1、ICS 25.100.50Durchmesser fr Bohrer fr Gewindekerndurchmesservon geschnittenen GewindenIn keeping with current practice in standards published by the International Organization for Standardization(ISO), a comma has been used throughout as the decimal marker.Ref. No. DIN 336 : 2003-07English price gro
2、up 09 Sales No. 010905.04July 2003 No part of this translation may be reproduced without the 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).Translation by DIN-Sprachendienst
3、.In case of doubt, the German-language original should be consulted as the authoritative text.Drills for use prior to tapping screw threadsContinued on pages 2 to 12.SupersedesApril 1997 edition.336ForewordThis standard has been prepared by Technical Committee Gewindebohrer und Gewindeschneideisen o
4、f theNormenausschuss Werkzeuge und Spannzeuge (Tools and Clamping Devices Standards Committee).See Explanatory notes for relationship to International Standard ISO 2306 : 1972, published by the Interna-tional Organization for Standardization.AmendmentsThis standard differs from the April 1997 editio
5、n in that it has been editorially revised and drill diameters forEG type metric threads*) (coarse and fine pitch series) have been introduced.Previous editionsDIN 336: 1926-07, 1932-04, 1943-07, 1997-04; DIN 336-1: 1963-12, 1969-04.IntroductionThe diameter of a hole produced by a drill depends to so
6、me extent upon the degree of accuracy to whichthe drill point is ground, the material being drilled, the lubricant used, and the alignment, feed and speedof the operation.When tapping relatively soft material, there is a tendency for the material to be squeezed down towards theroot, and in such case
7、s the minor diameter of the tapped hole may become smaller than the diameter of thedrill used. The tendency is very much less with harder materials, and in some cases is entirely absent.The larger the drilled hole, within the relevant minor diameter tolerance, the more economical tappingbecomes, and
8、 the risk of tap breakage is reduced.With the foregoing points in mind, the tables have been prepared as a guide to drilling prior to conventionaltapping. However, it is realised that users may find it beneficial to choose their own drill diameters for certainapplications.*) Threads with inserts.DEU
9、TSCHE NORMPage 2DIN 336 : 2003-07*) Currently at draft stage.All dimensions are in millimetres.1 ScopeThis standard specifies the sizes of drills to be used prior to tapping parallel screw threads of normal length ofengagement, the drill diameter being approximately equal to the nominal diameter of
10、the thread minus the pitch.This standard does not apply to threads produced by cold forming.Drill sizes are given for ISO metric threads (coarse and fine pitch series) in tables 1 and 2, for EG type metricthreads (coarse and fine pitch series) in tables 3 and 4, for ISO inch threads (UNC and UNF) in
11、 tables 5 and 6,and for pipe threads in tables 7 and 8.2 Normative referencesThis standard incorporates, by dated or undated reference, provisions from other publications. These norma-tive references are cited at the appropriate places in the text, and the titles of the publications are listed below
