1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA
2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any
3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ICS 21.100.10 ISBN 0-626-16988-7 SANS 12240-4:2005Edition 1 and ISO tech. corr. 1ISO 12240-4:1998Edition 1 and tech. corr. 1 SOUTH AFRICAN NATIONAL STAND
4、ARD Spherical plain bearings Part 4: Spherical plain bearing rod ends This national standard is the identical implementation of ISO 12240-4:1998 and ISO technical corrigendum 1, and is adopted with the permission of the International Organization for Standardization. Published by Standards South Afr
5、ica 1 dr lategan road groenkloof private bag x191 pretoria 0001 tel: 012 428 7911 fax: 012 344 1568 international code + 27 12 www.stansa.co.za Standards South Africa SANS 12240-4:2005 Edition 1 and ISO tech. corr. 1 ISO 12240-4:1998 Edition 1 and tech. corr. 1 Table of changes Change No. Date Scope
6、 Tech. corrigendum 1 1999 Amended to change the values for rsand r1sfor the diameter of 20 mm in table 3. Abstract Specifies dimensions, tolerances and radial internal clearances for various dimension series of spherical plain bearing rod ends. Keywords bearings, clearances, dimensional series, dime
7、nsional tolerances, dimensions, internal clearances, knuckle bearings, plain bearings, rod ends, rolling bearings, spherical bearings, tolerances (measurement). National foreword This South African standard was approved by National Committee StanSA TC 5120.02, Bearings, in accordance with procedures
8、 of Standards South Africa, in compliance with annex 3 of the WTO/TBT agreement. ICS 21.100.10 Ref. No. ISO 12240-4:1998/Cor.1:1999(E) ISO 1999Printed in SwitzerlandAINTERNATIONAL STANDARD ISO 12240-4:1998TECHNICAL CORRIGENDUM 1Published 1999-07-15INTERNATIONAL ORGANIZATION FOR STANDARDIZATION ORGAN
9、ISATION INTERNATIONALE DE NORMALISATIONSpherical plain bearings Part 4:Spherical plain bearing rod endsTECHNICAL CORRIGENDUM 1Rotules lisses Partie 4: Embouts rotuleRECTIFICATIF TECHNIQUE 1Technical Corrigendum 1 to International Standard ISO 12240-4:1998 was prepared by Technical CommitteeISO/TC 4,
10、 Rolling bearings, Subcommittee SC 7, Spherical plain bearings.Page 7Table 3For d = 20 mm, the value for rsshould be 0,3 mm (instead of 0,6 mm) and the value for r1sshould be 0,6 mm(instead of 0,3 mm).This page is intentionally left blankAReference numberISO 12240-4:1998(E)INTERNATIONALSTANDARDISO12
11、240-4First edition1998-08-15Spherical plain bearings Part 4:Spherical plain bearing rod endsRotules lisses Partie 4: Embouts rotuleISO 12240-4:1998(E) ISO 1998All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, elect
12、ronicor mechanical, including photocopying and microfilm, without permission in writing from the publisher.International Organization for StandardizationCase postale 56 CH-1211 Genve 20 SwitzerlandInternet isoiso.chPrinted in SwitzerlandiiForewordISO (the International Organization for Standardizati
13、on) is a worldwide federation of national standard bodies(ISO member bodies). The work of preparing International Standards is normally carried out through ISOtechnical committees. Each member body interested in a subject for which a technical committee has beenestablished has the right to be repres
14、ented on that committee. International organizations, governmental andnon-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the InternationalElectrotechnical Commission (IEC) on all matters of electrotechnical standardization.Draft International Standards a
15、dopted by the technical committees are circulated to the member bodies forvoting. Publication as an International Standard requires approval by at least 75 % of the member bodies castinga vote.International Standard ISO 12240-4 was prepared by Technical Committee ISO/TC 4, Rolling bearings,Subcommit
16、tee SC 7, Spherical plain bearings.This first edition cancels and replaces ISO 6126:1987 of which it constitutes a technical revision.ISO 12240 consists of the following parts, under the general title Spherical plain bearings: Part 1: Radial spherical plain bearings Part 2: Angular contact radial sp
17、herical plain bearings Part 3: Thrust spherical plain bearings Part 4: Spherical plain bearing rod endsINTERNATIONAL STANDARD ISO ISO 12240-4:1998(E)1Spherical plain bearings Part 4:Spherical plain bearing rod ends1 ScopeThis part of ISO 12240 specifies dimensions, tolerances and radial internal cle
