Discover More About TFL Single Row Cylindrical Roller Bearings
Single row cylindrical roller bearings use one row of cylindrical rollers to support high radial loads. NU and N designs allow axial displacement, while NJ and NUP designs provide different axial locating functions. TFL supplies replacement options across these designs, including bearings with or without an inner ring and matching HJ angle rings. Common applications include industrial motors, gearboxes, pumps and compressors. Bearing distributors can send complete part numbers and quantities for mixed-model quotations, with drawings or mounting details added when needed. TFL supports custom specifications, OEM or neutral packaging, inspection requirements and consolidated shipment. Price, MOQ and lead time are confirmed with the quotation.
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Single Row Cylindrical Roller Bearings Category
The Cage Makes Single Row Cylindrical Roller Bearings More Stable
Errors and Limitations of the Bearing Angle
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Heavy-duty agricultural bearings resist dust and mud, providing long-lasting reliability for tractors and harvesters in tough field operations.
Heavy Equipment (Construction & Mining)
Rugged bearings built to withstand extreme loads, shock, and severe contamination in mining and construction heavy machinery.
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Contact for Compliance DetailsSingle Row Cylindrical Roller Bearing Selection and Sourcing Guide
For replacement enquiries, start with the complete bearing number and quantity. NU and N designs generally allow axial displacement in both directions, NJ provides axial locating support in one direction, and NUP provides locating support in both directions. The rib arrangement, inner-ring configuration, cage and clearance help define the correct replacement.
How to Choose the Bearing Design
Start with the original bearing number and identify whether the bearing position is locating or non-locating. NU and N designs are commonly used where axial movement is required, while NJ, NUP and suitable bearing-and-angle-ring combinations provide different locating functions. Then compare bore, outside diameter, width, cage, clearance and mounting requirements. Bearings with identical boundary dimensions can have different rib arrangements and are not necessarily interchangeable.
Common Designs and Model Options
TFL supplies NU, N, NJ and NUP single row cylindrical roller bearings in different dimensional series and cage configurations. The rib arr
angement determines the bearing’s axial function, while the complete designation identifies the required size and internal design. Load ratings, reference speeds and limiting speeds can be compared in the individual product specifications.
| Design | Typical Axial Function | Key Purchasing Check |
|---|---|---|
| NU | Allows axial displacement in both directions within the bearing. | Confirm the non-locating position and required axial displacement. |
| N | Allows axial displacement in both directions within the bearing. | Confirm the rib arrangement and mounting requirements. |
| NJ | Locates the shaft in one direction and can accommodate limited axial load in that direction. | Confirm the axial load direction and complete designation. |
| NUP | Locates the shaft in both directions. | Confirm the loose flange ring, mounting arrangement and permissible axial load. |
| NJ with a compatible HJ angle ring | Provides locating support in both directions. | Confirm the bearing-and-angle-ring combination and available mounting space. |
Shaft Mounting and Raceway Requirements
For conventional bearing arrangements, TFL supplies single row cylindrical roller bearings with an inner ring. These require the correct shaft fit, shoulders and mounting dimensions.
For bearings without an inner ring, the rollers run directly on a suitably prepared shaft raceway. Raceway hardness, surface finish, geometry and dimensions become part of the bearing specification. These designs use a diameter-under-rollers dimension rather than the standard bore dimension of a complete bearing.
NU and RNU Are Different Configurations
A standard NU bearing includes an inner ring without ribs. An RNU bearing omits the inner ring and requires a suitable shaft raceway. Although the model numbers may look similar, the mounting dimensions and supplied components differ. The complete designation helps avoid ordering the wrong configuration.
When to Specify an HJ Angle Ring
An HJ angle ring provides additional axial guidance when used with a compatible cylindrical roller bearing. For example, a suitable NJ bearing combined with an HJ angle ring can locate the shaft in both directions. This combination is also known as an NH arrangement in SKF-style designations.
For HJ angle ring enquiries, send the bearing number, angle-ring reference and quantity when available. A mounting drawing is helpful if the existing arrangement is unclear. HJ rings are separate accessories, and compatibility must be confirmed for the specific bearing design.
Cage, Clearance and Lubrication Selection
Single row cylindrical roller bearings are available with steel, brass and polymer cage options, depending on the series and internal design. Cage material and guidance method can affect speed, temperature limits and lubricant compatibility. For replacements, the original cage suffix is a useful starting point.
Radial internal clearance also matters. C3 indicates greater radial internal clearance than Normal; it is not a higher precision grade. CN, C3 or other clearance requirements are confirmed according to the original specification and mounting conditions. For NJ, NUP and NJ + HJ arrangements carrying axial loads, the permissible axial load and lubrication at the roller-end and rib contacts must also be considered.
