1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS ISO 4209-2:2012T r u c k a n d b u s t y r e s a n d rims (metric series)Part 2: RimsBS ISO 4209-2:2012 BRITISH STANDARDNational forewordThis British Standard is the UK implem
2、entation of ISO 4209-2:2012. It supersedes BS AU 50-4.2.1a:2002, which is withdrawn.The UK participation in its preparation was entrusted to T e c h n i c a l C o m m i t t e e A U E / 4 , T y r e s a n d w h e e l s f o r m o t o r v e h i c l e s .A list of organizations represented on this commit
3、tee 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 2012Published by BSI Standards Limited 2012ISBN 978 0 580 62763 7 ICS 43.040.5
4、0; 43.080.01 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 30 September 2012.Amendments issued since publicationDate T e x t a f f e c t e dBS ISO 4209-2:2012
5、ISO 2012Truck and bus tyres and rims (metric series) Part 2: RimsPneumatiques et jantes (sries millimtriques) pour camions et autobus Partie 2: JantesINTERNATIONAL STANDARDISO4209-2Fourth edition2012-09-01Reference numberISO 4209-2:2012(E)BS ISO 4209-2:2012ISO 4209-2:2012(E)ii ISO 2012 All rights re
6、servedCOPYRIGHT PROTECTED DOCUMENT ISO 2012All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the addr
7、ess below or ISOs member body in the country of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 4209-2:2012ISO 4209-2:2012(E) ISO 2012 All rights reserved iiiContents Pa
8、geForeword iv1 Scope 12 Normative references . 13 Terms and definitions . 14 Designation and marking 15 5 tapered (drop-centre) rims . 15.1 Rim flange . 15.2 Rim contours 15.3 Rim diameter and hump circumference 45.4 Valve holes 46 15 tapered (drop-centre) rims . 66.1 Rim contours 66.2 Rim diameters
9、 86.3 Valve holes 9Bibliography . 11BS ISO 4209-2:2012ISO 4209-2:2012(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO techn
10、ical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely
11、with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.The main task of technical committees is to prepare International Standards. Draft Inte
12、rnational Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.Attention is drawn to the possibility that some of the elements of this document may
13、 be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights.ISO 4209-2 was prepared by Technical Committee ISO/TC 31, Tyres, rims and valves, Subcommittee SC 4, Truck and bus tyres and rims.This fourth edition cancels and replaces the third editi
14、on (ISO 4209-2:2001), which has been technically revised.ISO 4209 consists of the following parts, under the general title Truck and bus tyres and rims (metric series): Part 1: Tyres Part 2: Rimsiv ISO 2012 All rights reservedBS ISO 4209-2:2012INTERNATIONAL STANDARD ISO 4209-2:2012(E)Truck and bus t
15、yres and rims (metric series) Part 2: Rims1 ScopeThis part of ISO 4209 specifies the designations, contours and dimensions of drop-centre (one-piece) rims for use on trucks and buses.The rim dimensions are those rim contour dimensions necessary for mounting and fitment of the tyre to the rim.Tyre de
16、signations, dimensions and load ratings are given in ISO 4209-1.2 Normative referencesThe following referenced documents are indispensable for the application of the document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document
17、(including any amendments) applies.ISO 3911, Wheels and rims for pneumatic tyres Vocabulary, designation and markingISO 4000-2, Passenger car tyres and rims Part 2: Rims3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 3911 apply.4 Designation and marki
18、ngThe rim shall be designated by its nominal rim diameter code and nominal rim width code (e.g. 17.5 5.25), and rim flange when specified (for example: 16 6 K).5 5 tapered (drop-centre) rims5.1 Rim flangeRecommended rim flange contours for K rims are given in Table 1.Refer to ISO 4000-2 for B and J
19、contour rims.5.2 Rim contoursThe dimensions and tolerances of the rims shall be as given in Figure 1 and Tables 1 and 2.Optional bead seat contours and their dimensions are given in Figure 2 and Table 3. ISO 2012 All rights reserved 1BS ISO 4209-2:2012ISO 4209-2:2012(E)Dimensions in millimetresKey1
