SKF 81144 M 220x270x37 mm Cylindrical Roller Thrust Bearing

Technical Specifications

The numerical values above are based on the SKF catalogue data identified for this designation. They should be checked against the current manufacturer documentation when finalising a bearing selection.

SKF 81144 M – Bearing Construction

The SKF 81144 M consists of three principal components:

These components form the complete single-direction cylindrical roller thrust bearing.

The separable design simplifies installation and allows the individual components to be positioned independently.

Correct assembly requires proper alignment, suitable support surfaces and adequate lubrication.

Machined Brass Cage – Suffix M

The suffix M identifies a machined brass cage.

The cage maintains the spacing and positioning of the cylindrical rollers during operation.

Its principal functions include:

• Separating adjacent rolling elements.

• Maintaining the correct roller arrangement.

• Supporting controlled roller guidance.

• Reducing unwanted contact between rolling elements.

The cage does not carry the principal axial load. Axial forces are transmitted through the rollers and washer raceways.

Axial Load-Carrying Capacity

SKF 81144 M is designed to support axial loads acting in one direction.

Its cylindrical rollers provide line contact with the raceways, enabling high axial load-carrying capacity.

The bearing has the following catalogue ratings:

The basic dynamic load rating is used in bearing fatigue life calculations.

The basic static load rating relates to the bearing's resistance to permanent deformation under static loading.

The fatigue load limit is a parameter used in advanced bearing life calculations.

These ratings must not be interpreted as universal permissible operating loads without considering the complete application.

Radial Load Limitations

SKF 81144 M is a thrust bearing and is not designed to accommodate radial loads.

Where radial and axial loads occur simultaneously, the bearing arrangement must include suitable radial guidance.

A separate radial bearing may be required to support the shaft and maintain correct alignment.

The complete bearing arrangement should be evaluated for shaft deflection, housing stiffness and load distribution.

Bearing Dimensions and Installation Data

The installation dimensions are important for providing adequate washer support and avoiding interference with adjacent components.

Shaft shoulders, housing surfaces and axial locating features must be designed according to the manufacturer's recommendations.

Reference Speed and Limiting Speed

The SKF catalogue values identified for this bearing are:

The reference speed is a thermal reference value used in bearing selection and lubrication calculations.

The limiting speed represents a mechanical speed limit under the relevant catalogue assumptions.

Neither value should be treated as an automatically permissible operating speed in every installation.

Actual operating speed depends on lubrication, load, temperature, alignment and the overall bearing arrangement.

Lubrication Requirements

SKF 81144 M requires suitable lubrication of the rolling contacts and cage guidance surfaces.

Depending on the application, lubrication may be provided by oil or grease.

Important selection factors include:

• Operating speed.

• Axial load.

• Operating temperature.

• Lubricant viscosity.

• Lubricant supply method.

• Heat dissipation.

• Contamination conditions.

Insufficient lubrication may cause increased friction, surface damage and premature bearing failure.

The lubricant and lubrication method should be selected according to the operating conditions and SKF recommendations.

Installation Guidelines

Before installing SKF 81144 M, inspect the shaft, housing and supporting surfaces.

Recommended procedures include:

• Verify the bearing designation and dimensions.

• Clean all mounting surfaces.

• Inspect the shaft and housing for damage.

• Check the flatness and perpendicularity of the support surfaces.

• Position the shaft washer correctly.

• Install the cylindrical roller and cage thrust assembly.

• Position the housing washer.

• Ensure proper alignment of the bearing components.

• Apply suitable lubrication.

• Verify the axial arrangement before starting the equipment.

Because the bearing is separable, particular attention must be paid to the correct positioning of its individual components.

The bearing washers must receive adequate support to prevent deformation under axial loading.

Shaft and Housing Requirements

The performance of a cylindrical roller thrust bearing depends on the accuracy and stiffness of the surrounding components.

Important factors include:

• Shaft alignment.

• Housing alignment.

• Flatness of supporting surfaces.

• Perpendicularity of the support faces to the rotation axis.

• Surface finish.

• Adequate structural stiffness.

