1、AECMA PREN3541 90 U 10L231L 0006067 7 U A. E. C. M .A. STAN DAR D prEN 3541 NORME A.E.C.M.A. Edition 1 A.E.C.M.A. NORM August 1990 EDITE PAR LASSOCIATION EUROPENNE DES CONSTRUCTEURS DE MATRIEL AEROSPATIAL 88, boulevard Malesherbes, 75008 PARIS - TEL. 45-63-82-85 UDC : 629.7.05 : 621.827.1 : 621.85.0
2、53.004.1 : 621 -828 Key words : Aircraft industry, flight control, rod ends, end fitting with self-aligning ball bearing, threaded shank, dimensions, static loads. . ENGLISH VERSION Aerospace series Rod ends, adjustable, self-aligning ball bearing with threaded shank Dimensions, torques, clearances
3、and loads Srie arospatiale Embouts rglables rotule sur billes et tige filete Dimensions, couples, jeux et charges Luft- und Raumfahrt Einstellbare senkpfe mit Pendelkugellager und Gew indesc haf t Mae, Momente, Lagerluft und Belastungen This .Aerospace series standard has been drawn up under the res
4、ponsibility ofAECMA (Association Europenne des Constructeurs de Matriel Arospatial. It is published on yellow paper in three equivalent versions (English, French, German). It will be submitted as a draft European Standard to CEN (European Committee for Standardization) for final vote. Approved by CO
5、MITE DE NORMALISATION of A.E.C.M;A. 199Q-08-24 i I 1 The equivalent versions in French and German languages can be supplied by B.N.A.E, 8, rue Moreau-Vauthier 92100 BOULOGNE-BILLANCOURT - FRANCE aecma 190 - +; O .: a AECMA PREN35L1L 90 I LOL231L 0006069 O W P prEN 3541 Page 3 1 Scope This standard s
6、pecifies the characteristics of adjustable rod ends with self-aligning ball bearing and threaded shank. They consist of : - a rod end comprising : . circumferential groove to identify location ; . either seals or shields ; . an optional longitudinal groove for locking purpose ; - an inner ring with
7、balls. 2 Field of- application These rod ends are intended for use with flight control rods or rods for aerospace structures. They are intended to be used in the temperature range : - 54 OC to 4- 150 OC. However, being lubricated with the fallowing greases (see EN 2067) : - Extreme pressure grease,
8、type ester (code A), operating range - 73 OC to f 121 OC - Extreme pressure grease, type synthetic hydrocarbon general usage (code B), operating range - 54 OC to -I- 177 OC their field of application in the code A is limited to 4- 121 OC. 3 References IS0 1132, IS0 3353, IS0 5855-2, EN 2031, EN 2067
9、, EN 2099, EN 2133, EN 2135, Rolling bearings - Tolerances - Definitions Aerospace construction - Rolld threads - and lead threads Aerospace construction - MJ threads - Part2 : Limit dimensions for bolts and nuts Steel FE-PL31 - Hardened and tempered bars - Aerospace series 1) Aerospace series - Rod
10、 ends, self-aligning ball bearing -Technical specification 2) Aerospace series - Steel FE-PL72 - Case hardening, hardened and tempered - Bars Cadmium plating of steel with maximum speci d tensile strength equal to or less than 1450 MPa and copper and copper alloys - Aerospace Series 1) Aerospace ser
11、ies - Steel FE-PL61 - Case hardening, hardened and tempered - Bars De G 40 mm 2). D, G 100 mm 3) 4 Symbols Ads = Deviation of a single bore diameter Adrnp = Single plane mean bore- diameter deviation 0 = Angular displacement permissible between inner and outer ring axis of a set of aligning bearing
12、Ys = Axial load coefficient 5 Required Characteristics 5.1 Configuration : see figure. Dimensions, tolerances and masses : see figure and/or table 1 and 2 ; values after cadmium plating. Dimensions - Tolerances - Masses 1) Published as AECMA standard at the date of publication of the present sfandar
13、d. 2) Pubtished as AECMA pre-standard at the date of publication of the present standard 3) In ureparation at the date of publication of the present standard. Previous page A - - - i -k blank AECMA PREN3541 90 m 1012311 0,OObOO 7 m prEN 3641 Page 4 5.2 Surface roughness See figure, values prior to c
14、admium plating. S.3 See table 2. Loads, rotational starting torques and internal clearances 5.4 Material Rod end : steel EN 21 35 or EN 2099 ; heat treated to obtain : - by case hardening, hardening and tempering a surface hardness of 2 58 HRC on the raceway ; - by hardening and tempering a strength
15、 R, 2 830 MPa on the whole rod end, Inner ring : steel EN 2031, Balls : steel EN 2031. Shields : corrosion resisting material. Seals : polytetrafluoroethylene (PFTE) or glass fabric reinforced polytetrafliioroethylene (PFTE). 5.5 Surface treatment Rod end : all surfaces except for the raceway cadmiu
16、m plated according to EN 21 33,7pm to 20pm except threads 5 pm to 1 O /im ; chromate passivation optional. B-B Incomplete tbreacls according to IS0 3353 threads according Break sharp corners A-A 9 dl Inner ring - K T y1 With seals L With shields L Rodend of bottoiii of groove = d3 min. (see ISO 5855
17、12) Figure NOTE : The circumferential groove and the longitudinal groove over the distance F shall be painted red. II d Toleranccs Codo Noniiiial diaiiieter (Pl) = iniiiimum length of useful threads. AECMA PREN3541 90 m LO12311 0006072 O m prEN 3641 Page 6 6 Designation Each rod end shall only be de
18、signated as in the following example : D es cri p t i o n bloc IC ROD END Id entity b I oc IC Number of EN Standard Code letter for thread (see below) Code for nominal diameter d (see table 1) Code letter for shields or seals (see figure) Code for longitudinal groove (see below) Code letter for grea
19、se (see clause 2) where the following codes are applied : L = left hand thread R = right hand thread K = with groove T = without groove NOTE ; If necessary, the originator code 19005 may be introduced between the description block and identity block. 7 Marking In addition to the manufacturers own marking, each rod end shall be marked (see figure) using the identity block specified in clause 6. 8 Technical specification See EN 2067.
