1、BRITISH STANDARD BS ISO 21950:2001 Coated abrasives Plain discs ICS 25.100.70 BS ISO 21950:2001 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 14 October 2004 BSI 14 October 2004 ISBN 0 580 44576 3 National foreword This British Standard rep
2、roduces verbatim ISO 21950:2001 and implements it as the UK national standard. The UK participation in its preparation was entrusted to Technical Committee MTE/13, Grinding wheels, abrasive tools, paper, cloths and powders, which has the responsibility to: A list of organizations represented on this
3、 committee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search”
4、 facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal oblig
5、ations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary o
6、f pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii and iii, a blank page, pages 1 to 4, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publ
7、ication Amd. No. Date CommentsReference number ISO 21950:2001(E) INTERNATIONAL STANDARD ISO 21950 First edition 2001-04-01 Coated abrasives Plain discs Produits abrasifs appliqus Disques simples BSISO21950:2001ISO 05912:(1002)E DPF dlcsiremia ihTs PDF file mya ctnoain emdeddeb tyfepcaes. In acccnadr
8、oe with Aebods licnesign lopic,y this file may be pirntde ro ivwede tub slahl ton eb ideted lnuess teh tyfepacse which aer emdeddeb era licnesed to dna intslaled on teh computre freporming teh idetign. In wodlnidaogn this f,eli trapies accept tniereh teh sersnoptilibiy of ton nifrgnigni Asebod licsn
9、egni ilopcy. ehT ISO tneClar Secteraairt accepts no lilibaity ni this .aera Aebod is a tedarmakr fo Aebod Stsyems Icntaropro.de teDails fo the sfotwera pcudorts sude to crtaee tihs PFD file can be fdnuo in the Glarene Info leratiev to the fil;e the Pc-FDaertion arapmteres were tpoimizde for pirtning
10、. Evyre cera sah neeb taken to enseru taht teh file is suitlbae fro sue by ISO memreb idob.se In teh lnuikley etnev ttah a plborem leratign to it is f,dnuo plsaee ifnrom teh tneClar Sceterairat at the sserdda givne lebwo. ISO 1002 All rhgits rsevre.de elnUss towrehise scepfidei, on trap of tihs cilb
11、uptanoi mya eb cudorperde ro utzilide ni yna form ro yb yna snaem, eelctinorc ro mecinahcal, inclidugn tohpociypong dna micrfoilm, wittuoh repmissino in writing form eitreh ISO at teh erddass lebwo ro ISOs memreb ydob in the ctnuoyr of the rtseuqee.r ISO cirypothg fofice saCe tsopale 65 1121-HC aven
12、eG 20 leT. + 41 22 947 10 11 xaF + 14 22 947 90 74 E-mail cirypothgiso.ch eWb www.iso.ch ii ISO 1002 All irhgts seredevr BSISO21950:2001ISO 05912:(1002)E ISO 1002 All rights rsedevre iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards
13、 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 represented on that committee. International organiza
14、tions, 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 electrotechnical standardization. International Standards are drafted in accordance with the rules given in t
15、he ISO/IEC Directives, Part 3. Draft International Standards adopted by the technical committees are circulated to the 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
16、 some of the elements of this International Standard may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. International Standard ISO 21950 was prepared by Technical Committee ISO/TC 29, Small tools, Subcommittee SC 5, Grinding wheels a
17、nd abrasives. BSISO21950:2001INTENRATIONAL TSANDADR ISO 05912:(1002)E ISO 1002 All rights rsedevre 1 Coated abrasives Plain discs 1 Scope This International Standard specifies the nominal dimensions, tolerances and designations of plain discs. It applies to plain discs intended for use on mobile and
18、 hand held grinding machines. 2 Normative reference The following normative document contains provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not appl
19、y. However, parties to agreements based on this are encouraged to investigate the possibility of applying the most recent edition of the normative document indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain regis
20、ters of currently valid International Standards. ISO 554:1976, Standard atmospheres for conditioning and/or testing Specifications. 3 Requirements 3.1 Types and dimensions See Figures 1 and 2 and Table 1. Figure 1 Type A disc Figure 2 Type B disc BSISO21950:2001ISO 05912:(1002)E 2 ISO 1002 All right
21、s rsedevre Table 1 Dimensions Dimensions in millimeters Type D 1 Limit deviations H Limit deviations 80 100 115 1,5 125 140 150 180 2 200 A 235 3 80 8 8 12 100 22 8 12 115 1,5 22 1 0 8 12 125 22 12 140 22 12 150 22 12 22 180 2 40 1 0 22 200 40 22 B 235 3 40 1 0 BSISO21950:2001ISO 05912:(1002)E ISO 1
22、002 All rights rsedevre 3 3.2 Test conditions The limit deviations given in Table 1 are valid under the following conditions: Temperature: 20 C 2 C Relative humidity: 65 % 5% in accordance with ISO 554 When plain discs are tested they shall be stored for at least 24 h under the above conditions. 4 D
23、esignation A plain disc conforming to this International Standard shall be designated by a) “Plain disc”; b) reference to this International Standard, i.e. ISO 21950; c) type A or B; d) outside diameter, D 1 , in millimetres; e) inside diameter, H, for type B, in millimetres. EXAMPLE A plain disc of
24、 Type B with outside diameter D 1 = 115 mm and H = 22 mm is designated as follows: Plain disc ISO 21950 B 115 22 5 Marking Plain discs shall be marked with a) grain size; b) manufacturer, supplier, importer or their registered trademark. BSISO21950:2001ISO 05912:(1002)E 4 ISO 1002 All rights rsedevr
25、e Bibliography 1 ISO 6344-1:1998, Coated abrasives Grain size analysis Part 1: Grain size distribution test. 2 ISO 6344-2:1998, Coated abrasives Grain size analysis Part 2: Determination of grain size distribution o fm a crog ri tsP1 2toP2 20 . 3 ISO 6344-3:1998, Coated abrasives Grain size analysis
26、 Part 3: Determination of grain size distribution of microgrits P240 to P2500. BSISO21950:2001blankBS ISO 21950:2001 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on
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