1、BSI Standards Publication BS ISO 6123-1:2015 Rubber or plastics covered rollers Specifications Part 1: Requirements for hardnessBS ISO 6123-1:2015 BRITISH STANDARD National foreword This British Standard is the UK implementation of ISO 6123-1:2015. It supersedes BS 7442-4.1:1992 which is withdrawn.
2、The UK participation in its preparation was entrusted to Technical Committee PRI/73, Industrial rubber products. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract.
3、 Users are responsible for its correct application. The British Standards Institution 2015. Published by BSI Standards Limited 2015 ISBN 978 0 580 89018 5 ICS 83.140.99 Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the aut
4、hority of the Standards Policy and Strategy Committee on 31 August 2015. Amendments issued since publication Date Text affectedBS ISO 6123-1:2015 ISO 2015 Rubber or plastics covered rollers Specifications Part 1: Requirements for hardness Cylindres revtus de caoutchouc ou de plastique Spcifications
5、Partie 1: Spcifications de duret INTERNATIONAL STANDARD ISO 6123-1 Second edition 2015-08-15 Reference number ISO 6123-1:2015(E)BS ISO 6123-1:2015ISO 6123-1:2015(E)ii ISO 2015 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO 2015, Published in Switzerland All rights reserved. Unless otherwise sp
6、ecified, 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 an intranet, without prior written permission. Permission can be requested from either ISO at the address below or
7、 ISOs member body in the country of the requester. ISO copyright office Ch. de Blandonnet 8 CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 copyrightiso.org www.iso.orgBS ISO 6123-1:2015ISO 6123-1:2015(E)Foreword iv Introduction v 1 Scope . 1 2 Normative refere
8、nces 1 3 Specification of hardness . 1 4 Determination of hardness 2 4.1 Methods . 2 4.1.1 IRHD hardness . 2 4.1.2 Shore hardness 2 4.1.3 Pusey and Jones hardness 2 4.2 Test conditions 2 4.2.1 Test temperature . 2 4.2.2 Cover surface . 2 4.3 Procedure 3 4.4 Expression of results 3 5 Nominal hardness
9、 . 3 6 Tolerances on nominal hardness 3 7 Hardness variation in a single roller . 4 8 Compliance with specifications 5 ISO 2015 All rights reserved iii Contents PageBS ISO 6123-1:2015ISO 6123-1:2015(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of nat
10、ional 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 represented on that committee. Interna
11、tional 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 electrotechnical standardization. The procedures used to develop this document and those inten
12、ded 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 noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.
13、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 or all such patent rights. Details of any patent rights identified during the development of the document w
14、ill be in the Introduction and/or on the ISO list of patent declarations 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 expr
15、essions 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 information The committee responsible for this document is ISO/TC 45, Rubber and rubber products, Subco
16、mmittee SC 4, Products (other than hoses). This second edition cancels 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 r
17、ollers Specifications: Part 1: Requirements for hardness Part 2: Surface characteristics Part 3: Dimensional tolerancesiv ISO 2015 All rights reservedBS ISO 6123-1:2015ISO 6123-1:2015(E) Introduction Covered rollers are cylindrical cores, generally of metal, with a cover of rubber or plastics for a
18、particular use. They are manufactured in a wide variety of sizes and hardness 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 hardness 1 Scope This part of ISO 6123 spec
19、ifies requirements for the measured hardness of rubber or plastics covered rollers. 2 Normative references The 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 un
20、dated references, the latest edition of the referenced document (including any amendments) applies. ISO 7267 (all parts), Rubber-covered rollers Determination of apparent hardness ISO 23529, Rubber General procedures for preparing and conditioning test pieces for physical test methods 3 Specificatio
21、n of hardness The hardness of rubber or plastics covered rollers shall be specified 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 hard
22、ness can be affected by temperature, the application temperature should be specified, 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.
