1、May 2017 English price group 13No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 21.040.10!%e_-“2666010www.din.deDIN
2、ISO 965-1ISO general purpose metric screw threads Tolerances Part 1: Principles and basic data (ISO 9651:2013),English translation of DIN ISO 965-1:2017-05Metrisches ISOGewinde allgemeiner Anwendung Toleranzen Teil 1: Prinzipien und Grundlagen (ISO 9651:2013),Englische bersetzung von DIN ISO 965-1:2
3、017-05Filetages mtriques ISO pour usages gnraux Tolrances Partie 1: Principes et donnes fondamentales (ISO 9651:2013),Traduction anglaise de DIN ISO 965-1:2017-05SupersedesDIN ISO 9651:199911www.beuth.deDocument comprises 25 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-langua
4、ge original shall be considered authoritative.06.17 DIN ISO 965-1:2017-05 A comma is used as the decimal marker. 2 Contents Page National foreword . 3 National Annex NA (informative) Bibliography 4 Foreword 5 1 Scope 6 2 Normative references 6 3 Terms, definitions and symbols . 6 3.1 Terms and defin
5、itions . 6 3.2 Symbols . 6 4 Tolerance system 7 5 Tolerance positions 8 6 Tolerance grades 10 7 Lengths of thread engagement 14 8 Recommended tolerance classes 15 8.1 General . 15 8.2 Tolerance quality . 15 8.3 Preference order 16 8.4 Combination of internal threads and external threads . 16 8.5 Coa
6、ted threads 16 9 Multiple-start threads 17 10 Formulae . 17 10.1 General . 17 10.2 Fundamental deviations 17 10.3 Crest diameter tolerances . 18 10.4 Pitch diameter tolerances . 19 10.5 Length of thread engagement 20 11 Root contours 20 12 Designation. 22 12.1 General . 22 12.2 Designation of single
7、-start screw threads 22 12.3 Designation of multiple-start screw threads . 24 12.4 Designation of left-hand threads 24 Bibliography . 25 DIN ISO 965-1:2017-05 National foreword ISO 965-1:2013 has been adopted in this standard without any modification. This document has been prepared by Technical Com
8、mittee ISO/TC 1 “Screw threads” (Secretariat: SAC, China). The responsible German body involved in its preparation was DIN-Normenausschuss Technische Grund-lagen (DIN Standards Committee Technical Fundamentals), Working Committee NA 152-02-01 AA “Screw threads”. Attention is drawn to the possibility
9、 that some of the elements of this document may be the subject of patent rights. DIN shall not be held responsible for identifying any or all such patent rights. The standard series DIN ISO 965, “ISO general purpose metric screw threads Tolerances” consists of the following parts: Part 1: Principles
10、 and basic data Part 2: Limits of sizes for general purpose external and internal screw threads Medium quality Part 3: Deviations for constructional threads Part 4: Limits of sizes for hot-dip galvanized external screw threads to mate with internal screw threads tapped with tolerance position H or G
11、 after galvanizing Part 5: Limits of sizes for internal screw threads to mate with hot-dip galvanized external screw threads with maximum size of tolerance position h before galvanizing The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 68
12、-1 DIN ISO 68-1 ISO 261 DIN ISO 261 ISO 898-1 DIN EN ISO 898-1 ISO 1502 DIN ISO 1502 Further information for the use of this document is given in the national footnotes: N1)Pitch and lead are identical (P = Ph) in multiple-start threads. N2)The designation of the zero lines in Figures 4 and 5 as “o”
13、 which had been incorrect in ISO 965-1:2013 unfortunately could not be corrected in this DIN standard. N3)The tolerances of the crest diameter of the external thread Td3are numerically increased by the same amount as tolerance Td2. N4)With Cmin, the result is: d3min= d2 |es| Td2 H + 0,25 P. 3 DIN IS
14、O 965-1:2017-05 Amendments This standard differs from DIN ISO 965-1:1999-11 as follows: a) tolerance positions a, b, c and d for external threads have been included; b) fundamental deviations for tolerance positions G and g have been corrected as concerns lead 0,2; c) the term “multiple-start thread
15、s” has been extended (Ph can be dropped); d) Clause 9 “Multiple-start threads” including Table 9 with factors for multiple-start threads for the determination of tolerances has been included; e) the standard has been editorially revised. Previous editions DIN 40404: 1957-11 DIN 13-32: 1960-10, 1962-
