1、BRITISH STANDARD BS ISO 12128:2001 Plain bearings Lubrication holes, grooves and pockets Dimensions, types, designation and their application to bearing bushes ICS 21.100.10 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS ISO 12128:2001 This British Standard, having been pre
2、pared under the direction of the Engineering Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 8 January 2002 BSI 8 January 2002 ISBN 0 580 38819 0 National foreword This British Standard reproduces verbatim ISO 12128:2001 and i
3、mplements it as the UK national standard. It supesedes BS ISO 12128:1995 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee MCE/12, Plain bearings, which has the responsibility to: A list of organizations represented on this committee can be obtained on
4、request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility
5、of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations
6、. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of page
7、s This document comprises a front cover, an inside front cover, the ISO title page, pages ii and iii, a blank page, pages 1 to 8, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication
8、Amd. No. Date CommentsINTERNATIONAL STANDARD ISO 12128 Second edition 2001-09-15 Reference number ISO 12128:2001(E) Plain bearings Lubrication holes, grooves and pockets Dimensions, types, designation and their application to bearing bushes Paliers lisses Trous, rainures et poches de graissage Dimen
9、sions, types, dsignation et leurs applications dans les baguesISO 12128:2001(E) iiISO 12128:2001(E) iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is norma
10、lly 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 in th
11、e work. ISO collaborates closely 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 3. Draft International Standards adopted by the technic
12、al 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 International Standard may be the subject of patent r
13、ights. ISO shall not be held responsible for identifying any or all such patent rights. International Standard ISO 12128 was prepared by Technical Committee ISO/TC 123, Plain bearings, Subcommittee SC 3, Dimensions, tolerances and construction details. This second edition cancels and replaces the fi
14、rst edition (ISO 12128:1995), which has been technically revised.INTERNATIONAL STANDARD ISO 12128:2001(E) 1 Plain bearings Lubrication holes, grooves and pockets Dimensions, types, designation and their application to bearing bushes 1 Scope This International Standard specifies dimensions for lubric
15、ation holes, grooves and pockets for bearing bushes. These dimensions can be entered, e.g. on drawings, using the designation examples. Their use depends in particular on the specific operating conditions. In addition, it enables the user to assign the different types of lubricant feed and distribut
16、ion to plain bearing bushes made of copper alloys, thermosetting plastics, thermoplastics or of artificial carbon. NOTE Different types of lubricant feed and distribution for plain bearing bushes made of sintered metals have not been specified due to the fact that these bushes are soaked with lubric
17、ant. Plain bearing bushes made of artificial carbon are not lubricated with oil or grease. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendme
18、nts to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest editi
19、on of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 2768-1:1989, General tolerances Part 1: Tolerances for linear and angular dimensions without individual tol- erance indications. ISO 4379:1993, Plain bearings C
20、opper alloy bushes. 3 Dimensions, types and designation 3.1 General The dimensions of the lubrication holes, grooves and pockets are related to the bearing wall thickness . The given diameter shall only serve as an auxiliary dimension. All dimensions are given in millimetres. s d 1ISO 12128:2001(E)
21、2 3.2 Lubrication holes 3.2.1 Dimensions and types See Figure 1 and Table 1. Lubrication holes may be provided in conjunction with lubrication grooves and pockets, or, if the requirement to be met by a lubrication point is less stringent, even without these. 3.2.2 Designation EXAMPLE A lubrication h