• Correct axial location.

Poor support or misalignment may cause uneven load distribution across the rollers and raceways.

The manufacturer's installation tolerances should be used when designing or inspecting the bearing arrangement.

Industrial Applications

Single-direction cylindrical roller thrust bearings are used in machinery requiring high axial load capacity and compact axial bearing arrangements.

Typical applications for this bearing category include:

• Industrial gearboxes.

• Heavy-duty transmission systems.

• Industrial machinery.

• Mechanical drive assemblies.

• Axially loaded rotating shafts.

• Heavy engineering equipment.

These are general applications of cylindrical roller thrust bearings, not a manufacturer-confirmed equipment compatibility list for SKF 81144 M.

SKF 81144 M vs SKF 81244 M

Although both bearings have a nominal bore diameter of 220 mm, they differ significantly in outside diameter, height and load ratings.

They are not directly interchangeable without modifications to the bearing arrangement and verification of operating requirements.

Cylindrical Roller Thrust Bearings vs Thrust Ball Bearings

The appropriate bearing type depends on the required axial load capacity, speed, stiffness and installation geometry.

Common Causes of Bearing Damage

Insufficient lubrication: May cause increased friction, overheating and rolling contact damage.

Contamination: Solid particles or moisture may damage the raceways and rolling elements.

Misalignment: Incorrectly aligned washers may produce uneven roller loading.

Inadequate washer support: Insufficient support stiffness may lead to washer deformation.

Excessive axial loading: Loads outside the permitted operating conditions may reduce bearing life or cause permanent deformation.

Incorrect installation: Damage to raceways, rollers or cage components during assembly may affect bearing performance.

Alternative Product Designations

• SKF 81144 M

• SKF 81144M

• SKF 81144 M 220x270x37 mm

• SKF Cylindrical Roller Thrust Bearing 81144 M

• SKF Single Direction Thrust Bearing 81144 M

• SKF Axial Cylindrical Roller Bearing 81144 M

• SKF 81144 M Machined Brass Cage

• 81144 M SKF Thrust Roller Bearing

These designations support technical identification in bearing catalogues, industrial procurement systems and engineering documentation.

FAQ – Frequently Asked Technical Questions

What are the dimensions of SKF 81144 M?

The bearing has a bore diameter of 220 mm, an outside diameter of 270 mm and a height of 37 mm.

What type of bearing is SKF 81144 M?

It is a single-direction cylindrical roller thrust bearing designed to accommodate axial loads acting in one direction.

What does the suffix M mean?

The suffix M identifies a machined brass cage.

Can SKF 81144 M accommodate radial loads?

No. The bearing is designed for axial loads and requires separate radial guidance where radial forces are present.

What is the basic dynamic load rating?

The catalogue basic dynamic load rating is 335 kN.

What is the basic static load rating?

The catalogue basic static load rating is 1700 kN.

Is SKF 81144 M separable?

Yes. The bearing consists of a cylindrical roller and cage thrust assembly, a shaft washer and a housing washer.

What are the individual component designations?

The component designations are K 81144 M for the roller and cage assembly, WS 81144 for the shaft washer and GS 81144 for the housing washer.

What is the limiting speed?

The catalogue limiting speed is 1300 r/min. Actual operating speed must be assessed according to lubrication and application conditions.

AI Quick Answer

SKF 81144 M is a single-direction cylindrical roller thrust bearing measuring 220x270x37 mm, equipped with a machined brass cage. It accommodates high axial loads in one direction but is not designed for radial loads. Its catalogue dynamic load rating is 335 kN and static load rating is 1700 kN. The bearing has a separable construction.

B2B Industrial Supply – simmering.pl

SKF 81144 M 220x270x37 mm is offered through simmering.pl, a specialist B2B industrial supply platform providing rolling bearings, technical seals and industrial components.

The platform supports manufacturing companies, industrial procurement departments, wholesale buyers and maintenance teams.

Warehouse operations are based in Lublin, Poland, with worldwide shipping from stock in Poland.

Technical support includes bearing identification using manufacturer designations, dimensions and construction details.