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1、 Reference number ISO 3290-2:2008(E) ISO 2008 INTERNATIONAL STANDARD ISO 3290-2 First edition 2008-12-15 Rolling bearings Balls Part 2: Ceramic balls Roulements Billes Partie 2: Billes de roulement en cramique Copyright International Organization for Standardization Provided by IHS under license wit
2、h ISO Licensee=Boeing Co/5910770001 Not for Resale, 01/31/2009 04:43:20 MSTNo reproduction or networking permitted without license from IHS -,-,- ISO 3290-2:2008(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or vi
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5、 for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHT PROTECTED DOCUMENT ISO 2008 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utili
6、zed in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax +
7、 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2008 All rights reserved Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 01/31/2009 04:43:20 MSTNo reproduction or ne
8、tworking permitted without license from IHS -,-,- ISO 3290-2:2008(E) ISO 2008 All rights reserved iii Contents Page Foreword iv 1 Scope . 1 2 Normative references. 1 3 Terms and definitions. 1 4 Symbols. 4 5 Requirements 4 5.1 Ball size 4 5.2 Quality of geometry and surface. 4 5.3 Sorting accuracy a
9、nd ball gauges 5 6 Material 5 7 Dimensions and tolerances. 5 Annex A (normative) Method for assessment of deviation from spherical form 8 Annex B (normative) Illustration of ball gauges and sorting principles 9 Annex C (informative) Examples of defect types and methods of inspection. 11 Bibliography
10、. 12 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 01/31/2009 04:43:20 MSTNo reproduction or networking permitted without license from IHS -,-,- ISO 3290-2:2008(E) iv ISO 2008 All rights reserved Foreword
11、 ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical
12、 committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of elec
13、trotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the
14、 member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for iden
15、tifying any or all such patent rights. ISO 3290-2 was prepared by Technical Committee ISO/TC 4, Rolling bearings. ISO 3290 consists of the following parts, under the general title Rolling bearings Balls: Part 1: Steel balls Part 2: Ceramic balls Copyright International Organization for Standardizati
16、on Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 01/31/2009 04:43:20 MSTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD ISO 3290-2:2008(E) ISO 2008 All rights reserved 1 Rolling bearings Balls Part 2: Ceramic balls
17、1 Scope This part of ISO 3290 specifies requirements for finished silicon nitride balls for rolling bearings. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references
18、, the latest edition of the referenced document (including any amendments) applies. ISO 1132-1, Rolling bearings Tolerances Part 1: Terms and definitions ISO 4288, Geometrical Product Specifications (GPS) Surface texture: Profile method Rules and procedures for the assessment of surface texture ISO
19、5593, Rolling bearings Vocabulary ISO/TS 12181-1, Geometrical Product Specifications (GPS) Roundness Part 1: Vocabulary and parameters of roundness ISO 15241, Rolling bearings Symbols for quantities ISO 26602:1) Fine ceramics (advanced ceramics, advanced technical ceramics) Silicon nitride materials
20、 for rolling bearing balls 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 1132-1, ISO 5593 and the following apply. 3.1 nominal ball diameter diameter value which is used for the general identification of a ball size ISO 5593:1997, 05.04.01 1) To be
21、 published. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 01/31/2009 04:43:20 MSTNo reproduction or networking permitted without license from IHS -,-,- ISO 3290-2:2008(E) 2 ISO 2008 All rights reserved 3.
22、2 single ball diameter distance between two parallel planes tangential to the actual surface of a ball ISO 5593:1997, 05.04.02 3.3 mean ball diameter arithmetical mean of the largest and the smallest of the single diameters of a ball ISO 5593:1997, 05.04.03 3.4 variation of ball diameter difference
23、between the largest and the smallest of the single diameters of a ball ISO 5593:1997, 05.04.04 3.5 deviation from spherical ball surface various types of deviation from the perfect spherical ball surface, uniformly or non-uniformly distributed and repeated around the ball surface NOTE The deviations
24、 to which limits can be attributed are: deviation from spherical form; waviness; surface roughness; surface defect. 3.5.1 deviation from spherical form radial distance between the smallest circumscribed sphere and the greatest inscribed sphere, with their centres common to the least squares sphere c
25、entre NOTE This definition supersedes ISO 5593:1997, 05.06.03. 3.5.2 waviness surface irregularities of random or periodical deviation from the ideal spherical form NOTE 1 Waviness can be evaluated as velocity amplitude by default. NOTE 2 In practice, the waviness components are separated from the r
26、eal surface by a waviness analyser (filters). 3.5.3 surface roughness surface irregularities with relatively small spacings, which usually include irregularities resulting from the method of manufacture being used and/or other influences NOTE These irregularities are considered within the limits tha
27、t are conventionally defined, e.g., within the limits of the sampling length. 3.5.4 surface defect element, irregularity or group of elements and irregularities of the real surface, unintentionally or accidentally caused during manufacture, storage, handling or use of the surface Copyright Internati
28、onal Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 01/31/2009 04:43:20 MSTNo reproduction or networking permitted without license from IHS -,-,- ISO 3290-2:2008(E) ISO 2008 All rights reserved 3 NOTE 1 These types of element or
