1、BSI Standards PublicationBS ISO 6550-4:2014Incorporating corrigendum August 2015BS ISO 6550-4:2014Road vehicles Sheath-type glow-plugs with conicalseating and their cylinder headhousingPart 4: M8 x 1 glow-plugsBS ISO 6550-4:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implem
2、entation of ISO 6550-4:2014. Together with BS ISO 17747-1:2015, BS ISO 17747-2:2015 and BS ISO 17747-3:2015, it supersedes BS ISO 6550-4:2009 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee MCE/22, Engines for road vehicles.A list of organizations repr
3、esented 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 2015. Published by BSI Standards Limited 2015ISBN 978 0
4、580 90562 9ICS 43.060.50Compliance 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 May 2014.Amendments/corrigenda issued since publicationDate Text affected31 August 201
5、5 Implementation of corrigendum August 2015: supersession information correctedBS ISO 6550-4:2014 ISO 2014Road vehicles Sheath-type glow-plugs with conical seating and their cylinder head housing Part 4: M8 x 1 glow-plugsVhicules routiers Bougies de prchauffage fourreau et sige conique, et leur loge
6、ment dans la culasse Partie 4: Bougies M8 x 1INTERNATIONAL STANDARDISO6550-4Third edition2014-05-01Reference numberISO 6550-4:2014(E)BS ISO 6550-4:2014ISO 6550-4:2014(E)ii ISO 2014 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2014All rights reserved. Unless otherwise specified, no part of thi
7、s publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in th
8、e 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 6550-4:2014ISO 6550-4:2014(E) ISO 2014 All rights reserved iiiContents PageForeword iv1 Scope . 12 Normative
9、 references 13 Dimensions and tolerances . 13.1 General . 13.2 Glow-plugs 13.3 Cylinder head housing 53.4 Threads 63.5 Dimension limits of threads M8 1 64 Installation tightening torque 7Annex A (informative) M8 1 glow-plugs with 10 mm hexagon and their cylinder head housing . 8Bibliography .10BS IS
10、O 6550-4:2014ISO 6550-4:2014(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 technical committees. Each member body interes
11、ted 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 with the International Electrotechnical C
12、ommission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO document
13、s should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives). Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible
14、for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents). Any trade name used in this document is information given for th
15、e convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Fo
16、reword - Supplementary informationThe committee responsible for this document is ISO/TC 22, Road vehicles, Subcommittee SC 1, Ignition equipment.This third edition cancels and replaces the second edition (ISO 6550-4:2009) of which it constitutes a minor revision.ISO 6550 consists of the following pa
17、rts, under the general title Road vehicles Sheath-type glow-plugs with conical seating and their cylinder head housing: Part 1: M14 1,25 glow-plugs Part 2: M12 1,25 glow-plugs Part 3: M10 glow-plugs Part 4: M8 1 glow-plugsiv ISO 2014 All rights reservedBS ISO 6550-4:2014INTERNATIONAL STANDARD ISO 65
18、50-4:2014(E)Road vehicles Sheath-type glow-plugs with conical seating and their cylinder head housing Part 4: M8 x 1 glow-plugs1 ScopeThis part of ISO 6550 specifies the main characteristics of M8 1 sheath-type glow-plugs with conical seating and their cylinder head housing, for use with diesel (com
19、pression-ignition) engines.2 Normative referencesThe 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 doc
20、ument (including any amendments) applies.ISO 68-1, ISO general purpose screw threads Basic profile Part 1: Metric screw threadsISO 261, ISO general purpose metric screw threads General planISO 965-1, ISO general purpose metric screw threads Tolerances Part 1: Principles and basic dataISO 965-3, ISO
21、general purpose metric screw threads Tolerances Part 3: Deviations for constructional screw threadsISO 2768-2:1989, General tolerances Part 2: Geometrical tolerances for features without individual tolerance indicationsISO 8092-4:1997, Road vehicles Connections for on-board electrical wiring harness
22、es Part 4: Pins for single- and multi-pole connections Dimensions and specific requirements3 Dimensions and tolerances3.1 GeneralUnless otherwise specified, the general geometric tolerances in accordance with ISO 2768-2:1989, tolerance class H, apply.3.2 Glow-plugsSheath-type glow-plug dimensions an