20、valve hole (see 5.4)NOTE For use with tubeless tyres, humps are necessary on the vehicle outboard side and preferred on the vehicle inboard side.aTyre-mounting side.bBreak corner equivalent to 0,5 minimum R.cFlange width includes edge radius. The portion of a flange beyond the minimum width shall no
21、t be higher than the highest point of the flange.dThese dimensions comprise the minimum well envelope for tyre-mounting purposes, except for localized areas at the weld or the valve hole.Figure 1 Contour of 5 tapered (drop-centre) rimsTable 1 Dimensions of 5 (drop-centre) rim contoursDimensions in m
22、illimetresNominal rim diameter codeNominal rim width code and flange typebBGPP1H aLMR2min. 1,0 min. min. gauge gauge max. min.16 6 K and wider 11,5 20 19,5 19,5 20 22 47 10,5aMinimum dimensions for the well depth, H, and the well angle are required for tyre-mounting. Larger values may be required to
23、 ensure sufficient space for tubeless tyre valve seating.bDimension A = nominal rim width code 25,4 (rounded to 0,5 mm) (increments of code = 0,5).2 ISO 2012 All rights reservedBS ISO 4209-2:2012ISO 4209-2:2012(E)Table 2 Nominal rim width codeNominal rim width codeAmm6.00 6 152,56.50 6 1/2 1657.00 7
24、 1787.50 7 1/2 190,58.00 8 2038.50 8 1/2 2169.00 9 228,59.50 9 1/2 241,510.00 10 25410.50 10 1/2 266,511.00 11 279,512.00 12 30513.00 13 33014.00 14 355,515.00 15 381Dimensions in millimetresaNon-mounting side.bTyre-mounting side.Figure 2 Optional bead seat contours ISO 2012 All rights reserved 3BS
25、ISO 4209-2:2012ISO 4209-2:2012(E)Table 3 E dimension for round humpsNominal rim width code and flange typeEmm6 K and wider 21020+ ,For E,19 5020,+is also permitted.5.3 Rim diameter and hump circumferenceThe specified rim diameter, D, for the appropriate nominal rim diameter code and the hump circumf
26、erences are given in Table 4.Table 4 Specified rim diameter and hump circumference of 5 tapered (drop-centre) rimsDimensions in millimetresNominal rim diameter codeSpecified rim diameteraHump circumferenceD 04,Flat hump Round humpbDF350,DH300,16 405,6 1 274,2 1 276,4aThe tolerance for the specified
27、rim diameter is for tyre design purposes only. The rim measurement is by a circumference-measuring tape related to a mandrel.bFor round humps on the vehicle inboard side only, a tolerance of 500,is also permitted.5.4 Valve holes5.4.1 Valve hole edges on the tyre side of rim shall be rounded or chamf
28、ered.5.4.2 Valve hole edges on the weather (external) side of the rim shall be free from any burrs that could damage the valve.5.4.3 To provide for adequate sealing, an unbroken, smooth inside surface having at least 0,75 mm or 25 % of rim thickness, whichever is greater, shall be maintained.5.4.4 S
29、uitable valves shall be used. Valve hole details for snap-in valves shall be as shown in Figures 3 and 4. NOTE Holes for other valves are under consideration for a future revision of this part of ISO 4209.4 ISO 2012 All rights reservedBS ISO 4209-2:2012ISO 4209-2:2012(E)Dimensions in millimetresFigu
30、re 3 Valve hole dimensions ISO 2012 All rights reserved 5BS ISO 4209-2:2012ISO 4209-2:2012(E)Dimensions in millimetresaFlat surface with no radial striations.bFlat surface for clamp-in valves.Figure 4 Optional flat surface around valve hole6 15 tapered (drop-centre) rims6.1 Rim contoursThe dimension
31、s and tolerances of rims shall be as given in Figure 5 and Tables 5 and 6.Dimensions in millimetresaTyre-mounting side.bBreak corner equivalent to 0,5 mm minimum radius.cThese dimensions comprise the minimum well envelope for tyre-mounting purposes.Figure 5 Dimensions of 15 tapered (drop-centre) rim
32、 contours6 ISO 2012 All rights reservedBS ISO 4209-2:2012ISO 4209-2:2012(E)Table 5 Dimensions of 15tapered (drop-centre) rim contours for nominal rim width codes 9.75Dimensions in millimetresRim size designationA Hah LaMaP3,5 min. min. min. max. min.17.5 5.25133,52474552519.5 5.25 27 5622.5 5.25 30
33、8 5717.5 6.00152,5248,5 116017.5 6.00 HC 30 63 3019.5 6.00 27 62 30b19.5 6.00 RW 24 9 19 56 2522.5 6.00 30 8.51163 3017.5 6.75171,524962c2517.5 6.75 HC 301470 3219.5 6.75 27 64 30b19.5 6.75 RW 24 19 56 2522.5 6.75 301466c3217.5 7.50190,524 9.5 65c2517.5 7.50 HC 30 102174 3419.5 7.50 279.5673019.5 7.
