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1、BRITISH STANDARD AEROSPACE SERIES BS EN 2012:1989 Specification for Bearings-airframe rolling rigid, single row ball bearings in steel diameter series 0 and 2 Dimensions and loads This European Standard EN 2012 has the status of a British Standard. UDC 629.7.02:621.822.74.004.1:669.14 BS EN 2012:198
2、9 This British Standard, having been prepared under the direction of the Aerospace Standards Policy Committee, was published under the authority of the Board of BSI and comes into effect on 29 September 1989 BSI 12-1999 The following BSI references relate to the work on this standard: Committee refe
3、rence MCE/7 Draft for comment 76/74662 DC ISBN 0 580 17649 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. AustriaOesterrei
4、chisches Normungsinstitut BelgiumInstitut belge de normalisation DenmarkDansk Standardiseringsraad FinlandSuomen Standardisoimisliito, r.y. FranceAssociation franaise de normalisation GermanyDeutsches Institut fr Normung e.V. GreeceHellenic Organization for Standardization IrelandNational Standards
5、Authority of Ireland ItalyEnte Nazionale Italiano di Unificazione NetherlandsNederlands Normalisatie-instituut NorwayNorges Standardiseringsforbund PortugalInstituto Portugus de Qualidade SpainInstituto Espaol de Normalizacin SwedenStandardiseringskommissionen i Sverige SwitzerlandAssociation suisse
6、 de normalisation United KingdomBritish Standards Institution Amendments issued since publication Amd. No.Date of issueComments BS EN 2012:1989 BSI 12-1999i Contents Page Cooperating organizationsInside front cover National forewordii Brief history2 Text of EN 20123 National appendix AInside back co
7、ver National appendix BInside back cover BS EN 2012:1989 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 of EN 2012 “Bearings-airframe rolling rigid, single row ball bearings
8、in steel diameter series 0 and 2. Dimensions and loads. Aerospace series”, published by the European Committee for Standardization (CEN). EN 2012 was produced as a result of international discussion in which the UK took an active part. A British Standard does not purport to include all the necessary
9、 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 cover, pages i and ii, the EN tit
10、le 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 NORM EN 2012 June 1984 UDC
11、 629.7.02:621.822.74.004.1:669.14 Key words: Aircraft industry, airframe bearings, ball bearings, steel, dimensions, static loads English version Bearings-airframe rolling rigid, single row ball bearings in steel diameter series 0 and 2 Dimensions and loads Aerospace series Roulements pour structure
12、s daronefs roulements en acier, rigides une range de billes sries de diamtres 0 et 2 Dimensions et charges Srie arospatiale Luff- und Raumfahrt Flugwerklager einreihige Rillenkugellager aus Stahl Durchmesserreihen 0 und 2 Masze und Belastungen This European Standard was accepted by CEN on 1984-06-21
13、. 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 bibliographical references concerning such national standards may be obt
14、ained 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 responsibility of a CEN member into its own language and notified to CEN Central
15、 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, Sweden, Switzerland and United Kingdom. CEN European Committee for Sta
16、ndardization 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 2012:1984 E EN 2012:1984 BSI 12-1999 2 Brief history This European Standard has been prepared by the European
17、 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 Brief history2 1Scope3 2Fields of application3 3References3 4Definit
18、ions3 5Symbols3 6Materials3 7Required characteristics3 8Designation5 9Marking5 10Technical specification5 Figure4 Table4 EN 2012:1984 BSI 12-19993 1 Scope This standard specifies the characteristics, of rigid single row ball bearings of diameter series 0 and 21) designed to withstand only slow rotat
19、ions 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 the present standard shall be used from 54 to + 150 C. However, being lubricated with the
20、 following greases: very high pressure grease, ester type (code A), operational range 73 to + 121 C or very high pressure grease, synthetic hydrocarbons, general purpose (code B), operational range 54 to + 177 C (refer to EN 2063), their field of application when lubricated with code A grease shall
21、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 Specification. 4 Definitions Rigid bearings, full complement (without cage), single r
22、ow, with filling slot. 5 Symbols 6 Materials 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 shields. 1) See ISO 15. % ds= the deviati
23、on 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 Cs= permissible static radial load Fa max.= permissible static axial load Ys= coefficient of axial load. Inner ring: Steel
24、EN 2031, 59a to 64 HRC. Outer ring: Steel EN 2031, 59a to 64 HRC. Balls: Steel EN 2031, 59a to 64 HRC. Shields : Corrosion resisting material Seals :Polytetrafluoroethylene (PTFE): or polytetrafluoroethylene (PTFE) glass fibre reinforced plastic material. a For new design, bearings in corrosion resi
25、sting steel should be used for preference, see EN 2014. EN 2012:1984 4 BSI 12-1999 7.2 Surface roughness Ra = 0,2 m for the raceway and rolling elements. Ra = 0,8 m for the bore, side faces and cylindrical outer surface. Table Figure Dimensions in millimetres d D CB d1 nom. Tolerances m r Radial int
26、ernal clearance m Permissible static radial load Cs kN Mass kg/1 000 parts . CodeNominal%dmp%Dmp%ds%Ds 05516577,6 0 8 + 2 106,84 + 2 10 2 to 13 06619688,69,29 088227910,60 8 0 9 + 2 11 0,3 to 0,8 11,812 101026 810 12,617,021 12122814,7+ 3 11 19,524 15153291117,73 to 1823,332 171735101220,20 11 + 3 1
27、4 26,942 202042 1214 23,5 0 10 + 3 13 41,272 25254728,6 5 to 20 46,685 303055131534,1 0 13 + 4 17 0,3 to 1 62,6123 Fa max. = where Ys = 2,2 Axial and radial loads may be applied simultaneously. For ultimate static loads, see EN 2063. 0 0,12 0 0,12 Cs Ys - EN 2012:1984 BSI 12-19995 8 Designation Each
28、 bearing shall only be designated as in the following example: where the following codes are applied: NOTEIf necessary, the originator code S 9005 may be introduced between the description block and the identity block. 9 Marking In addition to the manufacturers own marking, each bearing shall be mar
29、ked, on one side face only using the identity block as defined in clause 8 of this standard. Marking position and method are at the manufacturers option. 10 Technical specification Bearings supplied to this standard shall conform with the requirements of EN 2063. GreasesTypes A =ester type greaseE =
30、 with seals B =synthetic hydrocarbon type greaseP = with shields 6 blank BS EN 2012:1989 BSI 12-1999 National appendix A The United Kingdom participation in the preparation of this European Standard was entrusted by the Aerospace Standards Policy Committee (ACE/-) to Technical Committee MCE/7 upon w
31、hich 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 Engineers Ministry of Defence North East Coast Institution of Engineers a
32、nd 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 those given in clause 3 with the exception of ISO 15 for which the corresp
33、onding British Standard is BS 6267:1982 (content identical). BS EN 2012:1989 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 internat
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