23030EJW33 TIMKEN 150x225x56 mm Spherical Roller Bearing

23030EJW33 TIMKEN 150x225x56 mm Spherical Roller Bearing

23030EJW33 TIMKEN 150x225x56 mm is a double-row spherical roller bearing with a cylindrical bore, EJ steel cage and W33 lubrication feature. Its self-aligning design helps accommodate shaft-to-housing misalignment and shaft deflection. The bearing is designed primarily for high radial loads while also accommodating axial loads in both directions.

Technical data - TIMKEN 23030EJW33

What does 23030EJW33 mean?

The complete designation:

23030EJW33

identifies a specific TIMKEN spherical roller bearing execution.

The principal elements of the designation are:

• 23030 - basic spherical roller bearing designation
• EJ - TIMKEN steel cage design
• W33 - lubrication feature
• TIMKEN - manufacturer

The absence of the letter K is also technically important.

TIMKEN 23030EJW33 has a cylindrical bore, not a tapered bore.

Dimensions of TIMKEN 23030EJW33

The principal dimensions are:

150x225x56 mm

where:

• d = 150 mm - bore diameter
• D = 225 mm - outside diameter
• B = 56 mm - bearing width

TIMKEN also specifies installation-related dimensions including:

• maximum fillet radius = 2 mm
• shaft backing diameter da = 169 mm
• housing backing diameter Da = 210 mm

These dimensions should be considered when checking the shaft, housing and adjacent components.

Double-row spherical roller bearing

23030EJW33 is a double-row spherical roller bearing.

Two rows of barrel-shaped rollers operate against a common spherical raceway in the outer ring.

This geometry provides the self-aligning capability characteristic of spherical roller bearings.

The design enables the bearing to:

• accommodate high radial loads
• accommodate axial loads in both directions
• operate under combined loading
• compensate for shaft-to-housing misalignment
• accommodate certain shaft deflections

These characteristics make spherical roller bearings suitable for demanding industrial bearing arrangements.

Cylindrical bore - important feature

TIMKEN 23030EJW33 has a cylindrical bore.

This is important when selecting a replacement.

The designation:

23030EJW33

should not be confused with:

23030KEJW33

The letter K identifies a tapered-bore version.

Therefore, 23030EJW33 and 23030KEJW33 should not automatically be considered interchangeable even though they belong to the same basic bearing size.

The required mounting arrangement must be checked before replacement.

What does EJ mean?

EJ identifies a specific TIMKEN spherical roller bearing design with a steel cage.

For 23030EJW33:

Cage type: EJ

Cage material: steel

The cage maintains appropriate roller spacing and contributes to correct roller guidance during operation.

The exact cage design is an important part of the bearing specification and should be considered when comparing alternative bearing executions.

What does W33 mean?

W33 identifies a lubrication-related feature of the bearing.

It supports lubricant supply and distribution within the spherical roller bearing and is particularly relevant in industrial applications where periodic relubrication is required.

The correct lubricant type, quantity and relubrication interval should be selected according to:

• operating speed
• bearing load
• operating temperature
• contamination conditions
• mounting arrangement
• machine manufacturer's requirements
• TIMKEN lubrication recommendations

W33 is therefore an important technical feature and should remain part of the complete product designation.

Self-aligning capability

One of the principal advantages of 23030EJW33 is its self-aligning spherical roller bearing construction.

The spherical outer-ring raceway allows the inner-ring and roller assembly to align relative to the outer ring.

This helps the bearing accommodate certain levels of:

• shaft-to-housing misalignment
• shaft deflection
• mounting inaccuracies
• structural deflection during operation

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

Self-alignment should not be used as a substitute for correct machine alignment and installation.

Radial and axial loads

Spherical roller bearings are designed primarily for high radial loads.

Their internal geometry also enables them to accommodate axial loads in both directions.

This makes 23030EJW33 suitable for bearing arrangements exposed to:

• high radial loading
• combined radial and axial loading
• reversing axial forces
• shock or variable loads when permitted by the application design

Actual bearing performance depends on load magnitude, load direction, speed, lubrication, internal clearance, fits and operating temperature.

Load ratings of TIMKEN 23030EJW33

TIMKEN specifies:

Dynamic radial load rating C1: 621 kN

Static radial load rating C0: 911 kN

These are catalogue engineering values used in bearing selection and life calculations.

They should not be interpreted as universal maximum permissible machine loads.

Bearing selection must consider the complete operating conditions and the required service life.

Calculation factors

TIMKEN specifies the following factors for 23030EJW33:

• e = 0.21
• Y0 = 3.07
• Y1 = 3.14
• Y2 = 4.68
• Cg = 0.0856

These values are used in engineering calculations according to the manufacturer's methodology.

For accurate bearing life calculations, actual radial and axial loads, rotational speed, lubrication, contamination, temperature and mounting conditions must be considered.

Speed data for TIMKEN 23030EJW33

TIMKEN specifies:

Thermal Reference Speed - oil: 2600 rpm

Thermal Reference Speed - grease: 2200 rpm

These are manufacturer reference values.

They should not automatically be interpreted as maximum permissible continuous operating speeds in every application.

Actual operating speed capability depends on factors including:

• bearing load
• operating temperature
• lubricant
• lubrication method
• shaft and housing fits
• internal clearance
• heat dissipation
• environmental conditions

23030EJW33 vs 23030KEJW33

The primary difference is the bore design.

23030EJW33

• cylindrical bore
• 150 mm bore diameter

23030KEJW33

• tapered bore
• intended for an appropriate tapered mounting arrangement

The K suffix is therefore technically significant.