16、10, 1964-06, 1965-07 DIN 13-14: 1952-01, 1972-03, 1982-08 DIN 13-15: 1952-01, 1972-03, 1982-08 DIN ISO 965-1: 1999-11 National Annex NA (informative) Bibliography DIN EN ISO 898-1, Mechanical properties of fasteners made of carbon steel and alloy steel Part 1: Bolts, screws and studs with specified
17、property classes Coarse thread and fine pitch thread DIN ISO 68-1, ISO general purpose metric screw threads Basic profile Part 1: Metric screw threads DIN ISO 261, ISO general purpose metric screw threads General plan DIN ISO 1502, ISO general purpose metric screw threads Gauges and gauging 4 DIN IS
18、O 965-1:2017-05 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 interested in a subjec
19、t 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 Commission (IEC)
20、 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 documents should be not
21、ed. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2. www.iso.org/directivesAttention 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 identifying any or
22、 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. www.iso.org/patentsAny trade name used in this document is information given for the convenience of users and do
23、es not constitute an endorsement.The committee responsible for this document is ISO/TC ISO 965-1 was prepared by Technical Committee ISO/TC 1, Screw Threads.This fourth edition cancels and replaces the third edition (ISO 965-1:1998), which has been technically revised. It also incorporates the Techn
24、ical Corrigendum ISO 965-1:1998/Cor.1:2009.ISO 965 consists of the following parts, under the general title ISO general purpose metric screw threads Tolerances: Part 1: Principles and basic data Part 2: Limits of sizes for general purpose external and internal screw threads Medium quality Part 3: De
25、viations for constructional screw threads Part 4: Limits of sizes for hot-dip galvanized external threads to mate with internal screw threads tapped with tolerance position H or G after galvanizing Part 5: Limits of sizes for internal screw threads to mate with hot-dip galvanized external screw thre
26、ads with maximum size of tolerance position h before galvanizing5 1 ScopeThis part of ISO 965 specifies a tolerance system for ISO general purpose metric screw threads (M) according to ISO 261.The tolerance system refers to the basic profile according to ISO 68-1.2 Normative referencesThe following
27、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 68-1, ISO general purpose screw threads Basic profile Part 1
28、: Metric screw threadsISO 261, ISO general purpose metric screw threads General planISO 1502, ISO general-purpose metric screw threads Gauges and gaugingISO 5408, Screw threads Vocabulary3 Terms, definitions and symbols3.1 Terms and definitionsFor the purposes of this document, the terms and definit
29、ions given in ISO 5408 apply.3.2 SymbolsFor the purposes of this document, the following symbols apply.Symbol MeaningD basic major diameter of internal threadD1basic minor diameter of internal threadD2basic pitch diameter of internal threadd basic major diameter of external threadd1basic minor diame
30、ter of external threadd2basic pitch diameter of external threadd3minor diameter of external thread (see Figure 6)ISO general purpose metric screw threads Tolerances Part 1: Principles and basic data DIN ISO 965-1:2017-05 6 Ph leadH height of fundamental triangleS designation for “short” thread engag
31、ement groupN designation for “normal” thread engagement groupL designation for “long” thread engagement groupT toleranceTD1, TD2, Td, Td2tolerances for D1, D2, d and d2ei, EI lower limit deviations (see Figure 1)es, ES upper limit deviations (see Figure 1)R root radius of external thread (see Figure
32、 6)C root truncation of external thread (see Figure 6)Figure 1 Position of tolerances with respect to zero line (basic size)4 Tolerance systemThe tolerance system consists of tolerance grades and tolerance positions. The tolerance grades are expressed by number, such as 4, 6 and 8. The tolerance pos
33、itions are expressed by letter, such as H, G, h and g. The tolerance class designation shall be the combination of the number and the letter, for example 6H and 6g.DIN ISO 965-1:2017-05 P pitchN1) National footnote: Pitch and lead are identical (P = Ph) in multiple-start threads. N1)7 H with zero fu
34、ndamental deviation (EI), shown in Figure 3. for external threads: a, b, c, d, e, f and g with negative fundamental deviation (es), shown in Figure 4; h with zero fundamental deviation (es), shown in Figure 5.The established tolerance positions comply with the needs of coating thickness and with the
