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KOYO BEARINGS VIERZON MAROMME (GROUPE JTEKT)
B2004E Ceramic & EXSEV

B2004E Ceramic & EXSEV

Product catalog summary

Overview: This document is a technical catalogue for bearings and ceramic bearings designed for extreme special environments, produced by JTEKT. It outlines the specifications, applications, and characteristics of these bearings, emphasizing their use in challenging conditions such as clean rooms, vacuums, high temperatures, and corrosive environments.

1. Products and Applications: The catalogue introduces the EXSEV Bearing Series, which includes ceramic and special steel bearings. These are tailored for environments where conventional bearings are inadequate, offering properties like non-magnetism, insulation, and high-speed performance. The document highlights the importance of these bearings in advanced technologies and their contribution to environmental conservation and energy efficiency.

2. Development and Manufacturing Facilities: JTEKT's commitment to innovation is supported by state-of-the-art facilities, including ion plating and high-temperature evaluation equipment. The company aims to meet complex customer requirements through continuous improvement and advanced manufacturing techniques.

3. Bearings: Composition and Selection: This section details the composition of ceramic and special steel bearings. It includes a comparison of mechanical and physical properties of ceramic materials like silicon nitride, zirconia, and silicon carbide. The document provides insights into the rolling fatigue strength of these materials, with silicon nitride identified as the most suitable for rolling bearings.

4. Lubricants for Bearings: The catalogue discusses the use of grease and solid lubricants for EXSEV bearings, emphasizing their role in maintaining performance in extreme environments.

5. Selection of Bearings: Guidelines are provided for selecting bearings based on specific environmental conditions, such as clean, vacuum, high temperature, and corrosive environments.

6. Bearings with Special Characteristics: The document describes bearings with unique features like non-magnetic, insulating, and high-speed capabilities, catering to specialized applications.

7. Application Examples: Examples of applications in various environments are provided, including clean, vacuum, corrosive, high temperature, magnetic field, electric field, high speed, abrasion resistance, and low torque environments.

8. Supplementary Tables: The catalogue includes tables for shaft tolerances, housing bore tolerances, standard tolerance grades, steel hardness conversion, SI units and conversion factors, inch/millimeter conversion, and cleanliness classes.

Conclusion: JTEKT's EXSEV Bearing Series represents a significant advancement in bearing technology, offering solutions for environments where traditional bearings fail. The document underscores the importance of selecting the right bearing materials and lubricants to ensure optimal performance and longevity in extreme conditions.

Overview of Ceramic Bearings:
Ceramic bearings are evaluated based on dynamic and static load ratings, service life tests, and material properties. The document outlines the performance characteristics of different ceramic materials used in bearings, such as silicon nitride, zirconia, and silicon carbide, highlighting their suitability for high-performance, corrosive, and high-temperature applications.

Load Ratings and Material Characteristics:
Table 1-3 and Table 1-4 provide ratings for ceramic materials and load ratings for full and hybrid ceramic bearings. Silicon nitride is noted for its high load capacity and service life, while zirconia and silicon carbide are suitable for limited load applications in corrosive environments. Full ceramic bearings have comparable dynamic load ratings to steel bearings but higher static load ratings due to their rigidity.

Static Load and Impact Strength:
The static load rating for ceramic bearings differs from steel bearings due to minimal permanent deformation in ceramics. Full ceramic bearings can withstand higher loads before cracking compared to steel bearings. Hybrid ceramic bearings use steel rings, allowing the application of steel bearing static load theories. Impact strength tests show ceramic bearings have sufficient impact resistance.

Fitting and Temperature Considerations:
Fitting ceramic bearings requires attention to stress and temperature differences due to varying coefficients of linear expansion between ceramic and steel materials. Maximum stress from interference should not exceed 150 MPa. Temperature changes during operation affect fitting, necessitating careful assessment of maximum operational temperatures.

Special Applications and Materials:
EXSEV bearings are designed for clean, vacuum, corrosive, and high-temperature environments using materials like martensitic stainless steel and high-speed tool steel. The document provides guidelines for selecting materials based on environmental conditions and performance requirements.

