1、AECMA PREN2770 Bb 1iOL23JL 0009LB2 B H-, A. E .C .M .A. STAN DARD rEN2790 NORME A.E.C.M.A. A.E.C.M.A. NORM Issue P 1 April 1986 UDC 629.7.02+05621.827,1:621.85.053.004.1:621.828-408.2.72 Key words : Aircraft industry, flight control, rod-ends, swivel - ends pieces, linings, self lubricating parts, t
2、hreaded ends, dimensions, static loads ENGLISH VERSION Aerospace series Rod-ends, adjustable self-aligning plain bearing with self-lubricating liner and threaded shank Dimensions and loads . .- Srie arospatiale Embouts rglables rotule garniture autolubrifiante tige filete Dimensions et charges Luft-
3、 und Raumfahrt Einstellbare Osenkpfe mit Gelenklager mit selbstschmierender Beschichtung und Gewindeschaft Mae und Belastungen This standard is initially published on green paper for the needs of AECMA-Members (Association Europenne des Constructeurs de Matriel Arospatial). It has been technically a
4、pproved by the experts of the concerned AECMA Commission following comment by the manufacturers of the Member countries. After examination and signature of the AECMA Standard Checking Centre NPS) and formal agreement of the Official Services of the Member countries it willbe published in its final v
5、ersion on yellow paper as an AECMA Standard. Nota - Extra copies can be supplied by B.N.A.E - 8, rue Moreau-Vauthier - 92100 BOULOGNE-BILLANCOURT Edition approved for publication Comments Should be sent within six months CI Chairman after the.date of publication decision 88, Bd. Malesherbes 22 April
6、 1986 A.E.C.M.A. Mr MOUTARDE 75008 PARIS - FRANCE 4 AECMA PREN2790 86 LOL2311 0004l83 T F- prEN2790 Page 3 I This standard specifies the characteristics of adjustable rod-ends consisting of : - a self aligning ball bearing with self-lubricating liner, EN2501 - a rod-end with threaded shank consistin
7、g of : - a circumferential groove to identify location, - an optional longitudinal groove for locking purposes. Scope and field of application These rod-ends are intended for use with flying control rods or rods for aerospace structures. They shall be used within the temperature range from - 55 to +
8、 150 OC. 2 References IS0 1 132-1 980 , Bearings - Tolerances - Definitions IS0 3353-1 976 , Aerospace construction - Rolled threads - Runout and lead threads IS0 5855/1-I 981 , Aerospace construction - MJ Threads - Part 1 : Basic profile IS0 5855/2-1981 , Aerospace construction - MJ Threads - Part
9、2 : Dimensions for nuts and bolts EN2064 , Bearings, spherical plain in corrosion resisting steel with self-lubricating liners- EN2068 , Aerospace series - Rod-ends with self-lubricating, self aligning bearings - Technical EN21 33 , Cadmium plating of steels with maximum specified tensile strength e
10、qual to or less EN21 37 , Steel FE-PL75-11 O0 MPa Rm 1250 MPa - Bars De 1 O0 mm -Aerospace series EN2475 Steel FE-PL74-1100MPaRm1300MPa-BarsDe 100mm-Aerospaceseries EN2476 , Steel FE-PL74-11 O0 MPa Rm G 1300 MPa - Forgings De G 1 O0 mm - Aerospace EN2501 , Bearings, spherical plain in corrosion resi
11、sting steel with self-lubrificating liners and . Technical specification - Aerospace series specification 1 ) than 1450 MPa, and copper and copper alloys - Aerospace series series wide inner ring - Dimensions and loads - Aerospace series 3 Symbols and definitions The tolerance symbols and their defi
12、nitions are in accordance with IS0 1 132. Adc = deviation of a single bore diameter idmp = single plane mean bore diameter deviation (Y C25 = maximum angle of tilt of the outer ring with repect to the inner ring, with the spherical raceway of the outer ring being completely in contact with the inner
