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TIMKEN
Thrust Bearings

Thrust Bearings

Product catalog summary

Timken Overview
Timken is a global leader in metallurgy, friction management, and mechanical power transmission, offering products and services that enhance productivity across industries like manufacturing, mining, and aerospace. The company focuses on client collaboration to improve business operations.

Products and Services

Bearings: Includes tapered, cylindrical, spherical, and thrust roller bearings for various applications.
High-Performance Solutions: Specialized bearings like AquaSpexx® and DuraSpexx® for corrosion and debris resistance.
Power Transmission Components: Seals, couplings, and engineered chains for extreme conditions.
Lubrication: Lubricants and delivery devices to reduce friction and protect against corrosion.
Condition Monitoring: Diagnostic tools for detecting potential bearing failures.
Maintenance Tools: Tools for proper installation and service of bearings.
Services: Remanufacturing and reconditioning services for bearings and gearboxes.
Training: Industry-specific training programs.

Shelf Life and Storage
Timken provides guidelines for the shelf life of grease-lubricated bearings, emphasizing storage conditions. Products should remain in original packaging, with storage temperatures between 0º C and 40º C, and humidity below 60%.

Warnings and Cautions
Proper maintenance and handling are critical. Bearings should not be spun with compressed air or exposed to extreme conditions.

Compliance
Timken products comply with international standards, including European REACH.

Engineering Section
Guidance on thrust bearing selection, covering types, reactions, ratings, system life, tolerances, mounting design, operation, and lubrication.

Thrust Bearing Types

Thrust Spherical Roller Bearings: Handle high-thrust capacity and allow axial misalignment up to ±2.5˚.
Thrust Tapered Roller Bearings: Suitable for heavy-duty applications with specific features for handling high thrust and shock loads.
Crossed Roller Bearings (TXR): High resistance to overturning moments, ideal for machine tool applications.

Bearing Reactions and Load Calculations

Dynamic Equivalent Thrust Load (Pa): Calculated to determine the fatigue life of a thrust bearing.
Static Axial Equivalent Loads: Used to compare the load on a non-rotating bearing with its static capacity.
Minimum Bearing Load: Required to overcome induced thrust from centrifugal forces.

Bearing Ratings

Dynamic Load Rating: Estimates the life of a rotating bearing.
Static Load Rating: Determines the maximum permissible load for a non-rotating bearing.

Specifications and Stress Levels
Discusses stress levels for roller and ball bearings, highlighting that stress levels of 4000 MPa for roller bearings and 4200 MPa for ball bearings may cause visible Brinell marks on raceways.

Bearing Life
Defined by the time or revolutions until a fatigue spall of 6 mm² develops, with life predictions based on a statistical evaluation using the Weibull distribution function.

Bearing Life Equations
Provides equations for calculating L10 life for radial and thrust bearings, considering dynamic load ratings and additional variables affecting performance.

Reliability and Life Factors

Reliability life factor (a1): Adjusts L10 life based on reliability percentage.
Material life factor (a2): Considers the quality of steel used.
Debris life factor (a3d): Accounts for debris in lubrication systems.
Lubrication life factor (a3l): Considers lubrication film's role in reducing metal contact.

Additional Factors
Discusses factors like grease lubrication, misalignment, and system life, with weighted average load and life equations for applications with variable conditions.

Weighted Average Life Calculation
Recommends calculating life for each condition and using a weighted average life equation.

Bearing Tolerances
Manufactured to specific dimensional tolerances, differing between metric and inch systems.

Thrust Bearing Tolerances
Detailed tables for thrust ball, spherical roller, and cylindrical roller bearing tolerances, conforming to ABMA standards.

Mounting Design and Fitting Practices
Proper mounting design and fitting practices are crucial for bearing performance.

Thrust Cylindrical Roller Bearings
Used in heavy industrial equipment to handle compressive loads.