Lubrication and Solid Lubricants:
Lubrication is critical for bearing performance, with grease being preferred for its superior performance. In environments where grease is unsuitable, solid lubricants like soft metals, layer lattice materials, and polymeric materials are used. Fluorinated greases are recommended for high-temperature and vacuum applications due to their low evaporation and particle emissions.

Introduction
This document provides detailed technical information on EXSEV Bearings, focusing on their composition, selection, and application in various environments such as clean, vacuum, high temperature, and corrosive conditions.

Specifications
The document outlines the characteristics of different lubricants and materials used in EXSEV Bearings. It includes tables detailing the molecular structure, viscosity, and vapor pressure of tested PFPEs, as well as the thermal stability, coefficient of friction, and load capacity of major solid lubricants.

Procedures
The document provides equations for estimating the service life of bearings lubricated with solid lubricants and polymeric materials. It emphasizes the importance of operating conditions in determining the service life and provides specific equations for different types of bearings.

Norms and Recommendations
Recommendations are given for selecting bearings based on environmental conditions. For clean environments, low particle emission lubricants are advised. In vacuum environments, the choice of lubricant depends on the pressure and cleanliness requirements. High temperature applications require specific materials and lubricants, with full ceramic bearings recommended for temperatures over 500°C.

Data and Analysis
Tables and figures provide comparative data on particle emissions from various lubricants and the corrosion resistance of materials. The document includes charts for selecting bearings based on cleanliness class and temperature, and it discusses the corrosion resistance of special steels and ceramic materials.

Conclusion
The document concludes with guidance on selecting the appropriate EXSEV Bearings for specific applications, considering factors such as cleanliness, temperature, and corrosion resistance. It highlights the importance of consulting with JTEKT for applications near the specified operating conditions.

Overview: This document provides a comprehensive analysis of EXSEV Bearings, focusing on their performance under water and in various corrosive environments. It covers different types of bearings, including Ceramic Bearings, Hybrid Ceramic Bearings, and Corrosion Resistant Bearings, detailing their specifications, applications, and limitations.

Specifications:

Ceramic Bearings: These bearings terminate their service life due to flaking on the bearing ring or ball surfaces.
Hybrid Ceramic Bearings: These do not develop flaking or wear on ceramic balls but end their service life due to corrosion of stainless steel bearing rings.
Corrosion Resistant Bearings: Made from materials like SUS630 and SUS440C, these bearings are evaluated for their corrosion resistance in various solutions.

Procedures and Test Conditions:

Radial load and rotational speed are specified for different bearing types, with service life comparisons provided.
Test conditions include evaluations of corrosion resistance in various chemical solutions, highlighting the importance of pre-evaluation for corrosion susceptibility.

Norms and Recommendations:

It is recommended to contact JTEKT before using Ceramic Bearings in solutions due to potential early wear.
Non-magnetic bearings are suggested for applications exposed to magnetic fields to prevent disturbances.
Insulating bearings are recommended to prevent electric pitting in motors or generators.

Key Findings from Tables and Figures:

Table 3-2: Details the corrosion resistance of special steels and materials for cages in various solutions.
Table 3-4: Lists typical corrosion-resistant EXSEV Bearings and their applications.
Figures 4-7 and 4-8: Compare power loss and seizure limits between Hybrid Ceramic Bearings and steel bearings, highlighting the superior performance of Hybrid Ceramic Bearings at high speeds.

Applications:

EXSEV Bearings are suitable for high-speed applications like turbochargers and machine tool spindles due to their reduced mass and superior high-speed performance.
They are also used in environments with extreme temperatures and corrosive conditions.

Conclusion: The document emphasizes the importance of selecting the appropriate bearing materials and lubricants for specific conditions to ensure optimal performance and longevity of EXSEV Bearings in challenging environments.

Overview: This document provides detailed specifications and characteristics of various types of bearings and ceramic bearings, focusing on their materials, lubrication, applicable environments, and performance metrics.

