1、BSI Standards PublicationBS ISO 3290-1:2014Rolling bearings BallsPart 1: Steel ballsBS ISO 3290-1:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 3290-1:2014. Itsupersedes BS ISO 3290-1:2008 which is withdrawn.The UK participation in its preparation was en
2、trusted to TechnicalCommittee MCE/7, Rolling bearings.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British
3、 Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 77272 6ICS 21.100.20Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 August 201
4、4.Amendments issued since publicationDate Text affectedBS ISO 3290-1:2014 ISO 2014Rolling bearings Balls Part 1: Steel ballsRoulements Billes Partie 1: Billes de roulement en acierINTERNATIONAL STANDARDISO3290-1Second edition2014-09-01Reference numberISO 3290-1:2014(E)BS ISO 3290-1:2014ISO 3290-1:20
5、14(E)ii ISO 2014 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2014All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or a
6、n intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPub
7、lished in SwitzerlandBS ISO 3290-1:2014ISO 3290-1:2014(E) ISO 2014 All rights reserved iiiContents PageForeword iv1 Scope . 12 Normative references 13 Terms and definitions . 14 Symbols 45 Requirements 45.1 Ball size 45.2 Quality of geometry and surface 45.3 Sorting accuracy and ball gauges 55.4 Har
8、dness . 56 Dimensions and tolerances . 56.1 General . 56.2 Shortened formats for nominal diameter identification . 5Annex A (normative) Method for assessment of deviation from spherical form 11Annex B (normative) Illustration of ball gauges and sorting principles12Bibliography .14BS ISO 3290-1:2014I
9、SO 3290-1:2014(E)ForewordISO (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 subje
10、ct for which a technical 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
11、) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be no
12、ted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (www.iso.org/directives).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 identifying any
13、 or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (www.iso.org/patents).Any trade name used in this document is information given for the convenience of users a
14、nd does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword Supplementary inf
15、ormation.The committee responsible for this document is ISO/TC 4, Rolling bearings, Subcommittee SC 12, Ball bearings.This second edition cancels and replaces the first edition (ISO 3290-1:2008), which has been technically revised. It also incorporates Technical Corrigendum ISO 3290-1:2008/Cor.1:200
16、9. In particular, “material”, specified in Clause 6 of the first edition, has been deleted.ISO 3290 consists of the following parts, under the general title Rolling bearings Balls: Part 1: Steel balls Part 2: Ceramic ballsiv ISO 2014 All rights reservedBS ISO 3290-1:2014INTERNATIONAL STANDARD ISO 32
17、90-1:2014(E)Rolling bearings Balls Part 1: Steel balls1 ScopeThis part of ISO 3290 specifies requirements for finished steel balls for rolling bearings.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its applic
18、ation. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 1132-1, Rolling bearings Tolerances Part 1: Terms and definitionsISO 4288, Geometrical Product Specifications (GPS) Surface textur
19、e: Profile method Rules and procedures for the assessment of surface textureISO 5593, Rolling bearings VocabularyISO 12181-1, Geometrical product specifications (GPS) Roundness Part 1: Vocabulary and parameters of roundnessISO 15241, Rolling bearings Symbols for physical quantities3 Terms and defini
20、tionsFor the purposes of this document, the terms and definitions given in ISO 1132-1, ISO 5593, and the following apply.3.1ball gaugeamount by which the mean diameter of ball lot should differ from the nominal ball diameter, this amount being one of an established seriesNote 1 to entry: Each ball g
21、auge is a whole multiple of the ball gauge interval established for the ball grade in question.Note 2 to entry: A ball gauge, 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.SOURCE: ISO 55