18、arances for various dimensionseries of spherical plain bearing rod ends.The dimensions and tolerances specified in this part of ISO 12240 have been selected to permit the design anduse of spherical plain bearing rod ends which incorporate radial spherical plain bearings having various slidingmateria
19、l combinations.The specified tolerance values apply for finished spherical plain bearing rod ends before any coating, plating, ringsplitting or fracturing.Spherical plain bearing rod ends need not conform to the designs illustrated but compliance is required asregards dimensions, tolerances and radi
20、al internal clearances specified.NOTE Spherical plain bearing rod ends for airframe applications and specific spherical plain baring rod ends fordirect connection to hydraulic cylinders are not covered by this part of ISO 12240.2 Normative referencesThe following standards contain provisions which,
21、through reference in this text, constitute provisions of this partof ISO 12240. At the time of publication, the editions indicated were valid. All standards are subject to revision,and parties to agreements based on this part of ISO 12240 are encouraged to investigate the possibility ofapplying the
22、most recent editions of the standards indicated below. Members of IEC and ISO maintain registers ofcurrently valid International Standards.ISO 582:1995, Rolling bearings Chamfer dimensions Maximum values.ISO 965-1:1992, ISO general purpose metric screw threads Tolerances Part 1: Principles and basic
23、 data.ISO 1132-1: 1), Rolling bearings Tolerances Part 1: Terms and definitions.ISO 6811:1998, Spherical plain bearings Vocabulary.ISO 12240-1:1998, Spherical plain bearings Part 1: Radial spherical plain bearings._ _1) To be published. (Revision of ISO 1132:1980)ISO 12240-4:1998(E) ISO23 Definition
24、s and symbolsFor the purposes of this part of ISO 12240, the definitions given in ISO 1132-1 and ISO 6811 apply. The symbols(except those for tolerances) shown in the figures and the values given in the tables denote nominal dimensionsunless specified otherwise.B Inner ring widthC Outer ring widthC1
25、Width of rod end eyeD Outside diameter of bearing outer ringd Bore diameter of inner ringd1Outside diameter of inner ring faced2Outside diameter of rod end eyed3Rod end shank diameterd4Rod end shank shoulder diameterd5Rod end shank diameter with welding endd6Centre pin diameterdkSphere diameterG Dia
26、meter of threadh,h1,h2Centre height of rod endl1,l3Thread lengthl2,l4,l6Overall length of rod endl5Length of shoulder on rod end shankl7Length of the flat surface from the bearing bore centre to the shankl8Length of the locating pinrs min2) Smallest single chamfer dimension, inner ringr1s min2) Smal
27、lest single chamfer dimension, outer ringVdmpVariation of mean bore diameterVdpVariation of bore diameter in a single radial planeW Width across flats Angle of tiltDBsDeviation of a single inner ring widthDdmpDeviation of mean bore diameter in a single plane2) The corresponding maximum chamfer dimen
28、sions are given in table 1 of ISO 582:1995.ISOISO 12240-4:1998(E)34 Dimension series for spherical plain bearing rod endsA distinction is made between two basic dimension series in the case of spherical plain bearing rod ends.Dimension series E and G have been designed so as to permit the insertion
29、of dimension series E or G radialspherical plain bearings into the cylindrical bore of a rod end eye.In dimension series E and G a distinction is also made between different spherical plain bearing rod end typesaccording to the shank design, i.e. external or internal thread, normal or strengthened f
30、orm, or welding end type.Dimension series K has been designed so as to permit the insertion of dimension series K radial spherical plainbearings into the cylindrical or sphered bore of a rod end eye.In dimension series K a distinction is made between different spherical plain bearing rod end types a
31、ccording tothe shank design, i.e. external or internal thread. A choice of sliding material combination is provided for a twopiece (integral design, see figure 5) spherical plain bearing rod end.5 Angles of tilt aThe specified angles of tilt (approximate values) represent the angles by which the axe
