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1、a Date: 5 November 2008 Origin: International Latest date for receipt of comments: 28 February 2009 Project no.: 2007/03033 Responsible committee: MCE/12 Plain bearings Interested committees: Title: Draft BS ISO 3548-2 : Plain bearings - Thin walled half bearings with or without flange Part 2: Measu
2、rement of wall-thickness and flange thickness Supersession information: If this document is published as a standard, the UK implementation of it will supersede NONE and partially supersede. NONE If you are aware of a current national standard which may be affected, please notify the secretary (conta
3、ct details below). WARNING: THIS IS A DRAFT AND MUST NOT BE REGARDED OR USED AS A BRITISH STANDARD. THIS DRAFT IS NOT CURRENT BEYOND 28 February 2009. This draft is issued to allow comments from interested parties; all comments will be given consideration prior to publication. No acknowledgement wil
4、l normally be sent. See overleaf for information on commenting. No copying is allowed, in any form, without prior written permission from BSI except as permitted under the Copyright, Designs and Patent Act 1988 or for circulation within a nominating organization for briefing purposes. Electronic cir
5、culation is limited to dissemination by e-mail within such an organization by committee members. Further copies of this draft may be purchased from BSI Customer Services, Tel: +44(0) 20 8996 9001 or email . British, International and foreign standards are also available from BSI Customer Services. I
6、nformation on the co-operating organizations represented on the committees referenced above may be obtained from the responsible committee secretary. Cross-references The British Standards which implement International or European publications referred to in this draft may be found via the British S
7、tandards Online Service on the BSI web site http:/. Direct tel: 020 8996 7009 Responsible Committee Secretary: Committee Service Centre (BSI) E-mail: Draft for Public Comment Head Office 389 Chiswick High Road London W4 4AL Telephone: +44(0)20 8996 9000 Fax: +44(0)20 8996 7001 Form 36 Version 8.0 D
8、PC: 08/30173839 DC Licensed Copy: London South Bank University, South Bank University, 31/01/2009 03:38, Uncontrolled Copy, (c) BSI b Introduction This draft standard is based on international discussions in which the UK has taken an active part. Your comments on this draft are invited and will assi
9、st in the preparation of the consequent standard. Comments submitted will be reviewed by the relevant BSI committee before sending the consensus UK vote and comments to the international secretariat, which will then decide appropriate action on the draft and the comments received. If the internation
10、al standard is approved, it is possible the text will be published as an identical British Standard. UK Vote Please indicate whether you consider the UK should submit a negative (with reasons) or positive vote on this draft. Submission The guidance given below is intended to ensure that all comments
11、 receive efficient and appropriate attention by the responsible BSI committee. Annotated drafts are not acceptable and will be rejected. All comments must be submitted, preferably electronically, to the Responsible Committee Secretary at the address given on the front cover. Comments should be compa
12、tible with Version 6.0 or Version 97 of Microsoft Word for Windows, if possible; otherwise comments in ASCII text format are acceptable. Any comments not submitted electronically should still adhere to these format requirements. All comments submitted should be presented as given in the example belo
13、w. Further information on submitting comments and how to obtain a blank electronic version of a comment form are available from the BSI web site at: http:/ Template for comments and secretariat observations Date: xx/xx/200x Document: ISO/DIS xxxxx 1 2 (3) 4 5 (6) (7) MB Clause No./ Subclause No./ An
14、nex (e.g. 3.1) Paragraph/ Figure/Table/ Note (e.g. Table 1) Type of com- ment Comment (justification for change) by the MB Proposed change by the MB Secretariat observations on each comment submitted 3.1 Definition 1 ed Definition is ambiguous and needs clarifying. Amend to read . so that the mains
15、connector to which no connection . 6.4 Paragraph 2 te The use of the UV photometer as an alternative cannot be supported as serious problems have been encountered in its use in the UK. Delete reference to UV photometer. Microsoft and MS-DOS are registered trademarks, and Windows is a trademark of Mi
16、crosoft Corporation. Licensed Copy: London South Bank University, South Bank University, 31/01/2009 03:38, Uncontrolled Copy, (c) BSI THIS DOCUMENT IS A DRAFT CIRCULATED FOR COMMENT AND APPROVAL. IT IS THEREFORE SUBJECT TO CHANGE AND MAY NOT BE REFERRED TO AS AN INTERNATIONAL STANDARD UNTIL PUBLISHE
17、D AS SUCH. IN ADDITION TO THEIR EVALUATION AS BEING ACCEPTABLE FOR INDUSTRIAL, TECHNOLOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT INTERNATIONAL STANDARDS MAY ON OCCASION HAVE TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL TO BECOME STANDARDS TO WHICH REFERENCE MAY BE MADE IN NATIONAL REGULATIONS.
