1、BSI Standards PublicationBS ISO 6123-1:2015Rubber or plastics coveredrollers SpecificationsPart 1: Requirements for hardnessBS ISO 6123-1:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 6123-1:2015. Itsupersedes BS 7442-4.1:1992 which is withdrawn.The UK p
2、articipation in its preparation was entrusted to TechnicalCommittee PRI/73, Industrial rubber products.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 re
3、sponsible for its correctapplication. The British Standards Institution 2015. Published by BSI StandardsLimited 2015ISBN 978 0 580 89018 5ICS 83.140.99Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandar
4、ds Policy and Strategy Committee on 31 August 2015.Amendments issued since publicationDate Text affectedBS ISO 6123-1:2015 ISO 2015Rubber or plastics covered rollers Specifications Part 1: Requirements for hardnessCylindres revtus de caoutchouc ou de plastique Spcifications Partie 1: Spcifications d
5、e duretINTERNATIONAL STANDARDISO6123-1Second edition2015-08-15Reference numberISO 6123-1:2015(E)BS ISO 6123-1:2015ISO 6123-1:2015(E)ii ISO 2015 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2015, Published in SwitzerlandAll rights reserved. Unless otherwise specified, no part of this publicati
6、on may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country o
7、f the requester.ISO copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO 6123-1:2015ISO 6123-1:2015(E)Foreword ivIntroduction v1 Scope . 12 Normative references 13 Specification of hardness . 14 Deter
8、mination of hardness 24.1 Methods . 24.1.1 IRHD hardness . 24.1.2 Shore hardness 24.1.3 Pusey and Jones hardness 24.2 Test conditions 24.2.1 Test temperature . 24.2.2 Cover surface . 24.3 Procedure 34.4 Expression of results 35 Nominal hardness . 36 Tolerances on nominal hardness 37 Hardness variati
9、on in a single roller . 48 Compliance with specifications 5 ISO 2015 All rights reserved iiiContents PageBS ISO 6123-1:2015ISO 6123-1:2015(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of prepar
10、ing 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 organizations, governmental and non-governmental, in li
11、aison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) 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 Di
12、rectives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the possibility that
13、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. 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 decl
14、arations received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and 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 a
15、bout ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 45, Rubber and rubber products, Subcommittee SC 4, Products (other than hoses).This second edition cance
16、ls and replaces the first edition (ISO 6123-1:1982), of which it constitutes a minor revision, mainly to update the normative references.ISO 6123 consists of the following parts, under the general title Rubber or plastics covered rollers Specifications: Part 1: Requirements for hardness Part 2: Surf
17、ace characteristics Part 3: Dimensional tolerancesiv ISO 2015 All rights reservedBS ISO 6123-1:2015ISO 6123-1:2015(E)IntroductionCovered rollers are cylindrical cores, generally of metal, with a cover of rubber or plastics for a particular use. They are manufactured in a wide variety of sizes and ha
18、rdness grades depending on the intended use. ISO 2015 All rights reserved vBS ISO 6123-1:2015BS ISO 6123-1:2015Rubber or plastics covered rollers Specifications Part 1: Requirements for hardness1 ScopeThis part of ISO 6123 specifies requirements for the measured hardness of rubber or plastics covere
19、d rollers.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including
20、any amendments) applies.ISO 7267 (all parts), Rubber-covered rollers Determination of apparent hardnessISO 23529, Rubber General procedures for preparing and conditioning test pieces for physical test methods3 Specification of hardnessThe hardness of rubber or plastics covered rollers shall be speci
21、fied in one of the following units, as agreed between the interested parties:a) international rubber hardness degrees (IRHD);b) Shore hardness degrees (Shore A or Shore D);c) Pusey and Jones indentation values.As hardness can be affected by temperature, the application temperature should be specifie
22、d, if necessary.A basic correlation is recognized between IRHD, Shore hardness degrees and Pusey and Jones indentation values for a determined quality. An equivalence exists between IRHD and Shore A hardness degrees. If medium accuracy is required, the use of a Shore A durometer instead of an IRHD h
23、ardness tester is possible, but it should be noted that the values are not in any case identical, due to differences in the intervals between taking readings.NOTE 1 All hand-operated hardness meters are subject to variations in reading from one operator to another. With meters of the IRHD or the Pus
24、ey and Jones type, the reading is influenced by the rate of application of the load and whether or not the force applied has a component other than perpendicular. With spring - loaded meters of the Shore type, the reading is additionally dependent on the pressure exerted.NOTE 2 Since hardness is mea
25、sured by indentation, the thickness of the rubber or plastics material can affect the hardness reading obtained. The hardness reading of a cover compound on a roller and the true hardness of that compound under standard laboratory conditions are only comparable when the cover thickness is:a) for IRH
26、D hardness:up to 50 IRHD: not less than 9 mm,over 50 IRHD: not less than 6 mm;INTERNATIONAL STANDARD ISO 6123-1:2015(E) ISO 2015 All rights reserved 1BS ISO 6123-1:2015ISO 6123-1:2015(E)b) for Shore hardness:up to 50 Shore A: not less than 9 mm,over 50 Shore A and for Shore D hardness: not less than
27、 6mm;c) for Pusey and Jones indentation values:over 200 P and J: not less than 18 mm,over 100 up to 200 P and J: not less than 12 mm,over 40 up to 100 P and J: not less than 9 mm,up to 40 P and J: not less than 6 mm.4 Determination of hardness4.1 Methods4.1.1 IRHD hardnessThe determination shall be
28、carried out, using a hardness meter calibrated in international rubber hardness degrees (IRHD), by the method specified in ISO 7267-1. The meter shall be equipped with a suitable base plate for use with curved surfaces and to accommodate a jig for holding small rollers of diameter less than 150 mm.
