1、I , , AECMA PREN3283 87 W 31132313 0005210 3 W . 14 th September 1987 A. E.C. M .A. STANDARD NORME A.E.C.M.A. A.E.C.M.A. NORM after the date of publication decision A.E.C.M.A. 88, Bd. Malesherbes Mr. MQUTARDE 75008 PARIS - FRANCE prE N 328 1 Issue P 1 September 1987 EDITE PAR LASSOCIATION EUROPENNE
2、DES CONSTRUCTEURS DE MATERIEL AEROSPATIAL 88, boulevard Malesherbes, 75008 PARIS -TEL. 45-63-82-85 UDC : 629.7.02 : 621.822.74.004.1 : 669.14 Key words : Aircraft industry, airframe bearings, ball bearings, steel, dimensions, static loads ENGLISH VERSION Aerospace series Bearings-airframe rolling ri
3、gid, single row ball bearings in steel diameter series 8 and 9 Dimensions, torques, clearances and loads Srie arospatiale Luft- und Raumfahrt Roulements pour structures daronefs Flugwerklager roulements rigides une range de billes sries de diamtres 8 et 9 Dimensions, couples, jeux et charges einreih
4、ige Rillenkugellager Durchmesserreihen 8 und 9 Mae, Momente, Lagerluft und Belastungen en acier aus Stahl This .Aerospace Series. pre-standard has been drawn up under the responsibility of AECMA (Association Europenne des Constructeurs de Matriel Arospatial). It is published on green paper for the n
5、eeds of AECMA-Members. It has been technically approved b y the experts of the concerned AECMA Commission following comment by the Member countries. Subsequent to the publication of this pre-standard, the technical content shall not be changed to an extent that interchangeability is affectkd, physic
6、ally or functionally, without re-identification of the standard. After examination and signature of the AECMA Standard Checking Centre (NPS) and formal agreement of the Official Services of the Member countries it will be submitted as a draft European Standard to CEN (European Committee for Standard
7、ization) for final vote. 0 aecma 1987 Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-_ _ . - ! AECMApPREN3281-8? 1012311 O005211 5 prEN3281 Page 2 For
8、eword The characteristics of the bearings covered by this standard are identical to those of EN2009 with regard to configuration, dimensions, tolerances, mass and loads. They differ from them by the addition of new characteristics : - starting torques ; - internal axial clearances ; - special group
9、for the internal radial clearance. Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-1 Scope This standard specifies the characteristics of rigid single
10、row ball bearings of diameter series 8 and 9 1) designed to withstand only slow rotations and oscillations under load, I 4 Definition They are intended for use between fixed and moving parts of the aircraft structure and their control mechanisms, I Rigid bearings, full complement of balls (without c
11、age), single row of- balls with filling slot. 2 Field of application The airframe rolling bearings defined in this standard shall be used from -54 to i-150 OC. However, being lubricated with the following greases : - very high pressure grease, ester type (code A), operational range -73 to i-121 OC o
12、r - very high pressure grease, synthetic hydrocarbons, general purpose (code B), operational range -54 to +177 OC (refer to EN3280) ; their field of application when lubricated with code A grease shall be limited to 3.121 “C. 0 3 References IS0 15-1981, Rolling bearings - Radial bearings - Boundary
13、dimensions - General plan IS0 1132-1980, Rolling bearings - Tolerances - Definitions EN2031, Steel FE-PL31 - Hardened and tempered - Bars - Aerospace series EN2221, Steel FE-PL31 - Hardened and tempered - Hollow bars 3,5 mm a 55 mm - Aerospace series EN2222, Steel FE-PL31 - Hardened and tempered - H
14、and and die forgings - O Aerospace series EN3280, Bearings - airframe rolling - Technical specification - Aerospace series 1) See IS0 15. O Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking pe
15、rmitted without license from IHS-,-,-:AECMApPREN3283 87 W 30323L3 0005233 7 = prEN3281 Page 4 5 Symbols The definition of tolerances and of clearances are given in IS definition of loads in EN3280. dmp A *,mp CS = permissible static radial load Fa roux.= permissible static axial load = axi.al intern
16、al clearance Ga GY = radial internal clearance = single plane mean bore diameter = single plane mean outside diameter 1132 and L = radial runcut of assembled bearing outer ring = radial runout of assembled bearing inner ring = assembled bearing outer ring face runout with raceway (groove) = assemble
17、d bearing inner ring face runout with raceway (groove) = coefficient of axial load Kea Kia Sea ia Y S 6 Required characteristics 6.1 Dimensions - Tolerances - Clearances - Loads - Mass Values : see table. Configuration : see figure ; the bearings can be assembled with either seals or shields. 6.2 Su
18、rface roughness Raceway and rolling elements : Ra = 0,2 pm Bore, side faces and cylindrical outer surface : Ra = 0,8 pm. 6.3 Materials Inner ring : Steel EN2031 or EN2221 or EN2222, 59 to 64 HRC i). Outer ring : Steel EN2031 or EN2221 or EN2222, 59 to 64 HRC i). Balls : Steel EN2031, 59 to 64 HRC 1)
19、. Shields : Corrosion resisting material. Seals : Polytetrafhoroethylene (PTFE) or polytetrafluoroethylene (PTFE), coated glass fabric material. 1) For new designs, bearings in corrosion resisting steel should be used preferably, see EN3283. Copyright Association Europeene des Constructeurs de Mater
20、iel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-a O internal clearances prEN3281 Page 5 Runout tolerances Starting Permissible Mass max. pm torque i) static kg/ C 6 im 2 to 13 3 to 18 5 to 20 6 to 20 6 to 23 8
21、 to 28 Bearing with shields - Code P radial- (Sial (Sea) dD 40 40 Detail W applicable to bore and outer surface 22,O I 29 I 31,8 The process for installation of seals and shields is at the manufacturers option, 38 Figure 1 32.0 I 47 I 43,l Tolerances 55 O -10 - O -12 - O -15 - - axial max. Ga - 100
22、- 120 150 - I) Definition : see EN3280 where Ys = 2,2 F max.= - CS Ys Axial and radial loads may be applied simultaneously. For ultimate static loads, see EN3280. I in-aN.m Iradial load I IOO 25 II I Shields Seals 5,5 17,6 17.3 20 Copyright Association Europeene des Constructeurs de Materiel Aerospa
23、tial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-_- I AECMA PREN3281 87 m 1012311 0005215 2 m prEN3281 Page 6 7 Designation Each bearing shall only be designated as in the following example : Identity block I Description
24、block BEARING A = Code for ester type ! grease Number of EN standard 10 = diameter code of d (see table) P = code for type with shields where the following codes are applied : Greases A = ester type grease B = synthetic hydrocarbon type grease E = with seals P = with shields Note : If necessary, the
25、 originator code S9005 may be introduced between the description block and the identity block, 8 Marking In addition to the manufacturers own marking, each bearing shall be marked, on one side face only using the identity block as defined in clause 7 of this standard. Marking position and method are
26、 at the manufacturers option. 9 Technical specification Bearings supplied to this standard shall conform with the requirements of EN3280. Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
