1、J CEN EN*3288 94 3404589 0066207 138 BRITISH STANDARD AEROSPACE SERIES Bearings, airframe rolling - Double row self-aligning ball bearings in steel, cadmium plated - Diameter series 2 - Dimensions and loads The European Standard EN 3288 : 1994 has the status of a British Standard Srie arospatiale -
2、Rouleinents pour structures - daronefs - Roulements en acier, cadniis. rotule, sur deux ranges de billes - Srie de diamtres 2 - Dimensions et charges Luft- und Raumfahrt - Flugwerklager - Zweireihige Pendelkugellager aus Stahl, verkadmet - Durchmesserreihe 2 - MaBe und Belastungen UDC 629.7.02 : i81
3、.X22.7.004.1 : 681.828 : 669.14 : 669.38 BS EN 3288 : 1994 CEN EN*3288 94 m 3404589 O066208 O74 m Amd. No. Date BS EN 3288 : 1994 Text affected This British Standard, having been prepared under the direction of the Aerospace standards Policy Committee, was published under the authority of the Standa
4、rds Board and comes into effect on 15 August 1994 O BSI 1994 The following BSI references relate to the work on this standard: Committee reference MCE!7 Draft for comment 88172196 DC Cooperating organizations The European Committee for Standardization (GEN), under whose supervision this European Sta
5、ndard was prepared, comprises the national standards organizations of the following countries: Austria Belgium Denmark Finland France Germany Greece Iceland Ireland Italy Luxembourg Netherlands Norway Portugal Spain Sweden Switzerland United Kingdom Oesterreichisches Normungsinstitut Institut belge
6、de normalisation Dansk Standardiseringsraad Suomen Standardisoimisliito, r. y. Association francaise de normalisation Deutsches Institut fr Normung e.V. Hellenic Organization for Standardization Technological Institute of Iceland National Standards Authority of Ireland Ente Nazionale Italiano di Uni
7、ficazione Inspection du Travail et des Mines Nederlands Normalisatie-instituut Norges Standardiseringsforbund Instituto Portugus da Qualidade Asociacin Espaola de Normalizacin y Certificacin Standardiseringskommissionen i Sverige Association suisse de normalisation British Standards Institution ISBN
8、 O 580 21890 2 c I CEN EN*3288 94 = 3404589 00bb209 TOO 9 BS EN 3288 : 1994 Contents Page Cooperating organizations Inside front page National foreword 1 Foreword 2 Specification 1 Scope 2 Normative references 3 Definition 4 Symbols 5 Required characteristics 6 Designation 7 Marking 8 Technical spec
9、ification 6 National annexes NA (informative) Committees responsible NB (informative) Cross-references Inside back page Inside back page 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
10、 3288 : 1994 Aerospace series - Bearings, airframe rolling - Double row self-aligniny ball bearings in steel, cadmium plated - Diameter series 2 - Dimensions und loads, published by the European Committee for Standardization (CEN). EN 3288 was produced as a result of international discussions in whi
11、ch the United Kingdom took an active part. Compliance with a British Standard does not of itself confer immunity from legal obligations. i CEN EN*3288 94 3404589 00bbZLO 722 EUROPEAN STANDARD EN 3288 NORME EUROPENNE EUROPISCHE NORM May 1994 Descriptors: Aircraft industry, airframe bearings, seil-ali
12、gning hearings, ball bearings, steel, cadmium, dimensions, static loads English version Aerospace series - Bearings, airframe rolling - Double row self-aligning ball bearings in steel, cadmium plated - Diameter series 2 - Dimensions and loads Srie arospatiale - Roulements pour structures d?aronefs -
13、 Roulements en acier, cadmis, rotule, sur deux ranges de billes - Srie de diamtres 2 - Dimensions et charges Luft- und Raumfahrt - Flugwerklager - Zweireihige Pendelkugellager aus Stahl, verkadmet - Durchmesserreihe 2 - MaBe und Belastungen This European Standard was approved by CEK on 1994-05-19. C
14、EN members are bound to comply with the CENICENELEC 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
15、plication 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 responsibility of a CEN member into its own language and notified to the Central Secretariat ha
16、s 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, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Stan
17、dardization Comit Europen de Normalisation Europisches Komitee fr Il?ormung Central Secretariat: rue de Stassart 36, B-1050 Brussels O 1994 Copyright reserved to CEN members Ref. No. EN 3288 : 1994 E Page 2 EN 3288: 1994 CEN ENa3288 94 3404589 OObbZLL 669 = Foreword This European Standard has been p
18、repared 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 the Official Services of the member countries of AEC
19、MA, 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, at the latest by November 1994, and conflicting natio
20、nal standards shall be withdrawn at the latest by November 1994. According to the Internal Regulations of CENKENELEC, the following countries are bound to implement this European Standard: CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, I
21、celand, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, United Kingdom. CEN ENx3288 94 3404589 0066232 5T5 Page 3 EN 3288 : 1994 1 Scope This standard specifies the characteristics of double row self-aligning ball bearings in steel 1). cadmium plated, of diamet
22、er series 2) designed to withstand only slow rotations, oscillations and/or swivelling 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 from - 54 OC to + 150 OC
23、. However, being lubricated with the following greases : - very high pressure grease, ester type (code A), operational range - 73 OC to + 121 OC or - very high pressure grease, synthetic hydrocarbons, general purpose (code E), operational range - 54 OC to + 177 OC (see EN 32801, their field of appli
