1、BRITISH STANDARD AEROSPACE SERIES BSEN 2018:1989 Specification for Bearings-airframe rolling single row, self aligning roller bearings in steel diameter series3 and 4 Dimensions and loads This European Standard EN 2018 has the status of a British Standard. UDC 629.7.02:621.822.8.004.1:621.828:669.14
2、BSEN2018:1989 This British Standard, having been prepared under the directionof the Aerospace Standards Policy Committee, waspublished under the authorityof the Board ofBSIandcomes into effect on 29 September 1989 BSI 12-1999 The following BSI references relate to the work on this standard: Committe
3、e reference MCE/7 Draft for comment 76/74662 DC ISBN 0 580 17652 5 Cooperating organizations The European Committee for Standardization, under whose supervision this European Standard was prepared, comprises the national standards organizations of the following Western European countries. Austria Oe
4、sterreichisches Normungsinstitut Belgium Institut belge de normalisation Denmark Dansk Standardiseringsraad Finland Suomen Standardisoimisliito, r.y. France Association franaise de normalisation Germany Deutsches Institut fr Normung e.V. Greece Hellenic Organization for Standardization Ireland Natio
5、nal Standards Authority of Ireland Italy Ente Nazionale Italiano di Unificazione Netherlands Nederlands Normalisatie-instituut Norway Norges Standardiseringsforbund Portugal Instituto Portugus de Qualidade Spain Instituto Espaol de Normalizacin Sweden Standardiseringskommissionen i Sverige Switzerla
6、nd Association suisse de normalisation United Kingdom British Standards Institution Amendments issued since publication Amd. No. Date of issue CommentsBSEN2018:1989 BSI 12-1999 i Contents Page Cooperating organizations Inside front cover National foreword ii Brief history 2 Text of EN 2018 3 Nationa
7、l appendix A Inside back cover National appendix B Inside back coverBSEN2018:1989 ii BSI 12-1999 National foreword This British Standard has been prepared under the direction of the Aerospace Standards Policy Committee and is the English language version ofEN2018 “Bearings-airframe rolling single ro
8、w, self aligning roller bearings in steel diameter series3and4. Dimensions and loads. Aerospace series”, published by the European Committee for Standardization (CEN). EN2018 was produced as a result of international discussion in which the UK took an active part. A British Standard does not purport
9、 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 comprises a front cover, an inside front cove
10、r, pages i and ii, theEN title page, pages 2 to 6, 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.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE
11、 NORM EN 2018 June 1984 UDC 629.7.02:621.822.8.004.1:621.828:669.14 Key words: Aircraft industry, airframe bearings, self aligning bearings, roller bearings, steel, dimensions, static loads English version Bearings-airframe rolling single row, self aligning roller bearings in steel diameter series 3
12、 and 4 Dimensions and loads Aerospace series Roulements pour structures daronefs roulements en acier, rotule sur une range de rouleaux sries de diamtres 3 et 4 Dimensions et charges Srie arospatiale Luft- und Raumfahrt Flugwerklager einreihige Tonnenlager aus Stahl Durchmesserreihen 3 und 4 Masze un
13、d Belastungen This European Standard was accepted by CEN on 1984-06-21. CEN members are bound to comply with the requirements of CEN 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 bi
14、bliographical references concerning such national standards may be obtained on application to the CEN Central Secretariat 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 responsibi
15、lity of a CEN member into its own language and notified to CEN Central Secretariat has the same status as the official versions. CEN members are the national standards organizations of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Ireland, Italy, Netherlands, Norway, Portugal, Spain,
16、Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels CEN 1984 Copyright reserved to all CEN members Ref. No. EN 2018:1984 EEN2018:1984 BSI 12-1999 2 Br
17、ief history This European Standard has been prepared by the European Association of Aerospace Constructors (AECMA). This Standard has been accepted by the European Committee for Standardization (CEN) after inquiries and votes carried out in accordance with the rules of this Committee. Contents Page
18、Brief history 2 1 Scope 3 2 Fields of application 3 3 References 3 4 Definitions 3 5 Symbols 3 6 Materials 3 7 Required characteristics 3 8 Designation 5 9 Marking 5 10 Technical specification 5 Figure 4 Table 4EN2018:1984 BSI 12-1999 3 1 Scope This standard specifies the characteristics, of rigid s
