BS 3087-7-1996 Pliers and nippers Specification for dimensions of lever assisted side cutting pliers end and diagonal cutting nippers《夹钳和剪断钳 第7部分 杠杆式侧剪钳、中心剪丝钳和斜嘴钳尺寸规范》.pdf

1、BRITISH STANDARD BS3087-7: 1996 ISO5747:1995 Pliers and nippers Part7: Specification for dimensions of lever assisted side cutting pliers, end and diagonal cutting nippers ICS25.140BS3087-7:1996 This British Standard, having been prepared under the directionof the Engineering SectorBoard, was publis

2、hed underthe authority of the Standards Board and comes intoeffect on 15June1996 BSI11-1999 First published December1986 Second edition June1996 The following BSI references relate to the work on this standard: Committee reference MTE/15 Draft for comment93/712532 DC ISBN 0 580 25630 8 Committees re

3、sponsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee MTE/15, Hand tools, upon which the following bodies were represented: British Telecommunications plc Consumer Policy Committee of BSI Federation of British Hand Tool Manufacturers Handle

4、 Manufacturers Association Institute of Carpenters Institute of Trading Standards Administration Co-opted members The following body was also represented in the drafting of the standard, through subcommittees and panels: Ministry of Defence Amendments issued since publication Amd. No. Date CommentsB

5、S3087-7:1996 BSI 11-1999 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 Figure 3 5 Table 1 1 Table 2 2 Table 3 3 Table 4 4 Table 5 5 Table 6 6 List of references Inside back coverB

6、S3087-7:1996 ii BSI 11-1999 National foreword This Part of BS3087 has been prepared by Technical Committee MTE/15. It is identical with ISO5747:1995 Pliers and nippers Lever assisted side cutting pliers, end and diagonal cutting nippers Dimensions and test values, published by the International Orga

7、nization for Standardization (ISO). This British Standard supersedes BS3087:1986 which is withdrawn. The Technical Committee has reviewed the provisions of ISO5744, to which reference is made in the text, and has decided that it is acceptable for use in conjunction with this standard. A related Brit

8、ish Standard to ISO5744:1988 is BS3087-4:1988 Methods of test. It is recommended that pliers, pincers and nippers should be legibly and indelibly marked with a name, trademark or the manufacturing code that will allow traceability. BS3087-7 1)should be marked either on the tool or on its associated

9、packaging. A British Standard does not purport to include all the necessary provisions of 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

10、 comprises a front cover, an inside front cover, pagesi andii, pages1 to6, an inside back 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 Pu

11、blication referred to Corresponding British Standard BS3087 Pliers and nippers ISO5743:1982 Part3:1986 Specification for general requirements (Identical) 1) Marking BS3087-7:1996 on or in relation to a product represents a manufacturers declaration of conformity, i.e.a claim by or on behalf of the m

12、anufacturer that the product meets the requirements of the standard. The accuracy of the claim is therefore solely the responsibility of the person making the claim. Such a declaration is not be confused with third party certification of conformity, which may also be desirable.BS3087-7:1996 BSI 11-1

13、999 1 1 Scope This International Standard specifies the principal dimensions of lever assisted side cutting pliers and end and diagonal cutting nippers, as well as the test values for the pliers and nippers to verify their functioning, according to ISO5744. General technical requirements are given i

14、n ISO5743. The lever assisted pliers in this International Standard are only examples and are not intended to affect the manufacturers design. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard

15、. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC a

16、nd ISO maintain registers of currently valid International Standards. ISO5743:1988, Pliers and nippers General technical requirements. ISO5744:1988, Pliers and nippers Methods of test. 3 Dimensions and test values 3.1 Lever assisted side cutting pliers for hard wire See Figure 1 and Table 1 and Tabl

17、e 2. Table 1 Figure 1 Dimensions in millimetres L L 3 max. w 3 max. w 4 max. G min. G 1 min. T 1 max. 125 6 140 7 160 8 200 10 25 28 32 40 32 36 40 50 4 4,5 5 6 10 11 12 16 3,2 3,5 4,5 7,1 6 8 10 16BS3087-7:1996 2 BSI 11-1999 Cutting pliers shall be tested in accordance with ISO5744. After the load

18、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 maximum cutting force (F 1 ) and diameter (D) of the test wire shall not exceed the values given in Table 2. Table 2 Pliers having a l

19、ever ratio differing from the values given in Table 2 may be checked for compliance by the following formula: where F is the load which is not given in Table 2; F is the load given in Table 2; L 1 is the distance from the centre of the joint rivet to the applied load given in Table 2; L 1 is the mea