22、ole of type A with before diameter , is designated as follows: Lubrication hole ISO 12128 - A3 Figure 1 Lubrication holes Table 1 Dimensions of the lubrication holes 2,5 3 4 5 6 8 10 12 11 , 522 , 53456 Type A 4,5 6 8 10 12 16 20 24 Type B 6 8,2 10,8 13,6 16,2 21,8 27,2 32,6 2 2.5 3 4 5 7,5 10 22 ,
23、53457 , 51 0 nom. d 2 t 1 d 3 s 6 d 1 d 1 6 30 30 6 100 d 1 100 d 2 = 3mmISO 12128:2001(E) 3 3.3 Lubrication grooves 3.3.1 Dimensions and types See Figures 2 and 3 and Tables 2 and 3. Lubrication grooves are mainly provided on plain bearings. Types C, D and E are also used in conjunction with type H
24、 (circumferential groove), predominantly on plain bearings made of non-ferrous metal, steel, cast iron or plastics, types F and G predominantly on plain bearings made from artificial carbon. Type J is a narrow blended groove principally for use with grease lubrication. In order to facilitate machini
25、ng and avoid burrs, all sharp corners may have a small break edge or radius. NOTE In order to facilitate manufacture, the dimension of the bearing thickness remaining at the base of the groove may be specified on the drawing as the control dimension. Figure 2 Lubrication groovesISO 12128:2001(E) 4 3
26、.3.2 Designation EXAMPLE A lubrication groove of type D with groove depth , is designated as follows: Lubrication groove ISO 12128 - D0,8 Table 2 Dimensions of lubrication grooves Ty p e Ty p e Ty p e Ty p e Ty p e Ty p e Ty p e Ty p e Cto J D ,E J G H C D F J C J J J CtoH J 0 , 4331 , 231 , 51 , 51
27、11 , 511 , 5 1 1 6 0,6 4 4 1,6 3 1,5 1,5 1 1,5 2 1,5 2,1 1 1,5 20 0,8 5 5 1,8 3 1,5 2,5 1 1,5 3 1,5 2,2 1,5 2 30 18624241 , 524 , 522 , 8 22 , 5 4 0 1 , 21 0 , 562 , 552 , 5622622 , 6 2 , 53 4 0 1,6 14 7 3,5 6 3 8 3 2,5 9 2,5 3 3 4 50 2 19 8 4,5 8 4 12 4 2,5 12 2,5 26 4 5 60 2,5 28 8 7,5 10 5 20 5 3
28、 15 3 2,8 5 7,5 70 3,2 38 11 12 7 28 7 21 7,5 10 44 91 41 593 592 71 0 a Rounded Figure 3 Lubrication grooves with closed ends Table 3 Dimensions for distance nom. 3461 0 t 2 e 1 e 2 r 1 r 2 y s d 1 6 28 d 1 6 30 25 25 22 22 d 1 6 100 20 20 20 d 1 100 a b 15 6 b 6 30 30100 a t 2 = 0,8 mmISO 12128:20
29、01(E) 5 3.4 Lubrication pockets 3.4.1 Dimensions and types See Figure 4 and Table 4. Lubrication pockets shall in general be provided in cases where larger lubrication spaces are required. Type K shall predominantly be used for plain slideways with a to-and-fro movement in a straight line. 3.4.2 Des
30、ignation EXAMPLE A lubrication pocket of type K with pocket depth , is designated as follows: Lubrication pocket ISO 12128 - K2,5 3.5 Design Permissible deviations without tolerance indications shall be in accordance with tolerance class “c” specified in ISO 2768-1. The edges shall be chamfered to o
31、r rounded. Sharp-edged transitions to the sliding surface shall be avoided. Lubrication holes, grooves and pockets should not be arranged in the stressed zone of the plain bearing. With the exception of plain bearings made from artificial carbon, lubrication grooves and pockets shall in general not
32、be made over the whole length of the bearing. The shape of the groove or pocket runout shall be left to the manufacturers discretion. NOTE When producing lubrication grooves and pockets in plain bearings from tough and hard materials, chatter marks may occur on the bottom of the groove, which do not
33、 impair the operation of the plain bearing. Lubrication holes, grooves and pockets are not provided on plain bearings made from sintered metal, since these are soaked with lubricant. Figure 4 Lubrication pocket Table 4 Dimensions of the lubrication pockets 1,6 6 8 1,8 6,5 2,5 8 15 2,8 14 41 02 44 ,
34、52 0 61 23 56 , 33 0 t 2 d 2 e 1 e 2 r 2 t 2 = 2,5 mm 0,5 max.ISO 12128:2001(E) 6 4 Lubrication holes, grooves and pockets on bearing bushes (see Table 5) The dimensions and types of the lubrication holes, grooves and pockets on bearing bushes in accordance with this International Standard are given