13、 ring = permissible dynamic radial load by 25 O00 cycles for definition see EN2064) 4 Materials Rod-end body : Steel EN21 37 or EN2475 or EN2476 - Hardness 33 HRC 39. Plain bearing : See EN2501. I) ln preparation - prEN2790 Page 4 AECMA PREN2770 b m LOL23LL 0004LB4 L m 5 Surface treatment Rod-end :
14、Cadmium plating EN21 33,7 to 20pm except threads 5 to 1 Opm, chromate passivation optional. 6 Required characteristics 6.1 Dimensions - Tolerances - Masses The configuration shall correspond with the figure. The dimensions and the tolerances shall conform with the values indicated in the figure and
15、table 1 and 2; these values apply after cadmium plating. 6.2 Surface roughness See figure, values prior to cadmium plating. 6.3 Loads and rotational starting torques See table 2. I F 21 Section A-A - Incomplete threads according to IS0 3353 G 23 Break sharp corner d of base of groove = d3 min. (see
16、IS0 5855/2) Dtail X Dtail Y Figure Note : The circumferential indication groove and the longitudinal groove over the distance F shall be painted red. AECMA PREN2790 86 W 10123LL 0004LeS 3 W prEN2790 Page 5 Table I Dimensions in millimetres d A E Thread 1) F 2) G 3) 1 M N S Mass 3-02 fO.1 designation
17、 +0,5 +o, 1 O = h0.5 min. Nominal Ode diameter O O -1 ,o o -0.1 9 06 6 22,5 8,2 MJ 10 X 1,25 - 4h6h 23 37 54 8,O 46 08 8 - 26,O 10,2 MJ 12 X 1,25-4h6h 27 42 62 102 76 10 4) 10 32.0 13,2 MJ 14X 1,5 -4h6h 31 48 13 3,2 12,2 1,0 135 2.4 0,8 1) Thread = IS0 5855; parts 1 and 2 rolled. 2) F 3) . G 4) This
18、 rod-end is interchangeable with its equivalent of EN2498. = minimum length of engaged threads : includes thickness of lock washers and height of nut. = minimum length of useful threads. After swaging on rod-end Starting Ultimate static Axial push out load torque load KN 3) load c25 KN KN 1) Permiss
19、ible lynamic radial N.m 16,6 4.5 0,45 to 1,3 27 252 65 39 38,6 2) 10.5 58 0.7 to 2,O Table 2 Dimensions in millimetres Spherical plain bearings with self lubricating liner EN2501 (Reference only) d Tolerances B C D 4) O -0,06 Pm Nom. Admp Ads 14 8 18 6 o i-2 -8 -10 15 10 21 8 20 13 26 10 d r a! min.
20、 in degrei 9.0 9 0,3 11.0 to 8 08 13.5 10 1) In direction of the axis of the rod-end fitting. 2) This load is a maximum of 2/3 ultimate static load of the rod-end and not the load from EN2501. 3) Ultimate loads are listed because failure will occur in the rod-end and not the bearing. Users shall app
21、ly their own factors to obtain the permissible static load. 4) The relevant fit to be at manufacturers opfion. prEN2790 Page 6 7 Designation Each adjustable rod-end shall only be designated as in the following example : Description block ROD-END Identity block L = code for left hand thread Number of
22、 EN standard . 06 = code for d, see table 1 K= code for type with longitudinal groove t Where the following codes are applied : L = left hand thread R = right hand thread K = with longitudinal groove T = without longitudinal groove Note : if necessary, the originator code S 9005 may be introduced be
23、tween the description block and identity block. . 8 Marking In addition to the manufacturers own marking, each rod-end and its package shall be marked using the identity block specified in clause 7 of this standard. The position and method of marking are at the manufacturers option, it shall not have any detrimental effect on the rod-end. 9 Technical specification Rod-ends supplied to this standard shall conform with the requirements of EN2068 1).