Thrust Spherical Roller Bearings (Type TSR)
Support axial forces and handle misalignment up to 2.5 degrees.

Thrust Tapered Roller Bearings (Type TTHD)
Used in applications like plastic extruder thrust blocks and marine drives.

Screwdown Systems (Types TTHDSX/SV and TTHDFLSX/SV)
Used in metal mills to handle extremely high loads.

Double-Acting Heavy Duty Thrust Tapered Roller Bearings (Types TTDWK and TTDFLK)
Used in strip mills for high axial loads.

Crossed Roller Bearings (TXR)
Typically mounted with oil circulation for lubrication.

Fitting Practice
General guidelines suggest interference fits for rotating members and clearance fits for stationary members.

Housing Fits for Thrust Cylindrical Roller Bearings (Type TP)
Provides nominal housing diameter and permissible deviations.

Thrust Spherical Roller Bearing Fits
Outlines tolerances for shaft and housing fits.

Thrust Tapered Roller Bearing Fits
Provides fitting guidelines for thrust tapered roller bearings.

Precision Class TXR Tapered Roller Bearings
Details precision classes for TXR tapered roller bearings.

Installation and Maintenance
Emphasizes proper installation and maintenance practices.

Operating Temperatures and Material Limitations
Discusses operating temperature ranges and material limitations.

Stability and Operating Temperatures
Outlines stability designations and maximum operating temperatures for various materials.

Material Recommendations
Provides suggested materials for balls, rings, and rollers at different operating temperatures.

Lubrication Limitations
Lubrication is crucial for minimizing rolling resistance and transferring heat.

Equipment Requirements
Designers must consider temperature effects on equipment performance.

Bearing Operation
Bearings can operate up to 120°C (250°F), but a practical limit is 80°C to 95°C.

Heat Generation and Dissipation
Equations are provided to calculate heat generation and dissipation.

Lubrication Systems
Discusses various lubrication systems, including oil bath and circulating systems.

Oil Types
Petroleum and synthetic oils are used for bearing lubrication.

Introduction to Lubricants
Discusses various types of oils and greases used for lubrication in industrial applications.

Types of Oils

PAO Oils: Used in extreme temperature environments due to their stability.
Silicone, Ester, and Polyglycol Oils: Differ in chemistry, affecting physical properties.

Viscosity Considerations

Viscosity selection depends on load, speed, and environmental factors.
Viscosity classifications are standardized by SAE, ASTM, and ISO.

Lubrication Engineering

General-Purpose Oils: Common for industrial applications without special conditions.
Extreme-Pressure Gear Oils: Used for heavily loaded equipment.

Grease Lubrication

Suitable for low-to-moderate speed applications.
Different thickeners offer varying properties.

Temperature and Contamination Effects

Grease performance is affected by temperature.
Contaminants can significantly reduce bearing life.

Grease Selection

Selection depends on the grease's properties and application conditions.
Consultation with suppliers or engineers is recommended.

Overview
The document provides detailed information on Timken's lubrication solutions and thrust bearing catalog.

Grease Lubrication Selection Guide
Timken offers application-specific lubricants designed to enhance bearing performance.

Grease Use Guidelines
Proper grease application is crucial for bearing performance.

Consistency and Compatibility
Grease consistency is measured by penetration number.

Thrust Bearing Data
Details various types of thrust bearings with specifications.

Key Recommendations

Consult with Timken engineers for specialized lubrication needs.
Follow specific lubrication instructions from equipment suppliers.
Regularly check and maintain proper grease levels.

Overview
The document is a technical catalog from Timken, detailing specifications and data for various types of thrust bearings.

Angular-Contact Thrust Ball Bearings (Type TVL and DTVL)

Design: Handle high axial loads in one direction and lighter axial loads in the opposite direction.
Dimensions: Key dimensions include upper and lower bore diameters.
Load Ratings: Static and dynamic load ratings are provided.
Fillet Radius: Maximum shaft or housing fillet radius is specified.