Materials: The document lists different materials used for bearing components such as cages, shields, and lubricants. Common materials include austenitic and martensitic stainless steel, fluorocarbon resin, PEEK resin, and reinforced polyamide resin. These materials are selected based on their suitability for specific environments and applications.

Lubrication: Various lubricants are mentioned, including Clean Pro coatings, KDL grease, and fluorocarbon polymers. These lubricants are chosen for their performance in high temperature, vacuum, and clean environments.

Applicable Environments: Bearings are designed for diverse environments such as vacuum, clean, corrosive, high temperature, magnetic, and electric fields. Each type of bearing is optimized for specific conditions to ensure reliability and longevity.

Performance Characteristics: The document includes tables detailing the performance characteristics of different bearings, such as limiting speeds, operating temperatures, and cleanliness classes. The dn value, which is the product of the bearing bore diameter and rotational speed, is a key parameter for assessing bearing performance.

Product Specifications: Detailed specifications for various bearing models are provided, including dimensions, load ratings, and permissible radial loads. The document also outlines the numbering system used for identifying bearings, which includes alphanumeric codes representing different characteristics.

Applications: Bearings are used in a wide range of applications, including semiconductor manufacturing equipment, vacuum motors, and transfer systems. Specific bearings are recommended based on their compatibility with the operational environment and performance requirements.

Key Findings: The document highlights the superior performance of Clean Pro PRZ bearings in terms of low particle emissions and extended service life compared to standard Clean Pro bearings. It also emphasizes the importance of selecting the right bearing type for specific environmental conditions to ensure optimal performance.

Overview: This document provides detailed specifications and performance characteristics of various types of bearings suitable for clean and vacuum environments. It includes information on boundary dimensions, load ratings, permissible radial loads, and limiting speeds for different bearing models.

Specifications: The bearings are designed to operate in high-temperature, vacuum, and clean environments. They are coated with fluoropolymer or packed with fluorinated grease to ensure low particle emissions and stable performance. The document lists various bearing models with their dimensions, load ratings, and speed limits.

Performance: The bearings are suitable for semiconductor and LCD manufacturing equipment, vacuum equipment, and other high-tech applications. They offer stable performance up to 200°C and are resistant to corrosive environments.

Product Features: The bearings are made from materials like martensitic and austenitic stainless steel, and some models use silicon carbide ceramic for high corrosion resistance. They are available with solid lubricants and low-particle-emission cages.

Applications: These bearings are used in semiconductor manufacturing, LCD production, vacuum motors, and other precision equipment requiring clean and stable operation.

Data Summary: The document includes tables listing the dimensions, load ratings, and speed limits for each bearing model. It also provides equations for calculating dynamic and static equivalent loads and lubricant service life expectancy.

Additional Notes: The document mentions that bearings with radial internal clearance of C4 are available, and sizes not listed can be requested from JTEKT. It also highlights the availability of ceramic ball types and the classification of delivery periods for different bearing models.

Overview
This document provides detailed specifications and applications for various types of bearings, including aluminum electrolytic capacitor manufacturing equipment, ceramic bearings, and corrosion-resistant bearings. It includes information on bearing numbering systems, materials used, and performance characteristics.

Specifications
The document outlines the dimensions and specifications for different bearings, including boundary dimensions, permissible radial load, and limiting speed. It provides a comprehensive table listing various bearing numbers, their dimensions, and performance factors.

Materials and Construction
Bearings are constructed using materials such as silicon nitride, fluorocarbon resin, and high-hardness stainless steel. These materials provide high corrosion resistance and are suitable for use in extreme environments, including vacuum and corrosive solutions.

Performance and Applications
The bearings are designed for high-speed, high-temperature, and corrosive environments. They are used in applications such as semiconductor manufacturing, LCD manufacturing, and food container washing machines. The document highlights the extended service life of ceramic bearings in acidic and alkaline solutions compared to standard silicone nitride bearings.

Dynamic and Static Load Calculations
The document provides formulas for calculating dynamic and static equivalent loads, which are essential for determining the bearing's performance under different conditions.

