1、BRITISH STANDARD AEROSPACE SERIES BS EN 2498:1990 Specification for Rod ends, adjustable self-aligning plain bearing, with self-lubricating liner and threaded shank Dimensions and loads This European Standard EN2498 has the status of a British Standard.BSEN2498:1990 This British Standard was publish
2、ed under the authority ofthe Board of BSI and comes intoeffect on 31 December 1990 BSI 01-2000 The following BSI references relate to the work on this standard: Committee reference ACE/14 Draft for comment 88/71900 DC ISBN 0 580 19140 0 Cooperating organizations The European Committee for Standardiz
3、ation, under whose supervision this European Standard was prepared, comprises the national standards organizations of the following Western European countries. Austria Oesterreichisches Normungsinstitut Belgium Institut belge de normalisation Denmark Dansk Standardiseringsraad Finland Suomen Standar
4、disoimisliito, 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 Ireland Italy Ente Nazionale Italiano di Unificazione Luxemb
5、urg 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 Standardiseringskommissionen i Sverige Switzerland Association suisse de n
6、ormalisation UnitedKingdom British Standards Institution Amendments issued since publication Amd. No. Date of issue CommentsBSEN2498:1990 BSI 01-2000 i Contents Page Cooperating organizations Inside front cover National foreword ii Brief history 2 Text of EN 2498 3 National appendix A Inside back co
7、ver National appendix B Inside back coverBSEN2498:1990 ii BSI 01-2000 National foreword This British Standard has been prepared under the direction of the Aerospace Standards Policy Committee and is the English language version of EN2498 “Aerospace series. Rod ends, adjustable self-aligning plain be
8、aring with self-lubricating liner and threaded shank. Dimensions and loads”, published by the European Committee for Standardization (CEN). EN2498 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 necessar
9、y 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 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 2498 June 1990 UDC:
11、 629.07.02 + 05:621.827.1:621.85.053.004.1:621.828 408.2.72 Key words: Aircraft industry, flight control, rod ends, swivel-end pieces, linings, self-lubricating parts, threaded ends, dimensions, static loads. English version Aerospace series Rod ends, adjustable self-aligning plain bearing with self
12、-lubricating liner and threaded shank Dimensions and loads Srie arospatiale Embouts rglables rotule garniture autolubrifiante et tige filete Dimensions et charges Luft- und Raumfahrt Einstellbare senkpfe mit Gelenklager mit selbstschmierender Beschichtung und Gewindeschaft Mae und Belastungen This E
13、uropean Standard was accepted by CEN on 1990-01-10. 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 refere
14、nces concerning such national standards may be obtained 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
15、 into its own language and notified to CEN Central Secretariat has the same status as the official versions. CEN members are the national standards organizations of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxemburg, Netherlands, Norway, Portugal, Spain,
16、Sweden, Switzerland and UnitedKingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels CEN 1990 Copyright reserved to all CEN members Ref. No. EN 2498:1990 EEN2498:1990 2 BSI 01-2000 Bri
17、ef history 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 the Offici
18、al Services of the member countries of AECMA, prior to its presentation to CEN. According to the Common CEN/CENELEC Rules, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherla
19、nds, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. Contents Page Brief history 2 1 Scope and field of application 3 2 References 3 3 Symbols 3 4 Required characteristics 3 5 Designation 5 6 Marking 6 7 Technical specification 6 Figure 4 Table 1 5 Table 2 5EN2498:1990 BSI 01-2000 3
20、1 Scope and field of application This standard specifies the characteristics of adjustable rod ends consisting of: a self-aligning ball bearing with self-lubricating liner EN2501; a rod end body with threaded shank consistingof: a circumferential groove to identify location; an optional longitudinal
21、 groove for locking purposes. These rod ends are intended for use with flight control rods or rods for aerospace structures. They are provided to be used within the temperature range: 55 C to+150 C. 2 References ISO 1132:1980, Rolling bearings Tolerances Definitions. ISO 3353, Aerospace construction
22、 Rolled threads Runout and lead threads. ISO 5855-1, Aerospace MJ Threads Part1:General requirements. ISO 5855-2, Aerospace MJ Threads Part2:Limit dimensions for bolts and nuts. EN 2064, Bearings, spherical plain in corrosion resisting steel with self-lubricating liners Technical specification Aeros
