SKF NUP 2308 ECP 40x90x33 mm - Single-Row Cylindrical Roller Bearing

SKF NUP 2308 ECP 40x90x33 mm - Single-Row Cylindrical Roller Bearing

SKF NUP 2308 ECP is a single-row cylindrical roller bearing with dimensions of 40x90x33 mm, designed primarily for high radial loads. The NUP design has two integral flanges on the outer ring, one integral flange on the inner ring and a loose flange ring on the opposite side. The ECP suffix identifies an optimized SKF internal design with a glass fibre reinforced polyamide cage, roller centred.

Technical data - SKF NUP 2308 ECP

What does SKF NUP 2308 ECP mean?

The complete designation NUP 2308 ECP identifies the bearing design, size and internal execution.

NUP - single-row cylindrical roller bearing design with two integral flanges on the outer ring, one integral flange on the inner ring and a loose flange ring on the opposite side.

23 - dimension series.

08 - bore code corresponding to a nominal bore diameter of 40 mm.

E - optimized SKF internal design for increased load carrying capacity compared with corresponding earlier standard designs.

CP - injection moulded, glass fibre reinforced polyamide cage, roller centred.

The complete designation is technically significant and should not be shortened to 2308 when selecting a replacement.

SKF NUP 2308 ECP dimensions

The principal dimensions are:

• d = 40 mm

• D = 90 mm

• B = 33 mm

Therefore, the bearing measures:

40x90x33 mm

Bore code 08 corresponds to a nominal bore diameter of 40 mm.

When selecting an alternative, both the dimensions and the NUP ECP execution should be verified.

NUP bearing design

The NUP configuration distinguishes this bearing from NU, NJ and N cylindrical roller bearing designs.

The outer ring has two integral flanges.

The inner ring has one integral flange and a loose flange ring on the opposite side.

This arrangement enables the bearing to locate the shaft axially relative to the housing in both directions.

An NUP bearing can therefore be used as a locating bearing in suitable bearing arrangements.

What loads can SKF NUP 2308 ECP accommodate?

Cylindrical roller bearings are primarily designed to accommodate high radial loads.

The line contact between the cylindrical rollers and raceways provides high radial load carrying capability.

The NUP configuration also provides axial location of the shaft in both directions.

Limited axial loads can be accommodated through the interaction between the roller ends and flanges. However, the primary function of this bearing remains the accommodation of radial loads.

NUP 2308 ECP should not be treated as a substitute for a bearing specifically designed for predominantly high axial loads.

E - optimized SKF internal design

The suffix element E identifies an optimized SKF internal design.

Optimized internal geometry enables increased load carrying capability compared with corresponding earlier standard designs.

The E designation is therefore technically significant.

An NUP 2308 ECP should not automatically be treated as identical to another NUP 2308 execution without comparing the complete specification.

CP - glass fibre reinforced polyamide cage

The suffix CP identifies an injection moulded cage made from glass fibre reinforced polyamide.

The cage is roller centred.

Cage material and design can be important when selecting a bearing for specific operating conditions, particularly where temperature and lubricant compatibility must be considered.

A different cage execution should therefore not automatically be substituted for ECP without checking the requirements of the application.

Separable cylindrical roller bearing design

Cylindrical roller bearings have a separable construction that allows certain rings and the roller assembly to be mounted separately.

In the NUP configuration, the loose flange ring is an important part of the complete bearing design.

The separable construction can simplify:

• installation

• removal

• inspection

• mounting where interference fits are required

During assembly, all components belonging to the NUP configuration must be correctly installed.

SKF NUP 2308 ECP vs NU 2308 ECP

These bearings can have the same principal dimensions but perform different axial functions.

NUP 2308 ECP

• two integral flanges on the outer ring

• one integral flange and one loose flange ring associated with the inner ring

• can locate the shaft axially in both directions

NU 2308 ECP

• two integral flanges on the outer ring

• inner ring without flanges

• allows axial displacement of the shaft relative to the housing in both directions

NU and NUP should therefore not be considered functionally identical.

SKF NUP 2308 ECP vs NJ 2308 ECP

NJ 2308 ECP has two integral flanges on the outer ring and one integral flange on the inner ring.

The NJ design can locate the shaft axially in one direction.

NUP 2308 ECP, with its additional loose flange ring, can locate the shaft axially in both directions.

Even when the principal dimensions are identical, the axial locating function is different.

SKF NUP 2308 ECP vs NUP 2308 ECP/C3

The suffix C3 identifies radial internal clearance greater than Normal.

Therefore:

NUP 2308 ECP

and

NUP 2308 ECP/C3

are not automatically identical executions.

Internal clearance should be selected according to shaft and housing fits, operating temperature, speed and other operating conditions.

If the existing bearing carries the C3 suffix, it should not be omitted when ordering a replacement.