Product Availability
Bearings are available as finished products in stock, as parts to be assembled upon order, or produced upon receipt of an order. The document advises contacting JTEKT for details on delivery periods and availability of sizes not listed.

Key Recommendations
For optimal performance, it is recommended to select bearings based on permissible radial load and limiting speed. In corrosive environments, the use of ceramic bearings with fluoropolymer lubrication is advised to ensure longevity and reliability.

Overview: This document provides detailed technical specifications and applications for various types of bearings, including Corrosion Resistant Hybrid Ceramic Bearings, SK Bearings, Full Complement Ceramic Ball Bearings, and WS Bearings. It includes information on applicable environments, product specifications, performance, and dimensions.

1. Corrosion Resistant Hybrid Ceramic Bearings:

Applicable Environments: Suitable for semiconductor and chemical manufacturing equipment, food machinery, and cleaning equipment.
Product Specifications: Made with precipitation hardening stainless steel and austenitic stainless steel, with ceramic (silicon nitride) balls and a fluorocarbon resin cage.
Performance: Service life is affected by rust and wear when used underwater. Selection should be based on allowable radial load and limiting speed.
Dimensions Table: Provides boundary dimensions, permissible radial load, and limiting speed for various bearing numbers.

2. SK Bearings:

Applicable Environments: Suitable for chemical equipment and transfer systems.
Product Specifications: Components made of martensitic and austenitic stainless steel, lubricated with KHD grease.
Grease Properties: KHD grease has a temperature range of -30 to 120°C and is unsuitable for clean environments.
Dimensions Table: Lists boundary dimensions, basic load ratings, and limiting speeds for various bearing numbers.

3. Full Complement Ceramic Ball Bearings:

Applicable Environments: Used in baking furnace cars and fans in furnaces.
Product Specifications: Made entirely of ceramic for ultrahigh temperature environments, typically used in pairs.
Dimensions Table: Provides permissible radial load and limiting speed for various bearing numbers.

4. WS Bearings:

Applicable Environments: Suitable for semiconductor and LCD manufacturing equipment, vacuum evaporators, and plasma display panel manufacturing equipment.
Product Specifications: Includes tungsten disulfide in the separator material for lubrication.
Performance: Highly heat resistant, superior lubrication life, and free from problematic gas emissions.
Dimensions Table: Lists permissible radial load and limiting speed for various bearing numbers.

Conclusion: The document provides comprehensive technical details for selecting and using different types of bearings in various industrial applications, emphasizing the importance of matching the bearing type to the specific environmental and operational conditions.

Overview: This document provides detailed technical specifications and performance data for various types of bearings, including MG, PN, MO, and non-magnetic hybrid ceramic bearings. It covers their applications, material compositions, and operational environments.

1. MG Bearings:

Applicable Environments: Suitable for ultrahigh vacuum environments with low gas emissions.
Specifications: Made with silver ion-plated balls and stainless steel components.
Performance: Designed for semiconductor and LCD manufacturing equipment, vacuum motors, and medical equipment.
Key Features: Supports ultrahigh temperature vacuums, with a lubricant service life expectancy equation provided for estimating bearing life.

2. PN Bearings:

Applicable Environments: Effective up to 300°C in vacuum conditions.
Specifications: Features a molded PEEK resin cage and stainless steel components.
Performance: Used in carton manufacturing and LCD cleaning equipment.
Key Features: Superior heat resistance and excellent lubricant service life from room temperature to 300°C.

3. MO Bearings:

Applicable Environments: Suitable for high-temperature and vacuum environments.
Specifications: Includes molybdenum disulfide baked stainless steel cage.
Performance: Used in semiconductor manufacturing, vacuum evaporators, and turbo molecular pumps.
Key Features: Molybdenum disulfide offers superior heat resistance compared to PTFE coatings.

4. Non-magnetic Hybrid Ceramic Bearings:

Applicable Environments: Designed for use in magnetic fields and vacuum environments.
Specifications: Composed of non-magnetic stainless steel and silicon nitride ceramic balls.
Performance: Suitable for semiconductor equipment and superconductivity-related applications.
Key Features: Provides stable running torque in magnetic fields, unlike steel bearings.

