22218EJW33 TIMKEN 90x160x40 mm Spherical Roller Bearing

22218EJW33 TIMKEN 90x160x40 mm Spherical Roller Bearing

22218EJW33 TIMKEN 90x160x40 mm is a double-row self-aligning spherical roller bearing with a cylindrical bore, EJ steel cage and W33 lubrication feature. The bearing is designed primarily for high radial loads while also accommodating axial loads and a certain degree of shaft-to-housing misalignment.

Technical data - TIMKEN 22218EJW33

What does 22218EJW33 mean?

The complete designation:

22218EJW33

identifies a specific TIMKEN spherical roller bearing execution.

The principal elements of the designation are:

• 22218 - basic spherical roller bearing designation
• EJ - TIMKEN steel cage design
• W33 - lubrication feature
• no K suffix - cylindrical bore
• TIMKEN - manufacturer

The complete designation is important when selecting a replacement. Dimensions of 90x160x40 mm alone are not sufficient to establish complete technical interchangeability.

Dimensions of TIMKEN 22218EJW33

The principal dimensions are:

90x160x40 mm

where:

• d = 90 mm - bore diameter
• D = 160 mm - outside diameter
• B = 40 mm - bearing width

TIMKEN also specifies installation-related dimensions including:

• maximum fillet radius = 2 mm
• shaft backing diameter = 105 mm
• housing backing diameter = 146 mm

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

Double-row spherical roller bearing

TIMKEN 22218EJW33 is a double-row spherical roller bearing.

Two rows of barrel-shaped rollers operate against a common spherical raceway in the outer ring. This design combines high load-carrying capability with self-aligning characteristics.

The bearing can operate in arrangements exposed to:

• high radial loads
• axial loads
• combined radial and axial loading
• a certain degree of shaft-to-housing misalignment
• shaft deflection
• demanding industrial operating conditions

Self-aligning capability

One of the key characteristics of a spherical roller bearing is its ability to self-align.

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

This helps accommodate certain levels of:

• shaft and housing misalignment
• shaft deflection
• structural deflection
• minor mounting inaccuracies

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

Self-aligning capability should not be considered a substitute for correct machine alignment.

Cylindrical bore - 90 mm

TIMKEN 22218EJW33 has a cylindrical bore with a diameter of:

90 mm

The absence of the letter K is technically significant.

The following versions should be distinguished:

22218EJW33

• cylindrical bore

22218KEJW33

• tapered bore
• 1:12 taper
• K suffix

These versions have different mounting requirements and should not automatically be treated as interchangeable.

What does EJ mean?

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

TIMKEN classifies 22218EJW33 within its:

Spherical Roller Bearings - Steel Cage

product family.

For 22218EJW33:

Cage type: EJ

Cage material: steel

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

Cage construction is an important part of the complete bearing specification and should be considered when comparing different executions.

What does W33 mean?

W33 identifies a lubrication-related feature incorporated into the bearing design.

This feature supports lubricant supply and distribution within the bearing and is particularly relevant in industrial bearing arrangements requiring periodic relubrication.

The W33 designation should therefore remain part of the complete product identification:

22218EJW33

Lubricant type, quantity and relubrication interval should be selected according to actual operating conditions and manufacturer recommendations.

Radial and axial load capability

Spherical roller bearings are primarily designed for high radial loads.

Their internal geometry also enables them to accommodate axial loading, making them suitable for applications where radial and axial forces occur simultaneously.

Actual load capability depends on factors including:

• radial load
• axial load
• load direction
• rotational speed
• lubrication
• internal clearance
• operating temperature
• shaft and housing fits

Load ratings of TIMKEN 22218EJW33

TIMKEN specifies:

Dynamic radial load rating C1: 355 kN

Static radial load rating C0: 388 kN

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

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

Correct bearing selection requires consideration of the complete operating conditions and required service life.

Calculation factors

TIMKEN specifies the following calculation factors for 22218EJW33:

• e = 0.23
• Y0 = 2.83
• Y1 = 2.90
• Y2 = 4.31
• Cg = 0.0638

These values are used in engineering calculations according to TIMKEN methodology.

Accurate bearing calculations require actual radial and axial loads together with the complete operating conditions.

Speed data

TIMKEN specifies:

Thermal Reference Speed - oil: 4100 rpm

Thermal Reference Speed - grease: 3400 rpm

These are manufacturer reference values.

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

Actual operating speed capability depends on factors including:

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

22218EJW33 vs 22218KEJW33

The principal difference is the bore design.

