1、BRITISH STANDARD AEROSPACE SERIES BSEN 2012:1989 Specification for Bearings-airframe rolling rigid, single row ball bearings in steel diameter series0 and2 Dimensions and loads This European Standard EN2012 has the status of a British Standard. UDC 629.7.02:621.822.74.004.1:669.14BSEN2012:1989 This
2、British Standard, having been prepared under the directionof the Aerospace Standards Policy Committee, waspublished under the authorityof the Board of BSIandcomes into effect on 29September1989 BSI 12-1999 The following BSI references relate to the work on this standard: Committee reference MCE/7 Dr
3、aft 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. Austria Oesterreichisches Norm
4、ungsinstitut 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 National Standards Author
5、ity 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 Switzerland Association suiss
6、e de normalisation United Kingdom British Standards Institution Amendments issued since publication Amd. No. Date of issue CommentsBSEN2012:1989 BSI 12-1999 i Contents Page Cooperating organizations Inside front cover National foreword ii Brief history 2 Text of EN2012 3 National appendix A Inside b
7、ack cover National appendix B Inside back coverBSEN2012:1989 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 EN2012 “Bearings-airframe rolling rigid, single row ball bearin
8、gs in steel diameter series0 and2. Dimensions and loads. Aerospace series”, published by the European Committee for Standardization (CEN). EN2012 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, theEN titl
10、e page, pages2 to6, 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 629
11、.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 series0 and2 Dimensions and loads Aerospace series Roulements pour structures daro
12、nefs roulements en acier, rigides une range de billes sries de diamtres0 et2 Dimensions et charges Srie arospatiale Luff- und Raumfahrt Flugwerklager einreihige Rillenkugellager aus Stahl Durchmesserreihen0 und2 Masze und Belastungen This European Standard was accepted by CEN on1984-06-21. CEN membe
13、rs 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 obtained on ap
14、plication 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 Secretaria
15、t 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 UnitedKingdom. CEN European Committee for Standardization
16、 Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels CEN1984 Copyright reserved to all CEN members Ref. No. EN 2012:1984 EEN2012:1984 BSI 12-1999 2 Brief history This European Standard has been prepared by the European Association of
17、 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 history 2 1 Scope 3 2 Fields of application 3 3 References 3 4 Definitions 3
18、5 Symbols 3 6 Materials 3 7 Required characteristics 3 8 Designation 5 9 Marking 5 10 Technical specification 5 Figure 4 Table 4EN2012:1984 BSI 12-1999 3 1 Scope This standard specifies the characteristics, of rigid single row ball bearings of diameter series0 and2 1)designed to withstand only slow
19、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 the present standard shall be used from54 to+150 C. However, being lubricated with t
20、he following greases: very high pressure grease, ester type (code A), operational range73 to+121 C or very high pressure grease, synthetic hydrocarbons, general purpose (code B), operational range 54to+177 C (refer to EN2063), their field of application when lubricated with code A grease shall be li
21、mited to+121 C. 3 References ISO15:1981, Rolling bearings Radial bearings Boundary dimensions General plan. EN2031, Steel FE-PL31, Hardened and tempered, Bars. EN2063, Bearings, airframe rolling Technical Specification. 4 Definitions Rigid bearings, full complement (without cage), single row, with f
22、illing 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 ISO15. % ds = the deviation of a si
23、ngle 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 amax. = permissible static axial load Y s = coefficient of axial load. Inner ring : Steel
24、 EN2031,59 ato64 HRC. Outer ring : Steel EN2031,59 ato64 HRC. Balls : Steel EN2031,59 ato64 HRC. Shields : Corrosion resisting material Seals : Polytetrafluoroethylene (PTFE): or polytetrafluoroethylene (PTFE) glass fibre reinforced plastic material. a For new design, bearings in corrosion resisting
25、 steel should be used for preference, see EN2014.EN2012:1984 4 BSI 12-1999 7.2 Surface roughness Ra =0,2m for the raceway and rolling elements. Ra =0,8m for the bore, side faces and cylindrical outer surface. Table Figure Dimensions in millimetres d D C B d 1 nom. Tolerances m r Radial internal clea
26、rance m Permissible static radial load C s kN Mass kg/1000 parts . Code Nominal % dmp % Dmp % ds % Ds 05 5 16 5 7 7,6 0 8 + 2 10 6,8 4 + 2 10 2 to13 06 6 19 6 8 8,6 9,2 9 08 8 22 7 9 10,6 0 8 0 9 + 2 11 0,3 to 0,8 11,8 12 10 10 26 8 10 12,6 17,0 21 12 12 28 14,7 + 3 11 19,5 24 15 15 32 9 11 17,7 3 t
27、o18 23,3 32 17 17 35 10 12 20,2 0 11 + 3 14 26,9 42 20 20 42 12 14 23,5 0 10 + 3 13 41,2 72 25 25 47 28,6 5 to 20 46,6 85 30 30 55 13 15 34,1 0 13 + 4 17 0,3 to1 62,6 123 F amax.= where Y s=2,2 Axial and radial loads may be applied simultaneously. For ultimate static loads, see EN2063. 00,12 00,12 C
28、 s Y s -EN2012:1984 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 S9005 may be introduced between the description block and the identity block. 9 Marking In addition to the m
29、anufacturers 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 with the requirement
30、s of EN2063. Greases Types A = ester type grease E = with seals B = synthetic hydrocarbon type grease P = with shields6 blankBSEN2012:1989 BSI 12-1999 National appendix A The United Kingdom participation in the preparation of this European Standard was entrusted by the Aerospace Standards Policy Com
31、mittee (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 Engineers Ministry of D
32、efence 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 those given in clause3 w
33、ith the exception of ISO15 for which the corresponding British Standard is BS6267:1982 (content identical).BSEN 2012:1989 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the UK view o
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