22、93:1997, 05.04.09, modified Notes 1 and 2 to entry have been added.3.2ball gauge intervalabsolute difference of two consecutive ball gauges3.3ball gradespecific combination of dimensional, form, surface roughness and sorting tolerances for ballsNote 1 to entry: Ball grade is identified by the letter
23、 G and a number, e.g. G 20. ISO 2014 All rights reserved 1BS ISO 3290-1:2014ISO 3290-1:2014(E)SOURCE: ISO 5593:1997, 05.04.08, modified Note 1 to entry has been added.3.4ball lotdefinite quantity of balls manufactured under conditions presumed uniform and which is considered as an entitySOURCE: ISO
24、5593:1997, 05.04.053.5ball subgaugeamount, of an established series of amounts, which is the nearest to the actual deviation from the ball gauge of a ball lotNote 1 to entry: Each ball subgauge is a whole multiple of the ball subgauge interval established for the ball grade in question.Note 2 to ent
25、ry: 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.SOURCE: ISO 5593:1997, 05.04.11, modified Notes 1 and 2 to entry have been add
26、ed.3.6ball subgauge intervalabsolute difference of two consecutive ball subgauges3.7deviation from spherical ball surfacevarious types of deviation from the perfect spherical ball surface, uniformly or non-uniformly distributed and repeated around the ball surfaceNote 1 to entry: The deviations to w
27、hich limits can be attributed are deviation from spherical form, surface defect, surface roughness, and waviness.3.7.1deviation from spherical formradial distance between the smallest circumscribed sphere and the greatest inscribed sphere, with their centres common to the least squares sphere centre
28、Note 1 to entry: This definition supersedes ISO 5593:1997, 05.06.03.3.7.2surface defectelement, irregularity, or group of elements and irregularities of the real surface, unintentionally or accidentally caused during manufacture, storage, handling or use of the surfaceNote 1 to entry: These types of
29、 element or irregularity differ considerably from those constituting the surface roughness and are not considered during the measurement of the surface roughness.Note 2 to entry: The limits for surface defects are not specified in this part of ISO 3290.2 ISO 2014 All rights reservedBS ISO 3290-1:201
30、4ISO 3290-1:2014(E)3.7.3surface roughnesssurface irregularities with relatively small spacings, which usually include irregularities resulting from the method of manufacture being used and/or other influencesNote 1 to entry: These irregularities are considered within the limits that are conventional
31、ly defined, e.g. within the limits of the sampling length.3.7.4wavinesssurface irregularities of random or periodical deviation from the ideal spherical formNote 1 to entry: Waviness shall be evaluated by default as velocity amplitude.Note 2 to entry: In practice, the waviness components are separat
32、ed from the real surface by a waviness analyser (filters).3.8deviation of a ball lot from ball gaugedifference between the mean diameter of a ball lot and the sum of the nominal ball diameter and the ball gaugeSOURCE: ISO 5593:1997, 05.04.103.9hardnessmeasure of resistance to penetration as determin
33、ed by a specific test methodNote 1 to entry: For steel balls, such a test method is generally the Rockwell hardness test.3.10mean ball diameterarithmetical mean of the largest and the smallest of the single diameters of a ballSOURCE: ISO 5593:1997, 05.04.033.11mean diameter of ball lotarithmetical m
34、ean of the mean diameters of the largest ball and the smallest ball in a ball lotSOURCE: ISO 5593:1997, 05.04.063.12nominal ball diameterdiameter value which is used for the general identification of a ball sizeSOURCE: ISO 5593:1997, 05.04.013.13single ball diameterdistance between two parallel plan
35、es tangential to the actual surface of a ballSOURCE: ISO 5593:1997, 05.04.023.14variation of ball diameterdifference between the largest and the smallest of the single diameters of a ballSOURCE: ISO 5593:1997, 05.04.04 ISO 2014 All rights reserved 3BS ISO 3290-1:2014ISO 3290-1:2014(E)3.15variation o