35、 demands of easy assembly.The fundamental deviations for internal threads and external threads are given in Table 1.DIN ISO 965-1:2017-05 5 Tolerance positionsThe following tolerance positions are standardized: for internal threads: G with positive fundamental deviation (EI), shown in Figure 2; 8 Ke
36、y1 basic profileKey1 basic profileFigure 2 Internal threads with tolerance position GFigure 3 Internal threads with tolerance position HKey1 basic profileKey1 basic profileaApplication only in connection with minimum material limits (d2 min); see Clause 11, Figure 6.aApplication only in connection w
37、ith minimum material limits (d2 min); see Clause 11, Figure 6.Figure 4 External threads with tolerance positions a, b, c, d, e, f and gFigure 5 External threads with tolerance position hDIN ISO 965-1:2017-05 N2) National footnote: The designation of the zero lines in Figures 4 and 5 as “o” which was
38、 incorrect in ISO 965-1:2013 unfortunately could not be corrected in this DIN standard. N2)N2)9 Table 1 Fundamental deviations for internal threads and external threadsPitchPmmFundamental deviationInternal thread External threadGEImHEImaesmbesmcesmdesmeesmfesmgesmhesm0,20,250,3+17+18+180001718180000
39、,350,40,45+19+19+200003434351919200000,50,60,7+20+21+220005053563636382021220000,750,81+22+24+26000290200130855660603838402224260001,251,51,75+28+32+34000295300310205212220135140145909510063677142454828323400022,53+38+42+480003153253352252352451501601701051101157180855258633842480003,544,5+53+60+630
40、00345355365255265280180190200125130135909510070758053606300055,568+71+75+80+1000000375-38539542529030031034021222423626514015015518010611211814085909511871758010000006 Tolerance gradesThe tolerance grades for the following screw thread diameters are standardized:Tolerance gradeD14, 5, 6, 7, 8d 4, 6,
41、 8D24, 5, 6, 7, 8d23, 4, 5, 6, 7, 8, 9DIN ISO 965-1:2017-05 10 Clause 8 shows details of tolerance grades and combinations of tolerance grades for pitch and crest diameters according to the tolerance quality and length of engagement group required, with the order of preference.In some grades, certai
42、n tolerance values for small pitches are not shown in tolerance tables because of insufficient thread overlap or the requirement that the pitch diameter tolerance not exceed the crest diameter tolerance.The minor diameter tolerances of internal thread, TD1, are given in Table 2.Table 2 Minor diamete
43、r tolerances of internal thread (TD1)PitchPmmTolerance grade4m5m6m7m8m0,20,250,33845535667850,350,40,4563718080901001001121250,50,60,7901001121121251401401601801802002240,750,811181251501501601901902002362362503003153751,251,51,7517019021221223626526530033533537542542547553022,5323628031530035540037
44、54505004755606306007108003,544,53553754254504755305606006707107508509009501 06055,5684504755006305606006308007107508001 0009009501 0001 2501 1201 1801 2501 600The major diameter tolerances of external thread, Td, are given in Table 3. The tolerance grades 5 and 7 do not exist for them.DIN ISO 965-1:
45、2017-05 11 Table 3 Major diameter tolerances of external thread (Td)PitchPmmTolerance grade4m6m8m0,20,250,33642485667750,350,40,4553606385951000,50,60,76780901061251400,750,8190951121401501802362801,251,51,7513215017021223626533537542522,531802122362803353754505306003,544,526530031542547550067075080
46、055,5683353553754505305606007108509009501 180The pitch diameter tolerances of internal thread, TD2, are given in Table 4.The pitch diameter tolerances of external thread, Td2, are given in Table 5.Table 4 Pitch diameter tolerances of internal thread (TD2)Basic major diameter DPitch P mmTolerance gra
47、deover mmup to and including mm4 m5 m6 m7 m8 m0,99 1,40,2 0,25 0,340 45 48 56 60 75 1,4 2,80,2 0,25 0,35 0,4 0,4542 48 53 56 60 60 67 71 75 85 90 95 DIN ISO 965-1:2017-05 12 Basic major diameter DPitch P mmTolerance gradeover mmup to and including mm4 m5 m6 m7 m8 m2,8 5,60,35 0,5 0,6 0,7 0,75 0,856
48、63 71 75 75 8071 80 90 95 95 10090 100 112 118 118 125 125 140 150 150 160 2005,6 11,20,75 1 1,25 1,585 95 100 112106 118 125 140132 150 160 180170 190 200 224 236 250 28011,2 22,41 1,25 1,5 1,75 2 2,5100 112 118 125 132 140125 140 150 160 170 180160 180 190 200 212 224200 224 236 250 265 280250 280 300 315 335 35522,4 451 1,5 2 3 3,5 4 4,5106 125 140 170 180 190 200132 160 180 212 224 236 250170 200 224 265 280 300 315212 250 280