18、RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT, WITH THEIR COMMENTS, NOTIFICATION OF ANY RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE AND TO PROVIDE SUPPORTING DOCUMENTATION. DRAFT INTERNATIONAL STANDARD ISO/DIS 3548-2 International Organization for Standardization, 2008 INTERNATIONAL ORGANIZATION
19、 FOR STANDARDIZATION ORGANISATION INTERNATIONALE DE NORMALISATION ISO/TC 123/SC 5 Voting begins on: 2008-10-27 Secretariat: DIN Voting terminates on: 2009-03-27 Plain bearings Thin-walled half bearings with or without flange Part 2: Measurement of wall thickness and flange thickness Paliers lisses D
20、emi-coussinets minces ou sans collerette Partie 2: Mesurage de lpaisseur de paroi et de lpaisseur de collerette (Revision of ISO 12306:1994) ICS 21.100.10 In accordance with the provisions of Council Resolution 15/1993 this document is circulated in the English language only. Conformment aux disposi
21、tions de la Rsolution du Conseil 15/1993, ce document est distribu en version anglaise seulement. To expedite distribution, this document is circulated as received from the committee secretariat. ISO Central Secretariat work of editing and text composition will be undertaken at publication stage. Po
22、ur acclrer la distribution, le prsent document est distribu tel quil est parvenu du secrtariat du comit. Le travail de rdaction et de composition de texte sera effectu au Secrtariat central de lISO au stade de publication. Licensed Copy: London South Bank University, South Bank University, 31/01/200
23、9 03:38, Uncontrolled Copy, (c) BSI ISO/DIS 3548-2 ii ISO 2008 All rights reserved PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed
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26、 is found, please inform the Central Secretariat at the address given below. Copyright notice This ISO document is a Draft International Standard and is copyright-protected by ISO. Except as permitted under the applicable laws of the users country, neither this ISO draft nor any extract from it may
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28、 the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Reproduction may be subject to royalty payments or a licensing agreement. Violators may be prosecuted. Licensed Copy: London Sout
29、h Bank University, South Bank University, 31/01/2009 03:38, Uncontrolled Copy, (c) BSI Licensed Copy: London South Bank University, South Bank University, 31/01/2009 03:38, Uncontrolled Copy, (c) BSI 2 ISO 2008 All rights reserved Contents Page Foreword.3 1 Scope4 2 Normative references4 3 Definitio
30、n 5 3.1 Wall thickness, s3.5 3.2 Measuring points lines .5 3.3 Tolerance5 3.4 Uncertainty of measurement5 4 Symbols and units.5 5 Purpose of checking .6 6 Checking methods.6 6.1 Measuring principle.6 6.2 Line measurement around the circumference6 6.3 Line measurement in axial direction7 6.4 Point me
31、asurement .8 6.5 Grading of bearings.9 6.6 Eccentric bore9 7 Requirements for measuring equipment and specimen for the contact method 10 7.1 Radius for measuring the outside surface. 10 7.2 Radius for measuring the inside surface. 10 7.3 Measuring pin load. 10 7.4 Set-up. 10 7.5 Periodically Control
32、 10 7.6 Failures on the outside surface. 10 8 Checking of measuring equipment. 11 ISO/DIS 3548-2 Licensed Copy: London South Bank University, South Bank University, 31/01/2009 03:38, Uncontrolled Copy, (c) BSI ISO 2008 All rights reserved 3 Foreword ISO (the International Organization for Standardiz
33、ation) 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 committee has been established has the right to be
34、 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 Interna- tional Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Stand
35、ards 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 member bodies for voting. Publication as an Inte