23、 If medium accuracy is required, the use of a Shore A durometer instead of an IRHD hardness 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 v
24、ariations in reading from one operator to another. With meters of the IRHD or the Pusey 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 r
25、eading is additionally dependent on the pressure exerted. NOTE 2 Since hardness is measured 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 sta
26、ndard laboratory conditions are only comparable when the cover thickness is: a) for IRHD hardness: up to 50 IRHD: not less than 9 mm, over 50 IRHD: not less than 6 mm; INTERNATIONAL ST ANDARD ISO 6123-1:2015(E) ISO 2015 All rights reserved 1BS ISO 6123-1:2015ISO 6123-1:2015(E) b) for Shore hardness:
27、 up to 50 Shore A: not less than 9 mm, over 50 Shore A and for Shore D hardness: not less than 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
28、less than 6 mm. 4 Determination of hardness 4.1 Methods 4.1.1 IRHD hardness The determination shall be 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
29、 with curved surfaces and to accommodate a jig for holding small rollers of diameter less than 150 mm. 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 hardness The determination shall be carried out by t
30、he method specified in ISO 7267-2, using a type A Shore durometer for hardnesses up to 90 Shore A degrees, and a type D Shore durometer for higher hardnesses. 4.1.3 Pusey and Jones hardness The determination shall be carried out by the method specified in ISO 7267-3, using a Pusey and Jones indentat
31、ion instrument with a 3,175 mm ball. 4.2 Test conditions 4.2.1 Test temperature The test shall be carried out, 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
32、ensure temperature equilibrium. As hardness can be affected by temperature, the same test temperature shall be 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 u
33、sed compound in order to compare the results correctly. The test temperature shall be recorded. 4.2.2 Cover surface The 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 Proc
34、edure For rollers having up to 2,5 m of cover length, the hardness shall be measured at five points: three points, each 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 cov
35、er length, the hardness shall be measured at nine points: three points, each 120 apart, around the circumference in the 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 results
36、 The hardness of the covered roller shall be reported as the average of all readings taken in accordance with 4.3, rounded to the nearest integer. 5 Nominal hardness Rubber or plastics covered rollers are available in a wide range of hardness values; the particular hardness to be supplied shall be s
37、pecified by agreement between the interested parties in accordance with Clause 3, as an integer as follows: a) for IRHD hardness: 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 hard
38、ness degrees); c) for Pusey and Jones indentation values: 1) multiples of 3 for P and J indentation values from 0 to 15 P and 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 2
39、5 for P and J indentation values over 200 P and J. 6 Tolerances on nominal hardness Unless otherwise agreed (see, however, Clause 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
40、hardness: see Table 1; b) for Shore hardness: 5 Shore A or Shore D hardness degrees; c) for Pusey and Jones indentation values: see Table 2. ISO 2015 All rights reserved 3BS ISO 6123-1:2015ISO 6123-1:2015(E) Table 1 IRHD hardness Nominal IRHD hardness Permitted variation 60 70 80 90 100 150 15 49 60
41、 70 80 90 100 150 250 3 4 5 6 7 8 9 10 25 The permitted deviation for rollers with a nominal P and J indentation number over 250 shall be agreed between the interested parties. 7 Hardness variation in a single roller The variation in hardness in a single roller shall be taken as the difference betwe
42、en the highest and lowest values measured at the points specified in 4.3. Unless otherwise agreed (see, however, Clause 8), the permitted maximum variation 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 degre
43、es; c) for Pusey and Jones indentation values: see Table 4. Table 3 IRHD hardness in a single roller Nominal IRHD hardness Permitted variation 40 90 98 40 90 98 3 2 1 0,54 ISO 2015 All rights reservedBS ISO 6123-1:2015ISO 6123-1:2015(E) Table 4 Pusey and Jones indentation values in a single roller N
44、ominal P and J indentation value Permitted variation 20 60 100 150 200 20 60 100 150 200 3 4 5 7 10 15 8 Compliance with specifications Hardness tolerances (Clause 6) and hardness variation (Clause 7) shall be considered separately. If the purchaser desires closer tolerances than permitted by Clause
45、 6, or smaller variations than permitted by Clause 7, such values cannot 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 6123-1:201
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