SKF C 2211 TN9 55x100x25 - CARB Toroidal Roller Bearing

Technical Specifications - SKF C 2211 TN9

The listed load ratings, speeds, mass and axial displacement are catalogue values for SKF C 2211 TN9. Permissible axial displacement must be evaluated according to the actual ring position, misalignment and mounting conditions. Catalogue speeds do not represent guaranteed operating speeds for every application.

What Does SKF C 2211 TN9 Mean?

C - CARB Bearing Design

The letter C at the beginning of the designation identifies SKF's CARB toroidal roller bearing family.

CARB bearings incorporate specially profiled rollers operating between correspondingly shaped raceways.

This construction enables the bearing to:

• Accommodate substantial radial loads.

• Compensate for angular misalignment between the shaft and housing.

• Allow relative axial displacement between the bearing rings.

A CARB bearing is not designed to locate the shaft axially.

2211 - Bearing Series and Size

The designation 2211 identifies the bearing size within the C 22 series.

For SKF C 2211 TN9, the principal dimensions are:

• d = 55 mm.

• D = 100 mm.

• B = 25 mm.

These dimensions alone are not sufficient to establish interchangeability with another bearing.

TN9 - Glass Fibre Reinforced Polyamide Cage

The SKF suffix TN9 identifies a cage manufactured from glass fibre reinforced polyamide.

The cage separates and guides the rolling elements during operation.

Its material properties must be considered when evaluating operating temperature, lubricant compatibility and application conditions.

Internal Clearance Designation

The designation C 2211 TN9 does not include the additional clearance suffix /C3 or /C4.

It must not be treated as identical to C 2211 TN9/C3 or C 2211 TN9/C4.

The required operating clearance depends on mounting fits, temperature differences and the bearing arrangement.

Cylindrical Bore

SKF C 2211 TN9 has a cylindrical bore.

It is not the tapered-bore version identified by the suffix K.

Construction and Operating Principle of the CARB Bearing

Inner and Outer Rings

SKF C 2211 TN9 consists of an inner ring and an outer ring with specially profiled raceways.

Their geometry is designed to operate with toroidal rolling elements.

The bearing can accommodate angular misalignment and relative axial displacement within its internal geometry.

Toroidal Rollers

The rolling elements have a specialised profile that differs from conventional cylindrical rollers.

Their geometry, together with the raceways, allows the bearing to accommodate changes in the relative position of the rings.

This is a defining characteristic of the CARB bearing concept.

TN9 Cage

The glass fibre reinforced polyamide cage maintains the spacing and guidance of the rollers.

This design should not be confused with the full complement V version, which does not use a conventional cage.

Open Bearing Construction

SKF C 2211 TN9 is supplied as an open bearing without integrated metal shields or elastomeric seals.

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

What Loads Can SKF C 2211 TN9 Accommodate?

Radial Loads

CARB toroidal roller bearings are designed primarily to carry radial loads.

For SKF C 2211 TN9:

• Basic dynamic load rating C: 116 kN.

• Basic static load rating C0: 114 kN.

• Fatigue load limit Pu: 13.4 kN.

These values are used in bearing life calculations and load assessment according to the relevant calculation methods.

They must not be interpreted as universally permissible operating loads under all conditions.

Axial Loads

SKF C 2211 TN9 is not intended to carry external axial loads or provide axial shaft location.

In a typical bearing arrangement, the CARB bearing functions as the non-locating support, while another bearing determines the axial position of the shaft.

Angular Misalignment

The toroidal bearing design can accommodate angular misalignment between the inner and outer rings.

This is particularly relevant when shaft deflection or housing deformation changes the relative alignment of the bearing rings.

The permissible misalignment depends on the operating conditions and bearing arrangement.

Axial Displacement in SKF C 2211 TN9

One of the most important characteristics of CARB bearings is their ability to accommodate axial displacement internally.

The inner and outer rings can move axially relative to each other without requiring one of the rings to slide within its mounting seat.