12、.For dated references, subsequent amendments to or revisions of any of these publications apply to thisstandard only when incorporated in it by amendment or revision. For undated references, the latest edition ofthe publication referred to applies.DIN 2999-1 Pipe threads for tubes and fittings Paral
13、lel internal threads and taper external threads Thread dimensionsDIN EN 10226-1 Pipe threads where pressure-tight joints are made on the threads Part 1: Designation,dimensions and tolerances*)DIN ISO 228-1 Pipe threads where pressure-tight joints are not made on the threads Part 1: Dimensions,tolera
14、nces and designation (ISO 228-1 : 2000)ISO 235 : 1980 Parallel shank jobber and stub series drills and Morse taper shank drillsISO 2306 : 1972 Drills for use prior to tapping screw threadsISO 5864 : 1993 ISO inch screw threads Allowances and tolerancesPage 3DIN 336 : 2003-073 ISO metric threads3.1 C
15、oarse pitch seriesTable 1: Drill diameter as a function of thread dimensions (ISO metric, coarse pitch)Thread sizeDrillNominalPitch, P 5H 6H 7H 5H, 6H and 7HdiameterdiameterMax. Max. Max. Min.M1 1 0,25 0,785 0,729 0,75M1,1 1,1 0,25 0,885 0,829 0,85M1,2 1,2 0,25 0,985 0,929 0,95M1,4 1,4 0,3 1,142 1,0
16、75 1,10M1,6 1,6 0,35 1,301 1,321 1,221 1,25M1,8 1,8 0,35 1,501 1,521 1,421 1,45M2 2 0,4 1,657 1,679 1,567 1,60M2,2 2,2 0,45 1,813 1,838 1,713 1,75M2,5 2,5 0,45 2,113 2,138 2,013 2,05M3 3 0,5 2,571 2,599 2,639 2,459 2,50M3,5 3,5 0,6 2,975 3,010 3,050 2,850 2,90M4 4 0,7 3,382 3,422 3,466 3,242 3,30M4,
17、5 4,5 0,75 3,838 3,878 3,924 3,688 3,70M5 5 0,8 4,294 4,334 4,384 4,134 4,20M6 6 1 5,107 5,153 5,217 4,917 5,00M7 7 1 6,107 6,153 6,217 5,917 6,00M8 8 1,25 6,859 6,912 6,982 6,647 6,80M9 9 1,25 7,859 7,912 7,982 7,647 7,80M10 10 1,5 8,612 8,676 8,751 8,376 8,50M11 11 1,5 9,612 9,676 9,751 9,376 9,50
18、M12 12 1,75 10,371 10,441 10,531 10,106 10,20M14 14 2 12,135 12,210 12,310 11,835 12,00M16 16 2 14,135 14,210 14,310 13,835 14,00M18 18 2,5 15,649 15,744 15,854 15,294 15,50M20 20 2,5 17,649 17,744 17,854 17,294 17,50M22 22 2,5 19,649 19,744 19,854 19,294 19,50M24 24 3 21,152 21,252 21,382 20,752 21
19、,00M27 27 3 24,152 24,252 24,382 23,752 24,00M30 30 3,5 26,661 26,771 26,921 26,211 26,50M33 33 3,5 29,661 29,771 29,921 29,211 29,50M36 36 4 32,145 32,270 32,420 31,670 32,00M39 39 4 35,145 35,270 35,420 34,670 35,00M42 42 4,5 37,659 37,799 37,979 37,129 37,50M45 45 4,5 40,659 40,799 40,979 40,129
20、40,50M48 48 5 43,147 43,297 43,487 42,587 43,00M52 52 5 47,147 47,297 47,487 46,587 47,00M56 56 5,5 50,646 50,796 50,996 50,046 50,50Internal threadMinor diameter for tolerance class(es)Page 4DIN 336 : 2003-07Thread sizeDrillNominalPitch, P 5H 6H 7H 5H, 6H and 7HdiameterdiameterMax. Max. Max. Min.M2
21、,5 0,35 2,5 0,35 2,201 2,221 2,121 2,15M3 0,35 3 0,35 2,701 2,721 , 2,621 2,65M3,5 0,35 3,5 0,35 3,201 3,221 3,121 3,151)M4 0,5 4 0,5 3,571 3,599 3,639 3,459 3,50M4,5 0,5 4,5 0,5 4,071 4,099 4,139 3,959 4,00M5 0,5 5 0,5 4,571 4,599 4,639 4,459 4,50M5,5 0,5 5,5 0,5 5,071 5,099 5,139 4,959 5,00M6 0,75
22、 6 0,75 5,338 5,378 5,424 5,188 5,20M7 0,75 7 0,75 6,338 6,378 6,424 6,188 6,20M8 0,75 8 0,75 7,338 7,378 7,424 7,188 7,20M9 0,75 9 0,75 8,338 8,378 8,424 8,188 8,20M10 0,75 10 0,75 9,338 9,378 9,424 9,188 9,20M11 0,75 11 0,75 10,338 10,378 10,424 10,188 10,20M8 1 8 1 7,107 7,153 7,217 6,917 7,00M9
