1、ASD-STAN STANDARD NORME ASD-STAN ASD-STAN NORM prEN 3280 Edition P 2 June 2010 PUBLISHED BY THE AEROSPACE AND DEFENCE INDUSTRIES ASSOCIATION OF EUROPE - STANDARDIZATIONAvenue de Tervuren, 270 - B-1150 Brussels - Tel. + 32 2 775 8126 - Fax. + 32 2 775 8131 - www.asd-stan.orgICS: Supersedes amendment
2、A1 of May 2001 and will supersede EN 3280:1994 Descriptors: ENGLISH VERSION Aerospace series Bearings, airframe rolling, rigid or self-aligning Technical specification Srie arospatiale Roulements pour structure daronefs, rigides ou rotule Spcification technique Luft- und Raumfahrt Flugwerklager, Wlz
3、lager, Rillenkugellager oder Pendellager Technische Lieferbedingungen This “Aerospace Series“ Prestandard has been drawn up under the responsibility of ASD-STAN (The AeroSpace and Defence Industries Association of Europe - Standardization). It is published for the needs of the European Aerospace Ind
4、ustry. It has been technically approved by the experts of the concerned Domain following member comments. Subsequent to the publication of this Prestandard, the technical content shall not be changed to an extent that interchangeability is affected, physically or functionally, without re-identificat
5、ion of the standard. After examination and review by users and formal agreement of ASD-STAN, it will be submitted as a draft European Standard (prEN) to CEN (European Committee for Standardization) for formal vote and transformation to full European Standard (EN). The CEN national members have then
6、to implement the EN at national level by giving the EN the status of a national standard and by withdrawing any national standards conflicting with the EN. Edition approved for publication 30 June 2010 Comments should be sent within six months after the date of publication to ASD-STAN Mechanical Dom
7、ain Copyright 2010 by ASD-STAN prEN 3280:2010 (E) 2 Contents Page Foreword2 1 Scope 3 2 Normative references 3 3 Terms and definitions .4 4 Required characteristics, inspection and test methods6 5 Quality assurances8 6 Packaging.8 7 Certificate of conformity .9 Annex A (normative) Retention test for
8、 self-aligning bearing seals and shields 10 Annex B (normative) Sand and dust test. 12 Annex C (normative) Test on the running behaviour of the bearings, retention of seals and shields at the limit temperatures. 13 Annex D (normative) Verification of running accuracy 14 Annex E (normative) Verificat
9、ion of internal clearances . 17 Annex F (normative) Verification of permissible and ultimate static loads. 21 Annex G (normative) Lubricants Essential characteristics 25 Annex H (normative) Simplified qualification procedure. 26 Foreword This standard was reviewed by the Domain Technical Coordinator
10、 of ASD-STANs Mechanical Domain. After inquiries and votes carried out in accordance with the rules of ASD-STAN defined in ASD-STANs General Process Manual, this standard has received approval for Publication. prEN 3280:2010 (E) 3 1 Scope This standard specifies the required characteristics, inspect
11、ion and test methods, qualification and acceptance conditions for rigid or self-aligning airframe rolling bearings. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated refe
12、rences, the latest edition of the referenced document (including any amendments) applies. EN 2063, Aerospace series Airframe rolling bearings Technical specification EN 3045, Aerospace series Bearings, airframe rolling Rigid single row ball bearings in steel Diameter series 0 and 2 Reduced clearance
13、 category Dimensions and loads EN 3046, Aerospace series Bearings, airframe rolling Rigid single row ball bearings in steel, cadmium plated Diameter series 0 and 2 Reduced clearance category Dimensions and loads EN 3047, Aerospace series Bearings, airframe rolling Rigid single row ball bearings in c
14、orrosion resisting steel Diameter series 0 and 2 Reduced clearance category Dimensions and loads EN 3053, Aerospace series Bearings, airframe rolling Single row self-aligning roller bearings in steel Dimensions and loads EN 3054, Aerospace series Bearings, airframe rolling Single row self-aligning r
15、oller bearings in steel, cadmium plated Dimensions and loads EN 3055, Aerospace series Bearings, airframe rolling Single row self-aligning roller bearings in corrosion resisting steel Dimensions and loads EN 3056, Aerospace series Bearings, airframe rolling Rigid double row ball bearings in steel Di
16、mensions and loads EN 3057, Aerospace series Bearings, airframe rolling Rigid double row ball bearings in steel, cadmimum plated Dimensions and loads EN 3058, Aerospace series Bearings, airframe rolling Rigid double row ball bearings in corrosion resisting steel Dimensions and loads EN 3281, Aerospa
17、ce series Bearings, airframe rolling Rigid single row ball bearings in steel Diameter series 8 and 9 Dimensions and loads EN 3282, Aerospace series Bearings, airframe rolling Rigid single row ball bearings in steel, cadmium plated Diameter series 8 and 9 Dimensions and loads EN 3283, Aerospace serie
