1、prEN 4493 -STD-AECMA PREN 4493-ENGL 2000 W LOL2311 OOL7871 7bT W AECMA STANDARD Edition approved for publication 2000-02-29 NORME AECMA AECMA NORM Comments should be sent within six months C8 Chairman after the date of publication to AECMA Gulledelle 94 Mr Feltham 8-1200 BRUXELLES Edition P 1 Februa
2、ry 2000 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES (AECMA) Gulledelle 94 - B-I 200 BRUXELLES - Tel. (+32) 2 775 81 1 O - Fax. (+32) 2 775 81 11 ICs: 49.030.10 Descriptors: aircraft industry, screw thread, self-locking screw thread, nickel alloy, heat resistant material, characteri
3、stic, surface treatment, dimension, designation, marking ENGLISH VERSION Aerospace series Inserts, screw thread, helical coil, self-locking, in heat resisting nickel base alloy NI-PHI801 (NI-P96HT, Nimonic go), si Ive r plated Srie arospatiale Luft- und Raumfahrt Filets rapports, freinage interne, e
4、n alliage rsistant chaud base de nickel NI-PHI801 (NI-P96HT, Nimonic go), Draht-Gewindeeinstze, selbstsichernd, aus hochwarmfester Nickelbasiciegierung NI-PHI801 (NI-P96HT, Nimonic go), argents versilbert This “Aerospace Series“ Prestandard has been drawn up under the responsibility of AECMA (The Eu
5、ropean Association of Aerospace Industries). It is published on green paper for the needs of AECMA- Members. It has been technically approved by the experts of the concerned Technical Committee following comment by the Member countries, Subsequent to the publication of this Prestandard, the technica
6、l content shall not be changed to an extent that in terchangeability is 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 Oficial Services of the Member countries it
7、 will be submitted as a draft European Standard to CEN (European Committee for Standardization) for formal vote. Nota -Extra copies can be supplied by B.N.A.E. - Technopolis 54 - 199, rue Jean-Jacques Rousseau - 92138 ISSY-LES-MOULINEAUX CEDEX STDDAECMA PREN qq73-ENGL 2000 D 1012311 0017872 8Tb Page
8、 3 prEN 4493: 2000 O Introduction For design and assembly procedures see EN 3044 and EN 2945. 1 Scope This standard specifies the characteristics of self-locking, helical coil, screw thread inserts in NI-PHI801 (NI-P96HT), silver plated, for aerospace applications. Maximum test temperature: 550 “C 2
9、 Normative references IS0 5855-2 Aerospace - MJ threads - Part 2: Limit dimensions for bolts and nuts EN 2400 Aerospace series - Heat resisting nickel base alloy NI-PHI 801 (NI-P96-HT, Nimonic go), cold drawn and precipitation treated wires - D I 10 mm 1) EN 2424 Aerospace series - Marking of aerosp
10、ace products EN 2786 Aerospace series - Electrolytic silver plating of fasteners 2) EN 2943 Aerospace series - Inserts, screw thread, helical coil, self-locking - Technical specification EN 2945 Aerospace series - Inserts, screw thread, helical coil, self-locking - Assembly procedure EN 3044 Aerospa
11、ce series - Installation holes and procedures for inserts, screw thread, helical coil, self-locking - Design standard 3 Required characteristics 3.1 See figure 1 and tables 1 and 2. Dimensions and tolerances are in millimetres. They apply after silver plating. Configuration - Dimensions - Tolerances
