1、BSI Standards PublicationBS ISO 19259:2015Plain bearings Bearings withembedded solid lubricantsBS ISO 19259:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 19259:2015.The UK participation in its preparation was entrusted to Technical Committee MCE/12, Plai
2、n bearings.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 2015. Published b
3、y BSI Standards Limited 2015ISBN 978 0 580 85256 5 ICS 21.100.10 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 2015.Amendments/corrigenda issued s
4、ince publicationDate T e x t a f f e c t e dBS ISO 19259:2015 ISO 2015Plain bearings Bearings with embedded solid lubricantsPaliers lisses Paliers avec lubrifiants solide incorporINTERNATIONAL STANDARDISO19259First edition2015-10-01Reference numberISO 19259:2015(E)BS ISO 19259:2015ISO 19259:2015(E)i
5、i ISO 2015 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2015, Published in SwitzerlandAll rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
6、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 the country of the requester.ISO copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749
7、 09 47copyrightiso.orgwww.iso.orgBS ISO 19259:2015ISO 19259:2015(E)Foreword iv1 Scope . 12 Normative references 13 Characteristics 13.1 Structure . 13.2 Friction and wear characteristics . 23.3 Applicable field . 34 Material 44.1 Metallic base body 44.1.1 Copper alloy castings . 44.1.2 Grey cast iro
8、ns . 44.2 Solid lubricant 54.3 Combination of metallic base body and solid lubricant 55 Dimensions . 66 Assembling . 97 Surface finish 9Annex A (informative) Guide for selection of a bearing with embedded solid lubricants 10Annex B (informative) Actual applications of a bearing with embedded solid l
9、ubricants .11Bibliography .12 ISO 2015 All rights reserved iiiContents PageBS ISO 19259:2015ISO 19259:2015(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 n
10、ormally carried out through ISO technical 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 i
11、n the work. ISO collaborates closely with the International Electrotechnical Commission (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
12、the different approval criteria needed for the different types of ISO documents 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 doc
13、ument may be the subject of patent rights. ISO shall not be held responsible 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.o
14、rg/patents).Any trade name used in this document is information given for the 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 p
15、rinciples in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information.The committee responsible for this document is ISO/TC 123, Plain bearings, Subcommittee SC 7, Special types of plain bearings.iv ISO 2015 All rights reservedBS ISO 19259:2015INTERNATIONAL S
16、TANDARD ISO 19259:2015(E)Plain bearings Bearings with embedded solid lubricants1 ScopeThis International Standard specifies a bearing with embedded solid lubricants which has been widely used as a solid lubricant bearing.2 Normative referencesThe following documents, in whole or in part, are normati
17、vely 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.ISO 185, Grey cast irons Classification3 Characteristics3.1 Struc
18、tureA bearing with embedded solid lubricants is composed of a metallic base body supporting a load and a solid lubricant embedded in holes or hollows formed on the surface of the metallic base body giving lubricity. As to the embedded state of a solid lubricant, there is a plug type and a spiral typ
19、e (refer to Figure 1).As for hole type, there are “through” or perforated ones and “bottomed” ones (refer to Figure 2).This International Standard specifies a type which is most common and has been widely used where a solid lubricant of a plug type is embedded in through holes. The International Sta
20、ndard also specifies a cylindrical bush and a flanged bush (refer to Figure 3).a) Plug type b) Spiral typeFigure 1 Embedded state of solid lubricants on cylindrical bush ISO 2015 All rights reserved 1BS ISO 19259:2015ISO 19259:2015(E)a) Through hole type b) Bottomed hole typeKey1 metallic base body2
21、 hole3 solid lubricant plugFigure 2 Structure of cross section on a bearing with embedded solid lubricantsa) Cylindrical bush b) Flanged bushFigure 3 Overview of a bearing with embedded solid lubricants (plug type)3.2 Friction and wear characteristicsA bearing with embedded solid lubricants falls un