General Notes:

All bearings are available as finished products or parts in stock, with options for custom orders.
Contact JTEKT for details on sizes not listed in the tables and for delivery period classifications.

Overview: This document provides detailed specifications and performance data for various types of bearings, including hybrid ceramic bearings and linear motion bearings. It includes boundary dimensions, load ratings, and applicable environments for each bearing type.

Specifications: The document lists boundary dimensions for different bearing numbers, including diameter (d), outer diameter (D), width (B), and corner radius (r). It also provides basic load ratings (Cr and C0r) and limiting speeds for grease and oil lubrication.

Performance and Applications: Hybrid ceramic bearings are highlighted for their high-speed capabilities and insulation properties. They are suitable for environments with vacuum, magnetic fields, and high temperatures. Applications include motors, generators, and high-speed machinery.

Product Types: The document describes various bearing types, including deep groove, angular contact, and four-point contact types. It also covers full complement hybrid ceramic ball bearings, which are used in clean or vacuum environments.

Installation and Maintenance: Guidelines for installing linear motion bearings are provided, emphasizing the importance of even load distribution and proper shaft alignment to ensure smooth operation and longevity.

Key Features: Bearings are designed to reduce temperature rise and vibration, with good antiseizure characteristics. They are available in different configurations, including standard, clearance adjustment, and open types.

Additional Notes: The document mentions that sizes not listed are available upon request, and products using oxide ceramics can be ordered. It also provides a bearing numbering system to identify specific product features.

Overview: The document provides detailed technical specifications and procedures for various types of linear motion bearings, specifically focusing on Cross Roller Way Bearing Units and High Ability Angular Contact Ball Bearings. It includes information on dimensions, load ratings, materials, and mounting procedures.

Specifications: The document lists multiple models of linear motion bearings, each with specific dimensions, load ratings, and material compositions. For example, the LWL series includes detailed measurements for slide units and track rails, along with static bending moment ratings. The CRW series provides boundary dimensions and load ratings for cylindrical rollers with retainers.

Procedures: Detailed mounting procedures for Cross Roller Way Bearing Units are provided. This includes steps for cleaning the mounting surfaces, placing and fastening raceway bases, adjusting preload, and ensuring smooth operation. The document emphasizes the importance of correct torque application and preload adjustment to maintain bearing performance.

Standards and Recommendations: The document outlines the importance of maintaining cleanliness and avoiding contamination during assembly. It also provides recommended tightening torques for various screw sizes to ensure proper assembly and function.

Performance and Applications: High Ability Angular Contact Ball Bearings are highlighted for their superior high-speed performance, especially under oil/air lubrication. The document compares the performance of bearings using ceramic balls versus steel balls, noting improvements in high-speed capabilities with ceramic balls.

Key Data and Figures: The document includes tables and figures illustrating dimensions, load ratings, and performance comparisons. For instance, Table 5-1 lists screw tightening torques, and figures demonstrate typical mounting constructions and preload adjustment procedures.

Conclusion: The document serves as a comprehensive guide for selecting, assembling, and maintaining linear motion bearings, with a focus on ensuring high performance and reliability in various applications.

Overview: The document discusses the performance and specifications of High Ability Bearings, particularly focusing on hybrid ceramic bearings compared to conventional steel bearings. It highlights the advantages of using ceramic balls in bearings, including reduced temperature rise, increased speed limits, and improved performance in various environments.

Specifications: The document provides detailed specifications for different types of High Ability Angular Contact Ball Bearings, categorized by type (R, C, D, X), contact angle, and rolling element material (steel or ceramic). It also includes a table of dimensions and masses for ceramic balls and grease-filled bearings for food machinery.

Performance and Advantages: High Ability Bearings offer superior performance with lower temperature rise and higher rotational speed limits compared to conventional bearings. The use of ceramic balls reduces frictional heat and extends speed limits. These bearings are designed for high-speed rotation and heat reduction, making them suitable for high-precision machining.

