SKF 23944 CC/W33 220x300x60 mm - Spherical Roller Bearing

Technical Specifications

The nominal dimensions of SKF 23944 CC/W33 are 220x300x60 mm.

The load ratings, speed ratings, and catalogue mass correspond to SKF catalogue information for the specified bearing designation.

Values from other 23944 variants should not automatically be applied to SKF 23944 CC/W33.

What Does SKF 23944 CC/W33 Mean?

The designation identifies the bearing series, bore diameter, internal design, and lubrication arrangement.

23944 - Bearing series and dimensions

The basic designation 23944 identifies a spherical roller bearing with a nominal bore diameter of 220 mm.

The 239 series has a relatively small radial cross-section in relation to its bore diameter.

For SKF 23944 CC/W33, the nominal boundary dimensions are 220x300x60 mm.

This dimensional arrangement may be relevant where radial installation space is limited.

CC - SKF internal design

The CC suffix identifies an SKF spherical roller bearing design incorporating symmetrical barrel-shaped rollers, two window-type steel cages, and a guide ring positioned between the roller rows.

In this construction, the inner ring does not have integral central guide flanges.

The internal arrangement allows the bearing to accommodate radial loads, axial loads in both directions, and angular misalignment.

The CC suffix does not specify C3 radial internal clearance or a particular lubricant.

W33 - Annular lubrication groove and holes

The W33 suffix identifies an annular lubrication groove and three lubrication holes in the outer ring.

These features allow lubricant to be supplied to the bearing through a suitably designed housing.

W33 does not indicate an integrated seal or a factory grease fill intended to last throughout the bearing's service life.

Normal radial internal clearance (CN)

The standard SKF 23944 CC/W33 configuration has normal radial internal clearance (CN).

The CC suffix refers to the bearing's internal construction and must not be confused with the C3 clearance designation.

If increased internal clearance is required, the appropriate variant must be selected according to SKF specifications.

Cylindrical bore and open construction

SKF 23944 CC/W33 has a cylindrical bore with a nominal diameter of 220 mm.

It is an open bearing without integrated seals or shields.

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

Construction and Operating Principle

SKF 23944 CC/W33 consists of an inner ring with two raceways, an outer ring with a common spherical raceway, two rows of symmetrical barrel-shaped rollers, and steel cages.

A guide ring is positioned between the roller rows as part of the CC internal design.

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

This self-aligning capability helps compensate for shaft deflection and misalignment between the shaft and housing, within the manufacturer's permissible limits.

The two rows of rollers accommodate substantial radial loads together with axial loads acting in both directions.

The bearing has a cylindrical bore and an open construction.

Its W33 lubrication arrangement enables lubricant to be introduced through the outer ring when the housing is designed accordingly.

Load Ratings and Operating Speeds

SKF catalogue data for 23944 CC/W33 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 is used to evaluate resistance to permanent deformation under static loading conditions.

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

Reference speed and limiting speed are catalogue values rather than guaranteed operating speeds under all conditions.

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

Lubrication of SKF 23944 CC/W33

The W33 configuration incorporates an annular lubrication groove and three lubrication holes in the outer ring.

This arrangement allows grease or oil to be supplied through the housing when the lubrication system is designed for this purpose.

Because the bearing has an open construction, the surrounding arrangement must protect it against contamination and moisture.

The appropriate lubricant, lubricant quantity, and relubrication interval should be selected according to the application.

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

The W33 suffix does not define a particular grease formulation, lubricant quantity, or relubrication interval.

SKF 23944 CC/W33 vs Other Variants

Different SKF 23944 variants may have the same nominal boundary dimensions but differ in bore geometry, sealing arrangement, or lubrication requirements.

The listed variants belong to the 220x300x60 mm dimensional group.

SKF 23944 CC/W33 has a cylindrical bore, while SKF 23944 CCK/W33 has a tapered bore.

The sealed variant also differs in its sealing construction and operating characteristics.

Identical nominal dimensions do not guarantee direct interchangeability.

The complete designation and the requirements of the bearing arrangement must be checked before substitution.

Alternative Designations and Reference Formats

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

• SKF 23944 CC/W33

• 23944 CC/W33 SKF

• SKF23944CC/W33

• SKF 23944CC/W33

• 23944CC/W33 SKF

The manufacturer's original designation is SKF 23944 CC/W33.

