1、BRITISH STANDARD BS ISO 5749:2004 Pliers and nippers Diagonal cutting nippers Dimensions and test values ICS 25.140.30 BS ISO 5749:2004 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 10 December 2004 BSI 10 December 2004 ISBN 0 580 45042 2 N
2、ational foreword This British Standard reproduces verbatim ISO 5749:2004 and implements it as the UK national standard. It supersedes BS 3087-9:1986 which is withdrawn. The UK participation in its preparation was entrusted by Technical Committee MTE/15, Hand tools, to Subcommittee MTE/15/13, Assembl
3、y tools for screws and nuts, pliers and nippers, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications referred to in this document may b
4、e found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” 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
5、 responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and
6、keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of 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 7 and a back cover. The BSI copyright n
7、otice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments Reference number ISO 5749:2004(E)INTERNATIONAL STANDARD ISO 5749 Third edition 2004-09-15 Pliers and nippers Diagonal cutting nippers Dimensions and test values Pi
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11、gno it is f,dnuo plsaee ifnrom ttneC ehlar Secterirata ta teh serddaig sleb nevwo. ii BSISO5749:2004 iiiForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is norma
12、lly 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 liaison with ISO, also take part in th
13、e 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 the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare
14、International Standards. 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 some
15、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 5749 was prepared by Technical Committee ISO/TC 29, Small tools, Subcommittee SC 10, Assembly tools for screws and nuts, pliers and nippers. This
16、 third edition cancels and replaces the second edition (ISO 5749:1988) which has been technically revised. BSISO5749:2004blankINTENRATIONAL TSANDADR IS:9475 O4002(E)1Pliers and nippers Diagonal cutting nippers Dimensions and test values 1 Scope This International Standard specifies the principal dim
17、ensions of diagonal cutting nippers and the test values for the nippers in order to verify their aptitude to function in conformity with ISO 5744. General technical requirements are given in ISO 5743. The diagonal cutting nippers illustrated in this International Standard are examples only and are n
18、ot intended to affect the manufacturers design. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any
19、 amendments) applies. ISO 5743, Pliers and nippers General technical requirements ISO 5744:2004, Pliers and nippers Methods of test 3 Dimensions and test values 3.1 Diagonal cutting nippers for hard wire The main dimensions for cutting nippers for hard wire are shown in Figure 1 and given in Table 1
20、. The cutting nippers shall be tested in accordance with ISO 5744. After the load test, the permanent set s shall not exceed the value given in Table 2. If distance l 1is not suitable for the load test, the formula given in ISO 5744:2004, 4.2 shall be used. The cutting force, F 1 , and the diameter,
21、 d, of the test wire shall not exceed the values given in Table 2. Nippers having a lever ratio differing from the values given in Table 2 shall be checked for compliance using the formula given in ISO 5744:2004, 5.3.3. BSISO5749:20042 Dimensions in millimetres aF = Load applied in load test or F 1f
22、orce applied in cutting test. Figure 1 Diagonal cutting nippers for hard wire Table 1 Diagonal cutting nippers for hard wire, main dimensions Dimensions in millimetres l l 3w 3t 1max. max. max. 125 6 18 22 10 140 7 20 25 11 160 8 22 28 12 180 9 25 32 14 200 10 28 36 16 Table 2 Diagonal cutting nippe
23、rs for hard wire, force application and test values Cutting test Load test Nominal length l l 1l 2Diameter of hard test wire daMaximum cutting force F 1 maxLoad F Maximum permanent set s max bmm mm mm mm N N mm 125 80 10 1,25 500 800 0,5 140 90 11 1,4 575 900 1 160 100 12,5 1,6 700 1 000 1 180 112 1
