1、BS ISO 1501:2009ICS 21.040.30NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDISO miniature screw threadsThis British Standardwas published under theauthority of the StandardsPolicy and StrategyCommittee on 31 July 2009 BSI 2009ISBN 978 0 580 62327 1Amendments/co
2、rrigenda issued since publicationDate CommentsBS ISO 1501:2009National forewordThis British Standard is the UK implementation of ISO 1501:2009.The UK participation in its preparation was entrusted to TechnicalCommittee FME/9, Fastners.A list of organizations represented on this committee can be obta
3、ined onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunityfrom legal obligations.BS ISO 1501:2009Reference numberISO 1501:2009(E)IS
4、O 2009INTERNATIONAL STANDARD ISO1501First edition2009-05-15ISO miniature screw threads Filetages miniatures ISO BS ISO 1501:2009ISO 1501:2009(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not b
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9、ail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2009 All rights reservedBS ISO 1501:2009ISO 1501:2009(E) ISO 2009 All rights reserved iiiContents Page Foreword iv 1 Scope . 1 2 Normative references . 1 3 Terms and definitions. 1 4 Symbols . 1 5 Profiles. 2 5.1 Basic profile 2 5.
10、2 Design profile 3 6 Diameter-pitch combinations and basic dimensions . 3 7 Tolerances . 4 7.1 Tolerance position 4 7.2 Tolerance grades 4 7.3 Grade-position combinations and tolerance zones 5 8 Designation . 8 9 Limits of size . 8 10 Inspection 10 Annex A (normative) ISO miniature screw threads wit
11、h nominal diameters from 1 mm to 1,4 mm . 11 Annex B (informative) Inspection . 14 Annex C (informative) Differences between the ISO International Standards and those of some countries concerning miniature screw threads. 15 BS ISO 1501:2009ISO 1501:2009(E) iv ISO 2009 All rights reservedForeword ISO
12、 (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 a technical com
13、mittee 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 matters of electrot
14、echnical 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 circulated to the mem
15、ber 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 responsible for identify
16、ing any or all such patent rights. ISO 1501 was prepared by Technical Committee ISO/TC 1, Screw threads. This first edition of ISO 1501 is a technical revision of ISO/R 1501:1970, which was cancelled in 1998. BS ISO 1501:2009INTERNATIONAL STANDARD ISO 1501:2009(E) ISO 2009 All rights reserved 1ISO m
17、iniature screw threads 1 Scope This International Standard specifies the profiles, diameter-pitch combinations, basic dimensions, tolerances, limits of size and designation for ISO miniature screw threads with nominal diameters from 0,3 mm to 1,4 mm. These threads are applicable to timepieces, optic
18、al instruments, electrical meters, measuring instruments, etc. The profiles and tolerance system for ISO miniature screw threads (S) differ from the profile and tolerance system for ISO general purpose metric screw threads (M). For threads with nominal diameters from 1 mm to 1,4 mm, designers shall
19、decide to use ISO general purpose metric screw threads (M) or ISO miniature screw threads (S). ISO miniature screw threads are shown in Annex A. Annex C illustrates the differences in miniature screw threads between the ISO International Standards and those of certain countries. 2 Normative referenc
20、es The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 5408:1), Screw threads Vocabulary 3 Terms
21、and definitions For the purposes of this document, the terms and definitions given in ISO 5408 apply. 4 Symbols The following symbols are used: Symbol Term D basic major diameter of internal thread; nominal diameter D2basic pitch diameter of internal thread D1basic minor diameter of internal thread
22、d basic major diameter of external thread; nominal diameter 1) To be published. (Revision of ISO 5408:1983) BS ISO 1501:2009ISO 1501:2009(E) 2 ISO 2009 All rights reservedd2basic pitch diameter of external thread d1basic minor diameter of external thread on basic profile d3basic minor diameter of ex
