1、- A.E.C.M.A. STANDARD NORME A.E.C.M.A. A. E.C.M.A. NORM DRAFT prEN2492 Edition 1 December 1980 ENGLISH VERSION ROD-ENDS, SELF-ALIGNING BALL BEARING WITH THREADED SHANK DIMENSIONS AND LOADS AEROSPACE SERIES EMBOUTS A ROTULE SUR BILLES LUFT-UND RAUMFAHRT A TIGE FILETEE SENKPFE MIT PENDELKUGELLAGER DIM
2、ENSIONS ET CHARGES UND GEWI NDESCHAFT SERIE AEROSPATIALE ABMESSUNGEN UND BEANSPRUCHUNGEN The text of this standard, which exists in three equivalent versions (English, French, German) has been drawn up under the responsibility of AECMA (Association Europenne des Constructeurs de Matriel Arospatial)
3、and has been circulated to Official Services. Any reservations expressed by Official Services and not resolved in this issue, have been incorporated in the history sheet which has accompanied this prEN to CEN. It is published on yellow paper as a draft European Standard intended to receive, under th
4、e same presentation and according to its own rules, the approval of CEN (European Committee for Standardization). Approved by The equivalent versions in French and German languages I COMITE DE NORMALISATION can be supplied by B.N.A.E., 8, rue Moreau-Vauthier 92100 BOULOGNE-BILLANCOURT - FRANCE. of A
5、.E.C.M.A. 1980-02-27 I AECMA PREN2992 80 W l10123LlI 000333b Lt 1 2 3 4 5 6 7 8 9 10 11 CONTENTS SCOPE AND FIELD OF APPLICATION RE FE RE NCE S DEFINITION SYMBOLS MAT E RI AL S PROTECTION LUBRICATION REQUI RED CHARACTERISTICS DESIGNATION MARKING TECHNICAL SPECIFICATION prEN2492 Page 3 DRAFT EUROPEAN
6、STANOARD AEROSPACE SERIES prEN2492 ROD-ENDS, SELF-ALIGNING BALL BEARING IJITH THREADED SHANK DIMENSIONS AND LOADS SCOPE AND FIELD OF APPLICATION This standard specifies the characteristics of self-aligning ball bearing rod-ends with threaded shank, fitted with shields or seals. They are intended for
7、 use on flying control rods or airframe structure rods. They shall be used within the temperature range - 54 to + 121 OC (grease Code A) or - 54 to + 177 “C (grease Code BI. RE FE RENCES IS0 3353 - 1976, Aerospace construction - Rolled threads - Runout and lead threads EN2031, Steel FE-PL31 - harden
8、ed and temered - Bars EN2067, Self aligning ball Searing pod ends - Technical Specification 1) EN2133, Cadmium plating of steels wLth maximum specified tensile strength equal to or less tkn 1453 ?Pa and copper and copDer alloys EN2135, Steel FE-PL61 1) EN2158-1, YJ threads - Tart 1 - Basic rrofie EX
9、2C58-2, MJ threads - ?E:*: 2 - Selection of Rominal diameters-pitches- EV2158-3, $3 threads - Parr 3 - Tclerances and limiting dimensions tolerances DEFIN ITION Xd-ends with double FON self-aliG.ing ball bearings ,the shank of which incor-porates a circumferential safe graove and may coritain a long
10、itudinal groa17e for a locking device. - O 1) In preparation. t AECMA PREN2972 80 1012311 0003338 8 I. _I-_ _ prEN2492 Page 4 4 SYIBOLS Ads the deviation of a single bore diameter Admp = single plane mean bore diameter deviation = angle of self-alignment CS = permissible static radial load Fa max =
11、permissible static axial load Ys = coefficient of axial load 5 MATERIALS Rod-ends - steel EN2135 i) Inner ring - steel EN2031 Balls - steel EN2031 Shields -corrosion resisting material. Seals - Polytetrafluoroethylene (P.T.F.E.) or polytetrafluoroethylene (P.T.F.E. ) - glass fibre reinforced. 6 PROT
12、ECTION Cadmium plating (chromatation optional) - See EN2133, on all external surfaces except the inner ring. Thickness of plating : 7 to 20 pm on the body 5 to 10 pm on the thread 7 LUBRICATION Extreme pressure ester grease (-73 to $121 OC Code A) or general purpose synthetic hydrocarbon type extrem
13、e pressure grease (-54 to +177 OC Code BI, see EN2067 1). 1) In preparation. prEN2492 Page 5 - I- 8 REQUIRED CHARACTERISTICS 8.1 Dimensions y Tolerances y Mass - 4 P = diameter d3 min (See EN2158-3) _ v V 1 d. v, I Configuration shall correspond with figure 1, 2 and 3. Dinensions shall correspond wi
14、th table 1 and 2. These valiies apply after cadm:uz plating. Self-aligning ball bearing rod ends can be assembled with either seals or shields r-l D I II with seals -code FIGURE 1 FIGURE 2 FIGURE 3 Detail Z *q Break sharp corner Optional longitudinal groove Section A-A Detail X Note : the indication
15、 groove and the longitudinal groove over the distance F shall be painted red. AECMA PREN2492 80 10L23LL 0003340 b a Dimensions in millimetres TABLE 1 d HEAD OF ROD-END SHANK OF ROD-END - F min * - 18 rolerances I D B O - 0,12 C + 0,l 8,5 O - - 10 r + 0,3 - 0,2 a in egrees S iomi- na1 - 1,4 LM kO,5 f
16、0,l O 48 1,6 54 - 62 73 52 - - 2,4 - A min Thread * designation nominal diameter Pl lfO.2 Code Idmp T 5 12 14 15 - - MJ 8X1,O -4h6h I 33 22 25 31 - - V MJ 1OX 1,25-4h6h I 37 22,5 28,5 32,O i- 2- - 10 - 6 8 O -8 8 -M.l 12X 1,25-4h6h I 42 10,2 12,2 - W Y 10 20 14 MJ 14X 1,5 -4h6h I 48 Thr.ead : rolled
17、 according to EN2158 Parts 1, 2 and 3. * F =minimum length of engaged threads ; includes thickness of lock and height of nut. TABLE 2 I I Mass 9 Radial internal clearance IlWX mm Rotational torque mN.m x Swivelling torque Permissible static Code radial load letter cs * N .m kN 1 35 2 60 5 85 7 130 0
18、,005 T 4,70 0,l 5 v 6,75 0,15 WI 8,90 I 0,20 Y I 14,OO I 0,20 cs Ys Fa max = - where Y, = 3,2. For definition of loads, see EN2067 1). i) In preparatlcr. a 9 d Ilr 10 11 io prEN2432 Fage 7 DES I GNAT I ON Each self-aligning ball bearing rod end shall only be designated as in the following example :
19、I De script ion block Identity block RO D - END I EN2492 G T P 1 A G = code letter for left hand thread T = code letter for Sore diameter d (see table 1) P = code letter for type with shields 1 = code nun-iber for type with longitudinal groove A code letter for ester type grease where the following
20、codes are applied G = left hand thread D = right hand thread P = with shields E - with seals 1 = with longitudinal groove 2 = without longitudinal groove A = ester type grease B = synthetic hydrocarbon type grease Note - if necessary, the originator code S9005 may be introduced between the descripti
21、on block and identity block. MARK1 NG In addition to the manufacturers own marking, each rod-end and its package shall be marked using the ideattry block specified in clause 3 of this standai-2. TE C HN I CAL S P E C I FI CAT I ON Rod ends supplied to this standard shall conform with the requirements of EN2067 I). 1) In preparation. Li
