1、BRITISH STANDARD AEROSPACE SERIES BS EN 3056:1994 Bearings, airframe rolling Rigid double row ball bearings in steel Dimensions and loads The European Standard EN3056:1994 has the status of a BritishStandard UDC 629.7.02:621.822.74.004.1:669.14BSEN3056:1994 This BritishStandard, having been prepared
2、 under the directionof the Aerospace Standards Policy Committee, waspublished under the authorityof the Standards Boardand comes into effect on 15July1994 BSI 01-2000 The following BSI references relate to the work on this standard: Committee reference MCE/7 Draft for comment 88/72195 DC ISBN 0 580
3、22202 0 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 Normungsinstitut Belgium Institut belge de normalisati
4、on 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 Iceland Technological Institute of Iceland Ireland National Standards Authority of
5、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 Normalizacin y Certificacin Sweden Standardiseri
6、ngskommissionen i Sverige Switzerland Association suisse de normalisation United Kingdom BritishStandards Institution Amendments issued since publication Amd. No. Date CommentsBSEN3056:1994 BSI 01-2000 i Contents Page Cooperating organizations Inside front cover National foreword ii Foreword 2 1 Sco
7、pe 3 2 Normative references 3 3 Definitions 3 4 Symbols 3 5 Required characteristics 4 6 Designation 5 7 Marking 6 8 Technical specification 6 National annex NA (informative) Committees responsible Inside back cover National annex NB (informative) Cross-reference Inside back cover Figure 1 4 Table 1
8、 5BSEN3056:1994 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 EN3056:1994 Aerospace series Bearings, airframe rolling Rigid double row ball bearings in steel Dimensions an
9、d loads, published by the European Committee for Standardization (CEN). EN3056 was produced as a result of international discussions in which the United Kingdom took an active part. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards
10、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, pagesi andii, theEN title page, pages2 to6, an inside back cover and a back cove
11、r. 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 3056 April 1994 UDC 629.7.02:621.822.74.004.1:669.14 Descriptors: Aircraft ind
12、ustry, airframe bearings, ball bearings, steel, dimensions, static loads English version Aerospace series Bearings, airframe rolling Rigid double row ball bearings in steel Dimensions and loads Srie arospatiale Roulements pour structures daronefs Roulements en acier, rigides, deux ranges de billes D
13、imensionset charges Luft- und Raumfahrt Flugwerklager Zweireihige Rillenkugellager aus Stahl Mae und Belastungen This European Standard was approved by CEN on1994-04-27. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
14、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 application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, Fre
15、nch, German). A version in any other language made by translation under the responsibility 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,
16、France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, 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 Brussel
17、s 1994 Copyright reserved to CEN members Ref. No. EN 3056:1994 EEN3056:1994 BSI 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 sta
18、ndard has successively received the approval of the National Associations and 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 nati
19、onal standard, either by publication of an identical text or by endorsement, at the latest by October1994, and conflicting national standards shall be withdrawn at the latest by October1994. According to the CEN/CENELEC Internal Regulations, the following countries are bound to implement this Europe
20、an Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, United Kingdom.EN3056:1994 BSI 01-2000 3 1 Scope This standard specifies the characteristics of rigid double row ball bearings in
21、steel 1)designed to withstand only slow rotations and oscillations under load. They are intended for use in the hubs of bell crank levers fitted with a single bearing. The airframe rolling bearings defined in this standard are used from54 C to+150 C. However, being lubricated with the following grea
22、ses: very high pressure 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+177 C (seeEN3280), their field of application when lubricated with code A grease is limited to+121 C. 2 Normati
23、ve references This European 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
24、 of these publications apply 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. ISO 1132, Rolling bearings Tolerances Definitions. EN 2031, Steel FE-PL31 Hardened and tempered Bars Aerospa
25、ce series 2) . EN 2221, Steel FE-PL31 Hardened and tempered Hollow bars3,5mmk ak 55mm Aerospace series 2) . EN 2222, Steel FE-PL31 Hardened and tempered Hand and die forgings Aerospace series 2) . EN 3058, Aerospace series Bearings, airframe rolling Rigid double row ball bearings in corrosion resist
26、ing steel Dimensions and loads. EN 3280, Aerospace series Bearings, airframe rolling, rigid or self-aligning Technical specification. 3 Definition For the purposes of this standard, the following definition applies: bearing full complement of balls (without cage), with filling slot 4 Symbols The def
27、initions of tolerances and clearances are given in ISO1132. 1) For new design, use preferably bearings in corrosion resisting steel, seeEN3058. 2) Published as AECMA Standard at the date of publication of this standard. % dmp = single plane mean bore diameter deviation % Dmp = single plane mean outs
28、ide diameter deviation % Ds = deviation of a single outside diameter G d = diagonal internal clearance S ia = assembled bearing inner 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 o
29、f assembled bearing outer ring F amax. = permissible static axial load C s = permissible static radial load.EN3056:1994 4 BSI 01-2000 5 Required characteristics 5.1 Dimensions Tolerances Clearances Loads Mass Configuration: seeFigure 1; the bearings are fitted with either seals or shields. Values: s
30、eeTable 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 Inner ring : EN2031 or EN2221 or EN2222,59HRC to64HRC Outer ring : EN2031 or EN2221 or EN2222,59 HRC to64HRC Balls : EN2031,59 HRC to64HRC Shields : Co
31、rrosion resisting material Seals : Polytetrafluoroethylene (PTFE) or polytetrafluoroethylene (PTFE) reinforced with fibreglass. NOTE 1The installation of seals and shields is at the manufacturers option. NOTE 2The shields shall not extend beyond C. Figure 1 EN3056:1994 BSI 01-2000 5 Table 1 6 Design
32、ation EXAMPLE: NOTEIf necessary, the codeI9005 shall be placed between the description block and the identity block. Dimensionsinmillimetres d B C D d1 min. Tolerances 4m r Mass kg/1000 parts . Code Nominal % dmp % Dmp % Ds 08 8 22 17 22 10,6 J7 0,3 to 0,8 30 10 10 24 18 26 12,6 52 12 12 28 14,7 60
33、15 15 26 20 32 17,7 80 17 17 28 22 35 20,2 100 20 20 32 26 42 23,5 165 d Code Diagonal internal clearance G d 4m Runout tolerances max. 4m Starting torque a in mN.m Permissible static loads b kN Axial Radial Code Code Axial Radial S ia S ea K ia K ea P E F amax. C s 08 50 to250 40 40 25 40 4 6 10,9
34、24 10 6 9 15,6 34,4 12 7 11 18,4 40,4 15 9 14 21,4 47 17 11 17 24,5 53,8 20 15 23 37,7 83 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 + 2 11 0 9 + 3 14EN3056:1994 6 BSI 01-2000 7 Marking In addition to the m
35、anufacturers own marking, each bearing shall be marked, on one side face only, using the identity block, see6. Marking position and method are at the manufacturers option. 8 Technical specification SeeEN3280.BSEN3056:1994 BSI 01-2000 National annex NA (informative) Committees responsible The United
36、Kingdom participation in the preparation of this European Standard was entrusted by the Aerospace Standards Policy Committee (ACE/-) to Technical Committee MCE/7 upon which the following bodies were represented: Ball and Roller Bearing Manufacturers Association Ministry of Defence Society of British
37、 Aerospace Companies Ltd. National annex NB (informative) Cross-reference The BritishStandard corresponding to the International Standard referred to in the text is as follows. International Standard Corresponding BritishStandard ISO 1132:1980 BS 6107 Rolling bearings: tolerances Part 1:1981 Glossar
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