23、pace series 1) . EN 2068, Aerospace series Rod ends with self-lubricating, self-aligning bearings Technical specification 2) . EN 2133, Cadmium plating of steels with maximum specified tensile strength equal to or less than1450MPa, and copper and copper alloys Aerospace series 1) . EN 2137, Steel FE
24、-PL75 1100 MPa u R mu1250MPa Bars D eu 100mm Aerospace series 1) . EN 2475, Steel FE-PL74 1100 MPa u R mu1300MPa Bars D eu 100mm Aerospace series 1) . EN 2476, Steel FE-PL74 1100 MPa u R mu1300MPa Forgings D eu 100mm Aerospace series 1) . EN 2501, Aerospace series Bearings, spherical plain in corros
25、ion resisting steel with self-lubricating liners and wide inner ring Dimensions and loads. EN 2790, Aerospace series Rod ends, adjustable self-aligning plain bearing with self-lubricating liner and threaded shank Dimensions and loads 3) . 3 Symbols 4 Required characteristics 4.1 Dimensions Tolerance
26、s Configuration: SeeFigure. Dimensions and tolerances: SeeFigure andTable 1 andTable 2, values after cadmium plating. 4.2 Surface roughness SeeFigure, values prior to cadmium plating. 4.3 Loads and rotational starting torques SeeTable 2. 1) Published as AECMA standard. 2) In preparation. 3) Publishe
27、d as AECMA pre-standard. % ds = deviation of a single bore diameter a % dmp = single plane mean bore diameter deviation a = maximum displacement angle which can be formed by the outer ring with the inner ring, with the spherical track of the outer ring fully in contact with the inner ring C25 = perm
28、issible dynamic radial load by25000cycles (for definition see EN2064). a For definition of tolerances see ISO1132.EN2498:1990 4 BSI 01-2000 4.4 Materials Rod end body: Steel EN2137 or EN2475 or EN2476 Hardness 33 u HRC u 39. Plain bearing: See EN2501. 4.5 Surface treatment Rod end body: Cadmium plat
29、ing EN2133, 7m to20m except threads5m to10m chromate passivation optional. NOTEThe circumferential groove and the longitudinal groove over the distance F shall be painted red. Figure EN2498:1990 BSI 01-2000 5 Table 1 Table 2 5 Designation Each rod end shall only be designated as in the following exa
30、mple: With application of the following codes: NOTEIf necessary, the originator codeI9005 may be introduced between the description block and identity block. Dimensions in millimetres d A E Thread adesignation F b G H L M N S Mass . g Code Nominal diameter min. min. 0,5 06 c 6 22,5 8,2 MJ 10 1,25 4h
31、6h 22 37 37 54 2,4 8,0 0,8 46 08 c 8 26,0 10,2 MJ 12 1,25 4h6h 25 42 42 62 10,2 76 10 10 32,0 13,2 MJ 14 1,5 4h6h 31 48 48 73 3,2 12,2 1,0 135 a Thread: According to ISO5855-1 andISO 5855-2, rolled. b F: Minimum length of engaged threads, includes thickness of lock washer and height of nut. c The co
32、des06 and08 shall not be used for new design (see EN2790). Dimensions in millimetres After swaging of the plain bearing in the rod end body Spherical plain bearings with self-lubricating liner EN2501 (Reference only) Permissible dynamic radial load a C 25 kN Axial push out load kN Starting torque N.
33、m Ultimate static load kN c B C D d d d 1 min. r in degrees Nom. Tolerances m % dmp % ds 16,6 4,5 0,45 to 1,30 27 14 8 18 6 0 8 +2 10 9,0 0,3 to 0,8 9 25,2 6,5 0,70 to 2,00 39 15 10 21 8 11,0 8 38,6 b 10,5 58 20 13 26 10 13,5 10 a In direction of the axis of the rod end. b This load is a maximum of
34、2/3 ultimate static load of the rod end and not the load from EN2501. c Ultimate loads are listed because failure will occur in the rod end and not the bearing. Users shall apply their own factors to obtain the permissible static load. d The relevant fit of the plain bearing in the housing to be to
35、manufacturers option. L = left hand thread R = right hand thread K = with longitudinal groove T = without longitudinal groove +0,2 0 +0,1 0 +0,5 1 +0,1 0 0 0,1 0 0,06 +0,1 0EN2498:1990 6 BSI 01-2000 6 Marking In addition to the manufacturers own marking, each rod end shall be marked using the identi
36、ty block specified in clause5. The position and method of marking are at the manufacturers option, it shall not have any detrimental effect on the rod end. 7 Technical specification Rod ends supplied according to this standard shall conform with the requirements of EN2068.BSEN2498:1990 BSI 01-2000 N
37、ational 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 ACE/14 upon which the following bodies were represented: British Independent Steel Producers Association Civil Avi
38、ation Authority (Airworthiness Division) Federation of Wire Rope Manufacturers of Great Britain Ministry of Defence Society of British Aerospace Companies Ltd. Stainless Steel Wire Export Group National appendix B The British Standards corresponding to the European and International Standards referr
39、ed to in the text are identical in number and title to those given in clause2, with the exception of ISO1132, ISO3353, ISO5855-1 and ISO5855-2 for which the corresponding British Standards are BS6107-1:1981 (identical), BSA231:1982 (identical), BS6293-1:1982 (identical) and BS6293-2:1982 (identical)
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