22、der the category of a solid lubricant bearing among self-lubricating bearings. In the solid lubricant bearings, there is a solid type, a coated type, a dispersed type, and an embedded type.A solid type is such where a solid lubricant powder is solidified using pitch, resin or the like as a binder.A
23、coated type is such where a solid lubricant film is formed on a sliding surface by chemical or physical means such as coating, baking, chemical reaction, or the like.A dispersed type is such where a solid lubricant powder (fine particles) is dispersed into sintered metal matrix or the like.2 ISO 201
24、5 All rights reservedBS ISO 19259:2015ISO 19259:2015(E)An embedded type is such as mentioned above where holes or hollows are formed on a sliding surface of a metallic base body and solid lubricants are embedded therein and, since the load is supported by a metallic base body, this type has excellen
25、t load carrying capacity.The embedded solid lubricant supplies solid lubricant to the sliding surface and, when it slides on the mating member, the solid lubricant is properly drawn out and spread over both sliding surfaces whereupon a solid lubricant film is formed.Further, even when the film is br
26、oken, the embedded solid lubricant is drawn out by friction onto the sliding surfaces, so it repairs the film on the sliding surfaces whereby the lubrication is made possible for long periods and long life is achieved (refer to Figure 4).Since the types of metallic base body and solid lubricant can
27、be appropriately selected depending upon the operating conditions, a wide range of applications is possible. Moreover, bearings ranging from small to large sizes can be manufactured.1234AKey1 metallic base body2 mating member3 embedded solid lubricant4 solid lubricant filmA sliding directionFigure 4
28、 Lubricating mechanism of a bearing with embedded solid lubricants3.3 Applicable fieldThe bearing can be used for rotational motion, reciprocating motion, oscillating motion, and frequent start/stop cycles. The bearing is also used in such applications where no fluid lubrication can be expected beca
29、use of high load and low speed operation, and where the environment temperature is high.Principally, the bearing can be used without supplying oil or grease. However, depending upon the actual operating conditions, oil or grease may be supplied for a purpose of enhancement of durability, removal of
30、wear particulate or dust, and prevention of corrosion of the mating member. ISO 2015 All rights reserved 3BS ISO 19259:2015ISO 19259:2015(E)4 Material4.1 Metallic base bodyPrincipal materials used as a metallic base body in which the solid lubricant is embedded include high strength cast brass, cast
31、 bronze, cast aluminium bronze, and grey cast iron.4.1.1 Copper alloy castingsChemical compositions of copper alloy castings used as the metallic base body are shown in Table 1.Table 1 Chemical composition of copper alloy castings for a bearing with embedded solid lubricantsChemical elementChemical
32、composition mass fraction, %High strength brass CuZn25Al6Mn4Fe3Bronze I CuSn10Zn2Bronze II CuPb5Sn5Zn5Aluminium bronze CuAl10Fe5Ni5ComponentsCu 60,0 to 65,0 86,5 to 89,5 83,0 to 87,0 78,0 to 85,0Sn 9,0 to 11,0 4,0 to 6,0Pb 4,0 to 6,0Zn 22,0 to 28,0 1,0 to 3,0 4,0 to 6,0Fe 2,0 to 4,0 3,0 to 6,0Ni 3,0
33、 to 6,0Al 5,0 to 7,5 8,5 to 10,5Mn 2,5 to 5,0 0,1 to 1,5ImpuritySn 0,2 0,1Pb 0,2 1,0 0,1Zn 0,5Fe 0,2 0,3Sb 0,2 0,2Ni 0,5 1,0 1,0P 0,05a0,05aAl 0,01 0,01Si 0,1 0,01 0,01aFor permanent mould castings, centrifugal castings using mould and continuous castings, phosphorus content shall be 0,5 % maximum.4
34、.1.2 Grey cast ironsGrey cast irons used as the metallic base body should conform to ISO 185.4 ISO 2015 All rights reservedBS ISO 19259:2015ISO 19259:2015(E)4.2 Solid lubricantTable 2 shows outlines of the application and the operating temperature of solid lubricants of a graphite-base type and a fl
35、uororesin-base type which are representative ones of the solid lubricant to be embedded in the metallic base body. Besides those, there are sulfide-base type such as molybdenum disulfide and tungsten disulfide used under special and extreme circumstances. Each of them is used as sole component or as