19、ingle row ball bearings of diameter series3and4 1)designed to withstand only slow rotations and oscillations under load. They are intended for use between fixed and moving parts of the aircraft structure and their control mechanisms. 2 Fields of application The airframe roller bearings defined in th
20、e present standard shall be used from 54to +150 C. However, being lubricated with the following greases: very high pressure grease, ester type (code A), operational range 73to +121 C or very high pressure grease, synthetic hydrocarbons, general purpose (code B), operational range 54to+177 C (refer t
21、o EN2063), their field of application when lubricated with code A grease shall be limited to+121 C. 3 References ISO 15:1981, Rolling bearings Radial bearings Boundary dimensions General plan. EN 2031, Steel FE-PL31, Hardened and tempered, Bars. EN 2063, Bearings, airframe rolling Technical Specific
22、ation. 4 Definitions Self aligning roller bearings, full complement (without cage), single row. 5 Symbols 6 Materials Inner ring: Steel EN2031 2) 59to64HRC Outer ring: Steel EN 2031 2) 59to64HRC Rollers: Steel EN2031 2) 59to64HRC Shields: Corrosion resisting material Seals: Polytetrafluoroethylene (
23、PTFE); or polytetrafluoroethylene (PTFE) glass fibre reinforced plastic material. 7 Required characteristics 7.1 Dimensions Tolerances Clearances Loads Mass Configuration shall correspond with the Figure. Dimensions shall correspond with the Table. Bearings can be assembled with either seals or shie
24、lds. 1) See ISO 15. % ds = the deviation of a single bore diameter % Ds = the deviation of a single outside diameter % dmp = single plane mean bore diameter deviation % Dmp = single plane mean outside diameter deviation C s = permissible static radial load F a = bearing axial load = axial component
25、of actual bearing load F a max = permissible static axial load F r = static radial load P or = static equivalent radial load Y s = coefficient of axial load. 2) For new designs, bearings in corrosion resisting steel should be used for preference, seeEN2020.EN2018:1984 4 BSI 12-1999 7.2 Surface rough
26、ness Ra = 0,2 4m for the raceway and rolling elements. Ra = 0,8 4m for the bore side faces and cylindrical outer surface. Table Figure Dimensions in millimetres d D C 0 0,12 B 0 0,12 d 1nom. Tolerances m r Radial internal clearance Permissible static radial load C s Mass kg/1 000 parts Code nominal
27、% dmp % Dmp % ds % Ds m kN . 08 8 30 14 17 14 0 8 0 9 + 2 10 + 2 11 0,3 to 0,8 10 to 20 36,7 58 10 10 35 17 21 15,7 0 11 + 3 14 53,9 91 12 12 37 18 + 3 11 60,2 106 15 15 42 21,8 69,6 132 17 17 47 19 23 25,1 94,5 186 20 20 52 21 26 28 0 10 0 13 + 3 13 +4 17 0,3 to1 15 to 25 113,2 246 25 25 62 24 29 3
28、4,5 161,7 397 30 30 72 27 34 41,3 215,6 610 F a max.=where Y s= 3,3 Equivalent static radial load P or . Load P orresulting from radial and axial loads is calculated according to formula P or= F r+ 3,3 F aand shall be less than or equal to load C sgiven in the Table, see EN 2063. For ultimate static
29、 loads, see EN 2063. C s Y s -EN2018:1984 BSI 12-1999 5 8 Designation Each bearing shall only be designated as in the following example: where the following codes are applied: NOTEIf necessary, the originator code S9005may be introduced between the description block and the identity block. 9 Marking
30、 In addition to the manufacturers own marking, each bearing shall be marked, on one side face only using the identity block as defined in clause8 of this standard. Marking position and method are at the manufacturers option. 10 Technical specification Bearings supplied to this standard shall conform
31、 with the requirements of EN 2063. Greases Types A = ester type grease E = with seals B = synthetic hydrocarbon type grease P = with shields6 blankBSEN2018:1989 BSI 12-1999 National appendix A The United Kingdom participation in the preparation of this European Standard was entrusted by the Aerospac
32、e Standards Policy Committee (ACE/-) to Technical Committee MCE/7 upon which the following bodies were represented: Advanced Manufacturing Technology Research Institute Ball and Roller Bearing Manufacturers Association Engineering Equipment and Materials Users Association Institution of Production E
33、ngineers Ministry of Defence North East Coast Institution of Engineers and Shipbuilders Society of British Aerospace Companies Limited National appendix B The British Standards corresponding to the European and International Standards referred to in the text are identical in number and title with th
34、ose given in clause3 with the exception of ISO15for which the corresponding British Standard is BS6267:1982 (content identical).BSEN 2018:1989 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It p
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