34、50 RW 25 5822.5 7.5030 1068c3424.5 7.50 70c17.5 8.25209,524 9,5 14 55c2617.5 8.25 HC 30 102874 3619.5 8.25 279.5673019.5 8.25 RW 25 21 5822.5 8.2530102870c3624.5 8.25 72c19.5 9.00228,59,5 68 3022.5 9.001070c3624.5 9.00 72c22.5 9.75 247,5 70caThese dimensions comprise the minimum well envelope for ty
35、re-mounting purposes.bFor light truck application (load index 121 in single mounting), 25 mm may be used. These rims shall be appropriately identified.cLarger dimensions may be used subject to confirmation by tyre-mounting trials. ISO 2012 All rights reserved 7BS ISO 4209-2:2012ISO 4209-2:2012(E)Tab
36、le 6 Dimensions of 15 tapered (drop-centre) rim contours for nominal rim width codes 10.50Dimensions in millimetresRim size designationA Hah LaMaP5,0 min. min. min. max.17.5 10.50266,524 9,5 14 55 2619.5 10.5030103068b3422.5 10.50 70b19.5 11.75298,568b22.5 11.75 70b19.5 12.2531168b22.5 12.25 70b19.5
37、 13.0033068b22.5 13.00 70b19.5 14.00355,568b22.5 14.00 70b19.5 15.003811168b22.5 15.00 70b20.5 16.00406,570b22.5 16.00 70b20.5 18.0045770b22.5 18.00 70baThese dimensions comprise the minimum well envelope for tyre-mounting purposes.bLarger dimensions may be used subject to confirmation by tyre-mount
38、ing trials.6.2 Rim diametersThe nominal rim diameter codes and the specified rim diameters for 15 tapered (drop-centre) rim contours are given in Table 7.Table 7 Nominal rim diameter code and specified rim diameterNominal rim diameter codeSpecified rim diameteraDmm0,417.5 444,519.5 495,320.5 520,722
39、.5 571,524.5 622,3aTolerance is for tyre design purposes only. Rim measurement is by circumference-measuring tape related to a mandrel.8 ISO 2012 All rights reservedBS ISO 4209-2:2012ISO 4209-2:2012(E)6.3 Valve holes6.3.1 GeneralThe dimensions, locations and tolerances of rim holes are given in Figu
40、re 6 and Table 8.a) Side of wellb) Bottom of wellaTyre side.bExternal side.Figure 6 Dimensions of valve holes for 15 tapered rimsTable 8 Dimensions of valve holes for 15 tapered rimsDimensions in millimetresHole diameter min./max.Circular flat diameter min.Rim thickness at circular flat min./max.Loc
41、ation Tyre side External sideV S1S2t9.7/10.0Side of well18 16 5,5/6,016,5 12,5 3/6Bottom of well 18 16 5,5/5,615.7/16.1Side of well 19,3 19,3 4,8/8Bottom of well19,3 19,3 4,8/827 27 3,5/6Consult the valve manufacturer on valves for 9.7/10.0 hole with thickness, t, above 6 mm and for 15.7/16.1 hole w
42、ith t above 8 mm.Circular flats S1and S2are to be parallel within 0,2 mm. ISO 2012 All rights reserved 9BS ISO 4209-2:2012ISO 4209-2:2012(E)6.3.2 Characteristics of valve holes6.3.2.1 The edges of the holes on the tyre side of the rim shall be rounded or chamfered.6.3.2.2 The edges of the holes on t
43、he external side of the rim shall be free from any burrs that could damage the valve.6.3.2.3 To provide for adequate sealing for tubeless tyre rim valves, an unbroken, smooth inside surface of holes having at least 25 % of rim thickness shall be maintained. See Figure 7.aTyre side.bExternal side.cSe
44、e 6.3.2.1.dSee 6.3.2.2.eSee 6.3.2.3.fSee 6.3.2.4.Figure 7 Valve holes6.3.2.4 Holes shall be round within established diameter limits measured in any direction for applications above 300 kPa.6.3.2.5 A concentric circular flat is mandatory to provide a flat surface for valves to seat properly in appli
45、cations above 300 kPa.6.3.2.6 For clamp-in type valves, the angle of circular flat is to be such as to position the valve to make the tip end accessible for inflating and checking inflation pressure in dual assemblies with current servicing equipment in the field.10 ISO 2012 All rights reservedBS IS
46、O 4209-2:2012ISO 4209-2:2012(E)Bibliography1 ISO 4209-1, Truck and bus tyres and rims (metric series) Part 1: Tyres ISO 2012 All rights reserved 11BS ISO 4209-2:2012ISO 4209-2:2012(E) ISO 2012 All rights reservedICS 43.040.50Price based on 11 pagesThis page deliberately left blankBSI is the independ
47、ent national body responsible for preparing British Standards and other standards-related publications, information and services. It presents the UK view on standards in Europe and at the international level. BSI is incorporated by Royal Charter. British Standards and other standardisation products
48、are published by BSI Standards Limited.British Standards Institution (BSI)raising standards worldwideBSI389 Chiswick High Road London W4 4AL UKTel +44 (0)20 8996 9001Fax +44 (0)20 8996 Standards and PASs are periodically updated by amendment or revision. Users of British Standards and PASs should m
49、ake sure that they possess the latest amendments or editions.It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using British Standards would inform the Secretary of the technical committee responsible, the identity