24、4 1,8 850 1 120 1 200 125 16 2 1 020 1 250 1 aData for hard test wire are given in ISO 5744. bs = w 1 w 2(see ISO 5744). BSISO5749:2004 33.2 Diagonal cutting nippers for medium hard wire The main dimensions for cutting nippers for hard wire are shown in Figure 2 and given in Table 3. The cutting nip
25、pers shall be tested in accordance with ISO 5744. After the load test, the permanent set s shall not exceed the value given in Table 4. If distance l 1is not suitable for the load test, the formula given in ISO 5744:2004, 4.2 shall be used. The cutting force, F 1 , and the diameter, d, of the test w
26、ire shall not exceed the values given in Table 4. Nippers having a lever ratio differing from the values given in Table 4 shall be checked for compliance using the formula given in ISO 5744:2004, 5.3.2. Dimensions in millimetres aF = Load applied in load test or F 1force applied in cutting test. Fig
27、ure 2 Diagonal cutting nippers for medium hard wire Table 3 Diagonal cutting nippers for medium hard wire, main dimensions Dimensions in millimetres l l 3w 3t 1max. max. max. 125 6 18 22 10 140 7 20 25 11 160 8 22 28 12 180 9 25 32 14 200 10 28 36 16 BSISO5749:20044 Table 4 Diagonal cutting nippers
28、for medium hard wire, force application and test values Cutting test Load test Nominal length l l 1l 2Diameter of medium hard test wire daMaximum cutting force F 1 maxLoad F Maximum permanent set s max bmm mm mm mm N N mm 125 80 12,5 1,6 450 800 0,5 140 90 14 1,6 450 900 1 160 100 16 1,6 460 1 000 1
29、 180 112 18 1,6 460 1 120 1 200 125 20 1,6 460 1 250 1 aData for medium hard test wire are given in ISO 5744. bs = w 1 w 2(see ISO 5744). 3.3 Toggle lever assisted side cutting nippers for hard wire The main dimensions for cutting nippers for hard wire are shown in Figure 3 and given in Table 5. The
30、 cutting nippers shall be tested in accordance with ISO 5744. After the load test, the permanent set s shall not exceed the value given in Table 6. If distance l 1is not suitable for the load test, the formula given in ISO 5744:2004, 4.2 shall be used. The cutting force, F 1 , and the diameter, d, o
31、f the test wire shall not exceed the values given in Table 6. Nippers having a lever ratio differing from the values given in Table 6 shall be checked for compliance using the formula given in ISO 5744:2004, 5.3.4. BSISO5749:2004 5Dimensions in millimetres aF = Load applied in load test or F 1force
32、applied in cutting test. Figure 3 Toggle lever assisted side cutting nippers for hard wire Table 5 Toggle lever assisted side cutting nippers for hard wire, main dimensions Dimensions in millimetres l l 3w 3g t 1max. max. min. max. 200 10 25 45 5 18 224 11 28 48 6 18 Table 6 Toggle lever assisted si
33、de cutting nippers for hard wire, force application and test values Cutting test Load test Nominal length l l 1l 2Lever ratio aDiameter of hard test wire dbMaximum cutting force F 1 maxLoad F Maximum permanent set s max cmm mm mm mm N N mm 200 140 18 14,5 2,5 690 840 1 224 160 20 16,5 2,5 790 950 1
34、aThe lever ratio is equal to (w 5 w 1 )/g. b Data for hard test wire are given in ISO 5744. c s = w 1 w 2(see ISO 5744). BSISO5749:20046 4 Designation EXAMPLE 1 Diagonal cutting nippers, number 101 in accordance with ISO 5742, with a nominal length of 140 mm and for hard wire (H) are designated as f
35、ollows: Diagonal cutting nippers 101 - ISO 5749 - 140 - H EXAMPLE 2 Diagonal cutting nippers, number 101 in accordance with ISO 5742, with a nominal length of 160 mm and for medium wire (M) are designated as follows: Diagonal cutting nippers 101 - ISO 5749 - 160 - M EXAMPLE 3 Toggle lever assisted s
36、ide cutting nippers, number 105 in accordance with ISO 5742, with a nominal length of 200 mm are designated as follows: Toggle lever assisted side cutting nippers 105 - ISO 5749 - 200 5 Marking Marking shall be in accordance with ISO 5743. BSISO5749:2004 7Bibliography 1 ISO 5742, Pliers and nippers
37、Nomenclature BSISO5749:2004BS ISO 5749:2004 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 standards in Europe and at the international level. It is incorporated b
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