1、BRITISH STANDARD AEROSPACE SERIES BS EN 3284:1994 Bearings, airframe rolling Rigid single row ball bearings in steel Diameter series0 and2 Normal clearance category Dimensions and loads The European Standard EN3284:1994 has the status of a BritishStandard UDC 629.7.02:621.822.74.004.1:669.14BSEN 328
2、4:1994 This British Standard, having been prepared under the directionof the Aerospace Standards Policy Committee, waspublished under the authorityof the Standards Boardand comes into effect on 15September1994 BSI 01-2000 The following BSI references relate to the work on this standard: Committee re
3、ference MCE/7 Draft for comment 88/72196 DC ISBN 0 580 21884 8 Cooperating organizations The European Committee for Standardization(CEN), under whose supervision this European Standard was prepared, comprises the national standards organizations of the following countries: Austria Oesterreichisches
4、Normungsinstitut Belgium Institut belge de normalisation Denmark Dansk Standard Finland Suomen Standardisoimisliito, r.y. France Association franaise de normalisation Germany Deutsches Institut fr Normung e.V. Greece Hellenic Organization for Standardization Iceland Technological Institute of Icelan
5、d Ireland National Standards Authority of Ireland Italy Ente Nazionale Italiano di Unificazione Luxembourg Inspection du Travail et des Mines Netherlands Nederlands Normalisatie-instituut Norway Norges Standardiseringsforbund Portugal Instituto Portugus da Qualidade Spain Asociacin Espaola de Normal
6、izacin y Certificacin Sweden Standardiseringskommissionen i Sverige Switzerland Association suisse de normalisation United Kingdom British Standards Institution Amendments issued since publication Amd. No. Date CommentsBSEN3284:1994 BSI 01-2000 i Contents Page Cooperating organizations Inside front
7、cover National foreword ii Foreword 2 1 Scope 3 2 Normative references 3 3 Definition 3 4 Symbols 3 5 Required characteristics 4 6 Designation 6 7 Marking 6 8 Technical specification 6 National annex NA (informative) Committees responsible Inside back cover National annex NB (informative) Cross-refe
8、rences Inside back cover Figure 1 4 Table 1 5BSEN 3284:1994 ii BSI 01-2000 National foreword This BritishStandard has been prepared under the direction of the Aerospace Standards Policy Committee and is the English language version of EN3284:1994 Aerospace series Bearings, airframe rolling Rigid sin
9、gle row ball bearings in steel Diameter series0 and2 Normal clearance category Dimensions and loads, published by the European Committee for Standardization(CEN). EN3284 was produced as a result of international discussions in which the United Kingdom took an active part. A British Standard does not
10、 purport 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 fr
11、ont cover, pages i and ii, the EN title 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 EUR
12、OPISCHE NORM EN3284 June1994 UDC 629.7.02:621.822.74.004.1:669.14 Descriptors: Aircraft industry, airframe bearings, ball bearings, steel, dimensions, static loads English version Aerospace series Bearings, airframe rolling Rigid single row ball bearings in steel Diameter series0 and2 Normal clearan
13、ce category Dimensions and loads Srie arospatiale Roulements pour structures daronefs Roulements en acier, rigides, une range de billes Sries de diamtres0 et2 Catgorie jeux normaux Dimensions et charges Luft- und Raumfahrt Flugwerklager Einreihige Rillenkugellager aus Stahl Durchmesserreihen0 und2 N
14、ormale Lagerluft Mae und Belastungen This European Standard was approved by CEN on1994-06-07. 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-dat
15、e lists and bibliographical references concerning such national standards may be obtained on application to the 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 r
16、esponsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, No
17、rway, Portugal, Spain, 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 1994 Copyright reserved to CEN members Ref. No. EN3284:1994 EEN 3284:1994 B
18、SI 01-2000 2 Foreword This European Standard has been prepared by the European Association of Aerospace Manufacturers(AECMA). After inquiries and votes carried out in accordance with the rules of this Association, this standard has successively received the approval of the National Associations and
19、the Official Services of the member countries of AECMA, prior to its presentation to CEN. This standard was submitted for formal vote, and the result was positive. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, a
20、t the latest by December1994, and conflicting national standards shall be withdrawn at the latest by December1994. According to the CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Ic
21、eland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, United Kingdom.EN 3284:1994 BSI 01-2000 3 1 Scope This standard specifies the characteristics of rigid single row ball bearings in steel 1)of diameter series0 and2 2)designed to withstand only slow rotation
22、s and oscillations under load. They are intended for use between fixed and moving parts of the aircraft structure and their control mechanisms. The airframe rolling bearings defined in this standard are used from54 C to+150 C. However, being lubricated with the following greases: very high pressure
