BS-EN-4014-2003.pdf

BRITISH STANDARD AEROSPACE SERIES BS EN 4014:2003 Inserts, thickwall, self-locking Design standard The European Standard EN 4014:2003 has the status of a British Standard ICS 49.030.30 ? Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 08:35:58 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 4014:2003 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 10 February 2003 © BSI 10 February 2003 ISBN 0 580 41238 5 National foreword This British Standard is the official English language version of EN 4014:2003. The UK participation in its preparation was entrusted by Technical Committee ACE/12, Aerospace fasteners and fastening systems, to Subcommittee ACE/12/1, Aerospace fasteners and fastening systems (international), 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 or European publications referred to in this document may be 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 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 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 EN title page, pages 2 to 10, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 08:35:58 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN 4014 January 2003 ICS 49.030.30 English version Aerospace series - Inserts, thickwall, self-locking - Design standard This European Standard was approved by CEN on 2 June 2002. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels © 2003 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 4014:2003 E Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 08:35:58 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 4014:2003 (E) 2 Contentspage Foreword3 1Scope 3 2Normative references 3 3Design.3 4Use.5 4.1General5 4.2Performance.6 4.3Installation restrictions .6 5Required characteristics.7 5.1Installation hole7 5.2Serration .8 6Installation8 7Provisions for component salvage9 8Designation.9 9Indication on drawings9 9.1Drawing definition9 9.2Assembly drawing.10 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 08:35:58 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 4014:2003 (E) 3 Foreword This document (EN 4014:2003) has been prepared by the European Association of Aerospace Manufacturers Standardization (AECMA-STAN). After enquiries and votes carried out in accordance with the rules of this Association, this Standard has received the approval of the National Associations and the Official Services of the member countries of AECMA, prior to its presentation to CEN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by July 2003, and conflicting national standards shall be withdrawn at the latest by July 2003. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and the United Kingdom. 1 Scope This standard specifies the use and installation hole dimensions for EN standard, self-locking, thickwall inserts and provisions for component salvage, for aerospace applications. 2 Normative references ISO 5855-1Aerospace - MJ threads - Part 1: General requirements ISO 5855-2Aerospace - MJ threads - Part 2 : Limit dimensions for bolts and nuts EN 3831Aerospace series - Inserts, thickwall, self-locking, in heat resisting steel FE-PM3801 (17-4PH), MoS2 coated 1) EN 4015Aerospace series - Inserts, thickwall, self-locking - Installation and removal procedure 1) 3 Design Typical examples of installed inserts are shown in figures 1 and 2. 1) Published as AECMA Prestandard at the date of publication of this standard Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 08:35:58 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 4014:2003 (E) 4 3.1 The thickwall self-locking screw thread inserts may be used in tapped blind holes and tapped through holes. The minimum flange thickness dimensions K given in tables 3 and 4 are less than the insert lengths. When using these minimum flange thicknesses, protrusion of the inserts will occur (see figure 5, footnote a). Designers must therefore ensure that the inserts do not protrude into an abutment face or foul any other adjacent features. 3.2 The installed insert is consistent with metric size bolt and MJ thread to ISO 5855-2. 3.3 The minimum selected bolt length shall ensure full thread engagement with the insert (see figures 1 and 2). 3.4 These screw thread inserts may be used in aluminium alloys and in harder materials, such as heat resisting steels and titanium alloys. Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 08:35:58 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 4014:2003 (E) 5 Key 11,5 pitches minimum Key 11,5 pitches minimum Figure 1Figure 2 4 Use 4.1 General A self-locking thickwall insert as shown in figure 3 is a sleeve of metal which is threaded both internally and externally, with an externally serrated upper portion. These inserts are screwed into tapped holes which contain counterbores (see 5.1) and are fixed by swaging the serrated portion into the counterbore of the component (see figures 1 and 2) thus preventing the insert moving during the installation or removal of a bolt. The self-locking zone of these inserts is positioned at the opposite side from the counterbored portion. Key 1Knurled end to be swaged into the counterbore of the parent component 2Formed out-of-round to achieve self-locking feature Figure 3 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 08:35:58 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 4014:2003 (E) 6 4.2 Performance The thickwall