35、 in 3.2 to 3.4. Examples for the designation of bearing bushes without lubrication holes, grooves and pockets are to be taken from the relevant standards on dimensions. The symbol represents, in the ISO designation, the required distance from the insert side, unless ; the symbol represents the requi
36、red dimension for the groove pitch, which is from up to . If two lubrication holes and grooves are provided, they shall be located at to each other, if there are three at and four at to each other. Only one type and one bush form are illustrated and designated, each with freely chosen values for the
37、 dimensions and . 5 Examples of the designation of bushes with lubrication holes and/or grooves Bush made of CuSn8P accordance with ISO 4379, with two lubrication holes of type L (2L) corre- sponding to bush A of this International Standard, off-centre, with distance is designated as follows. Bus hI
38、SO4 3 79-C20x24x2 0Y-A2L 6-CuS n8P Same bush but with two longitudinal grooves of type D (2D) corresponding to bush type C of this International Standard is designated as follows. Bush ISO 4379 - C 20 x 24 x 20 Y - A2L62D - CuSn8P Bush made of CuSn8P accordance with ISO 4379, with three longitudinal
39、 grooves of type D (3D) corresponding to bush type C of this International Standard, in conjunction with one circumferential groove of type H (1H) corresponding to bush of type E of this International Standard, off-centre, with distance is designated as follows. Bus hISO4 3 79-C20x24x2 0Y-C3DE 1H6-C
40、uSn 8P x x =b=2 h 0,1b 1b 180 120 90 xh C20 24 20 Y x = 6mm C20 24 20 Y x = 6mmISO 12128:2001(E) 7 Table 5 Types of bearing bush Lubrication holes and grooves Bush type Type accordance with clause 3 Type and application Bearing bush material A A B L Lubrication hole, in-centre or off-centre Copper a
41、lloys Thermosetting plastics Thermoplastics C C D E J Longitudinal groove closed at both ends Copper alloys Thermosetting plastics Thermoplastics E G H Circumferential groove, in-centre or off-centre Copper alloys Thermosetting plastics Thermoplastics Artificial carbon G C D E J Longitudinal groove
42、open at the end opposite the insert side Copper alloys Thermosetting plastics Thermoplastics H C D E J Longitudinal groove open at the end towards the insert side Copper alloys Thermosetting plastics ThermoplasticsISO 12128:2001(E) 8 J C D E F J Longitudinal groove open at both ends Copper alloys Ar
43、tificial carbon K C F J Helical groove, right-hand thread Copper alloys Artificial carbon L C F J Helical groove, left-hand thread Copper alloys Artificial carbon M C J Octagonal groove Copper alloys Thermosetting plastics Thermoplastics N C J Oval groove Copper alloys Thermosetting plastics Thermop
44、lastics Table 5 Types of bearing bush (continued) Lubrication holes and grooves Bush type Type accordance with clause 3 Type and application Bearing bush materialBS ISO 12128:2001 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsi
45、ble for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendmen
46、ts 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 this British Standard would inform the Secretary of the technical committee responsible, the identity of which can be found
47、 on the inside front cover. Tel: +44 (0)20 8996 9000. Fax: +44 (0)20 8996 7400. BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards. Buying standards Orders for all BSI, international and foreign standard
48、s publications should be addressed to Customer Services. Tel: +44 (0)20 8996 9001. Fax: +44 (0)20 8996 7001. Email: ordersbsi-. Standards are also available from the BSI website at http:/www.bsi-. In response to orders for international standards, it is BSI policy to supply the BSI implementation of
49、 those that have been published as British Standards, unless otherwise requested. Information on standards BSI provides a wide range of information on national, European and international standards through its Library and its Technical Help to Exporters Service. Various BSI electronic information services are also available which give details on all its products and services. Contact the Information Centre. Tel: +44 (0)20 8996 7111. Fax: +44 (0)20 8996 7048. Email: inf