36、rna- tional 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 identifying any or all such patent rights. ISO 3548
37、-2 was prepared by Technical Committee ISO/TC 123, Plain Bearings, Subcommittee SC 5, Quality analysis and assurance. This part of ISO 3548 replaces parts of ISO 12306 which has been cancelled. ISO 3548 consists of the following parts, under the general title Plain bearings Thin walled half bearings
38、 with or without flange: Part 1: Tolerances, design and methods of test Part 2: Measurement of wall-thickness and flange thickness Part 3: Measurement of peripheral length ISO/DIS 3548-2 Licensed Copy: London South Bank University, South Bank University, 31/01/2009 03:38, Uncontrolled Copy, (c) BSI
39、4 ISO 2008 All rights reserved 1 Scope This part of ISO 3548 specifies in accordance with ISO 12301 the checking of the wall-thickness of thin-walled half bearings with or without flange and describes the necessary checking methods and measuring equipment. This standard applies to a maximum bearing
40、diameter of 150 mm. If this standard should be applied to bigger diameter, an agreement between supplier and user is necessary. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provi- sions of this part of ISO 3548. For dat
41、ed references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part of ISO 3548 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated r
42、eferences, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 286-1, ISO system of limits and fits Part 1: Bases of tolerances, deviations and fits ISO 286-2, ISO system of limits and fits Part 2
43、: Tables of standard tolerance grades and limit deviations for holes and shafts ISO/R 1938, ISO system of limits and fits Part II: Inspection of plain workpieces ISO 3548-1, Plain bearings Thin-walled half bearings with or without flange Tolerances, design and methods of test ISO 12301, Plain bearin
44、gs Quality control techniques and inspection of geometrical and material quality characteristics DRAFT INTERNATIONAL STANDARD ISO/DIS 3548-2 Plain bearings Thin-walled half bearings with or without flange Part 2: Measurement of wall thickness and flange thickness Licensed Copy: London South Bank Uni
45、versity, South Bank University, 31/01/2009 03:38, Uncontrolled Copy, (c) BSI ISO 2008 All rights reserved 5 3 Definition For the purposes of this International Standard, the following definitions apply: 3.1 Wall thickness, s3 Radial distance between the opposing measuring points at the inside and th
46、e outside surface diameter. (See Figure 1.) half bearing Figure 1 Wall thickness, s3 3.2 Measuring points lines Agreed points lines established to facilitate agreement on checking NOTE 1 The establishment of measuring points lines does not preclude the need to comply with dimensional specifi- cation
47、s in other areas. 3.3 Tolerance Range between the upper specified limit and the lower specified limit. 3.4 Uncertainty of measurement Deviation of the measured value from the real value caused by statistical or systemic reasons. 4 Symbols and units For the purposes of this International Standard, th
48、e symbols and units are as given in Table 1. Table 1 Symbols and units Symbol Parameter unit ach Distance to measuring position mm a1 Distance to measuring position rectangular from parting line mm 2 Angle to measuring position from parting line grad H Distance to measuring position from bearing par
49、ting line mm Ci Inner chamfer width mm B Width mm D0 Nominal outside diameter mm Fpin Measuring Pin load N s3 Wall thickness mm x1 Center point of nominal outside diameter mm x2 Center point of eccentric bore mm ISO/DIS 3548-2 Licensed Copy: London South Bank University, South Bank University, 31/01/2009 03:38, Uncontrolled Co