1、STD-AECMA PREN 3729-ENGL 1999 W 1012311 001i801i1 452 W AECMA STANDARD NORME AECMA AECMA NORM prEN 3729 Edition P I February 1999 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES (AECMA) Gulledeiie 94 - B-1200 BRUXELLES - Tel. (+32) 2 775 81 1 O - Fax. (+32) 2 775 81 11 ICs: 49.030.30 D
2、escriptors: ENGLISH VERSION Aerospace series Rings, threaded, self-locking, left-hand th read, in heat resisting steel FE-PA92HT (A286), silver plated Srie arospatiale Luft- und Raumfahrt filetage gauche, Lin ksgewinde, argentes versilbert Bagues filetes, freinage interne, en acier rsistant chaud FE
3、-PA92HT (A286), Gewinderinge, selbstsichernd, aus hochwarmfestem Stahl FE-PABZHT (A286), This “Aerospace Series“ Prestandard has been drawn up under the responsibility of AECMA (The European Association of Aerospace Industries). It is published on green paper for the needs of AECMA-Members. It has b
4、een technically approved by the experts of the concerned Technical Committee following comment by the Member countries. Subsequent to the publication of this Prestandard, the technical content shall not be changed to an extent that interchangeability is affected, physically or functionally, without
5、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 Standardization) for formal vote. Nota
6、 - Extra copies can be supplied by B.N.A.E. - Technopolis 54 - 199, rue Jean-Jaques Rousseau - 92138 ISSY-LES-MOULINEAUX CEDEX Comments should be sent within six months aiter the date of publication to Edition approved for publication 1999-02-26 AECMA Gulledeiie 94 l 6-1200 BRUXELLES I C8 Chairman M
7、r Feltham aecma 1999 - STDoAECMA PREN 3729-ENGL 1999 10L2311 OOLbO12 399 Page 3 prEN 3729: 1999 I Scope This standard specifies the characteristics of threaded, self-locking rings, with left-hand threads, in FE-PA92HT, silver plated, chiefly used for axial location of bearing outer rings. Maximum te
8、st temperature of the parts: 450 “C NOTE These parts are designed to be used with 4H6H internal threads. 2 Normative references IS0 5855-1 Aerospace - MJ threads - Part 1: General requirements EN 2171 Heat resisting steel FE-PA92-HT - R, 2 900 MPa - Bars - Aerospace series 1) EN 2424 Aerospace serie
9、s - Marking of aerospace products EN 2786 Aerospace series - Electrolytic silver plating of fasteners 2) EN 3299 Aerospace series - Shaft-nuts and threaded rings, self locking, right- or left-hand MJ threads, in heat resisting steel FE-PA2601 (A286) - Technical specification 2) 3 Required characteri
10、stics 3.1 See figure 1 and table 1. Dimensions and tolerances are in millimetres. They apply after silver plating. Configuration - Dimensions - Tolerances - Masses 3.2 Material EN 2171 3.3 Surface treatment EN 2786, 5 pm min. shall be measured at the pitch diameter of threads and 5 pm to 15 pm for o
11、ther surfaces. 1) Published as AECMA Standard at the date of publication of this standard 2) Published as AECMA Prestandard at the date of publication of this standard Previous page is blank STD-AECMA PREN 3729-ENGL 1999 m LOL232L 00Lb013 225 II Page 4 prEN 3729: 1999 Remove sharp edges O, 1 to 0,4.
12、 I R 0.5 to 0.7 A Y (8:Il Key 1 2 3 Marking 4 Thread 5 Pitch diameter 6 N x equally spaced scallops Chamfer at the manufadurers discretion Slot to indicate left-hand thread LAI 5 W (5:l) Details of form not stated and self-locking feature are left to the manufacturers discretion. Figure 1 STD.AECMAP
13、REN 3729-ENGL L999 LOL23LL 00Lb014 ZbL 9 Page 5 prEN 3729: 1999 Pb S max. f 0,2 Mass kgil O01 parts Y - 018 O19 MJ18xl&Ig6g-s 13 6 MJS191,5-4g6g-LH 14 020 021 022 023 024 025 MJ201,5-4g6g-LH 7 15 MJ221,5-4g6g-LH 16 MJS211,5-4g6g-LH 8 MJS231,5-4g6g-LH 17 MJ241,5-46g-LH 18 9 MJ251,5-46g-LH 19 026 MJ26
14、1,5-4g6g-LH 20 Table 1 JEIF Left-hand thread a H JIKIM O :ode I Designation I i 0,2 I - 0,2 + 0,2 - 0,l t0,l 1 +0,2 1 +0,1 7 18,8 I 1,7 I 7 13 I 17 I 19,8 20,8 21,8 22,8 23,8 24,8 25,8 26,8 27,8 28,8 29,8 30,8 15 I 20 I 23 705 3,7 027 MJ271,5-4g6g-LH 028 MJ281,5-4g6g-LH 029 030 - 031 MJS31x1,5-4g6g-
15、LH I 24 12 9 032 033 - I 034 MJS341,5-4g6g-LH I 27 26 I 32 I 035 036 - 27 1 33 I 4 8 2 36,8 28 34 29 I 35 I E- 32 33 32 I 38 I a In conformity with IS0 5855-1 in none self-locking zone Maximum diameter of outer envelope circle after realizing self-locking feature STD*AECflA PREN 3729-ENGL 1999 LOL2311 OOLbOL5 OTB H Page 6 prEN 3729: 1999 4 Designation EXAMPLE: NOTE If necessary, the code 19005 shall be placed between the description block and the identity block. 5 Marking EN 2424, style A, as indicated on the figure 1. 6 Tech nical specification EN 3299
