKF 22205 EK

Double-row spherical roller bearings are designed for rotating assemblies requiring radial load capacity together with the ability to accommodate angular misalignment.

Typical applications for this bearing category include industrial shaft supports, mechanical power transmission arrangements, and bearing units subjected to shaft deflection.

The tapered bore configuration is suitable for mounting arrangements using compatible tapered shaft seats or bearing sleeves.

These are general applications based on the construction of spherical roller bearings.

They do not establish that the exact SKF 22205 EK designation is approved for a particular machine, gearbox, motor, or OEM assembly.

Suitability must be confirmed against the equipment manufacturer's specifications and actual operating conditions.

Installation and Operating Recommendations

Preparation

Before installation, clean the shaft, sleeve, housing, and bearing mounting surfaces.

Check the dimensions, fits, and condition of all mating components.

Tapered bore mounting

When mounting SKF 22205 EK on a tapered seat or suitable sleeve, monitor radial clearance reduction or axial drive-up according to SKF's recommended procedure.

Driving the bearing farther onto the tapered surface expands the inner ring and reduces its internal clearance.

Excessive drive-up can result in insufficient residual clearance and bearing damage.

Do not use an assumed universal axial displacement value without considering the initial clearance and the selected mounting method.

Mounting forces

Use appropriate mounting tools.

Do not transmit mounting forces through the rollers or raceways.

Lubrication and operation

Provide the lubricant specified for the application.

Ensure adequate lubricant distribution and protection against contamination.

During operation, monitor bearing temperature, vibration, and lubrication condition as appropriate.

Storage

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

Protect it against moisture, contamination, impacts, and mechanical damage.

Frequently Asked Questions - FAQ

What are the dimensions of SKF 22205 EK?

SKF 22205 EK has a nominal bore diameter of 25 mm, an outside diameter of 52 mm, and a bearing width of 18 mm.

What does E mean in SKF 22205 EK?

The E suffix identifies SKF's optimized internal spherical roller bearing design, developed for increased load-carrying capacity.

What does K mean in SKF 22205 EK?

The K suffix identifies a tapered bore with a 1:12 taper. This feature determines the appropriate mounting method.

Is SKF 22205 EK self-aligning?

Yes. The common spherical outer ring raceway allows the bearing to accommodate angular misalignment between the shaft and housing.

What radial internal clearance does SKF 22205 EK have?

The standard bearing has normal radial internal clearance (CN). Mounting on a tapered seat reduces the internal clearance.

What is the difference between SKF 22205 E and SKF 22205 EK?

SKF 22205 E has a cylindrical bore, while SKF 22205 EK has a tapered bore with a 1:12 taper. Both have nominal dimensions of 25x52x18 mm but require different mounting arrangements.

Is SKF 22205 EK sealed?

No. It is an open spherical roller bearing without integrated seals and has features that facilitate relubrication.

What is the load rating of SKF 22205 EK?

The basic dynamic load rating is 49.9 kN, the basic static load rating is 44 kN, and the fatigue load limit is 4.75 kN.

SKF 22205 EK - Key Technical Information

SKF 22205 EK is a double-row self-aligning spherical roller bearing measuring 25x52x18 mm. The E suffix identifies SKF's optimized internal design, while K specifies a tapered bore with a 1:12 taper. The bearing has normal radial internal clearance and an open construction. It accommodates radial and bidirectional axial loads while compensating for angular misalignment.

SKF 22205 EK at simmering.pl

SKF spherical roller bearings and other industrial bearing components are available through simmering.pl, a specialist supplier of rolling bearings, industrial seals, and mechanical components.

We serve industrial companies, maintenance departments, workshops, and technical purchasing teams.

Our warehouse and order processing facilities are located in Lublin, Poland. We provide worldwide shipping from stock in Poland.

Assistance with bearing identification and selection is available based on complete manufacturer designations and application requirements.