23、grease, ester type(code A), operational range73 C to+121 C or very high pressure grease, synthetic hydrocarbons, general purpose(code B), operational range54 C to+177C(seeEN3280), their field of application when lubricated with code A grease is limited to+121 C. 2 Normative references This European
24、Standard incorporates by dated or undated reference provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply
25、 to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. ISO15, Rolling bearings Radial bearings Boundary dimensions General plan. ISO1132, Rolling bearings Tolerances Definitions. EN2031, Stee
26、l FE-PL31 Hardened and tempered Bars Aerospace series 3) . EN2221, Steel FE-PL31 Hardened and tempered Hollow bars3,5mm k ak 55mm Aerospace series 3) . EN2222, Steel FE-PL31 Hardened and tempered Hand and die forgings Aerospace series 3) . EN3280, Aerospace series Bearings, airframe rolling, rigid o
27、r self-aligning Technical specification. EN3286, Aerospace series Bearings, airframe rolling Rigid single row ball bearings in corrosion resisting steel Diameter series0 and2 Normal clearance category Dimensions and loads. 3 Definition For the purposes of this standard, the following definition appl
28、ies: bearing full complement of balls(without cage), with filling slot 4 Symbols The definitions of tolerances and clearances are given in ISO1132. 1) For new design, use preferably bearings in corrosion resisting steel, seeEN3286 2) SeeISO15 3) Published as AECMA Standard at the date of publication
29、 of this standard % dmp = single plane mean bore diameter deviation % Dmp = single plane mean outside diameter deviation % ds = deviation of a single bore diameter % Ds = deviation of a single outside diameter G a = axial internal clearance G r = radial internal clearance S ia = assembled bearing in
30、ner ring face runout with raceway S ea = assembled bearing outer ring face runout with raceway K ia = radial runout of assembled bearing inner ring K ea = radial runout of assembled bearing outer ringEN 3284:1994 4 BSI 01-2000 5 Required characteristics 5.1 Dimensions Tolerances Clearances Loads Mas
31、s Configuration: seeFigure 1; the bearings are fitted with either seals or shields. Values: seeTable 1. 5.2 Surface roughness Raceways and rolling elements: R a =0.24m Bore, side faces and cylindrical outer surface: R a =0.84m 5.3 Materials F amax. = permissible static axial load C s = permissible s
32、tatic radial load. Inner ring : EN2031 or EN2221 or EN2222,59 HRC to64 HRC Outer ring : EN2031 or EN2221 or EN2222,59 HRC to64 HRC Balls : EN2031,59 HRC to64 HRC Shields : Corrosion resisting material Seals : Polytetrafluoroethylene(PTFE) or polytetrafluoroethylene(PTFE) reinforced with fibreglass.
33、NOTE 1The installation of seals and shields is at the manufacturers option. NOTE 2The shields shall not extend beyond C . Figure 1 EN 3284:1994 BSI 01-2000 5 Table 1 Table 1 Dimensions in millimetres d B C D d1 min. Tolerances 4m r Mass kg/1000 parts . . Code Nominal % % dmp % % Dmp % % ds % % Ds 05
34、 5 7 5 16 7,6 0,3 to 0,8 4 06 6 8 6 19 8,6 9 08 8 9 7 22 10,6 12 10 10 10 8 26 12,6 21 12 12 28 14,7 24 15 15 11 9 32 17,7 32 17 17 12 10 35 20,2 42 20 20 14 12 42 23,5 72 25 25 47 28,6 85 30 30 15 13 55 34,1 0.3 to1 123 d Code Internal clearances 4m Runout tolerances max.4m Starting torque ain mN.m
35、 Permissible static loads bkN Axial max. Radial Axial Radial Code Code Axial Radial G a G r S ia S ea K ia K ea P E F amax. C s 05 100 2 to13 40 40 25 40 2 4 3,1 6,8 06 2,5 5 4,2 9,2 08 3 6,5 5,4 11,8 10 4 7,5 7,7 17 12 5 8,5 8,9 19,5 15 3 to18 6 10 10,6 23,3 17 120 8 12 12,2 26,9 20 10,5 15 18,7 41
36、,2 25 5 to20 13,5 18 21,2 46,6 30 150 19 25 28,5 62,6 a Definition, seeEN3280. b Axial and radial loads may be applied simultaneously. For ultimate static loads, seeEN3280. 0 0,12 0 0,12 0 8 0 8 + 2 10 + 2 10 0 9 + 2 11 + 3 11 0 11 + 3 14 0 10 + 3 13 0 13 + 4 17EN 3284:1994 6 BSI 01-2000 6 Designati
37、on EXAMPLE: NOTEIf necessary, the codeI9005 shall be placed between the description block and the identity block. 7 Marking In addition to the manufacturers own marking, each bearing shall be marked, on one side face only, using the identity block, see6. Marking position and method are at the manufa
38、cturers option. 8 Technical specification SeeEN3280.BSEN 3284:1994 BSI 01-2000 National annex NA (informative) Committees responsible The United Kingdom participation in the preparation of this European Standard was entrusted by the Aerospace Standards Policy Committee(ACE/-) to Technical Committee
39、MCE/7 upon which the following bodies were represented: Ball and Roller Bearing Manufacturers Association Ministry of Defence Society of British Aerospace Companies Ltd. National annex NB (informative) Cross-references The British Standards corresponding to the International Standards referred to in
40、 the text are as follows. International Standard Corresponding BritishStandard ISO15:1981 BS6267:1982 Specification for rolling bearings: boundary dimensions for radial bearings ISO1132:1980 BS6107 Rolling bearings: tolerances Part1:1981 Glossary of termsBS EN 3284:1994 BSI 389 Chiswick High Road Lo
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