1、BRITISH STANDARD AEROSPACE SERIES BS EN 4014:2004 Inserts, thickwall, self-locking Design standard The European Standard EN 4014:2004 has the status of a British Standard ICS 49.030.30 BS EN 4014:2004 This British Standard was published under the authority of the Standards Policy and Strategy Commit
2、tee on 16 December 2004 BSI 16 December 2004 ISBN 0 580 45090 2 National foreword This British Standard is the official English language version of EN 4014:2004. It supersedes BS EN 4014:2003 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee ACE/12, Aer
3、ospace fasteners and fastening systems, which has the responsibility to: A list of organizations represented on this committee 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 b
4、e 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
5、 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
6、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 notice disp
7、layed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN4014 November2004 ICS49.030.30 SupersedesEN4014:2003 Englishversion AerospaceseriesInserts,thickwall,selflockingDesign standa
8、rd SriearospatialeDouillesfiletes,paroirenforce, freinageinterneNormedeconception LuftundRaumfahrtGewindeeinstze,dickwandig, SelbstsicherndKonstruktionsnorm ThisEuropeanStandardwasapprovedbyCENon11September2003. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditio
9、nsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aver
10、sioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCentralSecretariathasthesamestatusast heofficial versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France, Germany,Greece,Hungary
11、,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal, Slovakia, Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2004CEN
12、 Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN4014:2004:EEN 4014:2004 (E) 2 Contents Page Foreword3 1 Scope4 2 Normative references4 3 Design.4 4 Use5 4.1 General5 4.2 Performance.6 4.3 Installation restrictions.6 5 Required characteristics.7 5.1 Ins
13、tallation hole.7 5.2 Serration.8 6 Installation9 7 Provisions for component salvage9 8 Designation9 9 Indication on drawings9 9.1 Drawing definition.9 9.2 Assembly drawing.10 EN 4014:2004 (E) 3 Foreword This document (EN 4014:2004) has been prepared by the European Association of Aerospace Manufactu
14、rers - 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 Europea
15、n Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by May 2005, and conflicting national standards shall be withdrawn at the latest by May 2005. This document supersedes EN 4014:2003. According to the CEN/CENELEC I
16、nternal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Ne
17、therlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 4014:2004 (E) 4 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 app
18、lications. 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) applies. ISO 5855-1, Aer
19、ospace MJ threads Part 1: General requirements ISO 5855-2, Aerospace MJ threads Part 2: Limit dimensions for bolts and nuts EN 3831, Aerospace series Inserts, thickwall, self-locking, MJ threads, in heat resisting steel FE-PM3801 (17-4PH), MoS 2coated EN 4015, Aerospace series Inserts, thickwall, se
20、lf-locking Installation and removal procedure3 Design Typical examples of installed inserts are shown in Figures 1 and 2. 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
21、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 con
22、sistent 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 titaniu
23、m alloys. EN 4014:2004 (E) 5 Key 1 1,5 pitches minimum Key 1 1,5 pitches minimum Figure 1 Figure 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 ar
24、e 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 positio
25、ned at the opposite side from the counterbored portion. Key 1 knurled end to be swaged into the counterbore of the parent component 2 formed out-of-round to achieve self-locking feature Figure 3 EN 4014:2004 (E) 6 4.2 Performance The thickwall inserts according to EN 3831 have a minimum performance
26、of 25 re-uses at ambient temperature and five 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 sp
27、ecification of the inserts. Table 1 Self-locking torque Nm Bolt thread diameter min. max. MJ50,8 0,25 2 MJ61 0,35 3,2 MJ71 0,5 4,6 MJ81 0,65 6 MJ101,25 1,2 9,5 4.3 Installation restrictions In applications where it is necessary to pass items through the installed insert, care shall be taken to ensur
28、e 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 insert Diameter X max. MJ50,8 3,2 MJ61 3,7 MJ7
29、1 4,5 MJ81 5,3 MJ101,25 6,7 EN 4014:2004 (E) 7 5 Required characteristics 5.1 Installation hole See Figure 5 and Tables 3 and 4. Dimensions in millimetres Key 1 serration, see 5.2. 2 pitch diameter 3 thread 4 normal boss 5 salvage boss aK allows total installation of the threaded part of the insert
30、with 0,5 underflush. The not threaded part of the insert may protrude. b L 1 min. = K + 5 pitches. Allows machine tapping, housing of the non threaded part and a 1,5 pitches protrusion of the bolt. cL 2 min. = Insert length max. + 0,5 (underflush) + 1,5 pitches dSpot facing of M is optional. It avoi
31、ds 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 E G G 1 cH K L 1 L 2 M N Diameter code Bolt thread diameter aInstallation thread diameter bmax. m
32、in. min. min. min. + 0,1 0 min. min. min. + 0,2 0 + 0,2 0 050-0 MJ50,8 MJ81-4H5H 8,1 8 3,8 14 17 6,5 11,5 10 10 3 060-0 MJ61 MJ91-4H5H 9,1 9 4 15 19 7,5 12,5 11,5 11 3,1 070-0 MJ71 MJ101-4H5H 10,1 10 4,4 17 21 9 14 13,5 12 3,4 080-0 MJ81 MJ111-4H5H 11,1 11 4,7 19 23 11,5 16,5 15,5 13 3,6 100-0 MJ101
33、,25 MJS131-4H5H 13,1 13 5,3 22 27 0,2 14 19 19 15 4 a According to ISO 5855-2 b According to ISO 5855-1 c Valid for repair size insert EN 4014:2004 (E) 8 Table 4 Repair size insert Dimensions in millimetres A E G H K L 1 L 2 M N Diameter code Bolt thread diameter aInstallation thread diameterbmax. m
34、in. min. min. + 0,1 0 min. min. min. + 0,2 0 + 0,2 0 050-1 MJ50,8 MJ91-4H5H 9,1 9 3,8 17 6,5 11,5 10 11 3,1 060-1 MJ61 MJ101-4H5H 10,13 10 4 19 7,5 12,5 11,5 12 3,4 070-1 MJ71 MJ111-4H5H 11,13 11 4,4 21 9 14 13,5 13 3,6 080-1 MJ81 MJ121-4H5H 12,13 12 4,7 23 11,5 16,5 15,5 14 4 100-1 MJ101,25 MJ141-4
35、H5H 14,13 14 5,3 27 0,2 14 19 19 16 4,2 a According to ISO 5855-2 b According to ISO 5855-1 5.2 Serration 5.2.1 Serration in counterbores is mandatory when the inserts are installed in hard materials: R m 620 MPa. It is optional in other materials. For serrated hole a “S“ is added to the designation
36、 (see clause 8). 5.2.2 The serration profiles are produced to EN 4015, using a broaching tool installed in hand tool or in machine tool. 5.2.3 Sufficient space shall be provided around each hole to allow access for the broaching tool, see Figure 6. Dimensions in millimetres Figure 6 EN 4014:2004 (E)
37、 9 6 Installation EN 4015 Inserts shall be installed between 0,3 mm and 0,5 mm below the surface of the component. 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
38、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 necess
39、itate 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 Designatio
40、n EXAMPLE EN4014-050-0S 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 Figure 7: hole without serration See Figure 8: hole with serration (see 5.2) Key 1 EN4014-070-0 Key 1 EN4014-070-0S NOTE Alternatively,
41、the hole may be fully dimensioned on the drawing. Figure 7 Figure 8 EN 4014:2004 (E) 10 9.2 Assembly drawing EXAMPLE: see Figure 9. Key 1 insert EN3831-070-0 installed to EN 4015 Figure 9 blankBS EN 4014:2004 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the indep
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