29、irregularity differ considerably from those constituting the surface roughness and are not considered during the measurement of the surface roughness. NOTE 2 The limits for surface defects are not specified in this part of ISO 3290. 3.6 ball lot definite quantity of balls manufactured under conditio
30、ns presumed uniform and which is considered as an entity ISO 5593:1997, 05.04.05 3.7 mean diameter of ball lot arithmetical mean of the mean diameters of the largest ball and the smallest ball in a ball lot ISO 5593:1997, 05.04.06 3.8 variation of ball lot diameter difference between the mean diamet
31、ers of the largest ball and the smallest ball in a ball lot ISO 5593:1997, 05.04.07 3.9 ball grade specific combination of dimensional, form, surface roughness and sorting tolerances for balls ISO 5593:1997, 05.04.08 NOTE Ball grade is identified by the letter G and a number, e.g. G 20. 3.10 ball ga
32、uge amount by which the mean diameter of ball lot should differ from the nominal ball diameter, this amount being one of an established series ISO 5593:1997, 05.04.09 NOTE 1 Each ball gauge is a whole multiple of the ball gauge interval established for the ball grade in question. NOTE 2 A ball gauge
33、, in combination with the ball grade and nominal diameter, is considered as the most exact ball size specification to be used by a customer for ordering purposes. 3.11 deviation of a ball lot from ball gauge difference between the mean diameter of a ball lot and the sum of the nominal ball diameter
34、and the ball gauge ISO 5593:1997, 05.04.10 3.12 ball subgauge amount, of an established series of amounts, which is the nearest to the actual deviation from the ball gauge of a ball lot ISO 5593:1997, 05.04.11 NOTE 1 Each ball subgauge is a whole multiple of the ball subgauge interval established fo
35、r the ball grade in question. NOTE 2 The ball subgauge, in combination with the nominal ball diameter and the ball gauge, is used by ball manufacturers to denote the mean diameter of a ball lot and is not generally used by customers for ordering purposes. Copyright International Organization for Sta
36、ndardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 01/31/2009 04:43:20 MSTNo reproduction or networking permitted without license from IHS -,-,- ISO 3290-2:2008(E) 4 ISO 2008 All rights reserved 3.13 hardness rolling bearings measure of resistance to pe
37、netration as determined by a specific test method NOTE For ceramics balls, such a test method is the Vickers hardness test. 4 Symbols For the purposes of this document, the symbols given in ISO 15241 and the following apply. The symbols (except those for tolerances) and the values given in Tables 1
38、to 3 denote nominal dimensions unless specified otherwise. Dw nominal ball diameter Dwm mean ball diameter DwmL mean diameter of ball lot Dws single ball diameter G ball grade S ball gauge VDwL variation of ball lot diameter VDws variation of ball diameter RSw deviation from spherical form S deviati
39、on of a ball lot from ball gauge NOTE S = DwmL (Dw + S) 5 Requirements 5.1 Ball size The preferred nominal ball diameters are given in Table 1 and, where applicable, the corresponding inch sizes are given for reference purposes only. 5.2 Quality of geometry and surface Requirements for: variation of
40、 ball diameter, see Table 2; deviation from spherical form, see Table 2; waviness, see Note 1; surface roughness, see Table 2; surface appearance, see Notes 2 and 3. Measurement of surface roughness shall be carried out in accordance with ISO 4288. Copyright International Organization for Standardiz
41、ation Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 01/31/2009 04:43:20 MSTNo reproduction or networking permitted without license from IHS -,-,- ISO 3290-2:2008(E) ISO 2008 All rights reserved 5 NOTE 1 Limits and measuring methods for waviness are subject to a
42、greement between customer and supplier. NOTE 2 Local inhomogeneities in colour, densification, pressing defects, snowflakes, etc. and cracks inherent to the material and its processing are subject to agreement between customer and supplier. NOTE 3 Local defects originating from machining and handlin
43、g are subject to agreement between customer and supplier. 5.3 Sorting accuracy and ball gauges Table 3 comprises the applicable values for: variation of ball lot diameter; gauge interval; preferred gauges; subgauge interval; subgauges. 6 Material The balls shall be manufactured from silicon nitride
44、material in accordance with ISO 26602:. 7 Dimensions and tolerances The preferred nominal ball diameters are given in Table 1. Tolerances for form and surface roughness are given in Table 2. Sorting tolerances and ball gauges are given in Table 3. Copyright International Organization for Standardiza
45、tion Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 01/31/2009 04:43:20 MSTNo reproduction or networking permitted without license from IHS -,-,- ISO 3290-2:2008(E) 6 ISO 2008 All rights reserved Table 1 Preferred nominal ball diameters Nominal ball diameter Dw
46、Corresponding inch size (reference) Nominal ball diameter Dw Corresponding inch size (reference) Nominal ball diameter Dw Corresponding inch size (reference) mm in mm in mm in 0,3 9,525 3/8 30,162 5 1 3/16 0,396 88 1/64 9,921 88 25/64 31,75 1 1/4 0,4 10 32 0,5 10,318 75 13/32 33 0,508 0,02 10,5 33,3
47、37 5 1 5/16 0,6 11 34 0,635 0,025 11,112 5 7/16 34,925 1 3/8 0,68 11,5 35 0,7 11,509 38 29/64 36 0,793 75 1/32 11,906 25 15/32 36,512 5 1 7/16 0,8 12 38 1 12,303 12 31/64 38,1 1 1/2 1,190 62 3/64 12,5 39,687 5 1 9/16 1,2 12,7 1/2 40 1,5 13 41,275 1 5/8 1,587 5 1/16 13,493 75 17/32 42,862 5 1 11/16 1
48、,984 38 5/64 14 44,45 1 3/4 2 14,287 5 9/16 45 2,381 25 3/32 15 46,037 5 1 13/16 2,5 15,081 25 19/32 47,625 1 7/8 2,778 12 7/64 15,875 5/8 49,212 5 1 15/16 3 16 50 3,175 1/8 16,668 75 21/32 50,8 2 3,5 17 53,975 2 1/8 3,571 88 9/64 17,462 5 11/16 55 3,968 75 5/32 18 57,15 2 1/4 4 18,256 25 23/32 4,365 62 11/64 19 4,5 19,05 3/4 4,762 5 3/16 19,8