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    ASD-STAN PREN 4078-1995 Aerospace Series Inserts Threaded Thin Wall Locked and Self-Locking in Heat Resisting Steel MoS2 Lubricated Classification 1 100 MPa (at Ambient Temperatur.pdf

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    ASD-STAN PREN 4078-1995 Aerospace Series Inserts Threaded Thin Wall Locked and Self-Locking in Heat Resisting Steel MoS2 Lubricated Classification 1 100 MPa (at Ambient Temperatur.pdf

    1、AECMA PREN*4078 95 W lOL23LL 0009BbL O09 I Edition approved for publication AECMA STANDARD NORME AECMA AECMA NORM C3 Chairman Comments should be sent within six months after the date of publication to prEN 4078 Edition P 1 October 1995 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES (A

    2、ECMA) Gulledelle 94 - B-1200 BRUXELLES - Tel. (32) 2 775 81 10 - Fax. (32) 2 775 81 11 ICs : 49.040.20 ENGLISH VERSION Aerospace series Inserts, threaded, thin wall, locked and self-locking, in heat resisting steel, Mos2 lubricated Classification : 1 100 MPa (at ambient temperature) / 315 OC Srie ar

    3、ospatiale Douilles filetes, paroi mince, freines et freinage interne, en acier rsistant chaud, lubrifies Mos2 Classification : 1 100 MPa ( temprature ambiante) 1315 OC Luft- und Raumfahrt Gewindeeinsatz, dnnwandig, gesichert und schraubensichernd, aus hochwarmfestem Stahl, Mosp-geschmiert Klasse : 1

    4、 100 MPa (bei Raumtemperatur) I 31 5 OC 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 been technically approved by the experts of the co

    5、ncerned 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, ph ysically or functionally, without re-identification of the standard. After examina

    6、tion 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. 1995-1 0-31 AECMA Gulledelle 94 I B-1200 BRUXELLES I

    7、 I Mr Arena 0 aecma 199 AECMA PREN*4078 95 LOL23Ll O009863 981 Page 3 prEN 4078 : 1995 1 Scope This standard specifies the characteristics of threaded thin wall inserts, locked and with a self-locking feature achieved by deforming out-of-round the internal thread of mid length, in heat resisting ste

    8、el, Mos2 lubricated. Classification : 1 100 MPa 1 / 315 OC 2, 2 Normative references IS0 965-1 IS0 5855-2 EN 2424 EN 2491 EN 4217 EN 4218 TR 3198 TR 3791 IS0 general purpose metric screw threads - Tolerances - Part 1 : Principles and basic data Aerospace - MJ threads - Part 2.: Limit dimensions for

    9、bolts and nuts Aerospace series - Marking of aerospace products Aerospace series - Molybdenum disulphide dry lubricants - Coating methods 3, Aerospace seriek - Inserts, thin wall, for airframe applications - Installation and removal procedure 3, Aerospace series - Inserts, thin wall, self-locking, M

    10、J threads, in heat resisting steel, Mos2 lubricated - Classification 1 100 MPa (at ambient temperature) / 315 OC - Technical specification 3, Aerospace series - Manufacturers identification monograms and marks for EN aerospace products 4, Aerospace series - Materials for all metal self-locking nuts

    11、and thin wall inserts of temperature classes 4 425 OC 4, 1) Corresponds to the minimum tensile stress which the insert is able to withstand at ambient temperature without breaking or cracking when tested with a bolt of a higher strength class. 2) Maximum temperature that the insert is able to withst

    12、and, without permanent alteration to its original characterisitcs, after ambient temperature has been restored. The maximum temperature is conditioned by the Mos2 lubricant. 3) In preparation at the date of publication of this standard 4) Published as AECMA Technical Report at the date of publicatio

    13、n of this standard AECMA PREN*4078 95 10L23Ll 0007864 818 Page 4 prEN 4078 : 1995 3 Required characteristics 3.1 See figure 1 and table 1. Dimensions and tolerances are expressed in millimetres and apply before Mos2 lubrication. Details of form not stated are at the manufacturers option. Configurati

    14、on - Dimensions - Masses 3.2 Materials TR 3791 3.3 Surface treatment EN 2491, thickness not specified AECMA PREN*4078 95 .I L0123LL 0009865 754 I Page 5 prEN 4078 : 1995 Grooves for identification to be of V-section 0,l to 0,2 deep, spaced 1,O apart positioned on Face X (see TR 3198). Knurl across t

    15、hread to produce L serrations. 1) These values in micrometres apply before surface treatment. They do not apply to threads and sheared edges the surface texture of which will be as achieved by usual manufacturing methods. Figure 1 Table 1 1 ) In accordance with IS0 5855-2. In self-locking zone the t

    16、olerances apply before deforming out-of-round. 2) In accordance with IS0 965-1, except for the maximum minor diameter which shall be as stated in table 1. 3) Approximate values (kg/l O00 pieces), calculated on the basis of 7,85 kg/dm3, for information purposes only AECMA PRENx4078 95 I 101231L 00098

    17、66 690 - Page 6 prEN 4078 : 1995 4 Designation EXAMPLE : Description block Identity block INSERT EN4r78A060 Number of this standard Configuration (see table 1 I Diameter code (see table 1) NOTE : If necessary, the code 19005 shall be placed between the description block and the identity block. 5 Marking EN 2424, style G 6 Installation EN 4217 7 Technical specification EN 4218


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