What Is a Cylindrical Roller Bearing?

A cylindrical roller bearing consists of several main components:

• Inner ring
• Outer ring
• Cylindrical rollers
• Cage
• Raceway surfaces

The rollers have a cylindrical shape and run between the bearing raceways. Depending on the bearing design, the rings and roller arrangement can accommodate different combinations of radial loads and axial displacement.

Cylindrical roller bearings are commonly considered when a machine requires strong radial load support and dependable operation under industrial conditions.

The correct bearing, however, should always be selected according to the machine's operating conditions rather than by dimensions alone.

How Does a Cylindrical Roller Bearing Work?

The operating principle is straightforward.

When a shaft rotates, the inner ring rotates relative to the outer ring. The cylindrical rollers move between the raceways, allowing rotational movement while reducing sliding friction.

The rollers distribute the applied radial load over the raceway.

Basic operating sequence:

1. The shaft rotates.
2. The inner ring rotates with the shaft.
3. Cylindrical rollers move between the raceways.
4. The rollers transfer the applied load.
5. The cage maintains appropriate roller spacing.
6. The bearing allows controlled rotational movement.

This design is particularly useful in industrial equipment where radial loading is an important operating requirement.

Main Features of Cylindrical Roller Bearings

Depending on the specific design and manufacturer, cylindrical roller bearings can provide several useful characteristics.

• High radial load capability: The cylindrical rollers create a relatively large contact area with the raceways, making this bearing family suitable for applications involving substantial radial loads.
• Different internal designs: Cylindrical roller bearings are available in different configurations, including NU and NJ designs. The arrangement of the ribs and rings affects the bearing's ability to accommodate axial movement or axial loads.
• Different cage materials: Depending on the model, cylindrical roller bearings may be supplied with steel or brass cages, among other configurations.
• Different internal clearances: Bearing clearance is an important selection parameter. Common designations include CN/C0-type normal clearance and other specified clearance classes, depending on the bearing manufacturer and model.
• Open bearing designs: Many cylindrical roller bearings are supplied as open bearings, allowing them to be lubricated according to the requirements of the machine.

Types and Designs of Cylindrical Roller Bearings

Cylindrical roller bearings are available in several designs.

• NU Cylindrical Roller Bearings: NU-type bearings are commonly used in applications where radial load support is required and axial displacement between the shaft and housing needs to be accommodated within the bearing arrangement.
  The exact axial capability depends on the bearing design and installation arrangement.
• NJ Cylindrical Roller Bearings: NJ-type cylindrical roller bearings have a different rib arrangement and can provide axial location in one direction in addition to radial load support.
• Single-Row Cylindrical Roller Bearings: Single-row cylindrical roller bearings contain one row of cylindrical rollers.
  They are widely used in industrial machinery where the required load and dimensional conditions can be met by a single-row design.
• Special and Odd-Size Cylindrical Roller Bearings: Some machinery requires bearings outside commonly encountered dimensions.
  Balaji Bearing Co. also deals in odd-size and specialized bearings, making dimensional information especially important when requesting a bearing.

Cylindrical Roller Bearing Specifications

When purchasing a cylindrical roller bearing, several specifications should be checked.

For an exact replacement, it is recommended to verify the complete bearing designation rather than relying only on its dimensions.

Cylindrical Roller Bearing Applications

Cylindrical roller bearings are used across different industrial sectors.

Common applications can include:

• Industrial machinery
• Electric motors
• Gearboxes
• Manufacturing equipment
• Machine tools
• Heavy machinery
• Material-handling equipment
• Automotive-related machinery
• Production equipment
• Specialized mechanical systems

The appropriate bearing depends on the machine's load, speed, temperature, lubrication, mounting arrangement, shaft and housing tolerances, and expected operating conditions.

Practical Example

Suppose an industrial machine has a shaft requiring a bearing with a specific bore and outer diameter.

Instead of selecting a bearing only because the dimensions match, the maintenance team should also verify:

1. Bearing designation
2. Bearing design
3. Internal clearance
4. Load requirements
5. Operating speed
6. Lubrication method
7. Shaft and housing fit
8. Temperature conditions
9. Required axial movement
10. Manufacturer specification

This helps reduce the risk of selecting an unsuitable replacement.

FAG and INA Cylindrical Roller Bearings

Balaji Bearing Co. supplies cylindrical roller bearing models associated with established industrial bearing brands including FAG and INA, based on product availability.

Important examples in our range include:

• FAG NU2226EM1C3
• FAG NU 2313 ECP
• INA SL183038-TB
• INA SL045014-PP-2NR
• INA SL182968

Exact specifications vary by model, so customers should provide the complete bearing number when requesting a quotation.

Our Cylindrical Roller Bearing Range

Below are product details supplied for selected cylindrical roller bearing products.

How to Select the Right Cylindrical Roller Bearing

Selecting a bearing should begin with the application rather than the product name.