For SKF C 2211 TN9, the catalogue axial displacement capability from the central position is up to 8.6 mm.

This characteristic is particularly useful in arrangements affected by:

• Thermal expansion of shafts.

• Changes in the axial position of mechanical components.

• Shaft deflection.

• Housing deformation.

• Angular misalignment.

• The need for a non-locating bearing support.

The permissible displacement depends on the initial position of the rings, angular misalignment and available internal clearance.

The catalogue value must therefore be evaluated in relation to the complete bearing arrangement.

Why Is a CARB Bearing Used as a Non-Locating Bearing?

Many industrial shafts are supported by two bearing positions.

One bearing position locates the shaft axially, while the other must accommodate changes in shaft length.

In this arrangement, SKF C 2211 TN9 can serve as the non-locating bearing.

Axial displacement occurs inside the bearing rather than through sliding movement between a bearing ring and its housing seat.

This makes it possible to design bearing arrangements with appropriately selected ring fits while still accommodating thermal expansion.

The locating bearing must be selected separately, and the total expected axial displacement must be considered during design.

SKF C 2211 TN9 vs Other Bearing Variants

C 2211 TN9 vs C 2211 TN9/C3

Both bearings have the same principal dimensions of 55x100x25 mm and use the TN9 cage design.

The /C3 version has greater internal clearance than the normal clearance version.

The two variants should not be interchanged without checking the application requirements.

C 2211 TN9 vs C 2211 KTN9

C 2211 TN9 has a cylindrical bore.

C 2211 KTN9 is the tapered-bore version.

This difference directly affects the mounting method and shaft arrangement.

C 2211 TN9 vs C 2211 V

The TN9 version incorporates a glass fibre reinforced polyamide cage.

The V version is a full complement bearing without a conventional cage.

These versions differ in internal construction, load-carrying characteristics and speed capabilities.

They are not automatically interchangeable.

Alternative Designations and Search References

The product may be encountered under the following written forms:

• SKF C 2211 TN9

• C 2211 TN9 SKF

• C2211 TN9 SKF

• C2211TN9 SKF

• SKF C2211TN9

These are variations in the written presentation of the same designation, not different bearing constructions.

The complete SKF catalogue designation is C 2211 TN9.

C 2211 TN9/C3, C 2211 KTN9 and C 2211 V must not be treated as alternative spellings of the same product.

Typical Applications of CARB Toroidal Roller Bearings

CARB bearings are commonly used as non-locating shaft supports in industrial bearing arrangements requiring radial load capacity and compensation for axial displacement.

Typical applications for this bearing design include:

• Industrial drive shafts.

• Bearing arrangements exposed to thermal expansion.

• Mechanical assemblies subject to shaft deflection.

• Locating and non-locating bearing arrangements.

• Industrial machinery requiring angular misalignment accommodation.

These are general applications based on the technical characteristics of CARB bearings.

They do not establish confirmed installation of SKF C 2211 TN9 in any specific machine model.

Industrial Shaft Support

CARB bearings can support rotating shafts while accommodating axial changes caused by thermal expansion.

This function is important in applications where the shaft length changes during operation.

Bearing Arrangements with Shaft Deflection

The ability to accommodate angular misalignment can be beneficial where mechanical loads cause shaft deflection.

Correct bearing selection requires an assessment of load distribution and operating conditions.

Non-Locating Bearing Positions

SKF C 2211 TN9 is designed for applications where radial support is required without axial shaft location.

The complete arrangement must include a suitable locating bearing.

Selection and Interchangeability of SKF C 2211 TN9

Before ordering, verify:

1. Complete designation SKF C 2211 TN9.

2. CARB toroidal roller bearing construction.

3. Bore diameter of 55 mm.

4. Outside diameter of 100 mm.

5. Bearing width of 25 mm.

6. Cylindrical bore.

7. TN9 cage construction.

8. Required internal clearance.

9. Radial operating load.

10. Rotational speed.

11. Required axial displacement.

12. Angular misalignment.

13. Lubrication conditions.

14. Operating temperature and cage requirements.

15. Locating or non-locating function in the bearing arrangement.

Can a Spherical Roller Bearing with the Same Dimensions Replace SKF C 2211 TN9?