Thrust Cylindrical Roller Bearings (Type TP)

Design: Feature two or three cylindrical rollers per cage pocket.
Dimensions: Important dimensions include bore diameter and bearing O.D.
Load Ratings: Static and dynamic load ratings are provided.
Fillet Radius: Maximum fillet radius is specified for clearance purposes.

Data Tables
Includes extensive tables listing specific bearing numbers, dimensions, load ratings, and weights.

Overview
The document is a technical catalog from Timken, detailing specifications and features of thrust cylindrical and spherical roller bearings.

Key Sections

Specifications: Detailed specifications for each bearing type.
Design Features: TSR-EJ and TSR-EM bearings designed for high thrust capacity.
Modification Codes: Table lists various modification codes for Timken bearings.
Tables and Data: Extensive tables provide detailed measurements and performance data.

Critical Information

Load Ratings: Crucial for determining the bearing's capacity to handle loads.
Speed Ratings: Indicate the maximum operational speeds for the bearings.
Design Variants: Choice between steel and brass cage designs affects lubrication flow and load capacity.

Conclusion
This catalog serves as a comprehensive guide for selecting the appropriate thrust bearing based on specific application requirements.

Overview
The document is a technical catalog from Timken, detailing specifications and data for various types of thrust tapered roller bearings.

Key Sections

Thrust Tapered Roller Bearings – Type TTHDFLSA: Unique design with a spherically ground lower race.
Thrust Tapered Roller Bearings – Types TTSP, TTSPS, and TTSPL: Used in light-duty applications.
Thrust Tapered Roller Bearings – Types TTC, TTCS, and TTCL: Designed for oscillating applications.

Tables and Figures

Table 46: Provides detailed dimensions and load ratings for Type TTHDFLSA bearings.
Table 47: Lists dimensions and load ratings for Type TTSP bearings.
Table 48: Details dimensions and load ratings for Types TTC, TTCS, and TTCL bearings.

Critical Information

Fillet Radius: Maximum shaft or housing fillet radius is specified for each bearing type.
Load Ratings: Static and dynamic load ratings are provided.
Special Features: Some bearings include special features.

Thrust Tapered Roller Bearings – Types TTDWK and TTDFLK

Specifications:
Provides detailed specifications for thrust tapered roller bearings.

Load Ratings:
Load ratings are provided for dynamic and static conditions.

Mounting and Keyway Dimensions:
Details on mounting dimensions and keyway dimensions are included.

Thrust Tapered Roller Bearings – Crossed Roller Bearings – Type TXR

Design and Features:
Designed for precision rotational applications.

Load Ratings and Preload:
Load ratings for radial and axial loads are provided.

Overall Dimensions:
Dimensions such as bore diameter and outer diameter are specified.

Additional Notes:
Preload values assume the use of suggested fitting practices.

Catalog excerpts

TIMKEN® THRUST BEARING CATALOG TIM KEN' THRUST BEARING CATALOG • Download 3D Models and 2D Drawings at cad.timken.com.

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THRUST BEARING CATALOG INDEX TIMKEN OVERVIEW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 SHELF LIFE AND STORAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 ENGINEERING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Thrust Bearing Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Bearing Reactions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Bearing Ratings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

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TIMKEN OVERVIEW GROW STRONGER WITH TIMKEN Every day, people around the world count on the strength of Timken. Our expertise in metallurgy, friction management and mechanical power transmission helps them accelerate improvements in productivity and uptime. We supply products and services that can help keep your operations moving forward, whether you need drive train kits for commercial vehicles, durable housings for bearings in dirty environments, couplings that avoid metal-to-metal contact between motors and gearboxes, repair services for bearings and gearboxes, roller chain for dry, abrasive...

