BS EN 4538-2:2014 BSI Standards Publication Aerospace series — Bearings, spherical plain, in corrosion resisting steel with selflubricating liner elevated load under low oscillations — Narrow series — Dimensions and loads Part 2: Inch series BS EN 4538-2:2014 BRITISH STANDARD National foreword This British Standard is the UK implementation of EN 4538-2:2014 The UK participation in its preparation was entrusted to Technical Committee ACE/12, Aerospace fasteners and fastening systems A list of organizations represented on this committee can be obtained on request to its secretary This publication does not purport to include all the necessary provisions of a contract Users are responsible for its correct application © The British Standards Institution 2014 Published by BSI Standards Limited 2014 ISBN 978 580 81520 ICS 49.035 Compliance with a British Standard cannot confer immunity from legal obligations This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 July 2014 Amendments issued since publication Date Text affected BS EN 4538-2:2014 EN 4538-2 EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM July 2014 ICS 49.035 English Version Aerospace series - Bearings, spherical plain, in corrosion resisting steel with self-lubricating liner elevated load under low oscillations - Narrow series - Dimensions and loads - Part 2: Inch series Série aérospatiale - Rotules, en acier résistant la corrosion garniture autolubrifiante charge élevée sous faibles oscillations - Série étroite - Dimensions et charges Partie 2: Série en inches Luft- und Raumfahrt - Gelenklager, aus korrosionsbeständigem Stahl mit selbstschmierender Beschichtung, hohe Belastung bei geringer Drehbewegung - Schmale Reihe - Maße und Belastungen - Teil 2: Inch Reihe This European Standard was approved by CEN on 21 March 2013 CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member This European Standard exists in three official versions (English, French, German) A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels © 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members Ref No EN 4538-2:2014 E BS EN 4538-2:2014 EN 4538-2:2014 (E) Contents Page Foreword Scope Normative references Symbols and definitions 4 4.1 4.2 4.3 4.4 4.5 Required characteristics Configuration, dimensions, tolerances and masses Surface roughness Loads and starting torques Materials and surface treatments Surface treatment on the inner ring Designation Marking Technical specification BS EN 4538-2:2014 EN 4538-2:2014 (E) Foreword This document (EN 4538-2:2014) has been prepared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-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 the member countries of ASD, 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 January 2015, and conflicting national standards shall be withdrawn at the latest by January 2015 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 According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom BS EN 4538-2:2014 EN 4538-2:2014 (E) Scope This European Standard specifies the characteristics of spherical plain bearing in corrosion resistant steel, with self-lubricating liner, narrow series, elevated load under low oscillations applications They shall be used in the temperature range – 55 °C to 163 °C Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application For dated references, only the edition cited applies For undated references, the latest edition of the referenced document (including any amendments) applies EN 2030, Aerospace series — Steel X105CrMo17 (1.4125) — Hardened and tempered — Bars — De ≤ 150 mm 1) EN 2424, Aerospace series — Marking of aerospace products EN 3161, Aerospace series — Steel FE-PM3801 (X5CrNiCu17-4) — Air melted, solution treated and precipitation treated, bar a or D ≤ 200 mm, Rm ≥ 930 MPa EN 4540, Aerospace series — Bearings, spherical plain, in corrosion resisting steel with self-lubricating liner elevated load under low oscillations — Technical specification ISO 1132-1, Rolling bearings — Tolerances — Part 1: Terms and definitions ISO 8075, Aerospace — Surface treatment of hardenable stainless steel parts Symbols and definitions For the purposes of this document, the symbols and definitions given in ISO 1132-1 apply ∆dmp = single plane mean bore diameter deviation ∆ds = deviation of a single bore diameter ∆Dmp = single plane mean outside diameter deviation ∆Ds = deviation of a single outside diameter α = angle