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1、 Reference number ISO 6149-3:2006(E) ISO 2006 INTERNATIONAL STANDARD ISO 6149-3 Second edition 2006-02-15 Connections for hydraulic fluid power and general use Ports and stud ends with ISO 261 metric threads and O-ring sealing Part 3: Dimensions, design, test methods and requirements for light-duty
2、(L series) stud ends Raccordements pour transmissions hydrauliques et applications gnrales Orifices et lments mles filetage mtrique ISO 261 et joint torique Partie 3: Dimensions, conception, mthodes dessai et exigences des lments mles de srie lgre (srie L) ISO 6149-3:2006(E) PDF disclaimer This PDF
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5、-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. ISO 2006 All rights reserved.
6、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 address below or ISOs member body in the country of the requester. I
7、SO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2006 All rights reserved ISO 6149-3:2006(E) ISO 2006 All rights reserved iii Contents Page Foreword iv Introduction v 1 Scope . 1
8、 2 Normative references. 1 3 Terms and definitions. 2 4 Dimensions 2 5 Requirements 2 6 O-rings . 3 7 Test methods. 3 8 Designation of stud ends. 3 9 Identification 3 10 Identification statement (reference to this part of ISO 6149). 3 Bibliography. 10 ISO 6149-3:2006(E) iv ISO 2006 All rights reserv
9、ed 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 normally carried out through ISO technical committees. Each member body interested in a subject for which
10、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 Commission (IEC) on all matt
11、ers 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 International Standards adopted by the technical committees are circul
12、ated 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 be the subject of patent rights. ISO shall not be held responsib
13、le for identifying any or all such patent rights. ISO 6149-3 was prepared by Technical Committee ISO/TC 131, Fluid power systems, Subcommittee SC 4, Connectors and similar products and components. This second edition cancels and replaces the first edition (ISO 6149-3:1993), which has been technicall
14、y revised. ISO 6149 consists of the following parts, under the general title Connections for hydraulic fluid power and general use Ports and stud ends with ISO 261 metric threads and O-ring sealing: Part 1: Ports with truncated housing for O-ring seal Part 2: Dimensions, design, test methods and req
15、uirements for heavy-duty (S series) stud ends Part 3: Dimensions, design, test methods and requirements for light-duty (L series) stud ends Part 4: Dimensions, design, test methods and requirements of external and internal hexport plugs ISO 6149-3:2006(E) ISO 2006 All rights reserved v Introduction
16、In hydraulic fluid power systems, power is transmitted and controlled through a liquid under pressure within an enclosed circuit. In general applications, a fluid (liquid or gas) may be conveyed under pressure. Components are connected through their threaded ports by stud ends on fluid conductor con
17、nectors to tubes and pipes or to hose connectors and hoses. For threaded ports and stud ends specified in new designs in hydraulic fluid power applications, ISO/TC 131/SC 4 recommends that the ISO 6149 series be used because these International Standards specify ports and stud ends with metric threa
18、ds and O-ring sealing and because the subcommittee would like to help users by recommending one preferred system. ISO/TC 131/SC 4 further recommends that threaded ports and stud ends in accordance with the ISO 1179 series, ISO 9974 series and ISO 11926 series not be used for new designs in hydraulic
19、 fluid power applications; these International Standards will be maintained because they specify ports and stud ends that are currently used in hydraulic systems worldwide. INTERNATIONAL STANDARD ISO 6149-3:2006(E) ISO 2006 All rights reserved 1 Connections for hydraulic fluid power and general use
20、Ports and stud ends with ISO 261 metric threads and O-ring sealing Part 3: Dimensions, design, test methods and requirements for light-duty (L series) stud ends 1 Scope This part of ISO 6149 specifies dimensions, performance requirements and test procedures for metric adjustable and non-adjustable l
21、ight-duty (L series) stud ends and O-rings. Stud ends in accordance with this part of ISO 6149 may be used at working pressures up to 40 MPa 400 bar1) for non-adjustable stud ends and 31,5 MPa (315 bar) for adjustable stud ends. The permissible working pressure depends upon the stud end size, materi
22、als, design, working conditions, application, etc. Conformance to the dimensional information in this part of ISO 6149 does not guarantee rated performance. Each manufacturer should perform testing according to the specification contained in this part of ISO 6149 to assure that components comply wit
23、h the performance ratings. NOTE 1 A significant number of tests have been conducted to confirm the performance requirements of connection ends made from carbon steel. NOTE 2 This part of ISO 6149 applies to connectors detailed in ISO 8434-1 and ISO 8434-2 (see ISO 12151-4 for related hose fitting sp
24、ecification). NOTE 3 The Introduction of this part of ISO 6149 gives recommendations for ports and stud ends to be used for new designs in hydraulic fluid power applications. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated r
25、eferences, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 48, Rubber, vulcanized or thermoplastic Determination of hardness (hardness between 10 IRHD and 100 IRHD) ISO 261, ISO general purpose metric screw
26、 threads General plan ISO 965-1, ISO general purpose metric screw threads Tolerances Part 1: Principles and basic data ISO 3601-3:2005, Fluid power systems O-rings Part 3: Quality acceptance criteria ISO 4759-1, Tolerances for fasteners Part 1: Bolts, screws, studs and nuts Product grades A, B and C
27、 1) 1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm2. ISO 6149-3:2006(E) 2 ISO 2006 All rights reserved ISO 55982), Fluid power systems and components Vocabulary ISO 6149-2, Connections for hydraulic fluid power and general use Ports and stud ends with ISO 261 metric threads and O-ring sealing Part 2: Dime
28、nsions, design, test methods and requirements for heavy-duty (S series) stud ends ISO 19879, Metallic tube connections for fluid power and general use Test methods for hydraulic fluid power connections 3 Terms and definitions For the purposes of this part of ISO 6149, the terms and definitions given
29、 in ISO 5598 and the following apply. 3.1 adjustable stud end stud end connector that allows for connector orientation through final tightening of the locknut to complete the connection NOTE This type of stud end is typically used on shaped connectors (e.g. tees, crosses and elbows). 3.2 non-adjusta
30、ble stud end stud end connector that does not require specific orientation before final tightening of the connection, because it is only used on straight connectors 4 Dimensions Light-duty (L series) stud ends shall conform to the dimensions given in Figures 1 and 2 and given in Table 1. Hex toleran
31、ces across flats shall be in accordance with ISO 4759-1, product grade C. 5 Requirements 5.1 Working pressure Light-duty (L series) stud ends made of low carbon steel shall be designed for use at the working pressures given in Table 2. 5.2 Performance Light-duty (L series) stud ends made of low carb
32、on steel shall meet or exceed the burst and impulse pressures given in Table 2, when submitted to burst and cyclic endurance (impulse) tests conducted in accordance with Clause 7 and assembled using the torques in Table 5. 5.3 Flatness and fit of adjustable stud end washers The washer shall be clinc
33、hed to the stud end with a tight slip fit to an interference fit. The slip fit shall be tight enough so that the washer cannot be shaken loose to cause it to drop from its uppermost position by its own weight. The locknut torque needed to move the washer at the maximum washer interference fit shall
34、not exceed the torques given in Table 3. 2) To be published. (Revision of 5598:1985) ISO 6149-3:2006(E) ISO 2006 All rights reserved 3 Any washer surface that is out of flatness shall be uniform (i.e. not wavy) and concave with respect to the stud end and shall conform to the allowances given in Tab
35、le 3. 6 O-rings O-rings for use with light-duty (L series) stud ends shall conform to the dimensions shown in Figure 3 and given in Table 4. Unless otherwise specified, for use with petroleum base hydraulic fluids at the pressure and temperature requirements in Clause 5 and Table 2 and for testing,
36、the O-rings shall be made of NBR (nitrile) with a hardness of (90 5) IRHD, measured per ISO 48, and shall conform to the dimensions given in Table 4 and shall meet or exceed the O-ring quality acceptance criteria for grade N of ISO 3601-3. In those cases where the pressure and temperature requiremen
37、ts of this part of ISO 6149 and/or the hydraulic fluid used in the system differ from those specified in Clause 5 and Table 2, the connector manufacturer shall be consulted to ensure that an appropriate O-ring material is selected. 7 Test methods Burst and cyclic endurance (impulse) tests shall be c
38、onducted in accordance with ISO 19879. 8 Designation of stud ends Light-duty (L series) stud ends shall be designated by “Stud end”; reference to this part of ISO 6149; i.e. ISO 6149-3; thread size (d1 P). EXAMPLE A stud end in accordance with this part of ISO 6149, with a thread M18 1,5 is designat
39、ed as follows: Stud end ISO 6149-3 - M18 1,5 9 Identification Light-duty (L series) stud ends shall be identified as shown in Figures 1 and 2 and in accordance with the dimensions given in Table 1. Non-adjustable (straight) stud ends shall be identified by a cylindrical machining of diameter d2 and
40、length L5, adjacent to thread d1, and a notch on diameter d2. Adjustable stud ends shall be identified by only a cylindrical machining of diameter d2 and length L10, on the end of the locknut that is adjacent to the washer. In addition to this identification, for both the non-adjustable and adjustab
41、le stud ends, the manufacturer may mark the stud ends with the word “metric”. 10 Identification statement (reference to this part of ISO 6149) It is strongly recommended to manufacturers who have chosen to conform to this International Standard that the following statement be used in test reports, c
42、atalogues and sales literature: “Light-duty (L series) stud ends conform to ISO 6149-3:2006, Connections for hydraulic fluid power and general use Ports and stud ends with ISO 261 metric threads and O-ring sealing Part 3: Dimensions, design, test methods and requirements for light-duty (L series) st
43、ud ends.” ISO 6149-3:2006(E) 4 ISO 2006 All rights reserved Dimensions in millimetres surface roughness in micrometres Key 1 clinch washer (see 5.3) a Width across flats. b Machining required for identification of metric stud end (see Clause 8). c Chamfer to minor diameter of thread. d Thread. e Pit
44、ch diameter. f For reference only. g Variation. Figure 1 Adjustable light-duty (L series) stud end ISO 6149-3:2006(E) ISO 2006 All rights reserved 5 Dimensions in millimetres surface roughness in micrometres a Width across flats. b Notch of optional shape, centrally located on L5; required for ident
45、ification of metric stud end (see Clause 8). c Chamfer to minor diameter of thread. d Thread. e Pitch diameter. Figure 2 Non-adjustable light-duty (L series) stud end ISO 6149-3:2006(E) 6 ISO 2006 All rights reserved Table 1 Dimensions of light-duty (L series) stud ends Dimensions in millimetres Thr
46、eada d2 d3 d4 d5 d6 d7 L1 L2 L3 L4b L5 L6 L7 L8 L9 L10 s (d1 P) 0,2 nom tol. 0,4 0 0,1 0,4 0 + 0 0,3 0,2 0,2min. 0,2 0,1 0,3 0 + 0,1 0,08 ref. 0,1 M8 1 11,8 3 0,1 12,5 6,4 8,1 6,4 5,5 6 16 8,5 1,6 2 4 0,9 8,6 1,5 12 M10 1 13,8 4,5 0,1 14,5 8,4 10,1 8,4 5,5 6 16 8,5 1,6 2 4 0,9 8,6 1,5 14 M12 1,5 16,
47、8 6 0,1 17,5 9,7 12,1 9,7 7,5 7,5 20 11 2,5 3 4,5 0,9 11,1 2 17 M14 1,5c 18,8 7,5 0,2 19,5 11,7 14,1 11,7 7,5 7,5 20 11 2,5 3 4,5 0,9 11,1 2 19 M16 1,5 21,8 9 0,2 22,5 13,7 16,1 13,7 8 7,5 20,511,52,5 3 4,5 0,9 11,6 2 22 M18 1,5 23,8 11 0,2 24,5 15,7 18,1 15,7 9 7,5 21,512,52,5 3 4,5 0,9 12,6 2,5 24
48、 M22 1,5 26,8 14 0,2 27,5 19,7 22,1 19,7 9 8 22,513 2,5 3 5 1,25 12,8 2,5 27 M27 2 31,8 18 0,2 32,5 24 27,1 24 11 10 27,516 2,5 4 6 1,25 15,8 2,5 32 M30 2 35,8 21 0,2 36,5 27 30,1 27 11 10 27,516 2,5 4 6 1,25 15,8 2,5 36 M33 2 40,8 23 0,2 41,5 30 33,1 30 11 10 27,516 3 4 6 1,25 15,8 3 41 M42 2 49,8
49、30 0,2 50,5 39 42,1 39 11 10 27,516 3 4 6 1,25 15,8 3 50 M48 2 54,8 36 0,3 55,5 45 48,1 45 12,510 29 17,53 4 6 1,25 17,3 3 55 M60 2 64,8 44 0,3 65,5 57 60,1 57 12,510 29 17,53 4 6 1,25 17,8 3 65 a Conforming to ISO 261, tolerance grade 6g in accordance with ISO 965-1. b Optional length for L4 in accordance with ISO 6149-2. c Preferred for diagnostic port applications. ISO 6149-3:20