23、ternal thread on design profile P pitch H height of fundamental triangle H1height of thread on basic profile; flank overlap h3height of external thread on design profile acclearance between minor diameters on design profile EI lower deviations of internal thread on design profile es upper deviations
24、 of external thread on design profile Ttolerances TD2tolerances for D2TD1tolerances for D1Tdtolerances for d Td2tolerances for d2Td3tolerances for d35 Profiles 5.1 Basic profile The basic profile is shown as a thick line in Figure 1. The dimensions of the basic profile are given in Table 1. aAxis of
25、 screw thread. Figure 1 Basic profile BS ISO 1501:2009ISO 1501:2009(E) ISO 2009 All rights reserved 35.2 Design profile The design profile is shown as a thick line in Figure 2. The dimensions of the design profile are given in Table 1. Key 1 internal thread 2 external thread Figure 2 Design profile
26、Table 1 Dimensions of profiles Dimensions in millimetres Pitch H H10,375H h3acP 0,866 025P 0,48P 0,324 760P 0,56P 0,08P 0,08 0,069 282 0,038 400 0,025 981 0,044 800 0,006 0,09 0,077 942 0,043 200 0,029 228 0,050 400 0,007 0,1 0,086 603 0,048 000 0,032 476 0,056 000 0,008 0,125 0,108 253 0,060 000 0,
27、040 595 0,070 000 0,010 0,15 0,129 904 0,072 000 0,048 714 0,084 000 0,012 0,175 0,151 554 0,084 000 0,056 833 0,098 000 0,014 0,2 0,173 205 0,096 000 0,064 952 0,112 000 0,016 0,225 0,194 856 0,108 000 0,073 071 0,126 000 0,018 0,25 0,216 506 0,120 000 0,081 190 0,140 000 0,020 0,3 0,259 808 0,144
28、000 0,097 428 0,168 000 0,024 6 Diameter-pitch combinations and basic dimensions The diameter-pitch combinations and basic dimensions are given in Table 2. For threads with nominal diameters from 1 mm to 1,4 mm, diameter-pitch combinations and basic dimensions are given in Annex A. BS ISO 1501:2009I
29、SO 1501:2009(E) 4 ISO 2009 All rights reservedChoose, preferably, diameters in column 1 of Table 2. Table 2 Diameter-pitch combinations and basic dimensions Dimensions in millimetres Nominal diameter D, d Minor diameter First choice Second choicePitch P Pitch diameter D2, d2Internal thread D1Externa
30、l thread d30,3 0,08 0,248 0,223 0,210 0,35 0,09 0,292 0,264 0,249 0,4 0,1 0,335 0,304 0,288 0,45 0,1 0,385 0,354 0,338 0,5 0,125 0,419 0,380 0,360 0,55 0,125 0,469 0,430 0,410 0,6 0,15 0,503 0,456 0,432 0,7 0,175 0,586 0,532 0,504 0,8 0,2 0,670 0,608 0,576 0,9 0,225 0,754 0,684 0,648 NOTE See Annex
31、A for threads with nominal diameters from 1 mm to 1,4 mm. The basic dimensions given in Table 2 are calculated using Equations (1), (2) and (3): D2= d2= d 0,649 52P (1) D1= d 0,96P (2) d3= d 1,12P (3) NOTE The formula for d3given in Equation (3) is based upon a root radius equal to 0,2P approximatel
32、y. 7 Tolerances 7.1 Tolerance position The tolerance positions for diameters D, D2, D1, d, d2and d3are given in Table 3. The fundamental deviations of diameters are given in Table 4. 7.2 Tolerance grades The tolerance grades for diameters D2, D1, d, d2and d3are given in Table 5. The tolerances of di
33、ameters are given in Table 6. There is no tolerance requirement for diameters D. BS ISO 1501:2009ISO 1501:2009(E) ISO 2009 All rights reserved 57.3 Grade-position combinations and tolerance zones For internal threads, tolerance Grade 3 of pitch diameter shall be used for the tolerance position G and
34、 thread tolerance Grade 4 of pitch diameter shall be used for the tolerance position H. For internal threads, there are four tolerance classes, 3G5, 3G6, 4H5 and 4H6. See Figure 3. For external threads, there is only one tolerance class, 5h3. See Figure 4. NOTE For the symbol designating tolerance c
35、lass, see Clause 8. Table 3 Tolerance positions Thread Diameter Position Major diameter D Pitch diameter D2G, H Internal thread Minor diameter D1H Major diameter d Pitch diameter d2External thread Minor diameter d3h NOTE The tolerance positions of major diameter D and pitch diameter D2for internal t
36、hread are always the same. Table 4 Fundamental deviations Deviations in micrometres Internal thread External thread D, D2D, D2, D1d, d2, d3G H h Pitch P mm EI EI es 0,08 +6 0 0 0,09 +6 0 0 0,1 +6 0 0 0,125 +8 0 0 0,15 +8 0 0 0,175 +10 0 0 0,2 +10 0 0 0,225 +10 0 0 NOTE See Annex A for threads with n