These alternative written formats do not represent separate OEM part numbers.

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

Bearing Selection and Interchangeability

Before purchasing SKF 23944 CC/W33, verify the complete manufacturer designation and the technical requirements of the bearing arrangement.

Important selection criteria include:

• Boundary dimensions: 220x300x60 mm.

• Bore configuration: Cylindrical, 220 mm.

• Internal design: SKF CC with steel cages and a guide ring.

• Radial internal clearance: Normal (CN).

• Lubrication arrangement: W33 annular groove and three outer ring lubrication holes.

• Sealing: Open bearing requiring external protection.

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

• Operating speed: Compatibility with lubrication and temperature.

• Mounting fits: Correct shaft and housing tolerances.

• Angular misalignment: Within the manufacturer's permissible limits.

• Operating temperature: Its influence on clearance and lubricant performance.

When evaluating a bearing from another manufacturer, compare not only its dimensions but also its internal design, load ratings, cage construction, radial clearance, and lubrication features.

Bearings with identical nominal dimensions are not necessarily fully interchangeable.

Applications of SKF 23944 CC/W33

Spherical roller bearings of the 239 series are designed for rotating assemblies requiring substantial radial load capacity and the ability to accommodate angular misalignment.

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

The relatively small radial cross-section of the 239 series may be advantageous where installation space is limited in the radial direction.

The W33 lubrication arrangement can be useful in bearing housings designed to supply lubricant through the outer ring.

These are general applications based on the bearing's construction.

They do not establish that the exact SKF 23944 CC/W33 designation is approved for a particular machine, gearbox, motor, or OEM assembly.

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

Installation and Operating Recommendations

Preparation

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

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

Mounting

When installing the bearing with an interference fit, apply the mounting force to the ring being fitted.

Do not transmit mounting forces through the rollers or raceways.

Use suitable mounting equipment and follow SKF's recommended procedures for cylindrical-bore spherical roller bearings.

Radial internal clearance

Consider the reduction in radial internal clearance caused by interference fits.

The remaining operating clearance must be suitable for the expected load, speed, and temperature conditions.

Lubrication

Where the housing incorporates a compatible lubrication system, lubricant may be supplied through the W33 groove and holes.

Use the lubricant specified for the application and ensure adequate distribution.

Operation and storage

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

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 23944 CC/W33?

SKF 23944 CC/W33 has a bore diameter of 220 mm, an outside diameter of 300 mm, and a bearing width of 60 mm.

What does CC mean in SKF 23944 CC/W33?

CC identifies an SKF internal design with symmetrical barrel-shaped rollers, two window-type steel cages, and a guide ring positioned between the roller rows.

What does W33 mean?

W33 specifies an annular lubrication groove and three lubrication holes in the outer ring. These features allow lubricant to be supplied through a suitably designed housing.

Does SKF 23944 CC/W33 have a tapered bore?

No. SKF 23944 CC/W33 has a cylindrical bore with a nominal diameter of 220 mm. The SKF 23944 CCK/W33 variant has a tapered bore with a 1:12 taper.

What radial internal clearance does SKF 23944 CC/W33 have?

The standard bearing has normal radial internal clearance (CN). The CC suffix identifies the internal design, not increased C3 clearance.

Is SKF 23944 CC/W33 self-aligning?

Yes. The spherical outer ring raceway allows the bearing to compensate for angular misalignment between the shaft and housing, within SKF's specified limits.

Is SKF 23944 CC/W33 sealed?

No. It is an open spherical roller bearing without integrated seals. Appropriate external sealing and lubrication must be provided by the bearing arrangement.

What is the load rating of SKF 23944 CC/W33?

The basic dynamic load rating is 661 kN, the basic static load rating is 1,080 kN, and the fatigue load limit is 93 kN.

SKF 23944 CC/W33 - Key Technical Information

SKF 23944 CC/W33 is a double-row self-aligning spherical roller bearing measuring 220x300x60 mm. The CC suffix identifies an internal design with symmetrical rollers and steel cages, while W33 specifies an annular lubrication groove and three outer ring holes. The bearing has a cylindrical bore, normal radial clearance, and an open construction.

SKF 23944 CC/W33 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.