Model Reference Example: NJ 202 ECP
The NJ 202 ECP bearing illustrates the importance of the complete designation. NJ identifies the rib arrangement and one-direction axial locating function. 202 identifies the dimensional series and size, with listed dimensions of 15 × 35 × 11 mm. In this SKF-style reference, EC identifies an optimized internal design, while P indicates a glass-fibre-reinforced PA66 cage. These details help define the required replacement configuration.
Our single-row cylindrical roller bearing structure guide explains the main rib arrangements and their differences in more detail.
Key Information for a Quotation
You do not need to provide every detail before requesting a quote. The complete bearing number and quantity are usually enough to begin. Additional mounting information, drawings or operating requirements help confirm the correct replacement when the original reference is incomplete or a special configuration is required.
| Information | Why It Helps |
|---|---|
| Complete bearing number | Identifies the NU, N, NJ or NUP design, dimensional series and important suffixes. |
| Quantity | Allows price, MOQ and lead time to be confirmed for the requested order. |
| Bore × OD × width | Helps confirm the required dimensions when the original designation is incomplete. |
| With or without inner ring | Distinguishes complete bearings from configurations requiring a shaft raceway. |
| Cage and clearance | Helps match material, internal design and radial clearance requirements. |
| HJ angle ring reference | Needed when the order includes a matching angle ring or a bearing-and-ring combination. |
| Drawing or mounting details | Useful for confirming axial locating function, shaft raceway or special configurations. |
| Packaging requirements | Allows OEM, private-label or neutral packaging to be included in the quotation. |
SKF, FAG and NSK Replacement Notes
TFL supplies alternative bearing options for SKF, FAG and NSK cylindrical roller bearing references. The original part number, including prefixes and suffixes, helps identify the required rib arrangement, dimensions, cage, clearance and internal design. These details are compared with the proposed TFL configuration before the replacement is confirmed.
For NJ bearings used with HJ angle rings, include the ring reference when available. Separable construction makes mounting easier, but it does not mean that rings and roller assemblies from different brands or bearing executions can be freely combined.
Common Applications
Single row cylindrical roller bearings are commonly used in industrial motors, gearboxes, pumps, compressors and other rotating equipment carrying substantial radial loads. NU and N designs are often used in non-locating positions to accommodate thermal expansion, while NJ, NUP and compatible HJ arrangements provide different axial locating functions. Load, speed, alignment, minimum-load and lubrication requirements remain relevant when specifying a new bearing arrangement.
Explore the wider cylindrical roller bearing range for other constructions and bearing types.
Mixed-Model Orders and Distributor Supply
TFL supports bearing distributors, importers and industrial resellers purchasing multiple cylindrical roller bearing designs and related accessories in one order. Send a bearing list or BOM with part numbers and quantities, including any required HJ angle rings or special configurations. The quotation can cover the proposed TFL models, important specification differences, price, MOQ and lead time.
Custom specifications, OEM or neutral packaging, inspection requirements and consolidated shipment can be coordinated for confirmed orders. Model numbers, quantities, visible condition and agreed packing requirements are checked before shipment. Bearings with and without inner rings, together with matching accessories, can be included in a mixed-model enquiry.
Send Your Cylindrical Roller Bearing List
Send the complete bearing numbers and quantities to request a quote. Include HJ angle-ring references, drawings or mounting details when needed to confirm the required configuration.
Send Your Bearing ListSKF, FAG and NSK brand names and part numbers are used only to identify replacement requirements. TFL supplies alternative bearing options and does not imply original-brand manufacture or authorized distribution. Final interchangeability is confirmed against the relevant design, dimensions and product specifications.
FREQUENTLY ASKED QUESTIONS
What are the advantages of single-row cylindrical roller bearings compared to double-row cylindrical roller bearings?
- Simpler structure: Single-row structure has fewer parts, making installation and disassembly easier and reducing costs.
- Better high-speed performance: The single-row structure has less frictional resistance and generates less heat, making it suitable for high-speed applications.
- More suitable for compact spaces: The single-row structure has a smaller width, making it suitable for scenarios with limited axial space.
What materials are general single-row cylindrical roller bearings made of?
What installation methods are generally used for single row cylindrical roller bearings?
- Cold installation: This is suitable for small bearings with a not too tight fit. A sleeve and hammer can be used to gently tap the sleeve to install the bearing in the correct position. During tapping, ensure that the force is evenly distributed on the bearing ring to prevent it from tilting or skewing.
- Hot installation: For larger bearings that require more force to install, hot installation is typically used. By heating the bearing to expand it, it can be more easily installed onto the shaft journal or bearing housing.
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