23、d tolerances shall be as shown in Figures 1 to 6, and Tables 1 and 2. ISO 2014 All rights reserved 1BS ISO 6550-4:2014ISO 6550-4:2014(E)Dimensions in millimetresKeyaMajor diameter, in accordance with ISO 965-1 or 965-3.bSee Figure 2.cHexagon.Figure 1 Glow-plug with pin terminalDimensions in millimet
24、resFigure 2 Detail of X of Figure 12 ISO 2014 All rights reservedBS ISO 6550-4:2014ISO 6550-4:2014(E)Dimensions in millimetresKeyaContour agreed between glow-plug and engine manufacturer.bHexagon.Figure 3 Glow-plug pin terminalDimensions in millimetresKeyaHexagon.Figure 4 Glow-plug threaded terminal
25、 ISO 2014 All rights reserved 3BS ISO 6550-4:2014ISO 6550-4:2014(E)Dimensions in millimetresKey1 pin ISO 8092-4:1997 Table 1, pin size 4Figure 5 Optional glow-plug pin terminalDimensions in millimetresKey1 glow-plug type A2, A4, A6, A8, B2, B4, B6 and B82 glow-plug type A1, A3, A5, A7, B1, B3, B5 an
26、d B7aContour optional.Figure 6 Reduced tip end and cone endTable 1 Glow-plug dimensions (dimension l1and l2)Dimensions in millimetresl1a 0,5 27 42 57 67 72 87 102l2a 0,5 20 25 28 30 35aDimensions l1and l2to be combined as appropriate. Bold numbers are to be preferred.4 ISO 2014 All rights reservedBS
27、 ISO 6550-4:2014ISO 6550-4:2014(E)Table 2 Glow-plug dimensionsDimensions in millimetresType TerminalHexagon Body Glow-plug tubes emin.k 2d2d3ref.l3min.d40,2d50,1amin.A1pin8,0h13 8,6 75031,9367030,6,0 104,0 A2 3,3 5A34,4 A4 3,5 5A5M44,0 A6 3,3 5A74,4 A8 3,5 5B1pin1234,0 B2 3,3 5B34,4 B4 3,5 5B5M44,0
28、B6 3,3 5B74,4 B8 3,5 53.3 Cylinder head housingThe dimensions and tolerances of the cylinder head housing for sheath-type glow-plugs shall be as given in Figure 7 and Table 3. ISO 2014 All rights reserved 5BS ISO 6550-4:2014ISO 6550-4:2014(E)Dimensions in millimetresKeyaPitch diameter in accordance
29、with ISO 965-1 or 965-3. 90 1 or 120 1Figure 7 Cylinder head housing for 8 mm hexagonTable 3 Cylinder head housing dimensionsDimensions in millimetresl3max. 22 37 52 62 67 82 97l1a27 42 57 67 72 87 102l4To be specified by the engine manufacturer.al3max. for cylinder head has to correspond to l1of th
30、e glow plug as in this table.3.4 ThreadsThe threads of M8 1 glow-plug and the corresponding tapped hole in cylinder head shall be in accordance with ISO 68-1, ISO 261, ISO 965-1, and ISO 965-3.The thread M8 1 - 6g shall be used for the glow-plugs.The threads in the corresponding tapped holes in the
31、cylinder heads shall be M8 1 - 6H.3.5 Dimension limits of threads M8 1Dimension limits of threads M8 1 are given in Table 4.6 ISO 2014 All rights reservedBS ISO 6550-4:2014ISO 6550-4:2014(E)Table 4 Dimension limits of threads M8 1Dimensions in millimetresDimensionsPlug thread M8 - 6g (on finished pl
32、ug)Tapped hole in cylinder head M8 1 6HMajor diametermax. 7,974 not specifiedmin. 7,794 8,000Pitch diametermax. 7,324 7,500min. 7,212 7,350Minor diametermax. 6,747 7,153min. 6,596a6,917aWith a root radius of fillet 0,100 mm (0,1 P).4 Installation tightening torqueThe installation torque values shall
33、 be 9 Nm to 12 Nm. These values apply to unused nickel or zinc plated sheath-type glow-plugs without lubricant on the threads.If glow-plugs are plated with a different material and/or the threads are lubricated the applicable torque values shall be agreed between the glow-plug manufacturer and the e
34、ngine manufacturer.When the installation deformation by cylinder head housing material and by glow-plug plating is big, consultation should be held between glow-plug manufacturers and engine manufacturers. ISO 2014 All rights reserved 7BS ISO 6550-4:2014ISO 6550-4:2014(E)Annex A (informative) M8 1 g
35、low-plugs with 10 mm hexagon and their cylinder head housingDimensions in millimetresKeyaMajor diameter, in accordance with ISO 965-1 and 965-3.bHexagon.Figure A.1 Glow-plugs with threaded terminal and 10 mm hexagonDimensions in millimetresFigure A.2 Glow-plug tip with reduced cylinder8 ISO 2014 All
36、 rights reservedBS ISO 6550-4:2014ISO 6550-4:2014(E)Dimensions in millimetresKeyaPitch diameter, in accordance with ISO 965-1 and 965-3.Figure A.3 Cylinder head housing dimensions ISO 2014 All rights reserved 9BS ISO 6550-4:2014ISO 6550-4:2014(E)Bibliography1 ISO 1101; Geometrical Product Specificat
37、ions (GPS) General tolerancing Tolerances of form, orientation, location and run-out10 ISO 2014 All rights reservedBS ISO 6550-4:2014BS ISO 6550-4:2014ISO 6550-4:2014(E) ISO 2014 All rights reservedICS 43.060.50Price based on 10 pagesThis page deliberately left blankBSI is the national body responsi
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