12、 - Masses 3.2 Material EN 2400 3.3 Surface treatment EN 2786 Thickness: 2 pm to 5 pm 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 STD-AECMA PREN 4q73-ENGL 2000 LO323LL 0037873 732 M Page 4 prE
13、N 4493: 2000 Raqv RaOq J Values apply before silver plating Form out-of-round in this area to achieve the self-locking requirements (tool marks perrnissiblel. L Tang r- Number of coils M, M Ins talla tion z l Emax. I See detail W I RI min. tangential to flanks -/ W K-K tg Details of form not stated
14、are left to the manufacturers discretion. a except in the case of inserts of diameters 4, 5 and 6 and a nominal length of 1,25 D where the plain coil may be omitted. Locking feature shall be in the zone Y max. - X min. It shall take place on at least two coils separated by a plain coil, The number o
15、f coils is counted from the notch. Length of fitted insert to notch. The notch shall be on the upper face of the first coil behind the tangent point of the tang radius. The nominal length L is a reference. It is equal to the basic length of the thread insert. Dimensions after coiling, corresponding
16、to an insert fitted in an installation hole to EN 3044. Section K-K is perpendicular to the helical axis. Figure 1 STD-AECi1A PREN 4493-ENGL 2000 LOL231l 0017894 679 Diameter code 040 050 Page 5 prEN 4493: 2000 A 8 C E F H Thread a (Associated bolt) + 0,55 MJ4x0,7 0,163 5,05 0,758 0,683 0,612 0.51 0
17、,351 0,455 0,4445 MJ5x0,8 0,209 6,25 0,866 0,775 0,7 0,598 0,4 0,52 0,5085 min. O max. min. max. min. . max. min. Table I 060 070 080 100 MJ6x I 7,4 MJ7x 1 0,267 8,65 1,083 0,975 0,875 0,748 0,5 0,65 0,637 MJ8x 1 9-7 MJIO x 1,25 0,415 12,l 1,353 1,251 1,094 0,967 0,625 0,812 0,799 Diameter code 040
18、050 060 070 080 100 J P Ri S U V AA max. min. max. min. min. min. max. min. max. max. min. 5,6 4,9 335 2,5 0,126 0,219 1,67 1,02 0,45 0,34 0,31 6,8 6,l 4,535 3,15 1,144 0,25 2,09 1,41 0,37 0,34 7,95 7,25 4,85 3,7 2,55 1,65 9,2 8,4 53 4,3 0,18 0,312 3,l 2,09 0,5 0,45 O ,6 10 9,2 6,5 4,75 3,88 2,27 0,
19、75 12,3 11,5 8 53 O ,226 0,391 4,77 2,86 0,6 0,55 I L nom. 1,25D 1,50 20 5 6 8 L1 Xb + 0,25 O min. 1,25D 1,5D 20 1,25D 1,5D 20 4,47 547 7,47 1,5 15 1,6 MJ6 x I 73 9 12 6,75 8,25 11,25 2,3 2,3 2,5 MJ7 x I 8,8 10,5 14 8 9,75 13,251 2,5 2,5 3 MJ8 x I 10 12 16 9,25 11,25 15,25 3 3 4 MJIO x 1,25 12,5 15
20、20 11,56 14,06 19,06 33 33 4-7 Diameter code 040 Thread a (Associated bolt) MJ4x0,7 Diameter code 040 Yb Q Mass N Number of coils 1,25 D 1,5 D 20 1,25D 1,5D 20 1,25D 1,5 D 20 3 3,7 5,7 4,9 6,1 8,6 0,19 0,23 0,31 kgll 000 pieces it 0,25 max. 050 060 070 080 1 O0 33 42 63 53 69 9,6 0,34 0,42 0,55 45 5
21、3 83 54 6,8 93 0,61 0,75 0,99 53 63 10 63 8 11,l 0,84 1 ,O3 1,36 7 7 11 7-5 9,4 13 1,12 1,38 1,8 9 9 14 7,6 95 13,l 2,19 2,68 3,52 a In accordance with IS0 5855-2 b X and Y dimensions apply after installation of the thread insert. - STD-AECMA PREN 4Y73-ENGL ZOOU E ItU323LL 0037895 505 W Paqe 6 pr 44
22、93: 2000 4 Designation EXAMPLE: Description block Identity block Thread insert EN4493-0700 Number of this standard Diameter code (see table 1) Length L (in millimetres multiplied by 10, see table 2) i8 - NOTE If necessary, the code 19005 shall be placed between the description block and the identity block. 5 Marking EN 2424 - styleG; - additionally style F permitted, as indicated on figure 1. 6 Technical specification EN 2943
