1、BRITISH STANDARD BS ISO 5748:2004 Pliers and nippers End cutting nippers Dimensions and test values ICS 25.140.30 BS ISO 5748:2004 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 45043 0 Nation
2、al foreword This British Standard reproduces verbatim ISO 5748:2004 and implements it as the UK national standard. It supersedes BS 3087-5:1986 which is withdrawn. The UK participation in its preparation was entrusted by Technical Committee MTE/15, Hand tools, to Subcommittee MTE/15/13, Assembly too
3、ls 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 be fou
4、nd 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 resp
5、onsible 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 keep
6、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 6, an inside back cover and a back cover. Th
7、e BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments Reference number ISO 5748:2004(E)INTERNATIONAL STANDARD ISO 5748 Third edition 2004-09-15 Pliers and nippers End cutting nippers Dimensions and te
8、st values Pinces et tenailles Pinces coupantes en bout Dimensions et valeurs dessai BSISO5748:2004DPlcsid Fremia ihTs PDF file mya ctnoian emdebt dedyfepcaes. In ccacnadrow eitA hebods licnesilop gnic,y tihs file mirp eb yatnde iv roweb detu slahl ton ide ebtlnu deess teh typfecaes wihce era hml era
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11、 lertait gno it is f,dnuo plsaee ifnrom ttneC ehlar Secterirata ta teh serddaig sleb nevwo. ii BSISO5748:2004 iiiForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards
12、 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 liaison with ISO, also take p
13、art 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 the ISO/IEC Directives, Part 2. The main task of technical committees is to
14、 prepare 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 t
15、hat 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 5748 was prepared by Technical Committee ISO/TC 29, Small tools, Subcommittee SC 10, Assembly tools for screws and nuts, pliers and nipp
16、ers. This third edition cancels and replaces the second edition (ISO 5748:1988) which has been technically revised. BSISO5748:2004blankINTENRATIONAL TSANDADR IS:8475 O4002(E)1Pliers and nippers End cutting nippers Dimensions and test values 1 Scope This International Standard specifies the principal
17、 dimensions of end 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 end nippers illustrated in this International Standard are examples only and are not intended to
18、 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 amendments) a
19、pplies. ISO 5743, Pliers and nippers General technical requirements ISO 5744:2004, Pliers and nippers Methods of test 3 Dimensions and test values 3.1 End cutting nippers for hard wire The main dimensions for cutting nippers for hard wire are shown in Figure 1 and given in Table 1. Cutting nippers s
20、hall 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, d, of the test wire sh
21、all 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. BSISO5748:20042 Dimensions in millimetres aF = Load applied in load test or F 1force applied in cutting
22、 test. Figure 1 End cutting nippers for hard wire Table 1 End cutting nippers for hard wire, main dimensions Dimensions in millimetres l 3W 3t 1l max. max. max. 140 8 8 25 22 160 9 9 28 25 180 10 10 32 28 200 11 11 36 32 Table 2 End cutting nippers for hard wire, force application and test values Cu
23、tting 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 140 100 16 1,4 750 1 000 1 160 112 18 1,6 900 1 120 1 180 125 20 1,8 1 060 1 250 1 200 140 22 2 1 260 1 400 1 aData for hard test wire are give
24、n in ISO 5744. bs = w 1 w 2(see ISO 5744). BSISO5748:2004 33.2 End 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. Cutting nippers shall be tested in accordance with ISO 5744. After the load test, the permanent se
25、t 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 wire shall not exceed the values given in Table 4. Nippers having a lever ratio differin
26、g 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. Figure 2 End cutting nippers for medium hard wire Table 3 End cutting nippers for medium h
27、ard wire, main dimensions Dimensions in millimetres l 3w 3t 1l max. max. max. 125 7 8 25 20 140 8 9 28 22 160 9 10 32 25 180 10 11 36 28 200 11 12 40 32 BSISO5748:20044 Table 4 End cutting nippers for medium hard wire, force application and test values Cutting test Load test Nominal length l l 1l 2D
28、iameter 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 90 18 1,6 570 900 0,7 140 100 20 1,6 570 1 000 1 160 112 22 1,6 570 1 120 1 180 125 25 1,6 570 1 250 1 200 140 28 1,6 570 1 400 1 aData for medium hard test wire are given in IS
29、O 5744. bs = w 1 w 2(see ISO 5744). 3.3 Toggle lever assisted end cutting nippers for hard wire The main dimensions for cutting nippers for hard wire are shown in Figure 3 and given in Table 5. Cutting nippers shall be tested in accordance with ISO 5744. After the load test, the permanent set s shal
30、l 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, of the test wire shall not exceed the values given in Table 6. Nippers having a lever ratio differing from t
31、he values given in Table 6 shall be checked for compliance using the formula given in ISO 5744:2004, 5.3.4. Dimensions in millimetres aF = Load applied in load test or F 1force applied in cutting test. Figure 3 Toggle lever assisted end cutting nippers for hard wire BSISO5748:2004 5Table 5 Toggle le
32、ver assisted end cutting nippers for hard wire, main dimensions Dimensions in millimetres l 3w 3g t 1l max. max. min. max. 180 10 9 45 4 33,5 200 11 10 50 4 35,5 Table 6 Toggle lever assisted end cutting nippers for hard wire, force application and test values Cutting test Load test Nominal length l
33、 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 180 125 16 12,5 2 640 750 1 200 140 18 14,5 2,5 790 840 1 aThe lever ratio is equal to (w 5 w 1 )/g. bData for hard test wire are given in ISO 5744. cs = w 1 w 2(see I
34、SO 5744). 4 Designation EXAMPLE 1 End cutting nippers, number 102 in accordance with ISO 5742, with a nominal length of 140 mm and for hard wire (H) are designated as follows: End cutting nippers 102 - ISO 5748 - 140 - H EXAMPLE 2 End cutting nippers, number 102 in accordance with ISO 5742, with a n
35、ominal length of 160 mm and for medium hard wire (M) are designated as follows: End cutting nippers 102 - ISO 5748 - 160 - M EXAMPLE 3 Toggle lever assisted end cutting nippers, number 103 in accordance with ISO 5742, with a nominal length of 200 mm are designated as follows: Toggle lever assisted e
36、nd cutting nippers 103 - ISO 5748 - 200 5 Marking Marking shall be in accordance with ISO 5743. BSISO5748:20046 Bibliography 1 ISO 5742, Pliers and nippers Nomenclature BSISO5748:2004blankBS ISO 5748:2004 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independe
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