32、s of the inner ring and ofthe outer ring may be inclined in relation to each other without reducing the projected theoretical contact area ofthe two bearing rings when the two ring axes are parallel to each other.NOTE Attention is drawn to the fact that after mounting a spherical plain bearing rod e
33、nd on a shaft, the anglethrough which the rod end can tilt may be restricted by the design of the adjacent components.6 Dimensions, tolerances and radial internal clearances6.1 DimensionsSee figures 1 to 6 and tables 1 to 5.The position of the lubricating nipple may vary according to the size of the
34、 spherical plain bearing rod end.In case of type B, the lubricating nipple may be positioned at the shank.The position and size of the lubricating nipple shall be the subject of agreement.Type and design of lubricating nipple at manufacturers discretion.Figure 1 Spherical plain bearing rod end with
35、external thread type MISO 12240-4:1998(E) ISO41) Values for widths across flats are not specified in this part of ISO 12240.2) See figure 6.l8= 6 mmFigure 2 Spherical plain bearing rod end with internal thread type FFigure 3 Spherical plain bearingrod end with welding shank type SFigure 4 Spherical
36、plainbearing rod end withmounted spherical plainradial bearing (cartridgedesign)Figure 5 Spherical plainbearing rod end with innerring only (integral design) 3)Figure 6 Spherical plain radial bearing inaccordance with ISO 12240-13) This design can apply for types M and F of the K-series.ISOISO 12240
37、-4:1998(E)5Table 1 Spherical plain bearing rod ends, dimension series EISO 12240-4:1998(E) ISO6Table 2 Spherical plain bearing rod ends, according to dimension series E, with strengthened shank,dimension series EHISOISO 12240-4:1998(E)7Table 3 Spherical plain bearing rod ends, dimension series GISO
38、12240-4:1998(E) ISO8Table 4 Spherical plain bearing rod ends, according to dimension series G, with strengthened shank,dimension series GHISOISO 12240-4:1998(E)9Table 5 Spherical plain bearing rod ends, dimension series KISO 12240-4:1998(E) ISO106.2 TolerancesSee table 6.Table 6 Tolerances, dimensio
39、n series E, EH, G, GH, KdDdmpVdpVdmpG 1)h,h1,h2 DBsin accordancewithmax. max. ISO 965-1TypeE, EH, G, GH K E, EH, G, GH K E, EH, G, GH K E, EH, G, GH, K E, EH, G, GH, Kmmmm mm mm mm mm mm mm mmover inclu-dinghigh low high low M F high low2,5 3 0 8 +10 0 8 10 6 6 6g 6H 1 200 0 1203 6 0 8 +12 0 8 12 6
40、9 6g 6H 1 200 0 1206 10 0 8 +15 0 8 15 6 11 6g 6H 1 200 0 12010 18 0 8 +18 0 8 18 6 14 6g 6H 1 200 0 12018 30 0 10 +21 0 10 21 8 16 6g 6H 1 700 0 12030 50 0 12 +25 0 12 25 9 19 6g 6H 2 100 0 12050 80 0 15 +30 0 15 30 11 22 6g 6H 2 700 0 1501) Threads may be right-hand or left-hand.6.3 Radial interna
41、l clearanceRadial internal clearance is the arithmetical mean of the radial distances through which one of the rings may bedisplaced relative to the other, from one eccentric extreme position to the diametrically opposite extremeposition.In case of spherical plain bearing rod ends with split outer r
42、ing these values may deviate slightly.6.3.1 Spherical plain bearing rod ends with sliding contact surfaces: steel/steelSee tables 7, 8 and 9.Table 7 Radial internal clearance, dimension series E, EHd Group 2 Group N Group 3mm mm mm mmover including min. max. min. max. min. max.2,5 12 4 32 16 68 34 1
43、0412 20 5 40 20 82 41 12420 35 6 50 25 100 50 15035 60 8 60 30 120 60 18060 80 9 72 36 142 71 212ISOISO 12240-4:1998(E)11Table 8 Radial internal clearance, dimension series G, GHd Group 2 Group N Group 3mm mm mm mmover including min. max. min. max. min. max.2,5 10 4 32 16 68 34 10410 17 5 40 20 82 4
44、1 12417 30 6 50 25 100 50 15030 50 8 60 30 120 60 18050 70 9 72 36 142 71 212Table 9 Radial internal clearance, dimension series Kd Group 2 Group N Group 3mm mm mm mmover including min. max. min. max. min. max.2,5 8 4 32 16 68 34 1048 16 5 40 20 82 41 12416 25 6 50 25 100 50 15025 40 8 60 30 120 60
45、18040 50 9 72 36 142 71 2126.3.2 Spherical plain bearing rod ends with sliding contact surfaces: steel/bronzeSee table 10.Table 10 Radial internal clearance, dimension series Kd Group 2 Group N Group 3mm mm mm mmover including min. max. min. max. min. max.2,5 6 2 34 5 50 21 72(22) (40) (65)6 10 3 41
46、 7 61 26 88(27) (49) (78)10 18 3 49 8 75 32 107(33) (59) (93)18 30 4 59 10 92 39 120(40) (72) (103)30 50 5 71 13 112 49 150(48) (87) (125)NOTE The reduced values in brackets are permissible for particular designs (see figures 4 and 5). Standards South AfricaThis s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .
