- Catalogs
- TIMKEN Europe
- Timken Spherical Roller Bearing Catalog
- Company
- Products
- Catalogs
- News & Trends
- Exhibitions
Timken Spherical Roller Bearing Catalog
1 / 182 PagesView full catalog
Timken Spherical Roller Bearing Catalog
Product catalog summary
Overview
Timken's Spherical Roller Bearing Catalog provides a comprehensive guide to their range of bearings and accessories, emphasizing quality, innovation, and dependability. It outlines Timken's friction management solutions, which enhance performance, fuel efficiency, and equipment longevity through integrated services beyond bearings, such as condition monitoring systems, encoders, sensors, seals, and lubricants.
Timken's Spherical Roller Bearing Catalog provides a comprehensive guide to their range of bearings and accessories, emphasizing quality, innovation, and dependability. It outlines Timken's friction management solutions, which enhance performance, fuel efficiency, and equipment longevity through integrated services beyond bearings, such as condition monitoring systems, encoders, sensors, seals, and lubricants.
Technology and Innovation
Timken focuses on solving engineering challenges by investing in skilled personnel, advanced tools, and future-oriented research and development. Their commitment to sustainability is evident in their efforts to create systems with smaller, more efficient components to improve performance.
Timken focuses on solving engineering challenges by investing in skilled personnel, advanced tools, and future-oriented research and development. Their commitment to sustainability is evident in their efforts to create systems with smaller, more efficient components to improve performance.
Quality Assurance
The Timken Quality Management System (TQMS) ensures continuous quality improvements across global operations. All production facilities and distribution centers adhere to relevant quality system standards.
The Timken Quality Management System (TQMS) ensures continuous quality improvements across global operations. All production facilities and distribution centers adhere to relevant quality system standards.
Shelf Life Policy
The shelf life of grease-lubricated bearings is distinct from their design life and is influenced by storage conditions. Timken provides guidelines for optimal storage, emphasizing the importance of maintaining temperature and humidity levels and avoiding contamination and vibration.
The shelf life of grease-lubricated bearings is distinct from their design life and is influenced by storage conditions. Timken provides guidelines for optimal storage, emphasizing the importance of maintaining temperature and humidity levels and avoiding contamination and vibration.
Product Offering
Timken offers a broad range of spherical roller bearings, available in various sizes and configurations to meet demanding applications. Their product line includes bearings with stamped-steel or precision-machined-brass cages, and pillow blocks for easy assembly and disassembly. Accessories are available to facilitate safe and effective mounting and dismounting.
Timken offers a broad range of spherical roller bearings, available in various sizes and configurations to meet demanding applications. Their product line includes bearings with stamped-steel or precision-machined-brass cages, and pillow blocks for easy assembly and disassembly. Accessories are available to facilitate safe and effective mounting and dismounting.
Innovations in Bearing Design
Timken's redesigned spherical roller bearings offer higher load and speed ratings, improved surface finishes, and innovative features to lower operating temperatures and increase load-carrying capabilities. New cage designs and optimized internal geometries enhance performance and extend bearing life.
Timken's redesigned spherical roller bearings offer higher load and speed ratings, improved surface finishes, and innovative features to lower operating temperatures and increase load-carrying capabilities. New cage designs and optimized internal geometries enhance performance and extend bearing life.
Introduction to Spherical Roller Bearings
Timken's spherical roller bearings are designed for superior performance, offering lower operating temperatures which extend bearing life by enhancing lubricant longevity. A decrease of 5°C in operating temperature can result in a 9% increase in bearing life. Timken bearings consistently operate at lower temperatures compared to competitors.
Timken's spherical roller bearings are designed for superior performance, offering lower operating temperatures which extend bearing life by enhancing lubricant longevity. A decrease of 5°C in operating temperature can result in a 9% increase in bearing life. Timken bearings consistently operate at lower temperatures compared to competitors.
Performance and Quality
Timken's next-generation spherical roller bearings boast a 17% increase in thermal speed ratings. As a premium manufacturer, Timken ensures high-quality standards by producing super-clean, high-alloy bearing steels and adhering to a global quality management system.
Timken's next-generation spherical roller bearings boast a 17% increase in thermal speed ratings. As a premium manufacturer, Timken ensures high-quality standards by producing super-clean, high-alloy bearing steels and adhering to a global quality management system.
Engineering and Design
The catalog covers various engineering aspects such as bearing design types, cage designs, fitting practices, and lubrication recommendations. Timken offers different styles of radial spherical roller bearings, with specific cage designs for different applications. The EJ, EM, and EMB bearings have been redesigned for higher load ratings and reduced operating temperatures.
The catalog covers various engineering aspects such as bearing design types, cage designs, fitting practices, and lubrication recommendations. Timken offers different styles of radial spherical roller bearings, with specific cage designs for different applications. The EJ, EM, and EMB bearings have been redesigned for higher load ratings and reduced operating temperatures.
Optional Features
Timken bearings can include features like the W33 lubrication groove and oil holes, which facilitate lubrication and reduce the need for additional machining. Bearings for vibratory applications are available with specific modifications for enhanced performance.
Timken bearings can include features like the W33 lubrication groove and oil holes, which facilitate lubrication and reduce the need for additional machining. Bearings for vibratory applications are available with specific modifications for enhanced performance.
Cage Types
Cages in Timken bearings serve to separate rolling elements and improve lubrication flow. Different cage designs are available, including machined-brass and pin-type cages, each suited for specific applications.
Cages in Timken bearings serve to separate rolling elements and improve lubrication flow. Different cage designs are available, including machined-brass and pin-type cages, each suited for specific applications.
Tolerances and Specifications
Spherical roller bearings are manufactured to precise specifications with defined tolerances for dimensions such as bore and outer diameter. Timken provides detailed tables for these tolerances, ensuring proper selection and application of bearings.
Spherical roller bearings are manufactured to precise specifications with defined tolerances for dimensions such as bore and outer diameter. Timken provides detailed tables for these tolerances, ensuring proper selection and application of bearings.
Mounting and Fitting Practices
Proper mounting and fitting are crucial for bearing performance. Timken provides guidelines for fitting practices, considering factors like precision, material, and surface finish. Bearings are often mounted in combination to allow for axial movement and accommodate thermal expansion.
Proper mounting and fitting are crucial for bearing performance. Timken provides guidelines for fitting practices, considering factors like precision, material, and surface finish. Bearings are often mounted in combination to allow for axial movement and accommodate thermal expansion.
Conclusion
Timken's spherical roller bearings are engineered for high performance and reliability, supported by comprehensive engineering resources and expert assistance.
Timken's spherical roller bearings are engineered for high performance and reliability, supported by comprehensive engineering resources and expert assistance.
Specifications and Procedures:
The document outlines the specifications and procedures for mounting, fitting, setting, and installing spherical roller bearings, particularly focusing on tapered and cylindrical bore designs. It emphasizes the importance of proper maintenance, handling practices, and lubrication to prevent bearing and shaft damage.
The document outlines the specifications and procedures for mounting, fitting, setting, and installing spherical roller bearings, particularly focusing on tapered and cylindrical bore designs. It emphasizes the importance of proper maintenance, handling practices, and lubrication to prevent bearing and shaft damage.
Fitting Practices:
Stationary inner-ring fitting depends on application loading, while rotating outer-ring applications require an interference fit. Loose fits are generally used for stationary outer rings to allow assembly, disassembly, and axial movement. Thin-walled or light-alloy housings require tighter press fits compared to thick-walled or solid shafts.
Stationary inner-ring fitting depends on application loading, while rotating outer-ring applications require an interference fit. Loose fits are generally used for stationary outer rings to allow assembly, disassembly, and axial movement. Thin-walled or light-alloy housings require tighter press fits compared to thick-walled or solid shafts.
Installation Warnings:
Warnings include the risk of death or serious injury if proper maintenance and handling practices are not followed. It is crucial never to spin a bearing with compressed air as it may expel rollers forcefully.
Warnings include the risk of death or serious injury if proper maintenance and handling practices are not followed. It is crucial never to spin a bearing with compressed air as it may expel rollers forcefully.
Tapered Bore Designs:
Tapered bore bearings simplify shaft mounting and dismounting. They require a tighter fit on the shaft than cylindrical bore bearings. The document provides guidelines for approximating clearance loss due to axial drive-up and suggests using a locknut and lockwasher for securing the inner ring.
Tapered bore bearings simplify shaft mounting and dismounting. They require a tighter fit on the shaft than cylindrical bore bearings. The document provides guidelines for approximating clearance loss due to axial drive-up and suggests using a locknut and lockwasher for securing the inner ring.
Setting and Thermal Gradients:
Proper operation clearance is affected by fitting practices and thermal gradients, which increase with bearing speed. Radial clearance should be increased for speeds exceeding 70% of the speed rating. The document provides radial internal clearance (RIC) tolerances and emphasizes avoiding preloaded conditions to prevent premature damage.
Proper operation clearance is affected by fitting practices and thermal gradients, which increase with bearing speed. Radial clearance should be increased for speeds exceeding 70% of the speed rating. The document provides radial internal clearance (RIC) tolerances and emphasizes avoiding preloaded conditions to prevent premature damage.
Tables and Examples:
The document includes tables detailing radial internal clearance limits for both cylindrical and tapered bore bearings. It provides examples of calculating RIC reduction using spherical roller bearings with both tapered and cylindrical bores, highlighting the importance of selecting appropriate RIC based on speed and fit.
The document includes tables detailing radial internal clearance limits for both cylindrical and tapered bore bearings. It provides examples of calculating RIC reduction using spherical roller bearings with both tapered and cylindrical bores, highlighting the importance of selecting appropriate RIC based on speed and fit.
Installation Methods:
For cylindrical bore bearings, a tight interference fit is required. The document describes heating methods, such as using a tank of heated oil or induction heating, to expand the bearing for easy mounting. It advises on temperature limits and timing to ensure proper installation.
For cylindrical bore bearings, a tight interference fit is required. The document describes heating methods, such as using a tank of heated oil or induction heating, to expand the bearing for easy mounting. It advises on temperature limits and timing to ensure proper installation.
Installation and Temperature Management
To ensure proper bearing installation, the bearing should be positioned squarely against the shoulder while hot. Lockwashers and locknuts or clamping plates are used to secure the bearing. As the bearing cools, these should be tightened. For outer ring rotation, the housing can be expanded by heating. The bearing should not contact the heat source directly, and a screen should separate it from the bottom of the tank to avoid excessive temperature that could reduce ring hardness. Flame-type burners with automatic temperature control are recommended. If open heated oil baths are not allowed, a 15% soluble-oil water mixture can be used, heated up to 93°C (200°F).
To ensure proper bearing installation, the bearing should be positioned squarely against the shoulder while hot. Lockwashers and locknuts or clamping plates are used to secure the bearing. As the bearing cools, these should be tightened. For outer ring rotation, the housing can be expanded by heating. The bearing should not contact the heat source directly, and a screen should separate it from the bottom of the tank to avoid excessive temperature that could reduce ring hardness. Flame-type burners with automatic temperature control are recommended. If open heated oil baths are not allowed, a 15% soluble-oil water mixture can be used, heated up to 93°C (200°F).
Installation Procedures
For tight fit inner rings, assembly depends on whether the bearing has a cylindrical or tapered bore. Cleanliness is crucial, and the environment should be free from dust and moisture. All components should be cleaned and checked against specifications for dimensional accuracy. Shaft surfaces must be clean and free from nicks and burrs, with specific finish requirements depending on the application.
For tight fit inner rings, assembly depends on whether the bearing has a cylindrical or tapered bore. Cleanliness is crucial, and the environment should be free from dust and moisture. All components should be cleaned and checked against specifications for dimensional accuracy. Shaft surfaces must be clean and free from nicks and burrs, with specific finish requirements depending on the application.
Mounting Methods
The arbor press method is used for smaller bearings, involving pressing the bearing onto the shaft or into the housing using a mounting tube. The tube should be made from soft steel and be slightly larger than the shaft. For tapered bore spherical roller bearings, a feeler gauge is used to measure RIC before installation. The bearing is lubricated and slid onto the shaft, with the locknut tightened to achieve the proper interference fit.
The arbor press method is used for smaller bearings, involving pressing the bearing onto the shaft or into the housing using a mounting tube. The tube should be made from soft steel and be slightly larger than the shaft. For tapered bore spherical roller bearings, a feeler gauge is used to measure RIC before installation. The bearing is lubricated and slid onto the shaft, with the locknut tightened to achieve the proper interference fit.
Shaft and Housing Fits
Tables provide guidelines for specifying shaft and housing fits based on operating conditions. Different fits are recommended depending on load conditions and application requirements. For example, a P6 fit is used for rotating outer ring loads, while an s4 fit is used for centrifugal force load applications.
Tables provide guidelines for specifying shaft and housing fits based on operating conditions. Different fits are recommended depending on load conditions and application requirements. For example, a P6 fit is used for rotating outer ring loads, while an s4 fit is used for centrifugal force load applications.
Fitting Practice Tables
These tables offer detailed specifications for shaft tolerances and fits, providing maximum and minimum values for various shaft diameters and fit types. These guidelines ensure proper bearing performance and longevity.
These tables offer detailed specifications for shaft tolerances and fits, providing maximum and minimum values for various shaft diameters and fit types. These guidelines ensure proper bearing performance and longevity.
Specifications:
The document discusses the operating temperatures and material limitations of Timken spherical roller bearings. Standard bearing steels maintain a minimum hardness of 58 HRC up to 120 °C (250 °F). Timken bearings are dimensionally stabilized for various temperature ranges, with spherical roller bearings stabilized up to 200 °C (392 °F). Stability designations (S0 to S4) indicate maximum operating temperatures from 150 °C (302 °F) to 350 °C (662 °F).
The document discusses the operating temperatures and material limitations of Timken spherical roller bearings. Standard bearing steels maintain a minimum hardness of 58 HRC up to 120 °C (250 °F). Timken bearings are dimensionally stabilized for various temperature ranges, with spherical roller bearings stabilized up to 200 °C (392 °F). Stability designations (S0 to S4) indicate maximum operating temperatures from 150 °C (302 °F) to 350 °C (662 °F).
Procedures:
Heat generation and dissipation are critical for bearing performance. Heat generation is calculated using the formula Qgen = k4n M, where torque and speed are factors. Heat dissipation involves conduction, convection, and radiation, with circulating oil systems playing a significant role.
Heat generation and dissipation are critical for bearing performance. Heat generation is calculated using the formula Qgen = k4n M, where torque and speed are factors. Heat dissipation involves conduction, convection, and radiation, with circulating oil systems playing a significant role.
Norms and Standards:
The document references DIN Standard 623 for bearing stability designations. It also provides guidelines for material selection based on ASTM standards for various operating temperatures.
The document references DIN Standard 623 for bearing stability designations. It also provides guidelines for material selection based on ASTM standards for various operating temperatures.
Recommendations:
Bearings should operate within specified temperature limits to avoid damage. Lubrication is essential for minimizing friction and transferring heat. Oil is recommended for high-speed or high-temperature applications, while grease simplifies seal design and requires less frequent lubrication.
Bearings should operate within specified temperature limits to avoid damage. Lubrication is essential for minimizing friction and transferring heat. Oil is recommended for high-speed or high-temperature applications, while grease simplifies seal design and requires less frequent lubrication.
Tables and Data:
Table 13 lists stability designations and maximum operating temperatures. Table 14 provides chemical compositions and hardness recommendations for bearing materials. Table 15 outlines operating temperatures for cages, shields, and seals. Table 16 offers coefficients for torque equations, and Table 17 compares the advantages of oil and grease lubrication.
Table 13 lists stability designations and maximum operating temperatures. Table 14 provides chemical compositions and hardness recommendations for bearing materials. Table 15 outlines operating temperatures for cages, shields, and seals. Table 16 offers coefficients for torque equations, and Table 17 compares the advantages of oil and grease lubrication.
Critical Information:
Operating temperatures affect lubricant film thickness and bearing life. Equipment designers must consider temperature effects on equipment performance. Prototype testing is advised to define operating temperature ranges. For temperatures exceeding standard limits, consult a Timken engineer for high-temperature steel options.
Operating temperatures affect lubricant film thickness and bearing life. Equipment designers must consider temperature effects on equipment performance. Prototype testing is advised to define operating temperature ranges. For temperatures exceeding standard limits, consult a Timken engineer for high-temperature steel options.
Lubrication Systems Overview
Oil lubrication systems are essential for maintaining the efficiency and longevity of bearings. The document outlines three primary systems: oil bath, circulating system, and oil-mist lubrication, each suited for specific applications.
Oil lubrication systems are essential for maintaining the efficiency and longevity of bearings. The document outlines three primary systems: oil bath, circulating system, and oil-mist lubrication, each suited for specific applications.
Oil Bath System
This system involves a sump where the bearing's rolling elements pass through oil. The oil level should not exceed the center of the lowest rolling element to prevent churning, especially at high speeds.
This system involves a sump where the bearing's rolling elements pass through oil. The oil level should not exceed the center of the lowest rolling element to prevent churning, especially at high speeds.
Circulating System
Advantages include adequate oil supply for cooling and lubrication, metered oil delivery, contaminant removal, suitability for multiple bearings, and extended lubricant life. It typically consists of a reservoir, pump, piping, and filter, with a possible heat exchanger.
Advantages include adequate oil supply for cooling and lubrication, metered oil delivery, contaminant removal, suitability for multiple bearings, and extended lubricant life. It typically consists of a reservoir, pump, piping, and filter, with a possible heat exchanger.
Oil-Mist Lubrication
Used in high-speed applications, this system allows precise control of lubricant quantity. It involves atomizing oil with compressed air, ensuring adequate lubrication and preventing contaminants from entering the system.
Used in high-speed applications, this system allows precise control of lubricant quantity. It involves atomizing oil with compressed air, ensuring adequate lubrication and preventing contaminants from entering the system.
Types of Oils
Oils are categorized into petroleum and synthetic types. Petroleum oils are common for most applications, while synthetic oils, such as polyalphaolefins and silicones, are used in extreme temperatures due to their stability.
Oils are categorized into petroleum and synthetic types. Petroleum oils are common for most applications, while synthetic oils, such as polyalphaolefins and silicones, are used in extreme temperatures due to their stability.
Viscosity Considerations
Oil viscosity selection depends on load, speed, and environmental factors. High-viscosity oils are for low-speed or high-temperature applications, while low-viscosity oils suit high-speed or low-temperature conditions. The document compares ISO/ASTM and SAE viscosity classifications.
Oil viscosity selection depends on load, speed, and environmental factors. High-viscosity oils are for low-speed or high-temperature applications, while low-viscosity oils suit high-speed or low-temperature conditions. The document compares ISO/ASTM and SAE viscosity classifications.
Grease Lubrication
Grease is used for low-to-moderate speed applications. It consists of a base oil, thickening agent, and additives. Different thickeners, such as lithium and calcium, offer varying properties like water resistance and temperature stability.
Grease is used for low-to-moderate speed applications. It consists of a base oil, thickening agent, and additives. Different thickeners, such as lithium and calcium, offer varying properties like water resistance and temperature stability.
Contamination and Maintenance
Contaminants like abrasive particles can cause bearing damage. Maintaining clean lubrication systems is crucial to prevent wear and extend bearing life.
Contaminants like abrasive particles can cause bearing damage. Maintaining clean lubrication systems is crucial to prevent wear and extend bearing life.
Water and Moisture Impact on Bearings
Water and moisture can significantly damage bearings. While some lubricating greases offer protection, water-soluble greases like sodium-soap should be avoided in wet conditions. Water in lubricating oils can reduce bearing fatigue life by causing etching and promoting corrosion and hydrogen embrittlement in micro-cracks.
Water and moisture can significantly damage bearings. While some lubricating greases offer protection, water-soluble greases like sodium-soap should be avoided in wet conditions. Water in lubricating oils can reduce bearing fatigue life by causing etching and promoting corrosion and hydrogen embrittlement in micro-cracks.
Grease Selection
The choice of bearing grease depends on its physical and chemical properties, application, and environmental conditions. Grease should maintain consistency at operating temperatures without thickening or separating. It should be smooth, non-fibrous, and free from chemically active ingredients. Consultation with a lubricant supplier or Timken engineer is recommended for specific applications.
The choice of bearing grease depends on its physical and chemical properties, application, and environmental conditions. Grease should maintain consistency at operating temperatures without thickening or separating. It should be smooth, non-fibrous, and free from chemically active ingredients. Consultation with a lubricant supplier or Timken engineer is recommended for specific applications.
Timken Lubricants
Timken offers application-specific lubricants designed for demanding industrial operations. These lubricants include high-temperature, anti-wear, and water-resistant additives. A selection guide is available, but it should not replace equipment builder specifications.
Timken offers application-specific lubricants designed for demanding industrial operations. These lubricants include high-temperature, anti-wear, and water-resistant additives. A selection guide is available, but it should not replace equipment builder specifications.
Grease Use Guidelines
Proper grease quantity is crucial; too little can starve the bearing, while too much can cause churning and excessive temperatures. Bearings should be relubricated regularly, and grease should be packed to ensure it reaches between rolling elements. The relubrication cycle depends on operating temperature and sealing efficiency.
Proper grease quantity is crucial; too little can starve the bearing, while too much can cause churning and excessive temperatures. Bearings should be relubricated regularly, and grease should be packed to ensure it reaches between rolling elements. The relubrication cycle depends on operating temperature and sealing efficiency.
Grease Consistency
Grease consistency varies and is measured by penetration number. The National Lubricating Grease Institute (NLGI) classifies grease consistency, which can change when sheared.
Grease consistency varies and is measured by penetration number. The National Lubricating Grease Institute (NLGI) classifies grease consistency, which can change when sheared.
Grease Compatibility
Mixing greases can lead to improper lubrication. A compatibility chart is provided to guide grease selection.
Mixing greases can lead to improper lubrication. A compatibility chart is provided to guide grease selection.
Grease Lubrication for Bearing/Housing Assemblies
Polyurea and lithium-based greases are preferred for general-purpose lubrication, especially in high moisture environments. Grease should be selected based on its consistency at operating temperatures and should not thicken or separate.
Polyurea and lithium-based greases are preferred for general-purpose lubrication, especially in high moisture environments. Grease should be selected based on its consistency at operating temperatures and should not thicken or separate.
Multi-Purpose Industrial Grease
These greases are suitable for many Timken bearing applications. Special considerations are needed for extreme conditions. Lithium, lithium complex, or calcium sulfonate greases are recommended for most applications.
These greases are suitable for many Timken bearing applications. Special considerations are needed for extreme conditions. Lithium, lithium complex, or calcium sulfonate greases are recommended for most applications.
Application Considerations
For high-speed applications, a lighter base oil viscosity is recommended, while lower-speed applications may require a heavier viscosity. For high-temperature operations, consultation with a Timken engineer is advised.
For high-speed applications, a lighter base oil viscosity is recommended, while lower-speed applications may require a heavier viscosity. For high-temperature operations, consultation with a Timken engineer is advised.
Specifications and Procedures:
For industrial applications, the bearing void should be filled 100% and the housing void 40-60%. For high-speed applications, the bearing void should be filled 100% and the housing void 30-40%. The free volume of the bearing is estimated by calculating the 'solid ring' volume, weighing the bearing, and dividing by the density of steel. The grease volume is determined by multiplying the free volume by the grease density. Apply 75% of the grease to the cage and roller assembly, and the remainder to the inner and outer rings. Preservatives on bearing components are compatible with most industrial greases.
For industrial applications, the bearing void should be filled 100% and the housing void 40-60%. For high-speed applications, the bearing void should be filled 100% and the housing void 30-40%. The free volume of the bearing is estimated by calculating the 'solid ring' volume, weighing the bearing, and dividing by the density of steel. The grease volume is determined by multiplying the free volume by the grease density. Apply 75% of the grease to the cage and roller assembly, and the remainder to the inner and outer rings. Preservatives on bearing components are compatible with most industrial greases.
Spherical Roller Bearings:
Timken spherical roller bearings are designed for high radial loads and consistent performance under misalignment, marginal lubrication, contamination, extreme speeds, and critical stresses. They feature superior design, reliable performance, and comprehensive technical support.
Timken spherical roller bearings are designed for high radial loads and consistent performance under misalignment, marginal lubrication, contamination, extreme speeds, and critical stresses. They feature superior design, reliable performance, and comprehensive technical support.
Nomenclature and Modification Codes:
The catalog provides detailed nomenclature for identifying bearings, including bore size and modification codes. Common codes include tapered bore (K), steel cage (EJ), brass cage (EM/YM), and various radial internal clearances (C2, C3, C4, etc.).
The catalog provides detailed nomenclature for identifying bearings, including bore size and modification codes. Common codes include tapered bore (K), steel cage (EJ), brass cage (EM/YM), and various radial internal clearances (C2, C3, C4, etc.).
Technical Data:
Technical data such as shaft and housing fits, internal clearances, and tolerances are available in the engineering section of the catalog and the Timken Engineering Manual. Bearings with tapered bores for adapter-type mounting can be ordered with the suffix 'K'.
Technical data such as shaft and housing fits, internal clearances, and tolerances are available in the engineering section of the catalog and the Timken Engineering Manual. Bearings with tapered bores for adapter-type mounting can be ordered with the suffix 'K'.
Load Ratings and Dimensions:
The catalog lists bearing part numbers, dimensions, load ratings, cage types, mounting data, and equivalent radial load factors. It also includes thermal speed ratings and weights for various bearings.
The catalog lists bearing part numbers, dimensions, load ratings, cage types, mounting data, and equivalent radial load factors. It also includes thermal speed ratings and weights for various bearings.
Key Tables and Figures:
Tables provide modification codes and equivalence between current ISO and old ABMA part numbering. Figures illustrate nomenclature and equivalence between part numbers.
Tables provide modification codes and equivalence between current ISO and old ABMA part numbering. Figures illustrate nomenclature and equivalence between part numbers.
Overview: The document is a technical catalog from Timken, focusing on spherical roller bearings and their specifications. It includes detailed information on bearing dimensions, load ratings, cage types, mounting data, and other technical parameters.
Specifications: The catalog provides a comprehensive list of spherical roller bearings with details such as bore diameter, outer diameter, width, dynamic and static load ratings, and maximum fillet radius. It also includes equivalent radial load factors and geometry factors for lubrication life.
Procedures: Instructions for using the bearings, including mounting data and thermal speed ratings, are provided. The document references the Timken Engineering Manual for further guidance on calculations and usage.
Standards and Recommendations: The catalog emphasizes the importance of consulting the Timken Engineering Manual for detailed instructions on shaft and housing fits, internal clearances, and tolerances. It also advises consulting Timken engineers for up-to-date information on bearing availability.
Key Data from Tables: The tables list various bearing part numbers along with their dimensions and load ratings. They also provide information on the type of cage used and the thermal speed ratings for oil and grease lubrication.
Additional Features: The document mentions the availability of bearings with tapered bores for adapter-type mounting and provides guidance on ordering these variants.
Conclusion: This catalog serves as a detailed reference for selecting and using Timken spherical roller bearings, providing essential technical data and recommendations for optimal performance.
Introduction
Timken's engineering and manufacturing capabilities in heavy-duty pillow blocks offer significant user benefits. The company provides expert engineering assistance for applications involving large shaft sizes, such as BOF trunnions, bridge blocks, and ball mills. Timken's pillow blocks are suitable for various applications, including conveyors, mining, cement, casters, rolling mills, and heavy movable structures.
Timken's engineering and manufacturing capabilities in heavy-duty pillow blocks offer significant user benefits. The company provides expert engineering assistance for applications involving large shaft sizes, such as BOF trunnions, bridge blocks, and ball mills. Timken's pillow blocks are suitable for various applications, including conveyors, mining, cement, casters, rolling mills, and heavy movable structures.
Design and Construction
Timken supplies pillow blocks with either tapered bore bearings with adapters for straight shafts or cylindrical bore bearings for shouldered shafts. The split construction allows for convenient assembly and disassembly, featuring pry-tool slots and the Pry-Lug fulcrum for easy bearing inspection, service, and replacement. The pillow blocks are made from high-grade, stress-relieved cast iron or cast steel and are designed for four-bolt mounting, with some smaller sizes available for two-bolt mounting.
Timken supplies pillow blocks with either tapered bore bearings with adapters for straight shafts or cylindrical bore bearings for shouldered shafts. The split construction allows for convenient assembly and disassembly, featuring pry-tool slots and the Pry-Lug fulcrum for easy bearing inspection, service, and replacement. The pillow blocks are made from high-grade, stress-relieved cast iron or cast steel and are designed for four-bolt mounting, with some smaller sizes available for two-bolt mounting.
Mounting Options
Timken offers two mounting options: adapter vs. straight bore. Adapter-mounted spherical roller bearings allow for flexibility in axial positioning and accommodate light locational thrust loads. Straight bore mounting is recommended for applications with heavy thrust loads or requiring exact axial location. Timken pillow block assemblies are available in various series for both mounting types.
Timken offers two mounting options: adapter vs. straight bore. Adapter-mounted spherical roller bearings allow for flexibility in axial positioning and accommodate light locational thrust loads. Straight bore mounting is recommended for applications with heavy thrust loads or requiring exact axial location. Timken pillow block assemblies are available in various series for both mounting types.
Fixed and Float Pillow Blocks
Timken pillow blocks can be installed in either fixed or float positions. The fixed position uses a stabilizing ring to prevent axial movement, while the float position allows for axial movement to compensate for thermal expansion or contraction.
Timken pillow blocks can be installed in either fixed or float positions. The fixed position uses a stabilizing ring to prevent axial movement, while the float position allows for axial movement to compensate for thermal expansion or contraction.
Closed-End Installations
For applications where the shaft end terminates inside the pillow block, end-closure inserts are available to seal out contaminants and retain lubricant. A minimum clearance is suggested between the shaft end and the closure to accommodate thermal expansion.
For applications where the shaft end terminates inside the pillow block, end-closure inserts are available to seal out contaminants and retain lubricant. A minimum clearance is suggested between the shaft end and the closure to accommodate thermal expansion.
Lubrication
Timken pillow block housings are designed for grease and oil-bath lubrication and can be modified for circulating oil or oil/air-mist systems. A lubrication groove and oil holes in the bearing outer ring ensure proper lubrication distribution.
Timken pillow block housings are designed for grease and oil-bath lubrication and can be modified for circulating oil or oil/air-mist systems. A lubrication groove and oil holes in the bearing outer ring ensure proper lubrication distribution.
Seals
Timken pillow blocks come with precision triple-ring labyrinth seals to exclude foreign matter and retain lubricants. For highly contaminated environments, the DUSTAC® seal offers additional protection.
Timken pillow blocks come with precision triple-ring labyrinth seals to exclude foreign matter and retain lubricants. For highly contaminated environments, the DUSTAC® seal offers additional protection.
Load Ratings and Life
Load ratings for spherical roller bearings in pillow blocks are provided in the catalog, with life calculation formulas available in the Engineering Manual. The load rating figures apply when the load direction is toward the base of the pillow block.
Load ratings for spherical roller bearings in pillow blocks are provided in the catalog, with life calculation formulas available in the Engineering Manual. The load rating figures apply when the load direction is toward the base of the pillow block.
Inch Tapered Bore Mounting
The catalog provides detailed specifications for ordering complete pillow block assemblies, including housing cap and base, cap bolts, bearing, bearing adapter, locknut, lockwasher, stabilizing ring, and triple-ring seals. Assemblies are available in cast iron or cast steel, with four-bolt bases as standard.
The catalog provides detailed specifications for ordering complete pillow block assemblies, including housing cap and base, cap bolts, bearing, bearing adapter, locknut, lockwasher, stabilizing ring, and triple-ring seals. Assemblies are available in cast iron or cast steel, with four-bolt bases as standard.
Overview: This document is a technical catalog from Timken, detailing specifications and ordering information for spherical roller bearing pillow blocks, specifically the SDAF231 and SDAF232 series. It includes information on assembly components, ordering instructions, and specifications for both fixed and float units.
Specifications: The catalog provides detailed specifications for various bearing numbers, including locknut, lockwasher, housing, stabilizing ring, triple seal, and assembly weight. It specifies that all assemblies are furnished in cast iron, with an option for cast steel by adding an 'S' to the alpha prefix.
Ordering Instructions: To order float units, the part number should be followed by the suffix 'Float' or 'FL.' For fixed applications, both stabilizing rings must be used, whereas they should not be used for float mounting. The document also provides instructions for ordering pillow block housing only.
Dimensions and Tolerances: The document includes tables with dimensions for pillow block assemblies and suggested shaft diameters with maximum and minimum tolerances. It emphasizes the importance of selecting the proper take-up unit based on load requirements.
Take-Up Units: The catalog details the specifications for TU and TTU take-up units, including frame assembly, adjusting screw materials, and sealing options. It highlights the importance of evaluating load requirements before specifying a take-up assembly.
Sealing Options: The document describes the DUSTAC shaft seal, which includes a compressed neoprene ring and a V-ring face seal to protect against contaminants. It provides a table with pillow block housing numbers and corresponding seal assembly components.
Specifications:
The document provides detailed specifications for various EPS models, including dimensions and part numbers. It lists the sizes and corresponding components for each model, such as shaft seals and pillow block housings.
The document provides detailed specifications for various EPS models, including dimensions and part numbers. It lists the sizes and corresponding components for each model, such as shaft seals and pillow block housings.
Order Instructions:
Instructions are provided for ordering shaft seals and pillow block housings with specific configurations. The document explains how to add suffixes to part numbers to specify desired features, such as DUSTAC shaft seals.
Instructions are provided for ordering shaft seals and pillow block housings with specific configurations. The document explains how to add suffixes to part numbers to specify desired features, such as DUSTAC shaft seals.
Installation Procedure:
A step-by-step guide is included for installing shaft seals and bearings. Key steps involve checking shaft diameters, positioning V-ring seals, and ensuring proper alignment and compression of components.
A step-by-step guide is included for installing shaft seals and bearings. Key steps involve checking shaft diameters, positioning V-ring seals, and ensuring proper alignment and compression of components.
Inch DUSTAC Shaft Seal:
The DUSTAC shaft seal is recommended for use in contaminated environments. It offers enhanced protection against contaminants and extends bearing life. The seal features a V-shaped nitrile ring that rotates with the shaft.
The DUSTAC shaft seal is recommended for use in contaminated environments. It offers enhanced protection against contaminants and extends bearing life. The seal features a V-shaped nitrile ring that rotates with the shaft.
Sine Bar Gages:
The document describes the use of sine bar gages for measuring tapered shafts. It lists available sizes and explains the importance of accurate shaft taper measurement to prevent premature bearing wear.
The document describes the use of sine bar gages for measuring tapered shafts. It lists available sizes and explains the importance of accurate shaft taper measurement to prevent premature bearing wear.
Spherical Roller Bearing Accessories:
Timken offers a range of accessories for spherical roller bearings, including adapter sleeves, locknuts, and lockwashers. These accessories are designed to ensure a secure fit and facilitate installation and removal.
Timken offers a range of accessories for spherical roller bearings, including adapter sleeves, locknuts, and lockwashers. These accessories are designed to ensure a secure fit and facilitate installation and removal.
Nomenclature:
The document provides a detailed nomenclature for various accessories, including prefixes and suffixes used to describe different types of sleeves and locking devices.
The document provides a detailed nomenclature for various accessories, including prefixes and suffixes used to describe different types of sleeves and locking devices.
Tables and Figures:
Several tables list part numbers, sizes, and compatible bearings for different components. Figures illustrate design features and parts of sine gages.
Several tables list part numbers, sizes, and compatible bearings for different components. Figures illustrate design features and parts of sine gages.
Overview: The document provides detailed specifications for SNW and SNP pull-type sleeve assemblies used in mounting tapered bore bearings on shafts. These assemblies include components such as sleeves, locknuts, lockwashers, and lockplates.
Specifications: The document lists various bearing numbers along with their corresponding accessory numbers, shaft dimensions, adapter dimensions, and assembly weights. The dimensions are provided in inches, and the tolerance range is specified for each bearing size.
Key Components:
- SNW Assembly: Comprises a sleeve, locknut, and lockwasher.
- SNP Assembly: Comprises a sleeve, locknut, and lockplate.
Data Summary: The tables provide a comprehensive list of dimensions for each bearing series, including:
- Bearing Number: Identifies the specific bearing model.
- Accessory Numbers: Lists the corresponding sleeve, locknut, and lockwasher/lockplate numbers.
- Shaft Dimensions: Includes diameter and tolerance.
- Adapter Dimensions: Specifies dimensions B2, S, and D1.
- Assembly Weight: Provides the weight of the assembly in pounds.
Important Notes:
- Bold shaft sizes indicate standard sizes. Non-standard accessories require specification of shaft size when ordering.
- Tolerance range is from +0 to the value listed.
Overview: This document is a technical catalog from Timken, detailing specifications and dimensions for spherical roller bearing accessories, specifically focusing on pull-type and push-type sleeves used in mounting tapered bore bearings on shafts.
Sections:
- Specifications: The document provides detailed specifications for various bearing numbers, including accessory numbers, shaft dimensions, adapter dimensions, and assembly weights. It includes both inch and metric measurements.
- Procedures: Instructions are provided for ordering non-standard accessories, emphasizing the need to specify shaft size when deviating from standard sizes.
- Standards and Tolerances: The document outlines tolerance ranges for shaft diameters, indicating a range from +0 to a specified negative value, ensuring precision in fitting and assembly.
- Recommendations: The document suggests using standard shaft sizes for ease of ordering and compatibility with existing components.
Key Data from Tables:
- Pull-Type Sleeves: The tables list dimensions for SNW and SNP assemblies, which include a sleeve, locknut, and either a lockwasher or lockplate. The tables provide detailed measurements for each component, ensuring proper fit and function.
- Push-Type Sleeves: Similar tables are provided for push-type sleeves, detailing the dimensions and weights of the sleeves, locknuts, and lockwashers, along with removal nuts for ease of disassembly.
Critical Information:
- Exigencies: The document stresses the importance of adhering to specified tolerances to ensure the proper functioning of the bearings and associated components.
- Parameters: Detailed parameters for each bearing and accessory are provided, including diameter, pitch, and length measurements.
- Limitations: The document notes the limitations in terms of tolerance ranges and the necessity of specifying shaft sizes for non-standard orders.
- Best Practices: It is recommended to use standard sizes where possible to facilitate easier ordering and compatibility with existing systems.
Overview: This document is a technical catalog from Timken, detailing specifications for spherical roller bearing assemblies, including mounting sleeves, locknuts, and lockwashers or lockplates. It provides comprehensive data on metric and inch adapter sleeves used in bearing assemblies.
Specifications: The document lists various adapter sleeves with their corresponding dimensions and specifications. Key parameters include sleeve part number, length (L), thread type and size, diameter (D3), weight, and compatible locknuts, lockwashers, lockplates, and hydraulic nuts. The thread type is specified as either metric (M) or trapezoid (Tr), with dimensions indicating the major diameter and pitch.
Procedures and Recommendations: The document advises consulting a Timken engineer for dimensions not listed and notes that sleeves are not sold separately. It emphasizes the importance of using the correct locknuts and lockwashers or lockplates for effective assembly.
Data Summary: The tables provide detailed measurements for each sleeve type, including the weight in kilograms and the appropriate hydraulic nut for installation. The document covers a range of sleeve sizes, from smaller diameters (e.g., 20 mm) to larger ones (e.g., 450 mm), accommodating various shaft sizes and bearing requirements.
Critical Information: The document highlights that adapter sleeves are supplied complete with locknuts and lockwashers or lockplates, ensuring a secure fit in bearing assemblies. It also specifies that the sleeves are designed for effective tapered bore bearing assembly.
See more
Catalog excerpts
TIMKEN Where You Turn
Open the catalog to page 1
TIMKEN OVERVIEW TIMKEN. WHERE YOU TURN. Turn to Timken to move ahead of the comptition and stand out as a leader in your industry. When you turn to us, you receive more than high-quality products and services; you acquire a worldwide team of highly trained and experienced associates, eager to help you keep production rates high and downtime low. Whether it is a wheel assembly for a family vehicle, bearings outfitted for a deep-sea oil drilling rig, repair services for rail bearings or steel for an aircraft engine shaft, we supply the products and services you need that help keep the world turning....
Open the catalog to page 3
TIMKEN OVERVIEW TECHNOLOGY THATMOVES YOU Innovation is one of our core values, and we're known for our ability to solve engineering challenges. We focus on improving performance in the most difficult applications, and we're passionate about creating technical solutions and services that help your equipment perform faster, harder, smoother and more efficiently. To do this, we invest in: People, attracting and hiring scholars, engineers and specialists from across the globe who are experts in mechanical power transmission, antifriction bearing design, tribology, metallurgy, clean steel production,...
Open the catalog to page 4
TIMKEN OVERVIEW A BRAND YOU CAN TRUST L The Timken brand stands for quality, innovation and dependability. I We take pride in the quality of our work, and you gain I the peace-of-mind of knowing that each box contains an industry-trusted product. As our founder Henry Timken I said, "Don't set your name to anything you will ever have " cause to be ashamed of." F We continue this mindset through the Timken Quality ' Management System (TQMS). With TQMS, we promote continuous quality improvements in our products and services to our global oprations and supply chain networks. It helps us ensure that...
Open the catalog to page 5
TIMKEN OVERVIEW ABOUTTHIS MANUAL 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 for the special needs of your application. USING THIS MANUAL We are committed to providing our customers with maximum service and quality. This publication contains dimensions, tolerances and load ratings as well as an engineering section describing fitting practices for shafts and housings, internai clearances, materials and...
Open the catalog to page 6
TIMKEN OVERVIEW SHELF LIFE AND STORAGE OF GREASE-LUBRICATED BEARINGS AND Timken guidelines for the shelf life of grease-lubricated rolling bearings, components and assemblies are set forth below. Shelf life information is based on test data and experience. Shelf life should be distinguished from lubricated bearing/ component design life as follows: SHELF LIFE POLICY Shelf life of the grease-lubricated bearing/component represents the period of time prior to use or installation. The shelf life is a portion of the anticipated aggregate design life. It is impossible to accurately predict design...
Open the catalog to page 7
TIMKEN OVERVIEW Most bearing types are typically shipped protected with a corrosion-preventive compound that is not a lubricant. Such bearings may be used in oil-lubricated applications without removal of the corrosion-preventive compound. When using some specialized grease lubrications, it is advisable to remove the corrosion-preventive compound before packing the bearings with suitable grease. Some bearing types in this catalog are prepacked with general purpose grease suitable for their normal application. Frequent replenishment of the grease may be necessary for optimum performance. Care...
Open the catalog to page 8
SPHERICAL ROLLER BEARING INTRODUCTION Gearboxes Casters tes, including shakeers screens Timken high-quality bearings can be put to work in any application where Heavy ^tioiwy industria| rjoirv^yoi- systems spherical roller bearings can be specified. Some of these applications are: lndustria| fans 8 TIMKEN SPHERICAL ROLLER BEARING CATALOG
Open the catalog to page 9
SPHERICAL ROLLER BEARING INTRODUCTION TIMKEN® SPHERICAL ROLLER BEARINGS - OFFERING SELECTION AND SUPERIOR PERFORMANCE Your success dpends on the performance of your equipment, especially when it faces harsh environments and high radial loads. To help keep uptime high and downtime low, turn to Timken® spherical roller bearings. These bearings are your best choice when conditions include heavy loads, when you have difficulties in establishing or maintaining housing alignment, or when shaft deflection can be expected. PRODUCT OFFERING Our spherical roller bearing product line is one of the broadest...
Open the catalog to page 10
SPHERICAL ROLLER BEARING INTRODUCTION TIMKEN® SPHERICAL ROLLER BEARINGS - OFFERING SELECTION AND SUPERIOR PERFORMANCE ■ continued C QUALITY SOLUTIONS As the only premium bearing manufacturer to also make super-clean, high-alloy bearing steels, we understand the critical quality link between materials and product performance. We also strictly adhere to the Timken Quality Management System in every plant worldwide, so each bearing product meets the same high performance standards - no matter where in the world it is manufactured. DEPENDABLE SERVICE Every Timken spherical roller bearing is backed...
Open the catalog to page 11
ENGINEERING ENGINEERING The following topics are covered within this engineering section: Spherical roller bearing design types. Օ Cage design types. ► Fitting practice and mounting recommendations. Lubrication recommendations. This engineering section is not intended to be comprehensive, but does serve as a useful guide in spherical roller bearing selection. To view the complete engineering catalog, please visit www.timken.com. To order the catalog, please contact your Timken engineer and request a copy of the Timken Engineering Manual, order number 10424. TIMKEN SPHERICAL ROLLER BEARING CATALOG...
Open the catalog to page 12
ENGINEERING BEARING TYPES AND CAGES RADIAL SPHERICAL ROLLER BEARING The principle styles of radial spherical roller bearings that Timken offers are: <400 mm outer diameter: EJ, EM and EMB Օ >400 mm outer diameter: YM, YMB, YMD and YP Above suffixes correspond to different types of designs depending on a bearing size and geometry. Main differences are the cage type used in the assembly. Spherical roller bearings with an EJ cage suffix are fitted with a stamped-steel cage. YM/EM/YMB and YMD suffixes are used with brass cage designs. YP is a pin-type cage specific for large diameter bearings. The...
Open the catalog to page 13All TIMKEN Europe catalogs and technical brochures
Grease Interchange Guide1 Page
MAINTENANCE TOOLS16 Pages
Tapered Roller Bearing Catalog760 Pages
COMMERCIAL VEHICLE BEARING CATALOGUE745 Pages
INDUSTRIAL POWER TRANSMISSION BELTS364 Pages
Drive Engineer™ Web App2 Pages
Timken Safety End Caps2 Pages
HOUSED UNITS2 Pages
491A Disk Harrow Unit2 Pages
Deep Groove Ball Bearings32 Pages
National Indust Seals Catalog716 Pages
Industrial Seal Catalog389 Pages
ECOTURN LABYRINTH SEAL2 Pages
VHIN 6002 Pages
VHIN 5502 Pages
VHIS 4002 Pages
VHIS 2002 Pages
VHIS 1502 Pages
VHIS 1002 Pages
VHIS 752 Pages
VHIS 352 Pages
VHIN 332 Pages
VHIN 102 Pages
Maintenance-Tool-Catalog16 Pages
M9 Modular Magnetic Encoder2 Pages
MPS1602 Pages
Thrust Bearings2 Pages
M11 MODULAR MAGNETIC ENCODER2 Pages
UC-SERIES2 Pages
EMA Series Brochure16 Pages
Deep Groove Ball Bearing40 Pages
Large Bore Industrial Seal Catalog388 Pages
Timken Metals Product Catalog220 Pages
Timken Drives Roller Chain Catalog112 Pages
Timken SAF Housed Unit Catalog126 Pages
Timken Ball Housed Unit Catalog180 Pages
Timken® SNT Plummer Block Catalog120 Pages
NSC Info Section34 Pages
Timken Type E Housed Unit40 Pages
Quick-Flex Coupling64 Pages
Spherical Bearing2 Pages
Timken AP-2 Bearing2 Pages
AP? Bearing Product Sheet2 Pages
ADAPT Bearing Product Sheet2 Pages
ROLLER BEARING OFFERING6 Pages
Spherical Roller Bearing Catalog200 Pages
Cylindrical Roller Bearing Catalog108 Pages
Commercial Vehicle Catalog417 Pages
Timken Thrust & Plain Bearings40 Pages
Timken Ball Bearings217 Pages
Medium-Duty Application37 Pages
Industrial Maintenance Manual157 Pages
Mechanical Puller Catalog20 Pages
BALL BEARINGS218 Pages
ROLLER BEARINGS476 Pages
Engineering176 Pages
Archived catalogs
IsoClass Bearings8 Pages
Maintenance Tools16 Pages
Industrial Products56 Pages
Related Searches
- TIMKEN steel bearing
- Synthetic lubricant
- Flexible coupling
- TIMKEN ball bearing
- Shaft shaft coupling
- TIMKEN radial bearing
- Anti-corrosion lubricant
- Bearing lubricant
- Flange coupling
- TIMKEN single-row bearing
- High-temperature lubricant
- TIMKEN precision bearing
- Plain bearing
- Rigid coupling
- TIMKEN axial bearing
- TIMKEN bearing unit
- Universal lubricant
*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.