1. Check the bore diameter: The bearing bore must correspond to the shaft arrangement.
2. Check the outer diameter: The outer diameter must fit the available housing.
3. Check the width: Confirm that the bearing width matches the available installation space.
4. Identify the bearing design: Determine whether the application requires an NU, NJ or another configuration.
5. Check internal clearance: Operating temperature, fits and application conditions can affect the required internal clearance.
6. Consider speed and load: The bearing should be suitable for the machine's actual radial load and operating speed.
7. Confirm lubrication: Check whether the machine uses oil or grease and whether the bearing is compatible with the selected lubrication method.
8. Verify the complete bearing number: This is particularly important for FAG, INA and other branded bearings because small differences in designation can represent meaningful differences in configuration.

Cylindrical Roller Bearing vs Other Bearing Types

The “best” bearing is not determined by bearing type alone. Selection should be based on the machine's operating conditions and manufacturer specifications.

Installation and Maintenance Considerations

A correctly selected bearing can still experience premature problems if installation and maintenance are poor.

Important practices include:

• Keep bearings clean before installation.
• Avoid contamination from dust, dirt or moisture.
• Use appropriate tools during mounting.
• Do not apply installation force through the wrong bearing ring.
• Verify shaft and housing fits.
• Use the correct lubricant and quantity.
• Check alignment and mounting conditions.
• Monitor abnormal noise, vibration and temperature.
• Follow the bearing manufacturer's installation recommendations.

For critical industrial equipment, bearing replacement should be performed by qualified maintenance personnel.

Frequently Asked Questions

What is a cylindrical roller bearing?

A cylindrical roller bearing is a rolling-element bearing that uses cylindrical rollers between inner and outer raceways. It is primarily used for applications requiring radial load support.

What is a cylindrical roller bearing used for?

Cylindrical roller bearings are used in industrial machinery, motors, gearboxes, manufacturing equipment and other mechanical systems where their load and operating characteristics are suitable.

What is the difference between NU and NJ bearings?

NU and NJ are different cylindrical roller bearing designs. Their rib arrangements differ, which affects how the bearing handles axial movement and axial location. The correct design depends on the machine's bearing arrangement.

What does C3 mean on a cylindrical roller bearing?

C3 is an internal-clearance designation commonly used for bearings with greater internal clearance than the normal clearance class. The appropriate clearance depends on operating conditions, fits and temperature.

What does CN mean in a bearing?

CN generally refers to normal internal clearance for a bearing. The exact designation should be interpreted according to the applicable manufacturer's bearing catalogue.

Are cylindrical roller bearings suitable for heavy loads?

Cylindrical roller bearings can provide substantial radial-load capacity because their rollers create a relatively large contact area. Actual load capacity must be verified using the specific bearing manufacturer's technical data.

Are FAG cylindrical roller bearings available from Balaji Bearing Co.?

Balaji Bearing Co. supplies selected FAG cylindrical roller bearing models, subject to availability. Customers can provide the complete FAG bearing number for specification and quotation confirmation.

Are INA cylindrical roller bearings available?

Yes, Balaji Bearing Co. deals in selected INA roller bearing products, including models listed in the product range above. Availability should be confirmed for the required model.

How do I identify a cylindrical roller bearing?

The most reliable starting point is the complete bearing designation printed on the bearing or packaging. Bore, outer diameter, width, bearing design, clearance and manufacturer should also be checked.

Can you supply odd-size cylindrical roller bearings?

Balaji Bearing Co. specializes in a range of precision-engineered bearings, including odd-size and specialized bearing requirements. Share the bearing number or complete dimensions to check the appropriate product.

What information should I provide when requesting a bearing quotation?

Provide as much of the following information as possible:

• Bearing number
• Brand
• Bore diameter
• Outer diameter
• Width
• Bearing design
• Internal clearance
• Cage type
• Application
• Required quantity

Providing the complete bearing number is usually the fastest way to identify the required product.

Why Choose Balaji Bearing Co.?

Balaji Bearing Co. is a bearing supplier dealing in a broad range of precision-engineered bearing products.

Our product range includes:

• Ball Bearings
• Cylindrical Roller Bearings
• Spherical Roller Bearings
• Taper Roller Bearings
• Four-Row Bearings
• Wheel Bearings
• Odd-Size Bearings
• Specialized Industrial Bearings

We work with industrial and machinery requirements where accurate product identification is important.

For branded or specialized bearings, customers can share the bearing number, dimensions, application and required quantity so that the appropriate product can be checked.

Conclusion

Cylindrical roller bearings are widely used rolling-element bearings designed primarily for radial load applications. Their cylindrical roller construction provides a large contact area and makes them suitable for many industrial machinery applications.

However, choosing the correct bearing requires more than matching the bore size. Bearing design, dimensions, internal clearance, cage type, lubrication, load, speed and installation conditions should all be considered.

Balaji Bearing Co. supplies selected FAG and INA cylindrical roller bearings, along with other industrial bearing types, including spherical, taper, four-row, ball and odd-size bearings.

If you already have a bearing number such as NU2226EM1C3, NU 2313 ECP, SL182968 or another designation, share the complete number with us for product availability and specification confirmation.

Request a Cylindrical Roller Bearing Quote

Looking for a cylindrical roller bearing for industrial machinery?

Send us:

1. Bearing number/model
2. Brand preference
3. Required quantity
4. Bore × outer diameter × width, if the number is unavailable
5. Application or machine type

Contact Balaji Bearing Co. for cylindrical roller bearings, FAG and INA bearing requirements, specialized bearings and industrial bearing solutions.