18、s Bearings, airframe rolling Rigid single row ball bearings in corrosion resisting steel Diameter series 8 and 9 Dimensions and loads EN 3284, Aerospace series Bearings, airframe rolling Rigid single row ball bearings in steel Diameter series 0 and 2 Normal clearance category Dimensions and loads EN
19、 3285, Aerospace series Bearings, airframe rolling Rigid single row ball bearings in steel, cadmium plated Diameter series 0 and 2 Normal clearance category Dimensions and loads prEN 3280:2010 (E) 4 EN 3286, Aerospace series Bearings, airframe rolling Rigid single row ball bearings in corrosion resi
20、sting steel Diameter series 0 and 2 Normal clearance category Dimensions and loads EN 3287, Aerospace series Bearings, airframe rolling Double row self-aligning ball bearing in steel Diameter series 2 Dimensions and loads EN 3288, Aerospace series Bearings, airframe rolling Double row self-aligning
21、ball bearing in steel cadmium plated Diameter series 2 Dimensions and loads EN 3289, Aerospace series Bearings, airframe rolling Double row self-aligning ball bearings in corrosion resisting steel Diameter series 2 Dimensions and loads EN 3290, Aerospace series Bearings, airframe rolling Single row
22、self-aligning roller bearing in steel Diameter series 3 and 4 Dimensions and loads EN 3291, Aerospace series Bearings, airframe rolling Single row self-aligning roller bearing in steel, cadmium plated Diameter series 3 and 4 Dimensions and loads EN 3292, Aerospace series Bearings, airframe rolling S
23、ingle row self-aligning roller bearing in corrosion resisting steel Diameter series 3 and 4 Dimensions and loads EN 4033, Aerospace series Bearings, airframe rolling Rigid single row ball bearings in corrosion resisting steel Diameter series 8 and 9, reduced internal radial clearance Dimensions and
24、loads EN 4034, Aerospace series Bearings, airframe rolling Double row self-aligning ball bearings with flanged outer ring in corrosion resisting steel, reduced internal radial clearance Dimensions and loads EN 9100, Quality management systems Requirements for Aviation, Space and Defense Organization
25、s EN 9133, Aerospace series Quality assurance EN aerospace products Qualification procedure ISO 1132, Rolling bearings Tolerances Part 1: Terms and definitions AS 7949, Bearings, Ball, Airframe, Anti-friction, General Standard for 1)3 Terms and definitions For the purposes of this document, the foll
26、owing terms and definitions apply. 3.1 rolling bearings, rigid or self-aligning 3.1.1 general these bearings have a full complement of balls or rollers 3.1.2 shielded rolling bearing a bearing whose rolling elements and raceways are protected with shields attached to one of the rings and separated f
27、rom the other by a small space 1) Published by: SAE National (US) Society of Automotive Engineers http:/www.sae.org/ prEN 3280:2010 (E) 5 3.1.3 sealed rolling bearing a bearing whose rolling elements and raceways are completely enclosed by seals attached to one of the rings and rubbing on the other
28、3.2 surface discontinuities 3.2.1 crack break in the material which may extend in all directions and be intercrystalline or transcrystalline in character 3.2.2 score, scratch open surface defect 3.2.3 Lap surface defect where particles of metal or sharp edges are folded over and then rolled or forge
29、d into the surface 3.2.4 seam unwelded fold which appears as an defect in the material 3.3 radial (Kia, Kea) and axial (Sia, Sea) running accuracy see ISO 1132 3.4 internal clearances 3.4.1 radial (Gr) total value of possible radial displacements of one ring in relation to the other 3.4.2 axial (Ga)
30、 total value of possible axial displacements of one ring in relation to the other 3.4.3 diagonal (Gd) value of total cant of the inner ring in relation to the outer ring 3.5 starting torque at zero load maximum torque required to start the rotation of the outer ring with the inner ring held stationa
31、ry 3.6 delivery batch this consist of bearings with the same identity block, which may come from different production batches prEN 3280:2010 (E) 6 4 Required characteristics, inspection and test methods See Table 1. Table 1 Clause Characteristics Requirements Inspection and test methods Q a Ab4.1 Ma
32、terials In accordance with the product standards or design documentation. Chemical analysis or certificate issued by semi-finished product manufacturer X X 4.2 Dimensions and tolerances In accordance with the product standards or design documentation. Suitable measuring instruments Measurement of bo
33、re and outer diameter: - Rings with a width of 10 mm: in the centre plane. - Rings with a width of 10 mm: in two planes parallel to the outer faces and at a distance from these faces of twice the maximum value of the ring chamfer. The minimum and maximum diameters shall be determined in each measuri