Alternative designations and search references

Natural identification variants include:

• SKF NUP 2308 ECP

• NUP 2308 ECP SKF

• SKF NUP2308ECP

• NUP2308ECP SKF

• NUP 2308 ECP 40x90x33

• SKF NUP 2308 ECP 40x90x33

• NUP2308 ECP 40x90x33

• SKF NUP 2308 ECP bearing

• NUP 2308 ECP cylindrical roller bearing

• SKF NUP2308ECP cylindrical roller bearing

• cylindrical roller bearing 40x90x33

For technical documentation and purchasing, the preferred identification is the complete designation:

SKF NUP 2308 ECP

Can another manufacturer's NUP 2308 replace SKF NUP 2308 ECP?

Another manufacturer may offer an NUP 2308 bearing with the same principal dimensions of 40x90x33 mm.

This does not automatically establish complete interchangeability.

Before selecting an alternative, compare:

• complete designation

• NUP configuration

• dimensions 40x90x33 mm

• internal geometry

• radial internal clearance

• cage design and material

• load ratings

• permissible speeds

• precision class

• operating temperature requirements

• lubrication conditions

• requirements of the specific bearing arrangement

Suffix systems used by different bearing manufacturers are not necessarily equivalent.

Typical applications of NUP cylindrical roller bearings

NUP cylindrical roller bearings are used in arrangements requiring high radial load carrying capability together with axial location of the shaft in both directions.

Typical application groups for this bearing design include:

• industrial machinery

• gearboxes

• drive systems

• production machinery

• machine shafts

• bearing arrangements requiring a locating bearing

These are typical applications of the NUP bearing design and do not confirm that SKF NUP 2308 ECP is specified for a particular machine or gearbox.

How to select SKF NUP 2308 ECP

Before purchasing a replacement, check the complete designation on the existing bearing.

The key identification is:

NUP 2308 ECP

together with the dimensions:

40x90x33 mm

Also verify:

• whether NUP, NU or NJ is required

• radial internal clearance

• cage execution

• precision class

• required load capacity

• rotational speed

• operating temperature

• lubrication conditions

• required axial locating function

Identical dimensions do not guarantee identical bearing function.

Mounting SKF NUP 2308 ECP

Before installation, thoroughly clean:

• shaft

• housing bore

• bearing seats

• bearing components

Correct shaft and housing fits should be used for the specific bearing arrangement.

Where an interference fit is present, mounting force should be applied directly to the ring being fitted.

Mounting force should never be transmitted through the cylindrical rollers and raceways.

Because of the separable NUP construction, particular attention should be paid to correct assembly of all components, including the loose flange ring.

Storage

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

Protect it against:

• moisture

• dust

• aggressive substances

• condensation

• mechanical damage to rollers and raceways

The packaging should preferably be opened immediately before installation.

FAQ

What are the dimensions of SKF NUP 2308 ECP?

SKF NUP 2308 ECP measures 40x90x33 mm: 40 mm bore, 90 mm outside diameter and 33 mm width.

What type of bearing is NUP 2308 ECP?

It is a single-row cylindrical roller bearing in the NUP configuration.

What does NUP mean?

NUP identifies a design with two integral flanges on the outer ring, one integral flange on the inner ring and an additional loose flange ring. This arrangement enables axial location of the shaft in both directions.

What does ECP mean in SKF NUP 2308 ECP?

E identifies an optimized SKF internal design. CP identifies an injection moulded, glass fibre reinforced polyamide cage that is roller centred.

Are NUP 2308 ECP and NU 2308 ECP the same bearing?

No. They can have the same principal dimensions but have different flange arrangements and axial functions. NUP can locate the shaft axially in both directions, while NU permits axial displacement in both directions.

Are NUP 2308 ECP and NJ 2308 ECP interchangeable?

Direct interchangeability should not be assumed. NJ provides axial location in one direction, while NUP can locate the shaft in both directions.

Is NUP 2308 ECP/C3 the same execution?

No. The C3 suffix identifies radial internal clearance greater than Normal. If the application requires C3, this suffix should not be omitted.

Can another manufacturer's 40x90x33 mm bearing replace SKF NUP 2308 ECP?

Dimensions alone are insufficient. The NUP configuration, internal clearance, cage, load ratings, speed limits, precision and operating conditions should also be compared.

SKF NUP 2308 ECP - key information

SKF NUP 2308 ECP is a single-row cylindrical roller bearing measuring 40x90x33 mm. The NUP configuration enables axial location of the shaft in both directions. ECP identifies an optimized SKF internal design with a roller-centred, glass fibre reinforced polyamide cage. The bearing is primarily designed to accommodate high radial loads.

Available from simmering.pl with stock in Poland and worldwide shipping. We also assist with SKF bearing identification and selection of suitable NU, NJ, NUP and other cylindrical roller bearing variants.