Applications: The document outlines various applications for ceramic balls and bearings, including use in corrosive environments, ultrahigh vacuums, and high-temperature settings. They are applicable in industries such as food machinery, automotive, and semiconductor manufacturing.

Standards and Compatibility: High Ability Bearings conform to ISO standards, allowing for easy replacement of conventional bearings with minimal changes to existing spindle or housing geometry. The document also mentions NSF certification for lubricants used in food machinery bearings.

Environmental Suitability: The bearings are suitable for clean, vacuum, corrosive, high-temperature, magnetic, and electric field environments. Specific product examples include bearings for transfer robots and chemical vapor deposition equipment, highlighting their adaptability to various conditions.

Overview: This document provides detailed specifications and applications of various types of bearings, focusing on their use in different environments such as vacuum, corrosive, high temperature, magnetic field, electric field, and high-speed applications. The document highlights the unique features and conditions under which each type of bearing operates effectively.

1. Vacuum Environments: Bearings used in vacuum environments must withstand high temperatures and low pressures. Products like the Clean Pro Cross Roller Way Bearing Unit and High Temperature Clean Pro Bearings are designed for such conditions, offering low particle emissions and high durability.

2. Corrosive Environments: Bearings in corrosive environments require resistance to various chemicals. Hybrid Ceramic Bearings with special coatings are used in applications like blood product centrifuges and aluminum electrolytic capacitor manufacturing, providing corrosion resistance to acids, alkaline solutions, and physiological saline.

3. High Temperature Environments: Bearings in high-temperature settings, such as heating furnaces and baking furnaces, need to maintain performance without lubrication. High Temperature Hybrid Ceramic Bearings are used for their heat resistance and ability to reduce particle emissions.

4. Magnetic Field Environments: Bearings in magnetic field environments, such as MRI machines and electron beam lithography, require non-magnetic properties. Hybrid Ceramic Bearings are used for their compatibility with strong magnetic fields and vacuum conditions.

5. Electric Field Environments: Bearings in electric field environments must prevent electrical pitting and provide insulation. Hybrid Ceramic Bearings are used in wind turbine generators and motors to extend service life and prevent electrical damage.

6. High Speed Applications: Bearings in high-speed applications, like turbochargers, require high durability and acceleration response. Hybrid Ceramic Bearings are preferred for their reliability under low viscosity and contaminated oil conditions.

Conclusion: The document emphasizes the importance of selecting the right type of bearing based on the specific environmental conditions and operational requirements to ensure optimal performance and longevity.

Overview
Hybrid Ceramic Bearings are highlighted for their superior performance in high-speed applications across various industries. These bearings offer enhanced service life, reduced lubrication needs, and improved reliability under extreme conditions.

Specifications and Performance

Turbocharger Bearings: Operate at speeds of 180,000 to 210,000 min–1 and temperatures up to 350˚C with oil lubrication. They offer three times the service life of steel bearings, a 20% increase in acceleration response, and an 80% reduction in oil supply.
Polygon Scanner Motors: Use grease lubrication and operate at speeds of 26,000 min–1 or higher, providing excellent reliability in high-speed rotation.
Switched Reluctance Motors: Achieve a 20% to 30% reduction in temperature rise and a rotational speed range 1.2 to 1.5 times higher than steel bearings.
Machine Tool Spindles: Require high rotational performance, quick acceleration/deceleration, and reduced temperature rises. Hybrid Ceramic Bearings meet these needs with a 20% to 30% reduction in temperature rise.
Steel Wire Stranding Machines: Utilize these bearings for improved service life and stability in high-speed operations.
Jet Electrostatic Coating Machines: Use bearings that prevent grease scattering and paint contamination, operating at speeds of 20,000 min–1 with fluorine polymer lubrication.
Micro Gas Turbine Generators: Benefit from low vibration and noise, with excellent high-speed performance at 100,000 min–1 and 200˚C.
Motorcycle Superchargers: Employ lightweight ceramic balls for high-speed performance, heat resistance, and abrasion resistance.
Fuel Injection Systems: Use ceramic balls for improved wear and seizure resistance, compatible with high-pressure fuel injection.
Rally Car Hub Units: Enhance rigidity and reduce unsprung weight, offering excellent abrasion resistance.
Inline Skates: Benefit from low torque and improved durability, widely used in speed skates.
Solar Car Wheel Bearings: Provide stable operation under severe conditions, contributing to power savings.