22218EJW33

• cylindrical bore
• bore diameter 90 mm

22218KEJW33

• tapered bore
• 1:12 taper
• K suffix

The K suffix is therefore technically significant.

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

The shaft design and mounting arrangement must be verified before substitution.

22218EJW33 vs 22218EJW33C3

TIMKEN also offers the designation:

22218EJW33C3

The C3 suffix identifies increased internal clearance.

The standard designation:

22218EJW33

does not contain the C3 suffix.

The two executions should therefore not automatically be considered identical.

The required internal clearance depends on factors including:

• shaft fit
• housing fit
• operating temperature
• rotational speed
• bearing load
• temperature differences between the bearing rings

When available, the machine manufacturer's specification should take priority.

22218EJW33 vs 22218EMW33

TIMKEN also offers:

22218EMW33

Both bearings have the same principal dimensions of 90x160x40 mm, but EJ and EM identify different bearing executions.

22218EJW33 belongs to the TIMKEN steel cage family, while the EM version uses a different cage construction.

Identical dimensions therefore do not necessarily mean identical internal bearing design.

The complete designation should always be checked before replacement.

Internal clearance

Internal clearance is an important parameter when selecting a spherical roller bearing.

Effective operating clearance can change as a result of:

• interference fits
• shaft temperature
• housing temperature
• temperature differences between bearing rings
• rotational speed
• operating load
• mounting conditions

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

Increased clearance should not be assumed unless it is explicitly stated in the complete bearing designation or confirmed by technical documentation.

Alternative designations and search references

Natural designation and search variants include:

• TIMKEN 22218EJW33
• 22218EJW33 TIMKEN
• TIMKEN 22218 EJW33
• 22218 EJW33 TIMKEN
• 22218-EJW33
• 22218 EJ W33
• 22218EJ W33
• TIMKEN 22218 W33
• 22218 TIMKEN
• 22218 TIMKEN bearing
• TIMKEN 22218 bearing
• 22218 spherical roller bearing
• 22218EJW33 spherical roller bearing
• 22218 bearing 90x160x40
• TIMKEN bearing 90x160x40
• spherical roller bearing 90x160x40
• double row spherical roller bearing 90x160x40
• 22218 W33 spherical roller bearing

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

How to select a replacement for 22218EJW33

Before selecting an equivalent bearing, verify:

• 90 mm bore diameter
• 160 mm outside diameter
• 40 mm width
• double-row spherical roller bearing construction
• cylindrical bore
• cage execution
• steel cage
• W33 lubrication feature
• required internal clearance
• dynamic load rating
• static load rating
• axial load requirements
• operating speed
• shaft fit
• housing fit
• lubrication method
• operating temperature
• permissible misalignment
• machine manufacturer's requirements

Identical dimensions of 90x160x40 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 22218EJW33 is specified for a particular machine or OEM application.

Installation of TIMKEN 22218EJW33

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

Good installation practice includes:

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

With a 90 mm cylindrical bore, the mounting method should be selected according to the required fit and design of the bearing arrangement.

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

FAQ - TIMKEN 22218EJW33

What are the dimensions of TIMKEN 22218EJW33?

The bearing has a 90 mm bore diameter, 160 mm outside diameter and 40 mm width. Its principal dimensions are 90x160x40 mm.

What type of bearing is 22218EJW33?

It is a double-row self-aligning spherical roller bearing.

Does 22218EJW33 have a cylindrical bore?

Yes. 22218EJW33 has a cylindrical bore. The 22218KEJW33 version has a tapered bore.

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 22218EJW33?

TIMKEN specifies a dynamic radial load rating C1 of 355 kN.

What is the static load rating of 22218EJW33?

TIMKEN specifies a static radial load rating C0 of 388 kN.

What reference speeds does TIMKEN specify?

TIMKEN specifies a Thermal Reference Speed of 4100 rpm with oil and 3400 rpm with grease.

TIMKEN 22218EJW33 90x160x40 mm - key information

TIMKEN 22218EJW33 is a double-row self-aligning spherical roller bearing with dimensions of 90x160x40 mm, a cylindrical bore, EJ steel cage and W33 lubrication feature. TIMKEN specifies a dynamic radial load rating C1 of 355 kN, static radial load rating C0 of 388 kN and Thermal Reference Speeds of 4100 rpm with oil and 3400 rpm with grease.

Availability from simmering.pl

TIMKEN 22218EJW33 90x160x40 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.