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TIMKEN OVERVIEW INCREASE YOUR EQUIPMENT UPTIME In addition to high-quality bearings and mechanical power transmission components, we provide valuable integrated products and services. For example, we offer repair services and monitoring equipment that can alert you to problems before they impact your uptime. Additionally, we offer a broad selection of seals, premium lubricants, lubricators, couplings and chain to keep your operations moving smoothly. Our 12 technology centers in the United States, Europe and Asia help pioneer tomorrow’s innovations with extensive basic and applied scientific...

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TIMKEN OVERVIEW INDUSTRIAL INNOVATOR Today, manufacturing and processing equipment handle heavier loads, faster speeds and greater expectations than ever before. As finished-product quality requirements increase, producers continue to place a very high premium on equipment uptime and performance. Timken has more than a century of experience developing bearings and related solutions that help equipment run more efficiently in a wide range of applications. As the leader in friction-management and power-transmission solutions for industrial markets, Timken helps operators improve their equipment’s...

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TIMKEN PRODUCTS AND SERVICES PRODUCTS AND SERVICES We offer equipment builders and operators one of the most extensive friction-management product and service portfolios in the industry. We also strictly adhere to the Timken Quality Management System in every plant worldwide, so each bearing product meets the same high quality standards – no matter where in the world it is manufactured. capacity and advanced geometry that reduces friction and heat generation. These bearings are available in a range of dimensional stability configurations to suit elevated operating temperatures. •• Thrust roller...

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TIMKEN PRODUCTS AND SERVICES •• Ball bearings - Ball bearings are used extensively in auxiliary applications that have light loads and/or highspeed conditions. Timken offers a range of radial, thrust and angular contact ball bearings in both metric and inch sizes. Please contact your Timken engineer for detailed information on these product ranges. •• Housed units - Timken® spherical roller bearing solid- block housed units process a unique cast-steel design that handles demanding conditions in metal industry applications. These solid-block housed units come in several styles and five advanced...

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TIMKEN PRODUCTS AND SERVICES POWER TRANSMISSION COMPONENTS AND SYSTEMS Timken offers an expanding range of power transmission components including seals, couplings and engineered chain. Extreme temperatures and high contamination levels can disable your equipment and significantly lower productivity. Timken develops seals using advanced material and process solutions that help protect machinery and minimize plant downtime. We offer a comprehensive line of large-bore oil and grease seals, and metallic and non-metallic bearing isolators. Timken® Quick-Flex® couplings are highly durable, yet need...

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TIMKEN PRODUCTS AND SERVICES TRAINING We offer industry-specific training programs designed for plant professionals, as well as on-site customized training to meet your specific needs. Our training programs are available at select locations around the world and cover every phase of bearing performance. Class time is balanced with extensive hands-on training and tours of Timken facilities. MAINTENANCE TOOLS Timken® maintenance tools may extend bearing life by facilitating proper installation, removal and service. They also help simplify maintenance practices. We provide induction heaters, impact...

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TIMKEN HOW TO USE THIS CATALOG HOW TO USE THIS CATALOG We designed this catalog to help you find the Timken bearings best suited to your equipment needs and specifications. The product tables list many of the bearing types that are specifically used in thrust positions. For other bearing types, please refer to the respective Timken product catalog reference. Timken offers an extensive range of bearings and accessories in both imperial and metric sizes. For your convenience, size ranges are indicated in millimeters and inches. Contact your Timken engineer to learn more about our complete line...

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TIMKEN SHELF LIFE AND STORAGE SHELF LIFE AND STORAGE OF GREASE-LUBRICATED BEARINGS AND COMPONENTS To help you get the most value from our products, Timken provides guidelines for the shelf life of grease-lubricated ball and roller bearings, components and assemblies. Shelf life information is based on Timken and industry test data and experience. SHELF LIFE POLICY European REACH Compliance Shelf life should be distinguished from lubricated bearing/ component design life as follows: Timken lubricants, greases and similar products sold in standalone containers or delivery systems are subject to...

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Thrust Bearings

Thrust Bearings

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