inserts according to EN 3831 have a minimum performance of 25 re-uses at ambient temperature and 5 re-uses after 350 °C baking at the maximum operating temperature: 350 °C. The self-locking torque values for the inserts are given in table 1. These are the values required to achieve the minimum re-usability performance in accordance with the technical specification of the inserts. Table 1 Self-locking torque Nm Bolt thread diameter min.max. MJ5x0,80,252 MJ6x10,353,2 MJ7x10,54,6 MJ8x10,656 MJ10x1,251,29,5 4.3 Installation restrictions In applications where it is necessary to pass items through the installed insert, care shall be taken to ensure that such items do not foul the locking feature of the insert. The maximum diameter X that can be passed through the insert is illustrated in figure 4 and dimensions are given in table 2. Figure 4 Table 2 Dimensions in millimetres Internal thread size insertDiameter X max. MJ5x0,83,2 MJ6x13,7 MJ7x14,5 MJ8x15,3 MJ10x1,256,7 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 08:35:58 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 4014:2003 (E) 7 5 Required characteristics 5.1 Installation hole See figure 5 and tables 3 and 4. Dimensions in millimetres Key 1Serration, see 5.2. 2Pitch diameter 3Thread 4Normal boss 5Salvage boss a K allows total installation of the threaded part of the insert with 0,5 mm underflush. The not threaded part of the insert may protrude. b L1 min. = K + 5 pitches. Allows machine tapping, housing of the non threaded part and a 1,5 pitches protrusion of the bolt. c L2 min. = Insert length max. + 0,5 (underflush) + 1,5 pitches d Spot facing of M is optional. It avoids swelling of the bearing face when installing in aluminium alloys and also when broaching the serrated counterbores in harder materials. Figure 5 Table 3 Normal size insert Dimensions in millimetres A Diameter code Bolt thread diameter a Installation thread diameter a max.min. E min. G min. G1 b min. H 1 , 0 0 + K min. L1 min. L2 min. M 2,0 0 + N 2, 0 0 + 050-0MJ5x0,8MJ8x1-4H5H8,183,814176,511,510103 060-0MJ6x1MJ9x1-4H5H9,19415197,512,511,5113,1 070-0MJ7x1MJ10x1-4H5H10,1104,4172191413,5123,4 080-0MJ8x1MJ11x1-4H5H11,1114,7192311,516,515,5133,6 100-0MJ10x1,25MJS13x1-4H5H13,1135,32227 0,2 141919154 a According to ISO 5855-1 and ISO 5855-2 b Valid for repair size insert Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 08:35:58 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 4014:2003 (E) 8 Table 4 Repair size insert Dimensions in millimetres A Diameter code Bolt thread diameter a Installation thread diameter a max.min. E min. G min. H 1 , 0 0 + K min. L1 min. L2 min. M 2,0 0 + N 2, 0 0 + 050-1MJ5x0,8MJ9x1-4H5H9,193,8146,511,510113,1 060-1MJ6x1MJ10x1-4H5H10,13104157,512,511,5123,4 070-1MJ7x1MJ11x1-4H5H11,13114,41791413,5133,6 080-1MJ8x1MJ12x1-4H5H12,13124,71911,516,515,5144 100-1MJ10x1,25MJ14x1-4H5H14,13145,322 0,2 141919164,2 a According to ISO 5855-1 and ISO 5855-2 5.2 Serration Serration in counterbores is mandatory when the inserts are installed in hard materials : Rm 620 MPa. It is optional in other materials. For serrated hole a “S“ is added to the designation (see clause 8). 5.2.1 The serration profiles are produced to EN 4015, using a broaching tool installed in hand tool or in machine tool. 5.2.2 Sufficient space shall be provided around each hole to allow access for the broaching tool, see figure 6. Dimensions in millimetres Figure 6 6 Installation EN 4015 Inserts shall be installed between 0,3 mm and 0,5 mm below the surface of the component. Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 08:35:58 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 4014:2003 (E) 9 7 Provisions for component salvage When inserts are selected for a design, consideration shall be given to the feasibility of component salvage where the original hole could be damaged during manufacture, or where the hole is machined out of position. Before provision is made for component salvage, consideration shall be given to component cost/mass requirements, e.g. for an inexpensive component salvage may not be an economic proposition, whereas an expensive component may necessitate salvage. Where provision for salvage is made, the component will be heavier because of the increase in wall thickness around the tapped holes. In the event of component salvage action, hole preparation, salvage insert selection and installation shall be in accordance with EN 4015. 8 Designation EXAMPLE : EN4014-050-0 S Number of this standard Diameter code (see table 3 and 4) Serration (see 5.2) 9 Indication on drawings 9.1 Drawing definition EXAMPLES: see figures 7 and 8. Dimensions in millimetres Key 1 EN4014-070-0 Key 1 EN4014-070-0 Alternatively, the hole may be fully dimensioned on the drawing. Figure 7Figure 8 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 08:35:58 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 4014:2003 (E) 10 9.2 Assembly drawing EXAMPLE: see figure 9. Key 1 Insert EN3831-070-0 installed to EN 4015 Figure 9 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 08:35:58 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 08:35:58 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 4014:2003 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 by Royal Charter. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. 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