1、BRITISH STANDARD AEROSPACE SERIES BS 3SP 168-169:2002 Ferrules and assembly wires for braided rubber cord assemblies for aerospace use ICS 49.035 BS 3SP 168-169:2002 This British Standard, having been prepared under the direction of the Engineering Sector Policy and Strategy Committee, was published
2、 under the authority of the Standards Policy and Strategy Committee on 27 September 2002 BSI 27 September 2002 The following BSI references relate to work on this British Standard: Committee reference ACE/25 Draft for comment 00/706548 DC ISBN 0 580 40305 X Committees responsible for this British St
3、andard The preparation of this British Standard was entrusted to Technical Committee ACE/25, Rubber, elastomeric and sealant materials for aerospace purposes, upon which the following bodies were represented: British Hydromechanics Research Group (BHR) British Narrow Fabrics Association (BNFA) Briti
4、sh Rubber Manufacturers Association Ltd (BRMA) UK Defence Standardization Society of British Aerospace Companies (SBAC) Amendments issued since publication Amd No. Date CommentsBS 3SP 168-169:2002 BSI 27 September 2002 i Contents Page Committees responsible Inside front cover Foreword ii 1S c o p e
5、1 2 Normative references 1 3M a t e r i a l 1 4D i m e n s i o n s 1 5 Finish 1 6 Freedom from defects 1 7 Identification 2 8A s s e m b l y w i r e 2 Figure 1 Ferrules (BS 3SP 168) 3 Figure 2 Assembly wires (BS 3SP 169) 3 Table 1 Dimensions and tolerances for ferrules and assembly wires for braided
6、 rubber cord assemblies 2BS 3SP 168-169:2002 ii BSI 27 September 2002 Foreword This British Standard has been prepared by Technical Committee ACE/25. It supersedes BS 2SP 168-169:1985, which is withdrawn. This new edition reverses the precedence of material and plating requirements. This new edition
7、 of BS SP 168-169 incorporates technical changes only. It does not reflect a full review or revision of the standard, which will be undertaken in due course. This new edition specifies ferrules and assembly wires made from stainless steel, which is the standard material of manufacture. Ferrules made
8、 from high tensile steel and assembly wires made from mild steel are available to the purchaser only if specified in a special order. WARNING. This British Standard calls for the use of substances and/or procedures that may be injurious to health if adequate precautions are not taken. It refers only
9、 to the technical suitability and does not absolve the user from legal obligations relating to health and safety at any stage. This publication does not purport to include all necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard do
10、es not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 3 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued.BS 3SP 168-169:2002 B
11、SI 27 September 2002 1 1 Scope This British Standard specifies the materials, dimensions and finish for steel wire ferrules (BS 3SP 168) and associated assembly wires (BS 3SP 169) for use with braided rubber cords conforming to BS F 70 and BS F 71 and for finished assemblies specified in BS SP 170-1
12、71, for aerospace applications. 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) app
13、lies. BS 1052, Specification for mild steel wire for general engineering purposes. BS F 70, Specification for heavy duty braided rubber cord. BS F 71, Specification for light duty braided rubber cord. BS S 201, Specification for patented cold drawn carbon steel wire and springs (high duty unground w
14、ire). BS S 205, Specification for austenitic chromium-nickel steel wire and springs. BS SP 170-171, Specification for braided rubber cord assemblies for aerospace use. prEN 2573:1986, Steel FE-PA13 Softened and lightly drawn Wire 0,25 D 5 mm. Defence Standard 03-19, Electro-deposition of cadmium. 3
15、Material 3.1 If specified by the purchaser in a special order, ferrules shall be manufactured from high tensile steel wire conforming to BS S 201. Otherwise, ferrules shall be manufactured from stainless steel wire, conforming to BS S 205. 3.2 If specified by the purchaser in a special order, assemb
16、ly wires shall be manufactured from mild steel wire conforming to BS 1052. Otherwise, assembly wires shall be manufactured from annealed stainless steel wire conforming to prEN 2573:1986. 4 Dimensions 4.1 The ferrules and assembly wires shall conform to the dimensions and tolerances given in Table 1
17、 and Figure 1 and Figure 2. 4.2 The coils of the ferrule, after forming, shall be in contact for at least 80 % of the coiled length of the wire. In addition the last two coils at the narrow end shall be in contact. No gap shall be greater than 50 % of the wire diameter. 5 Finish 5.1 Ferrules and ass
18、embly wires manufactured from stainless steel shall not be surface treated. 5.2 After forming, ferrules and assembly wires manufactured from high tensile steel or mild steel shall be cadmium plated in accordance with the requirements of Defence Standard 03-19. 6 Freedom from defects The ferrules and
19、 assembly wires shall be square-cut, and shall be free from burrs and sharp edges.BS 3SP 168-169:2002 2 BSI 27 September 2002 7 Identification Each part shall be identified for ordering purposes by the relevant British Standard number shown below with the appropriate size code letter shown in Table
20、1, together with the suffix letter “S” for stainless steel, or the suffix letter “P” for cadmium plated steel ferrules and assembly wires. Examples BS 3SP 168/B/“S” BS 3SP 168/D/“P” BS 3SP 169/A/“S” BS 3SP 169/C/“P” 8 Assembly wire 8.1 For hand assembly, the shape shall be as shown in Figure 2. 8.2
21、For mass production purposes, the shape shown in Figure 2 shall be varied to suit the method of closure, providing that the assemblies conform to the requirements of BS SP 170-171. Table 1 Dimensions and tolerances for ferrules and assembly wires for braided rubber cord assemblies Size code letter F
22、or cord diameter Ferrule (BS 3SP 168) (see Figure 1) A ss embl y wi r e (BS 3SP 169) (see Figure 2) Wire diameter No. of complete c o i l s ( coil) a b c d Wire diameter e mm mm mm mm mm mm mm mm A 3.0, 4.0, 5.0 or 5.5 1.60 5 5.0 4.0 8.5 2.5 1.40 5.0 B 6.5 2.00 5 6.5 5.2 11.0 3.0 1.60 6.5 C 8.0 2.50
23、 5 8.0 6.4 14.0 4.0 2.00 8.0 D 9.5 or 11.0 2.80 6 9.5 7.6 16.5 5.0 2.00 9.5 F 12.5 3.55 8 12.5 10.0 21.5 6.5 2.50 12.5 G 16.0 4.00 8 16.0 12.8 25.5 7.5 3.15 16.0 H1 9 see note J2 2 K2 6 NOTE These cord sizes, specified in BS F 70, are not fitted with ferrules to the design shown in Figure 1. End fit
24、tings required should be subject to contract and order. 0,5 + 0 0,5 + 0 0,5 + 0 30 + %0 % 10 + % 10 %BS 3SP 168-169:2002 BSI 27 September 2002 3 Figure 1 Ferrules (BS 3SP 168) All dimensions are in millimetres Figure 2 Assembly wires (BS 3SP 169)BS 3SP 168-169:2002 BSI 389 Chiswick High Road London
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