1、 One or more corrigenda exist with corrections to this document. These can be searched online and ordered free of charge at www.beuth.de August 2005DEUTSCHE NORM Translation by DIN-Sprachendienst.English price group 8No part of this translation may be reproduced without prior permission ofDIN Deutsc
2、hes 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!$VcS“1516448www.din.deDDIN 8140-2Wire thread inserts for ISO metric screw threads Part 2: Tapped holes for thread inserts, thread tolerances
3、Gewindeeinstze aus Draht fr Metrisches ISO-Gewinde Teil 2: Aufnahmegewinde fr Gewindeeinstze, GewindetoleranzenSupersedesDIN 8140-2:1988-10www.beuth.deDocument comprises 9 pagesIn case of doubt, the German-language original should be consulted as the authoritative text.DIN 8140-2:2005-08 2 Contents
4、Page Foreword 3 1 Scope 4 2 Normative references 4 3 Terms and definitions . 4 4 Basic profile of tapped hole thread 5 5 Thread tolerances 5 6 Designation 6 7 Thread dimensions and tolerances for tapped holes 7 7.1 Coarse pitch thread tapped holes 7 7.2 Fine pitch thread tapped holes. 8 7.3 Coarse p
5、itch and fine pitch thread tapped holes produced to tolerance class 6G mod 9 DIN 8140-2:2005-08 3 Foreword This standard has been prepared by Section B Gewinde of the Normenausschuss Technische Grundlagen (Fundamental Technical Standards Committee). It supersedes DIN 8140-2:1988-10 from which it dif
6、fers in that it has been editorially revised and references have been updated (see Amendments). Amendments This standard differs from DIN 8140-2:1988-10 as follows: a) The symbol denoting limit deviation Auhas been changed to EI. b) References have been updated. c) The standard has been editorially
7、revised. Previous editions DIN 8140-2: 1988-10 DIN 8140-2:2005-08 4 1 Scope This standard specifies limits of size and tolerances for tapped holes receiving wire thread inserts (“thread inserts”, for short) designed to provide 2 mm to 52 mm diameter internal threads (coarse and fine pitch screw thre
8、ads) having a basic profile as specified in DIN ISO 68-1. Thread inserts as specified in DIN 8140-1 provide tolerance class 6H limits for internal threads as in DIN ISO 965-1. 2 Normative references The following reference documents are indispensable for the application of this document. For dated r
9、eferences, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. DIN 13-1, General purpose ISO metric screw threads Part 1: Nominal sizes for 1 mm to 68 mm diameter coarse pitch threads DIN 13-5, General purpose ISO
10、metric screw threads Part 5: Nominal sizes for 1 mm and 1,25 mm fine pitch threads with diameters from 7,5 mm to 200 mm DIN 13-6, General purpose ISO metric screw threads Part 6: Nominal sizes for 1,5 mm fine pitch threads with diameters from 12 mm to 300 mm DIN 13-7, General purpose ISO metric scre
11、w threads Part 7: Nominal sizes for 2 mm fine pitch threads with diameters from 17 mm to 300 mm DIN 13-8, General purpose ISO metric screw threads Part 8: Nominal sizes for 3 mm fine pitch threads with diameters from 28 mm to 300 mm DIN 13-9, General purpose ISO metric screw threads Part 9: Nominal
12、sizes for 4 mm fine pitch threads with diameters from 40 mm to 300 mm DIN 2244, Screw threads Terms and screw thread elements for parallel screw threads DIN 8140-1, Wire thread inserts for ISO metric threads Part 1: Dimensions and technical delivery conditions DIN ISO 68-1, ISO general purpose screw
13、 threads Basic profile Part 1: Metric screw threads DIN ISO 965-1, ISO general purpose metric screw threads Tolerances Part 1: Principles and basic data 3 Terms and definitions For the purposes of this standard the terms and definitions given in DIN 2244 apply. DIN 8140-2:2005-08 5 4 Basic profile o
14、f tapped hole thread Tapped holes (EG) are designed to receive thread inserts. NOTE EG is the acronym for Einsatzgewinde (see DIN 8140-1). Key 1 Thread of tapped hole 2 Thread insert 3 External thread d major diameter of external thread (nominal size) DEGmajor diameter of tapped hole thread D1 EGmin
15、or diameter of tapped hole thread D2 EGpitch diameter of tapped hole thread H height of fundamental triangle PP = 025 0,86623H1thread overlap = 2HP pitch Figure 1 Basic profile of tapped hole and relative position of thread insert 5 Thread tolerances Tolerances smaller than given in DIN ISO 965-1 ha
