1、BRITISH STANDARD BS3087-12: 1991 ISO9242:1988 Pliers and nippers Part 12: Specification for dimensions and test values of construction workers pincersBS3087-12:1991 This British Standard, having been prepared under the directionof the Machine, Engineers and Hand Tools Standards Policy Committee, was
2、published under the authorityof the Standards Boardand comes into effect on 28February1991 BSI10-1999 The following BSI references relate to the work on this standard: Committee reference MTE/15 Draft for comment87/72295 DC ISBN 0 580 19273 3 Committees responsible for this British Standard The prep
3、aration of this British Standard was entrusted by the Machine, Engineers and Hand Tools Standards Policy Committee (MTE/-) to Technical Committee MTE/15, upon which the following bodies were represented: British Coal Corporation British Telecommunications plc Consumer Policy Committee of BSI Electri
4、city Supply Industry in United Kingdom Federation of British Engineers Tool Manufacturers Federation of British Hand Tool Manufacturers Handle Manufacturers Association Institute of Carpenters Institute of Trading Standards Administration Institution of Production Engineers Ministry of Defence Amend
5、ments issued since publication Amd. No. Date CommentsBS3087-12:1991 BSI 10-1999 i Contents Page Committees responsible Inside front cover National foreword ii 1 Scope 1 2 Normative references 1 3 Dimensions and test values 1 Figure 1 1 Figure 2 3 Table 1 1 Table 2 2 Table 3 3 Table 4 4 Publication(s
6、) referred to Inside back coverBS3087-12:1991 ii BSI 10-1999 National foreword This Part of BS3087 has been prepared under the direction of the Machine, Engineers and Hand Tools Standards Policy Committee. It is identical with ISO9242:1988 “Pliers and nippers Construction workers pincers Dimensions
7、and test values”, published by the International Organization for Standardization (ISO). As work continues in ISO the number of tools covered by this standard will increase. BS3087-10 covers those tools in BS3087:1959 (withdrawn) that were not standardized by ISO because their style and application
8、were exclusive to theUK. The Technical Committee has reviewed the provisions of ISO5744, to which reference is made in the text, and has decided that they are acceptable for use in conjunction with this standard. A related British Standard to ISO5744:1988 is BS3087-4:1988. It is recommended that pli
9、ers, pincers and nippers should be legibly and indelibly marked with a name, trademark or the manufacturing code that will allow traceability. BS3087-12 1)should be marked either on the tool or on its associated packaging. A British Standard does not purport to include all the necessary provisions o
10、f a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, pages1 to4, an inside bac
11、k cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Cross-references International Standard Corresponding British Standard BS3087 Pliers and nippers ISO5743:19
12、82 Part3:1986 Specification for general requirements (Identical) 1) Marking BS3087-12:1991 on or in relation to a product represents a manufacturers declaration of conformity, i.e.a claim by or on behalf of the manufacturer that the product meets the requirements of the standard. The accuracy of the
13、 claim is therefore solely the responsibility of the person making the claim. Such a declaration is not to be confused with third party certification of conformity, which may also be desirable.BS3087-12:1991 BSI 10-1999 1 1 Scope This International Standard specifies the principal dimensions of cons
14、truction workers pincers and the test values in order to verify their aptitude to function in conformity with ISO5744. The general technical requirements are given in ISO5743. The construction workers pincers illustrated in this International Standard are only examples and are not intended to affect
15、 the manufacturers design. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties
16、to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards listed below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO5743:1982, Pliers and nippers General technica
17、l requirements. ISO5744:1988, Pliers and nippers Methods of test. 3 Dimensions and test values 3.1 Construction workers pincers Style A Table 1 Figure 1 Dimensions in millimetres L L 3max. T 1min. w 3max. G min. 200 10 224 10 250 10 280 10 18 20 22 25 16 18 20 22 32 36 40 45 14 16 18 20BS3087-12:199
18、1 2 BSI 10-1999 Construction workers pincers, style A, shall be tested in accordance with ISO5744. After the load test, the permanent set s shall not exceed the value given in Table 2. If the distance L 1is not suitable for the load test, the following formula may be applied: The cutting force F 1an
19、d the diameter D of the test wire shall not exceed the values given in Table 2. Table 2 Pincers having a lever ratio differing from the values given in Table 2 may be checked for compliance using the following formula: where F is the load which is not given in Table 2; F is the load given in Table 2
20、; L 1 is the distance from the centre of the joint rivet to the point of application of the load given in Table 2; L 1 is the measured distance from the centre of the joint rivet to the point of application of the load. L L 1 L 2 Cutting test Load test Diameter of medium hard test wire D a Maximum c
21、utting force F 1,max Load F Maximum permanent set s max b mm mm mm mm N N mm 200 224 250 280 140 160 180 200 22 24 26 28 1,6 1,6 1,6 1,6 455 430 415 405 710 800 900 1000 1,4 1,6 1,8 2 a Data for medium hard test wire are given in ISO5744. b s = w 1 w 2(See ISO5744.) where F 1 is the maximum cutting
22、force which is not given in Table 2; F 2 is the cutting force of medium hard test wire (see ISO5744); 1,6 is the correction factor for medium hard test wire; L 1 is the measured distance from the centre of the joint rivet to the point of application of the load; L 2 is the measured distance from the
23、 centre of the joint rivet to the cutting edges.BS3087-12:1991 BSI 10-1999 3 3.2 Construction workers pincers Style B Table 3 Construction workers pincers, style B, shall be tested in accordance with ISO5744. After the load test, the permanent set s shall not exceed the value given in Table 4. If th
24、e distance L 1is not suitable for the load test, the following formula may be applied: The cutting force F 1and the diameter D of the test wire shall not exceed the values given in Table 4. Figure 2 Dimensions in millimetres L L 3max. T 1min. w 3min. G min. 200 13 250 13 315 13 355 13 18 22 28 32 16
25、 20 25 28 36 45 56 63 14 16 18 20 where F is the load which is not given in Table 4; F is the load given in Table 4; L 1 is the distance from the centre of the joint rivet to the point of application of the load given in Table 4; L 1 is the measured distance from the centre of the joint rivet to the
26、 point of application of the load.BS3087-12:1991 4 BSI 10-1999 Table 4 Pincers having a lever ratio differing from the values given in Table 4 may be checked for compliance using the following formula: L L 1 L 2 Cutting test Load test Diameter of medium hard test wire D a Maximum cutting force F 1,m
27、ax Load F Maximum permanent set s max b mm mm mm mm N N mm 200 250 315 355 132 170 212 236 28 36 50 63 1,6 1,6 1,6 1,6 610 610 680 770 755 950 1190 1325 1,4 1,8 2,2 2,5 a Data for medium hard test wire are given in ISO5744. b s = w 1 w 2(See ISO5744.) where F 1 is the maximum cutting force which is
28、not given in Table 4; F 2 is the cutting force of medium hard test wire (see ISO5744); 1,6 is the correction factor for medium hard test wire; L 1 is the measured distance from the centre of the joint rivet to the point of application of the load; L 2 is the measured distance from the centre of the
29、joint rivet to the cutting edges.BS3087-12:1991 BSI 10-1999 Publication(s) referred to See national foreword.BS3087-12: 1991 ISO9242:1988 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presen
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