Supplementary Information

Shaft and Housing Bore Tolerances: Detailed tables provide deviation classes for nominal shaft and housing bore diameters.
Standard Tolerance Grades: Numerical values for standard tolerance grades IT are provided, along with steel hardness conversion tables.

Overview: The document provides detailed technical data and conversion tables related to bearings, ceramic bearings, and various measurement units. It includes hardness scales, conversion factors, and cleanliness classes.

1. Hardness Scales:

Includes Rockwell, Vicker's, and Brinell hardness scales.
Details on standard and tungsten carbide balls for testing.
Specific scales like A-scale, B-scale, and C-scale with corresponding forces (e.g., 588.4 N for A-scale).

2. Conversion Factors:

Comprehensive tables for converting between SI units and other units.
Includes conversions for mass, length, area, volume, force, pressure, and more.
Specific conversions for units like Angstroms, microns, inches, feet, yards, miles, and various pressure units.

3. Cleanliness Classes:

Comparison of JIS B9920/ISO14644-1 cleanliness classes with U.S. federal standards.
Details on particle count limits for different classes (e.g., class 1, class 10, class 100).
Specific particle diameter ranges and corresponding cleanliness class limits.

4. Supplementary Tables:

Inch/millimeter conversion table for precise measurements.
Additional tables for SI units and conversion factors related to various physical properties like work, energy, power, and heat.

Overview: This document is a specification sheet for bearings and ceramic bearings designed for extreme special environments. It includes detailed instructions for selecting the most suitable bearings based on specific operating conditions and requirements.

Specifications: The document outlines the necessary details for bearing selection, including dimensions, application type (new design, repair, or redesign), and required performance characteristics such as cleanliness, vacuum compatibility, corrosion resistance, high temperature, non-magnetism, insulation, and high speed.

Operating Conditions: It specifies the operating conditions such as operation type (dual-directional, continuous, intermittent), running time, rotation speed, load (radial, axial, moment), and environmental factors like temperature, humidity, cleanliness, and pressure.

Performance and Service Life: The document provides options for target service life ranging from less than 1 year to more than 5 years, and includes details on load capacity and fitting requirements.

Environmental Considerations: It addresses the presence of corrosive atmospheres and the usage of grease or oil, specifying whether these are possible or desirable.

Global Network: The document lists contact information for various JTEKT and KOYO offices worldwide, including locations in Singapore, the Philippines, Korea, China, Australia, Europe, North America, Latin America, the Middle East, India, Thailand, and Indonesia.

Conclusion: This specification sheet is essential for selecting the appropriate EXSEV and ceramic bearings for specific applications in extreme environments, ensuring optimal performance and longevity.

Catalog excerpts

BEARINGS AND CERAMIC BEARINGS BEARINGS AND CERAMIC BEARINGS FOR EXTREME SPECIAL ENVIRONMENTS EXSEV BEARINGS AND CERAMIC BEARINGS FOR EXTREME SPECIAL ENVIRONMENTS EXTREME SPECIAL ENVIRONMENTS

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BEARINGS AND CERAMIC BEARINGS FOR EXTREME SPECIAL ENVIRONMENTS ✩ The contents of this catalogue are subject to change without prior notice. We took special care in preparing the contents of this catalogue. JTEKT does not accept liability for errors, omissions, or missing pages, or any loss incurred from the use of this catalogue. Reproduction of this catalogue or any part there of without JTEKT's prior permission is strictly prohibited.