36、 a mixed component with other additives. The additives compounded with each of those types are specified by manufacturers.Table 2 Types of solid lubricants and their applicationsType ApplicationsOperating temperature CGraphite-baseGeneral-purpose use High temperature use40 to 400Fluororesin-baseGene
37、ral-purpose use Underwater use40 to 80Generally, a solid lubricant plug is formed in such a manner that the solid lubricant powder comprising the single component or the multiple components is moulded by heating under pressure, for example, by means of injection moulding. The resulting solid lubrica
38、nt plugs are generally fixed with adhesive into holes in a cylindrical part of the metallic base body. In some cases, they are fixed by means of press fitting. They may also be fixed by injecting a solid lubricant composition having fluidity into a hole, followed by a solidification process.4.3 Comb
39、ination of metallic base body and solid lubricantSince various selections are available for a combination of a metallic base body and a solid lubricant, it is possible to cope with very wide range of applications.It is important that the metallic base body and the solid lubricant combination are sel
40、ected to suit the operating conditions. It is also necessary to consider the pattern of the solid lubricant holes on the sliding surface depending upon the motion mode and the environmental conditions.Table 3 shows a typical combination of metallic base body and solid lubricant together with their a
41、pplications. Further, a guide for the selection of bearings and examples of actual applications of a bearing with embedded solid lubricants are shown in Figure A.1 and in Table B.1.Table 3 Typical combination of metallic base body and solid lubricantMetallic base body Solid lubricants ApplicationsHi
42、gh-strength brassGraphite-baseGeneral use for average conditions Applicable for high loadFluororesin-base In freshwaterBronze Graphite-baseConformability with mating member Medium loadAluminium bronzeGraphite-baseHigh temperature Medium loadFluororesin-base In seawaterGrey cast iron Graphite-baseHig
43、h temperature Low load ISO 2015 All rights reserved 5BS ISO 19259:2015ISO 19259:2015(E)5 DimensionsThe wall thickness of the bearing with embedded solid lubricants cannot be too thin or the solid lubricant will not be firmly held. So an appropriate thickness is necessary.Figure 5 shows cylindrical a
44、nd flanged bushes. Table 4 shows the preferred nominal dimensions of inside and outside diameters and bush width for cylindrical bushes. Table 5 shows the preferred nominal dimensions for flanged bushes, including flange diameter and flange thickness. Both Table 4 and Table 5 are based on a metallic
45、 base body made of high strength cast brass and graphite-based solid lubricant plugs.Other material combinations with a metallic base body and solid lubricant plugs shall also be in accordance with Table 4 and Table 5. Bearings of sizes outside those shown in Table 4 and Table 5 shall be subject to
46、agreement between the supplier and the user.xxg351Dog351DiBg351Dog351Dig351DflxxBBg976la) Cylindrical bush b) Flanged bushKeyx surface roughnessFigure 5 Cylindrical and flanged bush6 ISO 2015 All rights reservedBS ISO 19259:2015ISO 19259:2015(E)Table 4 Preferred nominal dimensions for cylindrical bu
47、shesDimensions in millimetresInside diameter DiOutside diameter DoWidth B-0,3-0,18 12 8 10 1210 14 8 10 12 1512 18 8 10 12 1513 19 10 12 15 2014 20 10 12 15 2015 21 10 12 15 2016 22 10 12 15 20 2518 24 10 12 15 20 2520 28 10 12 15 20 25 3020 30 10 12 15 20 25 3022 32 12 15 20 25 3025 33 12 15 20 25
48、30 3525 35 12 15 20 25 30 3528 38 15 20 25 30 35 4030 38 15 20 25 30 35 4030 40 15 20 25 30 35 4032 42 15 20 25 30 35 4035 45 20 25 30 35 40 5040 50 20 25 30 35 40 50 6040 55 20 25 30 35 40 50 6045 55 25 30 35 40 50 60 7045 60 25 30 35 40 50 60 7050 60 30 35 40 50 60 70 8050 65 30 35 40 50 60 70 805
49、5 70 30 35 40 50 60 70 8060 75 30 35 40 50 60 70 8065 80 35 40 50 60 70 8070 85 35 40 50 60 70 80 10070 90 35 40 50 60 70 80 10075 90 40 50 60 70 80 10075 95 40 50 60 70 80 10080 100 40 50 60 70 80 100 12090 110 50 60 70 80 90 100 120100 120 50 60 70 80 90 100 120 140110 130 50 60 70 80 90 100 120 140120 140 70 80 90 100 120 140130 150 80 100 130140 160 80 100 140 ISO 2015 All rights reserved 7BS ISO 19259:2015ISO 19259:2015(E)Inside diameter DiOutside diameter DoWidth B-0,3-0,1150 170 80 100 150160