29、A Pusey and Jones type support is suitable, as well as any other support permitting the measurement of hardness of a curved surface.4.1.2 Shore hardnessThe determination shall be carried out by the method specified in ISO 7267-2, using a type A Shore durometer for hardnesses up to 90 Shore A degrees
30、, and a type D Shore durometer for higher hardnesses.4.1.3 Pusey and Jones hardnessThe determination shall be carried out by the method specified in ISO 7267-3, using a Pusey and Jones indentation instrument with a 3,175 mm ball.4.2 Test conditions4.2.1 Test temperatureThe test shall be carried out,
31、 whenever possible, at a standard laboratory temperature (23 C 2 C or 27 C 2 C) in accordance with ISO 23529. The covered roller shall be brought to the test temperature prior to testing to ensure temperature equilibrium.As hardness can be affected by temperature, the same test temperature shall be
32、used throughout any one test or series of tests intended to be comparable. If this condition cannot be met, it is necessary to consider the influence of temperature on the hardness of the used compound in order to compare the results correctly.The test temperature shall be recorded.4.2.2 Cover surfa
33、ceThe test shall be made on smooth, ground, clean surfaces, unless otherwise agreed between interested parties.2 ISO 2015 All rights reservedBS ISO 6123-1:2015ISO 6123-1:2015(E)4.3 ProcedureFor rollers having up to 2,5 m of cover length, the hardness shall be measured at five points: three points, e
34、ach 120 apart, around the circumference in the middle of the roller; one-point at each end, at a distance of 10 % of the cover length from the end.For rollers having over 2,5 m of cover length, the hardness shall be measured at nine points: three points, each 120 apart, around the circumference in t
35、he middle of the roller; at each end three points, each 120 apart, around the circumference, and each at a distance of 10 % of the cover length from the end.4.4 Expression of resultsThe hardness of the covered roller shall be reported as the average of all readings taken in accordance with 4.3, roun
36、ded to the nearest integer.5 Nominal hardnessRubber or plastics covered rollers are available in a wide range of hardness values; the particular hardness to be supplied shall be specified by agreement between the interested parties in accordance with Clause 3, as an integer as follows:a) for IRHD ha
37、rdness: 99 98 97- 95 IRHD, and multiples of 5 for values below 95 IRHD (for example 90, 85, 80 IRHD);b) for Shore hardness: multiples of 5 (for example 40, 45, 50, 55 Shore hardness degrees);c) for Pusey and Jones indentation values:1) multiples of 3 for P and J indentation values from 0 to 15 P and
38、 J,2) multiples of 5 for P and J indentation values over 15 up to 100 P and J,3) multiples of 10 for P and J indentation values over 100 up to 200 P and J,4) multiples of 25 for P and J indentation values over 200 P and J.6 Tolerances on nominal hardnessUnless otherwise agreed (see, however, Clause
39、8), the permitted deviation of the measured hardness (i.e. the average value reported in accordance with 4.4) from the nominal hardness shall be as follows:a) for IR HD hardness: see Table 1;b) for Shore hardness: 5 Shore A or Shore D hardness degrees;c) for Pusey and Jones indentation values: see T
40、able 2. ISO 2015 All rights reserved 3BS ISO 6123-1:2015ISO 6123-1:2015(E)Table 1 IRHD hardnessNominal IRHD hardnessPermitted variation 60 70 80 90 100 150 15 49 60 70 80 90 100 150 25034567891025The permitted deviation for rollers with a nominal P and J indentation number over 250 shall be agreed b
41、etween the interested parties.7 Hardness variation in a single rollerThe variation in hardness in a single roller shall be taken as the difference between the highest and lowest values measured at the points specified in 4.3. Unless otherwise agreed (see, however, Clause 8), the permitted maximum va
42、riation of hardness within the roller shall be as follows:a) for IRHD hardness: see Table 3;b) for Shore hardness: 4 Shore A or Shore D hardness degrees;c) for Pusey and Jones indentation values: see Table 4.Table 3 IRHD hardness in a single rollerNominal IRHD hardnessPermitted variation 20 60 100 1
43、50 200 20 60 100 150 200345710158 Compliance with specificationsHardness tolerances (Clause 6) and hardness variation (Clause 7) shall be considered separately.If the purchaser desires closer tolerances than permitted by Clause 6, or smaller variations than permitted by Clause 7, such values cannot
44、be safely guaranteed, since raw materials, processing, core construction and reproducibility of testing apparatus (see Clause 3, NOTE 1) preclude greater precision. ISO 2015 All rights reserved 5BS ISO 6123-1:2015ISO 6123-1:2015(E) ISO 2015 All rights reservedICS 83.140.99Price based on 5 pagesThis
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