20、sured distance from the centre of the joint rivet to the applied load. L L 1 Lever ratio a Cutting test Load test Diameter of hard test wire D b Maximum cutting force F 1,max Load F Maximum permanent set s max c mm mm mm N N mm 125 140 160 200 60 75 90 125 15 15 15 15 1,25 1,4 1,6 2 260 310 370 530

21、360 450 540 750 1 1 2 3 a Lever ratio= b Data for hard test wire are given in ISO5744. c s = w 1 w 2(See ISO5744.) where F 1 is the maximum cutting force which is not given in Table 2; F 2 is the cutting force of hard test wire given in ISO5744; 2 is the correction factor for hard test wire; G is th

22、e measured opening of the jaws; w 1 is the measured width of the handles when closed; w 5 is the measured width of the handles when open. F FL 1 L 1 - = w 5 w 1 G - F 1 F 2 2 G w 5 w 1 - =BS3087-7:1996 BSI 11-1999 3 3.2 Lever assisted end cutting nippers for hard wire See Figure 2 and Table 3 and Ta

23、ble 4. Table 3 Cutting nippers 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 the distance L 1is not suitable for the load test the following formula may be applied: The maximum cutting force (F 1 ) and diameter

24、(D) of the test wire shall not exceed the values given in Table 4. Figure 2 Dimensions in millimetres L L 3 w 3 G T 1 max. max. min. max. 160 8 8 40 3,2 25 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

25、 applied load given in Table 4; L 1 is the measured distance from the centre of the joint rivet to the applied load. F FL 1 L 1 - =BS3087-7:1996 4 BSI 11-1999 Table 4 Nippers having a lever ratio differing from the value given in Table 4 may be checked for compliance by the following formula: L L 1

26、L 2 Lever ratio a Cutting test Load test Diameter of hard test wire D b Maximum cutting force F 1,max Load F Maximum permanent set s max c mm mm mm mm N N mm 160 112 15 14 1,6 400 670 2 a Lever ratio= b Data for hard test wire are given in ISO5744. c s = w 1 w 2(See ISO5744.) where F 1 is the maximu

27、m cutting force which is not given in Table 4; F 2 is the cutting force of hard test wire given in ISO5744; 2 is the correction factor for hard test wire; G is the measured opening of the jaws; w 1 is the measured width of the handles when closed; w 5 is the measured width of the handles when open.

28、w 5 w 1 G - F 1 F 2 2 G w 5 w 1 - =BS3087-7:1996 BSI 11-1999 5 3.3 Lever assisted diagonal cutting nippers for hard wire See Figure 3 and Table 5 and Table 6. Table 5 Cutting nippers shall be tested in accordance with ISO5744. After the load test, the permanent set (s) shall not exceed the value giv

29、en in Table 6. If the distance L 1is not suitable for the load test the following formula may be applied: The maximum cutting force (F 1 ) and diameter (D) of the test wire shall not exceed the values given in Table 6. Figure 3 Dimensions in millimetres L L 3 w 3 G T 1 max. max. min. max. 140 7 20 2

30、5 5 12 160 8 20 25 5 14 where F is the load which is not given in Table 6; F is the load given in Table 6; L 1 is the distance from the centre of the joint rivet to the applied load given in Table 6; L 1 is the measured distance from the centre of the joint rivet to the applied load. F FL 1 L 1 - =B

31、S3087-7:1996 6 BSI 11-1999 Table 6 Nippers having a lever ratio differing from the value given in Table 6 may be checked for compliance by the following formula: L L 1 L 2 Lever ratio a Cutting test Load test Diameter of hard test wire D b Maximum cutting force F 1,max Load F Maximum permanent set s

32、 max c mm mm mm mm N N mm 140 95 12 12 1,4 310 450 2 160 112 15 10 1,6 400 670 2 a Lever ratio= b Data for hard test wire are given in ISO5744. c s = w 1 w 2(See ISO5744.) where F 1 is the maximum cutting force which is not given in Table 6; F 2 is the cutting force of hard test wire given in ISO574

33、4; 2 is the correction factor for hard test wire; G is the measured opening of the jaws; w 1 is the measured width of the handles when closed; w 5 is the measured width of the handles when open. w 5 w 1 G - F 1 F 2 2 G w 5 w 1 - =BS3087-7:1996 BSI 11-1999 List of references See national foreword.BS3

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