1、BRITISH STANDARD AEROSPACE SERIESBS EN2337:2006Spherical plain bearings Technical specificationThe European Standard EN 2337:2006 has the status of a British StandardICS 49.035g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g
2、3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 2337:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 June 2006 BSI 2006ISBN 0 580 47222 1National forewordThis British Standard is the official English l
3、anguage version of EN 2337:2006. It supersedes BS EN 2337:1996 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee ACE/12, Aerospace fasteners and fastening systems, which has the responsibility to: A list of organizations represented on this committee ca
4、n be obtained on request to its secretary.Cross-referencesThe British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” fa
5、cility of the BSI Electronic Catalogue or of British Standards Online.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligatio
6、ns. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK.Summary of pagesTh
7、is document comprises a front cover, an inside front cover, the EN title page, pages 2 to 21 and a back cover.The BSI copyright notice displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARDNORME EUROPENNEEUROP
8、ISCHE NORMEN 2337May 2006ICS 49.035 Supersedes EN 2337:1996 English VersionAerospace series - Spherical plain bearings - TechnicalspecificationSrie arospatiale - Rotules lisses - Spcification technique Luft- und Raumfahrt - Gelenklager - TechnischeLieferbedingungenThis European Standard was approved
9、 by CEN on 26 October 2005.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstand
10、ards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to th
11、e Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
12、 Poland, Portugal, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2006 CEN All rights of exploitation in any form and by
13、 any means reservedworldwide for CEN national Members.Ref. No. EN 2337:2006: E2 Contents Page Foreword 3 1 Scope .4 2 Normative references .4 3 Terms and definitions.4 4 Required characteristics, inspection and test methods 4 5 Quality assurance .6 6 Packaging7 7 Certificate of compliance8 Annex A (
14、normative) Verification of internal clearance .10 Annex B (normative) Verification of permissible and ultimate static loads .13 Annex C (normative) Lubricants Essential characteristics 17 Annex D (normative) Simplified qualification procedure.18 EN 2337:20063 Foreword This European Standard (EN 2337
15、:2006) has been prepared by the European Association of Aerospace Manufacturers - Standardization (AECMA-STAN). After enquiries and votes carried out in accordance with the rules of this Association, this Standard has received the approval of the National Associations and the Official Services of th
16、e member countries of AECMA, prior to its presentation to CEN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by November 2006, and conflicting national standards shall be withdrawn at the latest by
17、 November 2006. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This European Standard supersedes EN 2337:1996. According to the CEN/C
18、ENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, M
19、alta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. EN 2337:20064 1 Scope This standard specifies the required characteristics, inspection and test methods, qualification and acceptance conditions for spherical plain bearings d
20、esigned to withstand static loads and loads with slight swivelling. It is applicable whenever referenced. 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 references, th
21、e latest edition of the referenced document (including any amendments) applies. EN 2335, Aerospace series Bearings, spherical plain in corrosion resisting steel without assembly slot Dimensions and loads. EN 2336, Aerospace series Bearings, spherical plain in steel with assembly slots Dimensions and
22、 loads. EN 2588, Aerospace series Bearings, spherical plain in corrosion resisting steel with assembly slots Dimensions and loads. EN 4265, Aerospace series Bearings, spherical plain, in corrosion resisting steel Wide series Dimensions and loads Inch series. 1)EN 4266, Aerospace series Bearings, sph
23、erical plain, in corrosion resisting steel, cadmium plated Wide series Dimensions and loads Inch series. 1)EN 6046, Aerospace series Bearings, spherical plain, in corrosion resisting steel Narrow series Dimensions and loads Inch series. 1)EN 9100, Aerospace series Quality management systems Requirem
24、ents (based on ISO 9001:2000) and Quality systems Model for quality assurance in design, development, production, installation and servicing (based on ISO 9001:1994). EN 9133, Aerospace series Quality management systems Qualification Procedure for aerospace standard parts. EN 10204, Metallic product
25、s Types of inspection documents. TR 4475, Aerospace series Bearings and mechanical transmissions for airframe applications Vocabulary. 2)3 Terms and definitions For the purposes of this standard, the terms and definitions given in TR 4475 apply. 4 Required characteristics, inspection and test method
26、s See Table 1. 1) Published as AECMA Prestandard at the date of publication of this standard. 2) Published as AECMA Technical Report at the date of publication of this standard. EN 2337:20065 Table 1 Subclause Characteristics Requirements Inspection and test methods Q aAb4.1 Materials In accordance
27、with the product standards or design documentation Chemical analysis or certificate 2.1 according to EN 10204 issued by semi-finished products manufacturer X X 4.2 Dimensions In accordance with the product standards or design documentation Suitable measuring instruments Measurement of bore and outer
28、 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 are determined in each measuring plane. Measurement
29、 of ring width: The width of each ring (distance between the two faces) is 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 design documentation. It shall b