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Products and Applications Development and Manufacturing Facilities 1 BEARINGS AND CERAMIC BEARINGS FOR EXTREME SPECIAL ENVIRONMENTS Bearings: Composition and Selection 1 Ceramic Bearings and Special Steel Bearings ………………………………………… 3 2 Lubricants for EXSEV Bearings …………………………………………………………………… 11 3 How to Select EXSEV Bearings …………………………………………………………………… 14 4 EXSEV Bearings with Special Characteristics ………………………………………… 19 1 EXSEV Bearings and Ceramic Bearings: Table of Specifications …… 25 2 EXSEV Bearings and Ceramic Bearings: Table of Characteristics … 27 3 Radial Ball Bearings ……………………………………………………………………………………………...

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• Clean Pro PRZ Bearings • High Temperature Clean Pro Bearings • Clean Pro Bearings 9 DL Bearings • FA Bearings • High Corrosion Resistant Ceramic Bearings • Corrosion Resistant Ceramic Bearings • Ceramic Bearings 9 Corrosion Resistant Hybrid Ceramic Bearings 9 Non-magnetic Hybrid Ceramic Bearings 9 K series Full Complement Hybrid Ceramic Ball Bearings 9 Clean Pro PRZ Bearings • High Temperature Clean Pro Bearings • Clean Pro Bearings 9 DL Bearings • FA Bearings • High Corrosion Resistant Ceramic Bearings • Corrosion Resistant Ceramic Bearings • Ceramic Bearings 9 Corrosion Guard Pro Bearings...

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Development and Manufacturing Facilities By continuously incorporating new improvements, Koyo Bearings and Ceramic Bearings are applicable in more technologies than ever. Technologies are advancing rapidly and bearings are required to satisfy more complicated and varied requirements under increasingly hostile operating conditions. In response to such needs, JTEKT is committed to the development and manufacture of the EXSEV Bearing Series using the latest research / development and manufacturing facilities. JTEKT intends to supply products that live up to customers' expectations, while contributing...

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Bearings: Composition and Selection 1 Ceramic Bearings and Special Steel Bearings 1 - 1 special environment such as a clean room, vacuum, high temperature application or corrosive environment, or when special ■ Load ratings and service life of ceramic bearings Special Steel Bearings …………………………………………………………………………… 10 characteristics are required, such as being non-magnetic, or insulating, or having superior high speed performance. Please consult JTEKT when using bearings in a new, unprecedented environment, or when bearings with special characteristics Koyo EXSEV Bearings are a special bearing...

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1 Ceramic Bearings and Special Steel Bearings EXSEV Bearings: Composition and Selection The EXSEV Bearing Series has been developed for use in special applications where conventional bearings are not practical. The EXSEV Bearings incorporate components made from special material and use special lubricants, to be applicable in extreme special environments such as a clean room, vacuum, high temperature application, or corrosive condition, and to realize special characteristics, such as being non-magnetic, or insulating, or having superior high speed performance. The EXSEV Bearing series consist...

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EXSEV Bearings: Composition and Selection 3) Ceramic materials suitable for rolling bearings Table 1-3 shows the results of evaluating the ceramic materials in terms of their characteristics and the rolling fatigue strength. Among the ceramic materials tested, silicon nitride is the most suitable as rolling bearing material. JTEKT uses the silicon nitride produced by the hot isostatic pressing (HIP) method as the standard ceramic material for bearings. 4) Composition of ceramic bearings Koyo ceramic bearings are divided into Full Ceramic Bearings (with all components, namely, the outer ring,...

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BEARINGS AND CERAMIC BEARINGS 1 2) Static load rating of ceramic bearings • Static load rating of Hybrid Ceramic Bearings 3) Impact strength of ceramic bearings The basic static load rating of a steel bearing represents a load that produces a localized permanent deformation in the rolling element/raceway contact area, impeding smooth rotation. However, ceramic materials, which are highly rigid, produce little permanent deformation. Therefore, the theory of the basic static load rating for steel bearings is not applicable to ceramic bearings. The theory of the static load rating for steel bearings...

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B2004E Ceramic & EXSEV

B2004E Ceramic & EXSEV

Catalog excerpts

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