1、94 90 3404589 0035026 9 W 1990-10-31 A,E.C.M.A. STANDARD NORME A.E.C.M.A. A.E.C.M.A. NORM c- A.E.C.M,A. Mi. WILLIAMS 88, Ed. Malesherbes 75008 PARIS + FRANCE prEN 2944 Issue P 1 October 1990 EDITE PAR LASSOCIATION EUROPEENNE DES CONSTRUCTEURS DE MATRIEL AEROSPATIAL 88, boulevard Malesherbes, 75008 P
2、ARIS -TEL. 45-63-82-85 ENGLISH VERSION Aerospace series Insert, screw thread, helical coil8 self-locking, in corrosion resisting alloy unplated (Zl OCNl8-O9 - EN 2947“), Srie arospatiale Luft- und Raumfahrt Filets rapports, freinage interne, en alliage inoxydable rsistant la corrosion Draht-Gewindee
3、instze, selbstsichernd, korrosions bestandige Legierung (21 OCN18-O9 - EN 2947*), (Z1 OCN18-O9 - EN 2947*), sans revtement blank This .Aerospace Seriesu pre-standard has been drawn up under the responsibility of AECMA (Association Europenne des Constructeurs de Matriel Arospatial). It is published o
4、n green paper for the needs of AECMA-Members. It has been technically approved by the experts of the concerned Commission following comment by the Member countries. Subsequent to the publication of this pre-standard, the technical content shall not be changed tu an extent that interchangeability is
5、affected physically or functionally, without 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 willbe submitted as a draft European Standard to CEN (European Committ
6、ee for Standardiretion) for final vote. It will be replaced by the complete designation when available Nota - Extra copies can be supplied by B.N.A.E. - 8, rue Moreau-Uauthier - 92100 BOULOGNE-BILLANCOURT Edition approved for publication Comments should be sent within six months C8 Chairman I after
7、the date of publication decision I CEN PRENx2944 90 I 3404589 0035027 O W prEN 2944 This draft standard is based in international discussions in which the K has taken an active part. further participation by the K in this work and in the preparation of the consequent British Standard. Technical comm
8、ents on this draft will assist Cross References International Standard IC0 5855-1 IS0 5855-2 EN 2424 EN 2943 EN 2945 EN 2947 EN 3044 tich Standard CorresDondinE Bri I BS 6293/1 E BS 6293/2 none none none none none 2 90/81647 _. I CEN PRENk2744 70 m 3404587 0035028 2 m prEN 2944 Page 3 1 Scope and fi
9、eld of application This standard specifies the characteristics of self-locking thread inserts in ZlOCNi8-09, unplated, for aeronautical applications, Maximum test temperature : 350 OC, 2 References IS0 5855-1, IS0 5855-2, Aerospace - MJ Threads - Part 1 : General requirements Aerospace - MJ Threads
10、- Part 2 t Limit dimensions for bolts and nuts Aerospace series - Identification marking of standard fasteners 1) Aerospace series - Wire thread inserts, prevailing torque (self-locking) - Technical specification 2) Aerospace series - Assembly with self-locking thread inserts 2) Aerospace series - C
11、orrosion resisting alloy (ZIOCNl8-09) - Wire 3) Aerospace series - Installation of self-locking thread inserts - Design dimensions 2). EN 2424, EN 2943, EN 2945, EN 2947, EN 3044, 3 Materials, surface treatments, material identification 3.1 Material Corrosion resisting alloy EN 2947. 3.2 Surface tre
12、atment None, 3.3 Material identification Colour : blue. u 1) Published as AEGMA standard at the the dimensions and tolerances shall be in accordance with the values shown on figure 1 and in tables 1 and 2. 4.2 Surface roughness r See figure 1: 4.3 Thread In accordance with tables 1 and 2. 5 Installa
13、tion of self-locking thread inserts See EN 3044. 6 Assembly with self-locking thread inserts See EN 2945. -4- 7 CEN PREN*E!944 90 3404589 OOL5030 O -1 . prEN 2944 Page 5 measured at 30 itom th6 tang locking rhoractcrirtics 1) dimcnrlonr for use of design officer . II D nomlnol dla.o bolt -7-l- 4 O 0
14、9i O detall f 4) - view on u I Y Figure i) Locking shall be in the zone defined in 6) ft shall take -place on at leset 2 locking coils separated by an uncompressed Coile We remaining forfi characteristics are the choice of the manufacturer and shall be fixed when the thread inserts are qualified. 2)
15、 The number of un-engaged cails is counted from the notch. 3) Length of fitted insert to notch. 4) The notch shall be on the upper face of the first Coil behind the blend point of the tang radius. 5) The nominal length L is a reference. It is equal to the basic length of thread insert. 6) Y ma. - X
16、min. - zone in which locking system may be achieved. 7) Dimensions after wrapping* corresponding to an insert fitted in a thread hole as per EN 3044. -,p 9 I 8) Section K is perpendicular to the insert wrapping angle. d -. ! k -5- - CEN PREN*Z944 90 m 3404589 OOl1503lIa prEN 2944 Page 6 Table 1 - Di
17、mensions Dimensions in millimetres Table 2 - Lengths - Number of coils and weights Dimensions in millimetres (1) In accordance with IS0 5855-1 and 5855-2. (2) X and Y dimensions are after fitment of the inckrt. ,- - , II -6- . 7 Designation Number of EN standard 3- Code of nominal diameter D Example
18、 : Description block Identity block Note : If necessary, the originator code I9005 shall be placed between the description block and the identity block. 8 Marking EN 2424, style F. Marking optional. At the position shown on figure 1. Permanent marking, process to be chosen by the manufacturer, but must not impair the characteristics of the thread insert, 9 Technical specificaticn The self-locking thread inserts supplied in accordance with this standard shall conform to the requirements of EN 2943. t -3 - - j