30、e legible and shall not adversely affect the material or the functioning of the bearing. Visual examination X X 4.5 Surface appearance 4.5.1 Assembled spherical bearings Visual examination using suitable methods X X 4.5.2 Unassembled rings The bearing shall be free of surface discontinuities liable
31、to have an adverse effect on their characteristics and endurance. Magnetic or dye penetrant inspection X X 4.6 Hardness In accordance with the product standards or design documentation Suitable processes and measuring instruments X X (continued) EN 2337:20066 Table 1 (concluded) Subclause Characteri
32、stics Requirements Inspection and test methods Q aA b4.7 Surface roughness In accordance with the product standards or design documentation Suitable measuring instruments or visual-tactile samples X X 4.8 Lubrication In accordance with the product standards or design documentation. Visual inspection
33、 X X The dry lubricant shall be compatible with the code A or code B grease (see Annex C) which may be used in accordance with the product standards or design documentation. Suitable method 4.9 Internal clearance: radial axial In accordance with the product standards or design documentation See Anne
34、x A X X 4.10 Behaviour in rotation and swivelling The bearings shall be able to move freely within the angular limits specified in the product standards or design documentation for swivelling. Manual inspection X X 4.11 Permissible static loads: In accordance with the product standards or design doc
35、umentation See Annex B X radial: CsAfter the removal of the loads, no permanent deformations 0,07 mm axial: CaAfter the removal of the loads, no permanent deformations 0,10 mm 4.12 Ultimate static loads: radial axial After the removal of the loads, there shall be no cracks or deterioration of the be
36、aring See Annex B X aQ: Qualification test bA: Acceptance test 5 Quality assurance 5.1 Product qualification According to EN 9133 and Tables 2 and 3 and Annex D. EN 2337:20067 Qualification shall be obtained for each bearing. However, “de facto“ qualification of a bearing is acquired if it has been
37、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. 5.2 Acceptance conditions 5.2.1 Inspections and tests to be carried out by the manufacturer See Table 4. 5.2.2 Purchasers (users) quality
38、control The purchaser (user) may, on acceptance of a delivery batch, proceed to inspect it by using the inspections specified in Table 4, in full or in part, to ensure that the items conform to the required quality level, and to determine whether the delivery batch is acceptable. This inspection may
39、 be carried out in the purchasers (users) factory, or, by special agreement, in the manufacturers factory. 6 Packaging The bearings shall be packaged either individually or in rolls so that they will not be damaged during transportation. They shall be protected against moisture, corrosion, dirt and
40、other harmful substances. The packaging material in contact with the bearing shall provide this protection and be grease-resistant. The following indications shall be affixed to each individual package: manufacturers name and address; quantity (for rolls); identity block as defined by product standa
41、rds or design documentation; packaging date; lubrication date. The following indications at least shall appear on collective packaging: manufacturers name and address; number of order; quantity; identity block(s) as defined by the product standards or design documentation. EN 2337:20068 7 Certificat
42、e of compliance All the bearings supplied in accordance with this standard shall be accompanied by a certificate of compliance according to EN 10204, 2.1 or 3.1 issued by the manufacturer for each production batch. Table 2 Non-destructive inspections and tests to be carried out for qualification Ser
43、ial number of samples Types of inspections and tests aDefined in subclause 1 2 3 4 5 Materials 4.1 X X X X X Dimensions 4.2 X X X X X Mass 4.3 X X X X X Marking 4.4 X X X X X Surface appearance 4.5 X X X X X Hardness 4.6 X Surface roughness 4.7 X Lubrication 4.8 X X X X X Internal clearances 4.9 X X
44、 X X X Behaviour in rotation and swivelling 4.10 X X X X X aThe order is left to the initiative of the qualification authority. Table 3 Destructive inspections and tests to be carried out for qualification Serial number of samples Types of inspections and tests aDefined in subclause 1 2 3 4 5 permis
45、sible (Cs) 4.11 X X X radial ultimate 4.12 X X X permissible (Ca) 4.11 X X X Test under static load axial ultimate 4.12 X X aThe order is left to the initiative of the qualification authority. EN 2337:20069 Table 4 Inspections and tests to be carried out for acceptance Types of inspections and tests
46、 aDefined in subclause Sampling plan b, cMaterials 4.1 Chemical analysis or certificate 2.1 according to EN 10204 issued by semi-finished product manufacturer. Dimensions 4.2 10 % dMarking 4.4 100 %Assembled spherical bearings 4.5.1 10 % dSurface appearance Unassembled rings 4.5.2 10 % dHardness 4.6
47、 5 % dSurface roughness 4.7 5 % dLubrication 4.8 100 % Internal clearance 4.9 10 % dBehaviour in rotation and swivelling 4.10 100 % aThe order is left to the initiative of the acceptance authority. These inspections may be carried out at the time of manufacture. bWhen the sampling is not 100 %, any
48、defect found in the course of an inspection or test requires this inspection to be extended to 100 %. cMay vary with the approval of the purchaser (user) or authority responsible for acceptance. dMinimum one part. EN 2337:200610 Annex A (normative) Verification of internal clearance A.1 Radial inter
49、nal clearance A.1.1 Principle According to Figure A.1, as an example. A.1.2 Method Mount the bearing vertically and immobilize the inner ring (in the case of a bearing with assembly slots, the direction of application of the load shall be at 90 to the slot centre line). Place a dial gauge in the radial plane of the bearing. Apply the load F (see Table A.1) in the direction of the dial gauge and then in the opposite direction.
