1、AECMA PREN2358-01 77 = LO1231L 0002323 8 P Approved by COMITE DE NORMALISATION of A.E.C.M.A. 1977.06-24 A.E ,C .M .A. STAN DAR D NORME A.E.C.M.A. A.E.C.M.A. NORM The equivalent versions in be supplied by B.N.A.E., 8, rua Moreau-Vauthier 92100 BOULOGNE-BILLANCOURT - FRANCE. DRAFT prEN2158-1 Edition 1
2、 Januar/ 1979 ENGLISH VERSION MJ THREADS AEROSPACE SERIES PART 1 - BASIC PROFILE FILETAGES MJ PARTIE 1 - PROFIL DE BASE SER I E AERO SPAT I A LE MJ-GEWI NDE TEIL 1 - GRUNDPROFIL LU FT-UND RAUMFAHRT The text of this standad, which exists in three equivalent versions (English, French, German) has been
3、 drawn up under the responsability of A ECMA (Association Europenne des Constructeurs de Matriel Arospatial) 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
4、this prEN to CEN. It ispublished on yellow paper as a draft European Standard intended to receive, under the same presentation and according to its own rules, the approval of CEN (European Committee for Standardization). Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provi
5、ded by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AECMA PREN2L5-OL 77 = LOL23LL 0002322 T prEN2158-1 Page 2 FOREWORD This standard is part aerospace series, of EN2 defining metric threads, The complete series is made up as f0110WS :
6、 EN2158-1 - MJ threads - Part 1 - Basic profile EN2158-2 - MJ threads - Part 2 - Selection of nominal diame- ters - Pitches - Tolerances 111) EN2158-3 - MJ threads - Part 3 - Tolerances and limiting dimensions. The basic profile of the MJ thread differs from that of the IS0 metric thread (IS0 68) so
7、lely by the increase of the truncation on the minor diameter of the internal thread (0,3125 H instead of 0,2500 HI. This increase results from adoption of a maximum radius of 0,18042 pitch on the minor diameter d3 of the external thread (see EN2158-3). CONTENTS 1 SCOPE AND FIELD OF APPLICATION 2 REF
8、FXENCES 3 DEFINITIONS 4 BASIC PROFILE DIMENSIONS 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-,-,-prEN2158-1 Page 3 DRAFT EUROPEAN STANDARD AEROSPACE SE
9、RI ES prEN2158-1 MJ THREADS PART 1 - BASIC PROFILE 1 SCOPE AND FIELD OF APPLICATION This standard defines the basic profile for MJ threads. This profile is applicable to all components used in aerospace construction, should conform to ISO/R 1501. with the exception of threads with a nominal diameter
10、 of 1 and 1,2 mm which 2 REFERENCES ISO/R 1501 - 1970,-IS0 miniature screw threads EN2158-2, M3 threads - Part 2 - Selection of nominal diameters - Pitches - EN2158-3, Tolerances MJ threads - Part 3 - Tolerances and limiting dimensions 3 DEFINITIONS The basic profile (see figure i) is the theoretica
11、l profile corresponding to the basic thread dimensions (without tolerances) : major diameter, pitch diameter and minor diameter. Deviations are applied to the basic dimensions. v t v I 1 Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECM
12、ANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AECMA PREN215-O1 79 W 1012311 0002324 3 ppEN2158-1 Page 4 I C P U n a Thread axis - O FIGURE 1 - Basicprofile U O 3125 P D D, Dl d d, d, H : Height of basictriangle. P : Pitch. : Basic major diameter for internal thr
13、ead. : Basic pitch diameter for internal thread. : Basic minor diameter for internal thread. : Basic major diameter for external thread. : Basic pitch diameter for external thread. : Basic minor diameter for external thread. 4 BASIC PROFILE DIMENSIONS The basic profile dimensions are given in table
14、P 0,125P 0,04375 O ,05000 0,05625 0,06250 0,07500 0,08750 0,10000 0,12500 0,15625 Oll 8750 0,25000 TABLE 1 Dimensions in millimetres H 1 0,8660254038P 0,10938 O, 12500 0,14062 0,15625 0,18750 0,2 1875 0,25000 O ,3 1250 0,39062 0,46875 0,62500 0,3031 1 0,34641 0,38971 O ,4330 1 0,51962 0,60622 0,6928
15、2 0,86603 1,08253 1,29904 1,73205 0,125H 0,108258 O ,03789 0,04330 0,04871 0,05413 O ,06495 0,07578 0,08660 0,10825 0,13532 0,16238 0,21651 0,3125H 0,27063P 0,09472 0,10825 0,12178 Oll 3532 0,16238 O ,I 8944 0,21651 0,27063 0,33829 0,40595 O ,54 12 7 0,375H 0,32476P 0,11367 O, 12990 0,1461 4 0,16238
16、 O, 19486 0,22733 0,25981 0,32476 0,40595 0,48714 0,64952 0,5625H 0,487 14P 0,17050 0,19486 0,21921 0,24357 0,29228 0,34100 O ,3897 1 0,48714 0,60892 0,7307 1 0,97428 -. - I 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-,-,-