37、ominal diameters from 1 mm to 1,4 mm. BS ISO 1501:2009ISO 1501:2009(E) 6 ISO 2009 All rights reservedTable 5 Tolerance grades Thread Diameter Grade Pitch diameter D23, 4 Internal thread Minor diameter D15, 6 Major diameter d 3 Pitch diameter d25 External thread Minor diameter d34 NOTE Usually there
38、is no requirement to check d3for conformance. Table 6 Tolerances Tolerances in micrometres Internal thread External thread TD2TD1TdTd2Td3Pitch P mm Grade 3 Grade 4 Grade 5 Grade 6 Grade 3 Grade 5 Grade 4 0,08 14 20 17 16 20 20 0,09 16 22 22 18 22 22 0,1 18 24 26 38 20 24 24 0,125 18 26 35 55 20 26 2
39、8 0,15 20 28 46 66 25 28 32 0,175 22 32 53 73 25 32 36 0,2 26 36 57 77 30 36 40 0,225 30 40 61 81 30 40 44 NOTE 1 See Annex A for threads with nominal diameters from 1 mm to 1,4 mm. NOTE 2 Usually there is no requirement to check d3for conformance. a) Tolerance class 3G5 and 3G6 Figure 3 (continued)
40、 BS ISO 1501:2009ISO 1501:2009(E) ISO 2009 All rights reserved 7b) Tolerance class 4H5 and 4H6 Key 1 design profile Figure 3 Tolerance zone of internal thread Tolerance class 5h3 Key 1 design profile Figure 4 Tolerance zone of external thread BS ISO 1501:2009ISO 1501:2009(E) 8 ISO 2009 All rights re
41、served8 Designation The designation of a screw thread shall comprise the letter S and the value of the nominal diameter expressed in millimetres, followed by a dash and the symbol for the tolerance class. The symbol for the tolerance class shall comprise: a figure indicating the tolerance grade of p
42、itch diameter; a letter indicating the tolerance position of pitch diameter; capital letter for internal threads, lowercase letter for external threads; a figure indicating the tolerance grade of crest diameter, minor diameter of internal thread or major diameter of external thread. A fit between th
43、readed parts shall be indicated by the internal thread tolerance class symbol followed by the external thread tolerance class symbol, separated by a stroke. When left-hand threads are specified, the letters LH shall be added to the thread designation, separated by a dash. EXAMPLE 1 External thread:
44、EXAMPLE 2 Internal thread: EXAMPLE 3 Fit between threaded parts: S 0,9 - 3G5/5h3 EXAMPLE 4 Left-hand thread: S 0,9 - 4H6 - LH 9 Limits of size The limits of size for tolerance classes 3G5, 3G6, 4H5, 4H6 and 5h3 are given in Tables 7, 8 and 9. BS ISO 1501:2009ISO 1501:2009(E) ISO 2009 All rights rese
45、rved 9Table 7 Limits of size for tolerance classes 3G5 and 3G6 Dimensions in millimetres 3G Grade 5 Grade 6 Major diameter D Pitch diameter D2Minor diameter D1Nominal diameter D Pitch P max. min. max. min. max. min. max. min. 0,3 0,08 0,306 0,268 0,254 0,240 0,223 0,35 0,09 0,356 0,314 0,298 0,286 0
46、,264 0,4 0,1 0,406 0,359 0,341 0,330 0,304 0,342 0,304 0,45 0,1 0,456 0,409 0,391 0,380 0,354 0,392 0,354 0,5 0,125 0,508 0,445 0,427 0,415 0,380 0,435 0,380 0,55 0,125 0,558 0,495 0,477 0,465 0,430 0,485 0,430 0,6 0,15 0,608 0,531 0,511 0,502 0,456 0,522 0,456 0,7 0,175 0,710 0,618 0,596 0,585 0,53
47、2 0,605 0,532 0,8 0,2 0,810 0,706 0,680 0,665 0,608 0,685 0,608 0,9 0,225 not specified 0,910 0,794 0,764 0,745 0,684 0,765 0,684 NOTE See Annex A for threads with nominal diameters from 1 mm to 1,4 mm. Table 8 Limits of size for tolerance classes 4H5 and 4H6 Dimensions in millimetres 4H Grade 5 Gra
48、de 6 Major diameter D Pitch diameter D2Minor diameter D1Nominal diameter D Pitch P max. min. max. min. max. min. max. min. 0,3 0,08 0,300 0,268 0,248 0,240 0,223 0,35 0,09 0,350 0,314 0,292 0,286 0,264 0,4 0,1 0,400 0,359 0,335 0,330 0,304 0,342 0,304 0,45 0,1 0,450 0,409 0,385 0,380 0,354 0,392 0,3
49、54 0,5 0,125 0,500 0,445 0,419 0,415 0,380 0,435 0,380 0,55 0,125 0,550 0,495 0,469 0,465 0,430 0,485 0,430 0,6 0,15 0,600 0,531 0,503 0,502 0,456 0,522 0,456 0,7 0,175 0,700 0,618 0,586 0,585 0,532 0,605 0,532 0,8 0,2 0,800 0,706 0,670 0,665 0,608 0,685 0,608 0,9 0,225 not specified 0,900 0,794 0,754 0,745 0,684 0,765 0,684 NOTE See Annex A for threads with nominal diameters from 1 mm to 1,4 mm. BS ISO 1501:2009ISO 1501:2009(E) 10 ISO 2009 All rights reservedTable 9 L