Interchangeability must not be assumed.

CARB toroidal roller bearings and conventional spherical roller bearings differ in their axial load-carrying behaviour and ability to accommodate axial displacement.

A replacement requires an engineering assessment of the complete bearing arrangement.

Can Another Manufacturer's Bearing Replace SKF C 2211 TN9?

An alternative may be considered only after verifying equivalent construction, dimensions, load ratings, internal clearance, cage design and permissible axial displacement.

Matching dimensions of 55x100x25 mm alone do not establish technical equivalence.

Installation and Operation of SKF C 2211 TN9

Clean Installation Conditions

Install the bearing in a clean environment.

Protect the raceways and rolling elements against dust, dirt and other contaminants.

Check Shaft and Housing Fits

Before installation, verify the shaft and housing dimensions and the required interference or clearance fits.

Correct Application of Mounting Force

Apply the mounting force to the ring being installed with an interference fit.

Do not transmit mounting force through the rolling elements and raceways.

Axial Positioning

Consider the initial axial position of the rings and the expected displacement during operation.

Incorrect initial positioning may reduce the available axial displacement capacity.

Lubrication

SKF C 2211 TN9 is an open bearing and requires suitable lubrication within the bearing arrangement.

The lubricant type, quantity and relubrication intervals must be selected according to the operating conditions.

Storage

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

Protect it from moisture, corrosion and mechanical damage before installation.

Frequently Asked Questions - SKF C 2211 TN9

What Are the Dimensions of SKF C 2211 TN9?

The bearing has a bore diameter of 55 mm, an outside diameter of 100 mm and a width of 25 mm.

Is SKF C 2211 TN9 a Spherical Roller Bearing?

No. It is a CARB toroidal roller bearing. Although it can accommodate angular misalignment, it also permits internal axial displacement between the rings, which distinguishes it from conventional spherical roller bearings.

What Does TN9 Mean in SKF C 2211 TN9?

TN9 identifies a glass fibre reinforced polyamide cage.

Can SKF C 2211 TN9 Carry Axial Loads?

It is not designed to carry external axial loads or locate a shaft axially. Its primary function is radial load support in a non-locating bearing position.

Are C 2211 TN9 and C 2211 TN9/C3 the Same Bearing?

No. The /C3 variant has increased internal clearance. The correct version must be selected according to the bearing arrangement and operating conditions.

Does SKF C 2211 TN9 Have a Tapered Bore?

No. SKF C 2211 TN9 has a cylindrical bore. The tapered-bore version is designated C 2211 KTN9.

Is SKF C 2211 TN9 Sealed?

No. It is an open bearing without integral seals or shields. Suitable lubrication and external contamination protection must be provided.

What Are the Load Ratings of SKF C 2211 TN9?

The basic dynamic load rating C is 116 kN, and the basic static load rating C0 is 114 kN.

SKF C 2211 TN9 - Quick Technical Overview

SKF C 2211 TN9 is a single-row CARB toroidal roller bearing measuring 55x100x25 mm, featuring a cylindrical bore and a glass fibre reinforced polyamide TN9 cage. It accommodates radial loads, angular misalignment and internal axial displacement. The bearing is intended for non-locating shaft support rather than axial shaft location.

SKF C 2211 TN9 at simmering.pl

SKF C 2211 TN9 is available to order from simmering.pl, a specialist supplier of industrial bearings, rotary shaft oil seals and technical replacement components.

We serve manufacturing companies, maintenance departments, machinery service providers and B2B customers.

Our warehouse and order processing operations are located in Lublin, Poland.

We supply customers throughout Poland and the European Union and offer worldwide shipping.

We assist customers in identifying SKF bearings by complete manufacturer designation, dimensions, construction and operating requirements.