36、f ball lot diameterdifference between the mean diameters of the largest ball and the smallest ball in a ball lotSOURCE: ISO 5593:1997, 05.04.074 SymbolsFor the purposes of this document, the symbols given in ISO 15241 and the following apply.The symbols (except those for tolerances) and the values g
37、iven in Tables 1 to 3 denote nominal dimensions unless specified otherwise.Dwnominal ball diameterDwmmean ball diameterDwmLmean diameter of ball lotDwssingle ball diameterG ball gradeRa arithmetical mean deviation of surface texture (see ISO 42871)S ball gaugeVDwLvariation of ball lot diameterVDwsva
38、riation of ball diameterRSwdeviation from spherical formSdeviation of a ball lot from the ball gaugeNOTE S= DwmL (Dw+ S)5 Requirements5.1 Ball sizeThe preferred nominal ball diameters are given in Table 1 and, where applicable, the corresponding inch sizes are given for reference purposes only.5.2 Q
39、uality of geometry and surfaceRequirements for: variation of ball diameter (see Table 2); deviation from spherical form (see Table 2); waviness (see Note 1); surface roughness see (Table 2); surface appearance and defects (see Note 2).4 ISO 2014 All rights reservedBS ISO 3290-1:2014ISO 3290-1:2014(E
40、)Measurement of surface roughness shall be carried out in accordance with ISO 4288.NOTE 1 Limits and measuring methods for waviness are subject to agreement between the customer and supplier.NOTE 2 Local defects originating from machining and handling are subject to agreement between the customer an
41、d supplier.5.3 Sorting accuracy and ball gaugesTable 3 comprises the applicable values for variation of ball lot diameter, gauge interval, preferred gauges, subgauge interval, and subgauges.5.4 HardnessHardness values and the measuring method shall be agreed upon between the customer and supplier.6
42、Dimensions and tolerances6.1 GeneralThe 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 3.6.2 Shortened formats for nominal diameter identification6.2.1 Metric optionFor purch
43、asing and other general administrative purposes, some users optionally identify nominal metric ball diameters with only three digits following the decimal comma.This option does not identify the diameter with adequate precision for manufacturing purposes and the full long diameter values given in Ta
44、ble 1 with four or five digits following the decimal comma to precisely identify the size shall always be used for gauge and subgauge sorting purposes to avoid any possibility of ambiguity.6.2.2 Imperial optionFor purchasing and other general administrative purposes, some users optionally continue t
45、o identify nominal ball diameters with imperial exact fraction or decimal sizes which carry no risk of ambiguity. Metric equivalents are sometimes also shown but not used as the primary administrative identifier.If this option is applied, gauge and subgauge diameter tolerances in micrometres shall b
46、e added to the imperial nominal reference size or its exact metric equivalent with four or five digits following the decimal comma according to Table 1 of this International Standard for sorting purposes during manufacturing procedures. ISO 2014 All rights reserved 5BS ISO 3290-1:2014ISO 3290-1:2014
47、(E)Table 1 Preferred nominal ball diametersNominal ball diameter DwmmCorresponding inch size (reference) in0,3 0,396 88 1/640,4 0,5 0,508 1/500,6 0,635 1/400,68 0,7 0,793 75 1/320,8 1 1,190 62 3/641,2 1,5 1,587 5 1/161,984 38 5/642 2,381 25 3/322,5 2,778 12 7/6 43 3,175 1/83,5 3,571 88 9/643,968 75
48、5/324 4,365 62 11/644,5 4,762 5 3/165 5,159 38 13/645,5 5,556 25 7/ 325,953 12 15/646 6,35 1/46,5 6,746 88 17/6 46 ISO 2014 All rights reservedBS ISO 3290-1:2014ISO 3290-1:2014(E)Nominal ball diameter DwmmCorresponding inch size (reference) in7 7,143 75 9/327,5 7,540 62 19/647,937 5 5/168 8,334 38 2
49、1/648,5 8,731 25 11/329 9,128 12 23/649,5 9,525 3/89,921 88 25/6410 10,318 75 13/3210,5 11 11,112 5 7/1611,5 11,509 38 29/6411,906 25 15/3212 12,303 12 31/6412,5 12,7 1/213 13,493 75 17/ 3214 14,287 5 9/1615 15,081 25 19/3215,875 5/816 16,668 75 21/3217 17,462 5 11/1618 18,256 25 23/32Table 1 (continued) ISO 2014 All rights reserved 7BS ISO 3290-1:2014ISO 3290-1:2014(E)Nominal ball diameter DwmmCorresponding inch size (reference) in