A cylindrical-bore bearing should not automatically be replaced by a tapered-bore version or vice versa.

23030EJW33 vs 23030EJW33C3

The designation:

23030EJW33C3

identifies a version with increased C3 internal clearance.

The designation:

23030EJW33

does not contain the C3 suffix.

Therefore, C3 clearance should not be assumed for 23030EJW33 unless specifically confirmed for the supplied bearing.

When selecting a replacement, the required internal clearance class must be checked.

23030 EJ vs 23030 EM

TIMKEN spherical roller bearings may be available in different internal and cage executions, including EJ and EM designs.

EJ and EM should not be treated as meaningless additions to the basic 23030 designation.

They identify different bearing executions.

When selecting a replacement, compare the complete designation and relevant technical parameters rather than relying solely on the dimensions 150x225x56 mm.

Internal clearance

Internal clearance is an important parameter in large spherical roller bearing applications.

The correct clearance depends on factors such as:

• shaft interference fit
• housing fit
• operating temperature
• temperature difference between bearing rings
• rotational speed
• load
• mounting method

A bearing marked C3 or C4 has a different internal clearance specification from a bearing without that suffix.

The required clearance should therefore be established from the machine specification and bearing arrangement.

Alternative designations and search references

Natural designation and search variants include:

• TIMKEN 23030EJW33
• 23030EJW33 TIMKEN
• TIMKEN 23030 EJW33
• 23030 EJW33 TIMKEN
• 23030-EJW33
• 23030 EJ W33
• 23030EJ W33
• TIMKEN 23030 W33
• 23030 TIMKEN bearing
• 23030 spherical roller bearing
• 23030EJW33 spherical roller bearing
• TIMKEN spherical roller bearing 150x225x56
• spherical bearing 150x225x56
• 23030 bearing 150x225x56
• 23030 W33 bearing 150x225x56
• double row spherical roller bearing 150x225x56

These are natural designation and search variants. They do not establish automatic interchangeability with bearings from other manufacturers.

How to select a replacement for 23030EJW33

Before selecting an equivalent bearing, verify:

• 150 mm bore diameter
• 225 mm outside diameter
• 56 mm width
• double-row spherical roller bearing construction
• cylindrical bore
• cage design
• cage material
• W33 lubrication feature
• required internal clearance
• dynamic load rating
• static load rating
• required axial load capability
• operating speed
• shaft fit
• housing fit
• lubrication method
• operating temperature
• permissible misalignment
• machine manufacturer's requirements

Identical dimensions of 150x225x56 mm alone do not guarantee complete interchangeability.

Typical applications of spherical roller bearings

Double-row spherical roller bearings are widely used in demanding industrial bearing arrangements exposed to high loads and possible misalignment.

Typical application areas for this bearing category include:

• industrial gearboxes
• conveyor systems
• crushers
• vibrating screens
• industrial fans
• mining equipment
• steel industry machinery
• paper machinery
• material handling equipment
• heavy industrial machinery
• industrial shaft systems
• maintenance operations

These are typical applications of spherical roller bearings as a product category. They do not confirm that 23030EJW33 is specified for a particular machine or OEM application.

Installation of TIMKEN 23030EJW33

Before installation, inspect the shaft, housing and adjacent mounting surfaces.

Good installation practice includes:

• maintaining high cleanliness
• using appropriate mounting equipment
• checking shaft and housing fits
• avoiding mounting forces transmitted through the rollers
• applying the correct lubricant
• checking the required operating clearance
• verifying bearing alignment
• considering the W33 relubrication arrangement

With a 150 mm bore bearing, the mounting method should be selected according to the required interference fit and the design of the bearing arrangement.

Improper mounting can affect internal clearance, operating temperature and bearing service life.

FAQ - TIMKEN 23030EJW33

What are the dimensions of TIMKEN 23030EJW33?

The bearing has a 150 mm bore diameter, 225 mm outside diameter and 56 mm width. Its principal dimensions are 150x225x56 mm.

What type of bearing is 23030EJW33?

It is a double-row spherical roller bearing.

Does 23030EJW33 have a cylindrical bore?

Yes. 23030EJW33 has a cylindrical bore. A tapered-bore version is identified by an additional K suffix.

What does EJ mean?

EJ identifies a TIMKEN spherical roller bearing execution with a steel cage.

What does W33 mean?

W33 identifies a lubrication-related feature designed to support lubricant supply and distribution within the bearing.

What is the dynamic load rating of 23030EJW33?

TIMKEN specifies a dynamic radial load rating C1 of 621 kN.

What is the static load rating of 23030EJW33?

TIMKEN specifies a static radial load rating C0 of 911 kN.

What reference speeds does TIMKEN specify?

TIMKEN specifies a Thermal Reference Speed of 2600 rpm with oil and 2200 rpm with grease.

TIMKEN 23030EJW33 150x225x56 mm - key information

TIMKEN 23030EJW33 is a double-row self-aligning spherical roller bearing with a cylindrical bore, EJ steel cage and W33 lubrication feature. Dimensions are 150x225x56 mm. TIMKEN specifies a dynamic radial load rating C1 of 621 kN, static radial load rating C0 of 911 kN and Thermal Reference Speeds of 2600 rpm with oil and 2200 rpm with grease.

Availability from simmering.pl

TIMKEN 23030EJW33 150x225x56 mm spherical roller bearing is available from simmering.pl for industrial customers, maintenance departments, machine manufacturers, technical services, distributors and B2B procurement.

simmering.pl supplies industrial bearings and technical sealing products from stock in Poland, with worldwide shipping available.