CERAMIC & EXSEV BEARINGS
70Pages

CERAMIC BEARINGS BEARINGS EXTREME SPECIAL ENVIRONMENTS TM This catalog has been printed on paper of recyceled paper pulp using environmentally friendly soy ink. CERAMIC BEARINGS AND EXSEV BEARINGS FOR EXTREME SPECIAL ENVIRONMENTS FOR CERAMIC BEARINGS AND BEARINGS AND CAT. NO. B2004E Printed in Japan '08.12-2CDS ('05.06) FOR EXTREME SPECIAL ENVIRONMENTS CAT. NO. B2004E

û JTEKT CORPORATION does not export its products and engineering know-how unless in compliance with the Foreign Exchange and Foreign Trade Control Act and other applicable trade-related regulations, if they are so covered by such act and regulations. Accordingly, please contact our branch office or sales office if you intend to export any product described in this catalogue. CERAMIC BEARINGS AND EXSEK BEARINGS FOR EXTREME SPECIAL ENVIRONMENTS it The contents of this catalogue are subject to change without prior notice. We took special care in preparing the contents of this catalogue. JTEKT...

Koyo CERAMIC BEARINGS AND EXSEV BEARINGS FOR EXTREME SPECIAL ENVIRONMENTS Development and Manufacturing Facilities EXSEV Bearings: Composition and Selection 2 EXSEV Bearings and Other EXSEV Products 8 Tolerance and Internal Clearance of Ceramic Bearings Specifications Sheet

Products and Applications Corrosive Ceramic Bearings and Full Complement Ceramic Ball Bearings Bearings for Extreme Special Environments SK Bearings are used for a wide range of the state of the art technologies. Corrosion Resistant Hybrid Ceramic Bearings Ceramic Bearings Corrosion Resistant Ceramic Bearings Corrosion Resistant Ceramic Bearing App li c a High Corrosion Resistant Ceramic Bearings ti o nR e High Speed qu ir e m en ts Electric field Full Complement Ceramic Ball Bearings Corrosion Resistant Hybrid Ceramic Bearings Ceramic Bearings Hybrid Ceramic Bearings Ceramic Bearings High...

Manufacturing Facilities improvements, Koyo Ceramic Bearings and EXSEV 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 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 to environmental conservation and energy saving...

CERAMIC BEARINGS AND EXSEV BEARINGS 1 Ceramic Bearings and Special Steel Bearings The EXSEV Bearing Series has been developed for use in special applications where conventional bearings are not 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, Ceramic Bearings Ceramic Bearings, including components made from ceramic, have the special properties that steel bearings do not have, such as being non-magnetic or insulating. They can be used in new applications where...

CERAMIC BEARINGS AND BXSEV BEARINGS 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 4) Composition of ceramic bearings Koyo ceramic bearings are divided into Full Ceramic Bearings (with all components, namely, the outer ring, inner ring...

CERAMIC BEARINGS AND BXSEV BEARINGS 2) Static load rating 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 • Static load rating of Full Ceramic Bearings When exposed to continuous excessive loads, ceramic materials may break down; however, before...

CERAMIC BEARINGS AND EXSEV BEARINGS 4) Fitting of ceramic bearings When using ceramic bearings, it should be noted that ceramic materials are largely different from steel materials in the coefficient of linear expansion. Attention should therefore be paid to fitting stresses and temperature rises. The following are the results of evaluating the fitting of a Ceramic Bearing on a stainless steel shaft. Outer ring Inner ring • Maximum stress produced by fitting Table 1-6 shows the results of a static strength test conducted on a ceramic ring fitted on a stainless steel shaft. Table 1-7 shows...

CERAMIC BEARINGS AND EXSEV BEARINGS 2 Lubricants for EXSEV Bearings Bearing performance depends on lubrication; it is no exaggeration to say that lubrication determines the service life of bearings. Grease or a solid lubricant is properly used to lubricate the EXSEV bearings. Compared with solid lubricants, grease is superior for the high speed performance, load carrying capability, and service life of bearings. Therefore, it is recommended to use grease as much as possible. Grease cannot be used for some application in an ultrahigh vacuum, high temperature, or clean environment. In an...

CERAMIC BEARINGS AND EXSEV BEARINGS 4) Service life of solid lubricants Bearings lubricated with a solid lubricant can provide stable running performance as long as the lubricant is supplied continuously. When the lubricant is used up, the metal components become in contact with each other, rapidly increasing running torque and reducing the service life of the bearing. The service life of bearings is greatly influenced by the operating conditions. As a consequence, it is not always possible to accurately estimate the service life of bearings lubricated with solid lubricant because of the...