of tilt of the outer ring with respect to the inner ring, the spherical surface of the outer ring being completely in contact with the inner ring 1) Published as ASD-STAN Prestandard at the date of publication of this standard http://www.asd-stan.org/ BS EN 4538-2:2014 EN 4538-2:2014 (E) Required characteristics 4.1 Configuration, dimensions, tolerances and masses See Figures and and Table The dimensions are expressed in millimetres and apply after surface treatment 4.2 Surface roughness See Figures and The values are expressed in micrometres and apply before surface treatment 3,2, 0,2 0,8 Figure — Bearing without swaging groove, code S BS EN 4538-2:2014 EN 4538-2:2014 (E) 3,2, 0,2 0,8 Key Break sharp corner 0,12 max Figure — Bearing with swaging groove, code R Table Dimensions in millimetres d B C D Tolerances d1 a K N P R ≈ + 0,1 0 – 0,2 + 0,1 0,7 0,127 to 0,254 µm Code nom − 0,06 ± 0,1 03 4,826 7,137 5,537 14,287 7,442 11,1 12,7 04 6,35 8,712 6,35 16,667 9,245 12,7 15,087 05 7,937 9,525 7,137 19,05 10,642 15,062 16,51 06 9,525 10,312 7,925 20,637 12,065 15,875 18,08 07 11,113 11,1 8,712 23,017 08 12,7 12,7 9,906 25,4 ∆dmp 09 14,288 14,275 11,1 27,78 10 15,875 15,875 12,7 30,163 12 19,05 14 22,225 22,225 17,856 39,687 ∆ds − 13 25,4 25,4 20 31,75 27,762 23,926 24 38,1 28 44,45 38,887 33,45 71,437 33,32 28,83 61,912 15,24 − 13 + 17,018 22,225 24,638 − 15 18,77 25,4 27 33,35 r1 αb θ max ± 0,5 0,76 10° 20° 0,254 to 0,508 1,4 0,508 to 0,762 22 31 0,127 to 0,381 1,01 36,703 45,237 47,7 57,15 58,85 50,71 64 68,33 40 8° 30° 54 95 122 28,397 39,675 41,3 47,5 18 0,889 24,892 34,125 36,525 + − 15 ≈ 14 9° 0,254 to 0,432 Mass g/piece 1,5 0,254 to 0,508 0,762 to 1,02 a Attention should be paid to the possible indentation of the support mountings by the inner ring bearing faces b Maximum values for the user T 0,9 19,837 22,250 23,368 31,75 20,243 44,45 50,8 ∆Ds 13,462 17,449 20,472 + − 13 19,05 15,062 36,513 16 ∆Dmp r 1,14 9° 176 240 6° 405 658 BS EN 4538-2:2014 EN 4538-2:2014 (E) 4.3 Loads and starting torques See Table Table Code Permissible static loads kN Radial Cs Permissible dynamic radial loads 25 000 cycles Minimum projected surface area b kN mm Axial a Cs 03 17,68 0,66 6,67 44,5 04 26,86 1,91 14,77 61,3 05 38,92 3,11 24,30 84,5 06 46,88 4,89 29,37 97,6 07 58,71 6,22 35,82 121 08 79,62 9,34 46,28 161,2 09 103,19 16,37 57,85 201,5 10 135,67 20,99 73,20 270,9 12 206,39 30,02 105,02 405,6 14 276,68 41,58 134,61 531,3 16 365,64 54,09 169,10 712,4 20 405,00 78,00 200,27 978,9 24 619,39 117,06 322,08 517,3 151 448,90 994,8 28 274,32 Starting torques N.m 0,06 0,34 0,11 0,56 0,23 0,9 0,40 1,50 a These values apply to bearings without staking groove For bearings with staking groove, the push-out loads may be smaller than these values b The projected surface area values are given to determine for each bearing size the duty cycle loads The duty cycles are defined in the technical specification EN 4540 4.4 Materials and surface treatments Inner ring: steel EN 2030, hardness 55 HRC to 62 HRC Outer ring: steel EN 3161, hardness 28 HRC to 37 HRC before swaging Liner: 4.5 self-lubricating low friction wear resistant material consistent with the requirements of EN 4540 Surface treatment on the inner ring Surface treatment at the convenience of the bearing manufacturer to fulfil the requirements of the dimensional standard and of the technical specification (see ISO 8075) BS EN 4538-2:2014 EN 4538-2:2014 (E) Designation EXAMPLE Description block BEARING Identity block EN4538-2-12A Number of this standard Diameter code (see Table 1) Technology code Where the following technology codes are applied: – code A, bonded liner technology; – code B, injected or moulded liner technology; – without code, both technologies can be used at user’s convenience NOTE If necessary, the code I9005 should be placed between the description block and the identity block Marking EN 2424, style A The marking position is at the manufacturer’s option Bearings ordered without technology code shall be delivered marked in accordance with its technology code Technical specification See EN 4540 This page deliberately left blank NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW British Standards Institution (BSI) BSI is the national body responsible for preparing British Standards and other standards-related publications, information and services BSI is incorporated by 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