1、STD-AECMA PREN 2702-ENGL 1778 I LOL233L 0035078 37q Declassification approved AECMA STANDARD NORME AECMA AECMA NORM Comments should be sent within six months after the date of publication to C4 Chairman prEN 2902 Edition P 2 September 1998 ICs: Descriptors: PUBLISHED BY THE EUROPEAN ASSOCIATION OF A
2、EROSPACE INDUSTRIES (AECMA) Gulledelle 94 - 8-1200 BRUXELLES - Tel. (i-32) 2 775 81 10 - Fax. (+32) 2 775 81 11 Srie arospatiale Colliers en for EN 2900 EN 2905 -Aerospace series - Rubber cushionings for clamps - Dimensions - dimensions d ineiis ion s 0,4 a 6 mm 3) alumiriiuni and aluminium alloys 1
3、) -Aerospace series - Clamps - Technical specification 21 Masses 2) 3 Required characteristics 3.1 hliaterials Clamp : aluminium alloy EN 2091 Rubber cushioning see EN 2905 3.2 Surface treatment Ctiromating : EN 2437 3.3 Configuration - Dimensioris - Tolerances The configuration shall correspond wit
4、h the figures. imetisions shall correspond with the figure and table. i) In preparation 2) Published as AECMA pre-standard 3) Published as AECMA standard Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or
5、 networking permitted without license from IHS-,-,-Issue P 1 prEN 2902 Page 4 X Possible forms of cushionings with aiternative wedge see EN 2905 ( At manufacturers option ) Figure 1 - Configuration loop clamp with rubber cushioning Edges to be rounded :ation Figure 2 - Configuration loop clamp repre
6、sented without rubber cushioning 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-,-,-DN 4 5 6 8 10 12 14 15 16 18 20 22 25 28 32 36 38 40 - - B M A - +0,25
7、 12,7 15,5 - 16,4 15,6 16,3 17,1 F 3 to1 er- ance +0,4 -0 +0,8 -0 Table 1 - K - M 12 12,5 - 13 14 15 - - 16 19 - 19,s 20 - 21 22 23 24,s 26,s 28,s 30,5 - - - - - - 31,5 32,5 - - - Dimensions - R max. - 2 35 3 93 4,o S oler- ance - +0,03 Untoleranced dimensions : 2 0,4 1) Data referring to the elosto
8、mer specific mass of 1,2 g/cm2 Issue P 1 prEE! 2902 Page 5 Dimensions in millimetres EN 2905 i Mass 1) kg/1000 pcc cushioning type without wedge 2 wedged 2K 21 31 Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reprod
9、uction or networking permitted without license from IHS-,-,-Description block Identity block W = Code letter only for wedged cushionings, wtier required- I- Number of EN standard C = Code letter for cushioning material (see EN 2905) 20 = Rominal iameter Note : if necessary the originator code 19005
10、may be introduced between the description block and the identity block. 5 Marking In addition to the manufacturers own marking each clamp sliall be marked in the position indicated using the identity block as defined in clause 4 of this standard. Marking method is at the manufacturers option. 6 Technical specification As per Et4 2900. 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-,-,-