16、ve been specified for the pitch diameter of the tapped hole to allow for any deviations occurring when fitting the thread insert. It shall be ensured that the thread of the assembly is produced to tolerance class 6H; for this reason, the same tolerance symbol shall be assigned to the thread of the t
17、apped hole as to that of the assembly, in the latter case “mod” (denoting “modified tolerance”) being placed after the tolerance symbol. DIN 8140-2:2005-08 6 Table 1 Tolerance classes for tapped holes, internal and external threads Tolerance class Name of screw thread Tapped hole, bright Tapped hole
18、 with positive fundamental deviation for allow for any electroplated coatingaTapped hole 6H mod 6G mod Internal thread of assembly 6H (as specified in DIN ISO 965-1) Tolerance class recommended for external thread 6 g (as specified in DIN ISO 965-1) aBefore receiving the thread insert, the tapped ho
19、le shall be provided with an electroplated coating. For tapped holes produced to have a minimum pitch diameter, the coating thickness may be up to 1/4 of the fundamental deviation. At no point shall the dimensions of threads produced by electroplating (including phosphating) be less than the maximum
20、 material limits for position H (as given by the GO gauges at the wear limits). 6 Designation The tolerances shall be given in the designation as specified in DIN ISO 965-1 for ISO metric screw threads. Example of designation for the thread of a bright tapped hole: Thread DIN 8140 EG M20 2 Term DIN
21、number Symbol denoting tapped hole (EG) for thread inserts Thread size (major diameter pitch) The tolerance class 6H mod shall not be included in the designation. “6G mod” shall be added to the designation for tapped holes with a positive fundamental deviation for allow for electroplating, e.g. Thre
22、ad DIN 8140 EG M20 2 6G mod See DIN 8140-1 for indications on drawings of tapped holes (EG). DIN 8140-2:2005-08 7 7 Thread dimensions and tolerances for tapped holes Key 1 Tolerance zone TD1 EGTolerance on minor diameter of tapped hole thread TD2 EGTolerance on pitch diameter of tapped hole thread F
23、igure 2 Thread dimensions and tolerances for tapped holes (notation) 7.1 Coarse pitch thread tapped holes Table 2 Preferred thread sizes; limits and tolerances for coarse pitch thread tapped holes produced to tolerance class 6H mod Dimensions in millimetres Major diameter Pitch diameter Minor diamet
24、er Pitch DEGD2 EGTD2 EGD2 EGD1 EGTD1 EGD1 EGThread size P minimum minimum maximum minimum maximum EG M2 0,4 2,520 2,260 0,051 2,311 2,087 0,090 2,177 EG M2,5 0,45 3,084 2,792 0,055 2,847 2,597 0,100 2,697 EG M3 0,5 3,650 3,325 0,059 3,384 3,108 0,112 3,220 EG M4 0,7 4,910 4,455 0,074 4,529 4,152 0,1
25、40 4,292 EG M5 0,8 6,040 5,520 0,077 5,597 5,174 0,160 5,334 EG M6 1 7,300 6,650 0,092 6,742 6,217 0,190 6,407 EG M8 1,25 9,624 8,812 0,100 8,912 8,271 0,212 8,483 EG M10 1,5 11,948 10,974 0,115 11,089 10,324 0,236 10,560 EG M12 1,75 14,274 13,137 0,134 13,271 12,379 0,265 12,644 EG M16 2 18,598 17,
26、299 0,145 17,444 16,433 0,300 16,733 EG M20 2,5 23,248 21,624 0,154 21,778 20,541 0,355 20,896 EG M24 3 27,897 25,948 0,187 26,135 24,649 0,400 25,049 EG M30 3,5 34,546 32,273 0,199 32,472 30,757 0,450 31,207 EG M36 4 41,196 38,598 0,211 38,809 36,866 0,475 37,341 DIN 8140-2:2005-08 8 Table 3 Non-re
27、commended thread sizes; limits and tolerances for coarse pitch thread tapped holes produced to tolerance class 6H mod Dimensions in millimetres Major diameter Pitch diameter Minor diameter Pitch DEGD2 EGTD2 EGD2 EGD1 EGTD1 EGD1 EGThread size P minimum minimum maximum minimum maximum EG M3,5 0,6 4,28
28、0 3,890 0,069 3,959 3,630 0,125 3,755 EG M7 1 8,300 7,650 0,092 7,742 7,217 0,190 7,407 EG M14 2 16,598 15,299 0,145 15,444 14,433 0,300 14,733 EG M18 2,5 21,248 19,624 0,154 19,778 18,541 0,355 18,896 EG M22 2,5 25,248 23,624 0,154 23,778 22,541 0,355 22,896 EG M27 3 30,897 28,948 0,187 29,135 27,6
29、49 0,400 28,049 EG M33 3,5 37,546 35,273 0,199 35,472 33,757 0,450 34,207 EG M39 4 44,196 41,598 0,211 41,809 39,866 0,475 40,341 EG M42 4,5 47,846 44,923 0,224 45,147 42,975 0,530 43,505 EG M45 4,5 50,846 47,923 0,224 48,147 45,975 0,530 46,505 EG M48 5 54,495 51,247 0,240 51,487 49,082 0,560 49,64