34、ng plane. Measurement of ring width: - The width of each ring (distance between the two faces) shell be verified at a minimum of four points. X X 4.3 Masses In accordance with the product standards or design documentation. Suitable methods X 4.4 Marking In accordance with the product standards or de
35、sign documentation. It shall be legible and shall not adversely affect the material or the functioning of the bearing. Visual examination X X 4.5 Surface appearance X X 4.5.1 Assembled bearings Visual inspection using suitable methods 4.5.2 Unassembled rings No surface discontinuities liable to have
36、 an adverse effect on their characteristics and endurance. Magnetic or dye penetrant inspection 4.5.3 Rolling element See 4.5.1. Rolling element must be supplied with certificate of conformity. X X 4.6 Hardness In accordance with the product standards or design documentation. Suitable processes and
37、measuring instruments c X X 4.7 Surface roughness In accordance with product standards or design documentation. Suitable measuring instruments or visual-tactile samplescX X 4.8 Surface treatment In accordance with product standards or design documentation. - Visual inspection - As per surface treatm
38、ent standard X X 4.9 Lubrification At least 80 % of the free space in the bearing shall be charged with the grease specified in the product standards or design documentation (see Annex G). Visual inspection after removal of seals or shields X Visual inspection during manufacture X 4.10 Seals (for se
39、aled bearings) and shields (for shielded bearings) continued prEN 3280:2010 (E) 7 Table 1 (concluded) Clause Characteristics Requirements Inspection and test methods Q a Ab All bearings: - The seals and shields shall be fitted correctly on the outer ring, in such a way that the functioning of the be
40、aring is not affected. Visual inspection 4.10.1 Retention Self-aligning bearings: - After the test, the seals and shields shall not have loosened or become deformed. See Annex A. X X 4.10.2 Sealing The seals shall rub on the inner ring and retain the grease Visual inspection after the rings are manu
41、ally turned in relation to each other. X X The seals shall prevent the penetration of foreign bodies. After the test, the running behaviour of the bearings shall conform with 4.13.1. See Annex B. X 4.10.3 Temperature test After the test, the behaviour shall conform with 4.10.1. See Annex C. X 4.11 R
42、unning accuracy: - radial: KjaKea - axial: SiaSeaIn accordance with the product standards or design documentation. See Annex D. X X 4.12 Internal clearances: - radial: Gr - axial: Ga - diagonal: GdIn accordance with the product standards or design documentation. See Annex E. X X 4.13 Behaviour in ro
43、tation 4.13.1 At ambient temperature No tights spots, e.g: rolling elements catching in the filling slots See Figures F.2 and F.4. X X 4.13.2 At limit temperatures After the test, the mean starting torque shall not exceed 1,5 times the mean of the values recorded before the test. See Annex C. X No t
44、ight spots See Figures F.2 and F.4. 4.14 Starting torques without load In accordance with the product standards or design documentation. Suitable procedures and measuring instruments X X - Rotate one of the two ring at least four times to distribute the lubricant uniformity - Measure at least five t
45、imes the torque gradually applied to the outer ring, with the inner ring held stationary. Just the highest value shall be taken into account 4.15 Permissible static leads: In accordance with the product standard or design documentation . See Annex F. X - radial: Cs - axial: Famax. After removing the
46、 loads, there shall be no permanent deformations. 4.16 Ultimate static - radial - axial After the removal of the loads, there shall be no cracks or deterioration of the bearing. See Annex F. X aQ: Qualification test bA: Acceptance test cThis inspection shall be made in the absence of surface treatme
47、nt, which, for the purpose of qualification, may be removed by a chemical process. prEN 3280:2010 (E) 8 5 Quality assurances 5.1 Product qualification See EN 9133 and Tables 2 and 3. Qualification shall be obtained for each bearing. However, qualification: for a cadmium plated bearing applies to a n
48、on cadmium plated bearing with the same dimensions and of the same type, made of the same material; is acquired if it has been obtained, for the bearing immediately before and the one immediately after the bearing in question, within the range of bearings indicated in the product standard. To qualif
49、y a bearing of a given range, the manufacturer shall provide: nine bearings if this is the first qualification in this range; seven bearings for all the other qualifications. 5.2 Acceptance conditions 5.2.1 Inspections and tests to be carried out by the manufacturer The acceptance of a delivery batch shall be in accordance with Table 4. 5.2.2 Users quality control The us