24、cation when lubricated with code A grease is limited to + 121 OC. 2 Normative 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 he
25、reafter. For dated references, subsequent amendments to or revisions of any 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. IS0 15 IS0 1 132 EN 2031 EN 2133
26、EN 2221 EN 2222 EN 3280 EN 3289 Rolling bearings - Radial bearings - Boundary dimensions - General plan Rolling bearings - Tolerances - Definitions Steel FE-PL31 - Hardened and tempered - Bars - Aerospace series 31 Cadmium plating of steels with maximum specified tensile strength equal to or less th
27、an 1450 MPa and copper and copper alloys - Aerospace series 3) Steel FE-PL31 - Hardened and tempered - Hollow bars 3.5 mm 5 a S 55 mm - Aerospace series 3) Steel FE-PL31 - Hardened and tempered - Hand and die forgings - Aerospace series 3) Aerospace series - Bearings, airframe rolling, rigid or self
28、-aligning - Technical specification Aerospace series - Bearings, airframe rolling - Double row self-aligning ball bearings in corrosion resisting steql - Diameter series 2 - Dimensions and loads 3 Definition For the purposes of this standard, the following definition applies : Bearing : full complem
29、ent of balls (without cage). 4 Symbols The definitions of tolerances and clearances are given in IS0 1 132. single plane mean bore diameter deviation single plane mean outside diameter .deviation deviation of a single bore diameter deviation of a single outside diameter axial internal clearance radi
30、al internal clerance radial runout of assembled bearing inner ring radial runout of assembled bearing outer ring permissible static axial load permissible static radlal load static equivalent radial load bearing axial load. axial component of actual bearing load bearing radial load. radial component
31、 of actual bearing load. 1) For new design, use preferably bearings in corrosion resisting steel, see EN 3289 21 See IS0 15 3) Published as AECMA Standard at the date of pubiicatin of this standard CEN ENa3288 94 3404589 0066233 Y31 Page 4 EN3288: 1994 5 Required characteristics 5.1 Configuration :
32、see figure 1 ; the bearings are fitted with either seals or shields. Values : see table 1 ; the dimensions and tolerances apply after protection. Dimensions - Tolerances - Clearances - Loads - Mass 5.2 Surface roughness Raceways and rolling elements : Ra = 0.2 pm Bore, side faces and cylindrical out
33、er surface : R, = 0.8 pm The values apply prior to cadmium plating. 5.3 Materiais Inner ring : EN 2031 or EN 2221 or EN 2222, 59 HRC to 64 HRC Outer ring : EN 2031 or EN 2221 or EN 2222, 59 HRC to 64 HRC Balls : EN 2031, 59 HRC to 64 HRC Shields : Corrosion resisting material Seals : Polytetrafluoro
34、ethvlene (PTFE) or polytetrafluoroethylene (PTFE) reinforced with fibreglass. 5.4 Surface treatment EN 21 33 thickness, 5 pm to 12 pm, on the inner and outer rings, the bore and raceways are not cadmium plated. As soon as possible after plating, and within 16 h de-embrittlement heat treatment shall
35、be carried out at a temperature and for a time kompatible with the performance requirements of the bearing) which shall be subject to written approval of the qualifying authorities. I B F 9 L -tt- $1 -I- Type with shields Code P 1 Type with seals Code E NOTE : The installation of seals and shields i
36、s at the manufacturers option. Figure 1 CEN EN*3288 94 W 3404589 0066214 378 M r 0.3 to 0.8 Mass kg11000 pans 9 14 30 57 4 62 75 110 170 hge 5 BS EN 3288 : 1994 d Ode 05 - 06 O8 10 12 15 17 20 - - - - - Starting torque 2) internai clearances Fim tolerances max. pm Axial max. Radial radial in Ga G, S
37、pecial Normal Group Special Normal Group CodeR CodeN Code L Code R Code N CodeL group group 3 group group 3 Ki(I 70 2 to 6 1 O0 2to13 loto20 2 to 7 25 120 80 3to9 3to18 13to23 160 i ao Sto10 5to20 15to25 E Code Code 4 4,5 5,5 7.5 9 12 40 ia 23 8 9 10 12 14 18 25 35 1 Permissible static loads 3) kN A
38、xial Radial 1.2 I 3.7 I 4.4 14,; 7,6 24.3 1 10.2 I 32.6 I Page 6 EN 3288 : 1994 Description block BEARING CEN EN*3288 94 = 3404589 0066235 204 Identity block EN3288AN1 OP 6 Designation EXAMPLE : Number of this standard Code for grease type bee li Code for axiallradial internal clearance (see table 1
39、) Diameter code d (see table 1 i Code for type (see figure 1 i NOTE : If necessary, the code 19005 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 blo
40、ck, see 6. Marking position and method are at the manufacturers option. . 8 Technical specification See EN 3280. CEN EN83288 94 m 3404589 OObb21b 140 W BS EN 3288 : 1994 National annex NA (informative) Committees responsible The United Kingdom participation in the preparation of this European Standa
41、rd 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 Aerospace Companies Ltd. National annex NB (informative) Cross-
42、references The British St,andards Corresponding t,o the international standards referred to in the text are as follows. International standard Corresponding British Standard IS0 15 : 1981 IS0 76 : 1987 IS0 1132 : 1980 BS 6267 : 1982 Specificutio.11 for rolli?ig beuririgs : boundary dimensions for ra
43、dial bearings HS 5645 : 1987 Specl:ficationfor static Eoa ratings for rolling bearings BS 6107 Rolling benrirzys : to1erunce.s Part 1 : 1981 Glossury of terms CEN EN*3288 94 3404589 0066237 087 BS EN 3288 : 1994 BSI 2 Park Street London W1A 2BS BSI Linford Wood Milton Keynes MK14 6LE 9408 - 4 - 0.4k
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