30、2 EG M52 5 58,495 55,247 0,240 55,487 53,082 0,560 53,642 The classification of thread sizes specified here is not identical with that specified for series 1 in DIN 13-1 or in DIN 8140-1 (see Explanatory notes in DIN 8140-1). 7.2 Fine pitch thread tapped holes Table 4 Preferred thread sizes; limits
31、and tolerances for fine pitch thread tapped holes produced to tolerance class 6H mod Dimensions in millimetres Major diameter Pitch diameter Minor diameter DEGD2 EGTD2 EGD2 EGD1 EGTD1 EGD1 EGThread size minimum minimum maximum minimum mximum EG M8 1 9,300 8,650 0,092 8,742 8,217 0,190 8,407 EG M10 1
32、 11,300 10,650 0,092 10,742 10,217 0,190 10,407 EG M10 1,25 11,624 10,812 0,100 10,912 10,271 0,212 10,483 EG M12 1 13,300 12,650 0,100 12,750 12,217 0,190 12,407 EG M12 1,25 13,624 12,812 0,114 12,926 12,271 0,212 12,483 EG M12 1,5 13,948 12,974 0,125 13,099 12,324 0,236 12,560 EG M16 1,5 17,948 16
33、,974 0,125 17,099 16,324 0,236 16,560 EG M20 1,5 21,948 20,974 0,125 21,099 20,234 0,236 20,560 EG M20 2 22,598 21,299 0,145 21,444 20,433 0,300 20,733 EG M24 1,5 25,948 24,974 0,135 25,109 24,324 0,236 24,560 EG M24 2 26,598 25,299 0,155 25,454 24,433 0,300 24,733 EG M30 1,5 31,948 30,974 0,135 31,
34、109 30,324 0,236 30,560 EG M30 2 32,598 31,299 0,155 31,454 20,433 0,300 30,733 EG M36 2 38,598 37,299 0,155 37,454 36,433 0,300 36,733 EG M36 3 39,897 37,948 0,187 38,135 36,649 0,400 37,049 DIN 8140-2:2005-08 9 Table 5 Non-recommended thread sizes; limits and tolerances for fine pitch thread tappe
35、d holes produced to tolerance class 6H mod Dimensions in millimetres Major diameter Pitch diameter Minor diameter DEGD2 EGTD2 EGD2 EGD1 EGTD1 EGD1 EGThread size minimum minimum maximum minimum maximum EG M9 1 10,300 9,650 0,092 9,742 9,217 0,190 9,407 EG M11 1 12,300 11,650 0,092 11,742 11,217 0,190
36、 11,407 EG M14 1 EG M14 1,25 EG M14 1,5 15,300 15,624 15,948 14,650 14,812 14,974 0,100 0,114 0,125 14,750 14,926 15,099 14,217 14,271 14,324 0,190 0,212 0,236 14,407 14,483 14,560 EG M15 1,5 16,948 15,974 0,125 16,099 15,324 0,236 15,560 EG M18 1,5 EG M18 2 19,948 20,598 18,974 19,299 0,125 0,145 1
37、9,099 19,444 18,324 18,433 0,236 0,300 18,560 18,733 EG M22 1,5 EG M22 2 23,948 24,598 22,974 23,299 0,125 0,145 23,099 23,444 22,324 22,433 0,236 0,300 22,560 22,733 EG M26 1,5 27,948 26,974 0,135 27,109 26,324 0,236 26,560 EG M27 1,5 EG M27 2 28,946 29,598 27,974 28,299 0,135 0,155 28,109 28,454 2
38、7,324 27,433 0,236 0,300 27,560 27,733 EG M28 1,5 29,948 28,974 0,135 29,109 28,324 0,236 28,560 EG M30 3 33,897 31,948 0,187 32,135 30,649 0,400 31,049 EG M33 2 EG M33 3 35,598 36,897 34,299 34,948 0,155 0,187 34,454 35,135 33,433 33,649 0,300 0,400 33,733 34,049 EG M39 2 EG M39 3 41,598 42,897 40,
39、299 40,948 0,155 0,187 40,454 41,135 39,433 39,649 0,300 0,400 39,733 40,049 EG M42 2 EG M42 3 EG M42 4 44,598 45,897 47,196 43,299 43,948 44,598 0,155 0,187 0,211 43,454 44,135 44,809 42,433 42,649 42,866 0,300 0,400 0,475 42,733 43,049 43,341 EG M45 2 EG M45 3 47,598 48,897 46,299 46,948 0,155 0,1
40、87 46,454 47,135 45,433 45,649 0,300 0,400 45,733 46,049 EG M48 2 EG M48 3 50,598 51,897 49,299 49,948 0,165 0,199 49,464 50,147 48,433 48,649 0,300 0,400 48,733 49,049 The classification of thread sizes specified here is not identical with that specified for series 1 in DIN 13-5 to DIN 13-9 and in
41、DIN 8140-1. Thread inserts for fine pitch threads exceeding size M39 3 are not customary. 7.3 Coarse pitch and fine pitch thread tapped holes produced to tolerance class 6G mod Tolerance class 6G mod shall be used where the tapped hole is to be provided with an electroplated coating. It refers to th
42、e tapped hole in the condition before electroplating (see also footnote a in Table 1). The specifications of Tables 2 to 5 are based on the lower deviations, EI, of tolerance position G as specified in DIN ISO 965-1. The limits of size applicable to the thread before coating shall be calculated from the diameter values given in Table 2 or 3 of this standard, adding EI of tolerance position G. After coating, the diameter shall reach at least the values specified in Table 2 or 3.