23、1 9 1 8,107 8,153 8,217 7,917 8,00M10 1 10 1 9,107 9,153 9,217 8,917 9,00M11 1 11 1 10,107 10,153 10,217 9,917 10,00M12 1 12 1 11,107 11,153 11,217 10,917 11,00M14 1 14 1 13,107 13,153 13,217 12,917 13,00M15 1 15 1 14,107 14,153 14,217 13,917 14,00M16 1 16 1 15,107 15,153 15,217 14,917 15,00M17 1 17
24、 1 16,107 16,153 16,217 15,917 16,00M18 1 18 1 17,107 17,153 17,217 16,917 17,00M20 1 20 1 19,107 19,153 19,217 18,917 19,00M22 1 22 1 21,107 21,153 21,217 20,917 21,00M24 1 24 1 23,107 23,153 23,217 22,917 23,00M25 1 25 1 24,107 24,153 24,217 23,917 24,00M27 1 27 1 26,107 26,153 26,217 25,917 26,00
25、M28 1 28 1 27,107 27,153 27,217 26,917 27,00M30 1 30 1 29,107 29,153 29,217 28,917 29,00M10 1,25 10 1,25 8,859 8,912 8,982 8,647 8,80M12 1,25 12 1,25 10,859 10,912 10,982 10,647 10,80M14 1,25 14 1,25 12,859 12,912 12,982 12,647 12,80M12 1,5 12 1,5 10,612 10,676 10,751 10,376 10,50M14 1,5 14 1,5 12,6
26、12 12,676 12,751 12,376 12,50M15 1,5 15 1,5 13,612 13,676 13,751 13,376 13,50M16 1,5 16 1,5 14,612 14,676 14,751 14,376 14,50M17 1,5 17 1,5 15,612 15,676 15,751 15,376 15,50M18 1,5 18 1,5 16,612 16,676 16,751 16,376 16,50M20 1,5 20 1,5 18,612 18,676 18,751 18,376 18,50M22 1,5 22 1,5 20,612 20,676 20
27、,751 20,376 20,50M24 1,5 24 1,5 22,612 22,676 22,751 22,376 22,50M25 1,5 25 1,5 23,612 23,676 23,751 23,376 23,501) Not specified in ISO 235.(continued)Internal threadMinor diameter for tolerance class(es)3.2 Fine pitch seriesTable 2: Drill diameter as a function of thread dimensions (ISO metric, fi
28、ne pitch)Page 5DIN 336 : 2003-07Thread sizeDrillNominalPitch, P 5H 6H 7H 5H, 6H and 7HdiameterdiameterMax. Max. Max. Min.M26 1,5 26 1,5 24,612 24,676 24,751 24,376 24,50M27 1,5 27 1,5 25,612 25,676 25,751 25,376 25,50M28 1,5 28 1,5 26,612 26,676 26,751 26,376 26,50M30 1,5 30 1,5 28,612 28,676 28,751
29、 28,376 28,50M32 1,5 32 1,5 30,612 30,676 30,751 30,376 30,50M33 1,5 33 1,5 31,612 31,676 31,751 31,376 31,50M35 1,5 35 1,5 33,612 33,676 33,751 33,376 33,50M36 1,5 36 1,5 34,612 34,676 34,751 34,376 34,50M38 1,5 38 1,5 36,612 36,676 36,751 36,376 36,50M39 1,5 39 1,5 37,612 37,676 37,751 37,376 37,5
30、0M40 1,5 40 1,5 38,612 38,676 38,751 38,376 38,50M42 1,5 42 1,5 40,612 40,676 40,751 40,376 40,50M45 1,5 45 1,5 43,612 43,676 43,751 43,376 43,50M48 1,5 48 1,5 46,612 46,676 46,751 46,376 46,50M50 1,5 50 1,5 48,612 48,676 48,751 48,376 48,50M52 1,5 52 1,5 50,612 50,676 50,751 50,376 50,50M18 2 18 2
31、16,135 16,210 16,310 15,835 16,00M20 2 20 2 18,135 18,210 18,310 17,835 18,00M22 2 22 2 20,135 20,210 20,310 19,835 20,00M24 2 24 2 22,135 22,210 22,310 21,835 22,00M25 2 25 2 23,135 23,210 23,310 22,835 23,00M27 2 27 2 25,135 25,210 25,310 24,835 25,00M28 2 28 2 26,135 26,210 26,310 25,835 26,00M30
32、 2 30 2 28,135 28,210 28,310 27,835 28,00M32 2 32 2 30,135 30,210 30,310 29,835 30,00M33 2 33 2 31,135 31,210 31,310 30,835 31,00M36 2 36 2 34,135 34,210 34,310 33,835 34,00M39 2 39 2 37,135 37,210 37,310 36,835 37,00M40 2 40 2 38,135 38,210 38,310 37,835 38,00M42 2 42 2 40,135 40,210 40,310 39,835
33、40,00M45 2 45 2 43,135 43,210 43,310 42,835 43,00M48 2 48 2 46,135 46,210 46,310 45,835 46,00M50 2 50 2 48,135 48,210 48,310 47,835 48,00M52 2 52 2 50,135 50,210 50,310 49,835 50,00M30 3 30 3 27,152 27,252 27,382 26,752 27,00M33 3 33 3 30,152 30,252 30,382 29,752 30,00M36 3 36 3 33,152 33,252 33,382
34、 32,752 33,00M39 3 39 3 36,152 36,252 36,382 35,752 36,00M40 3 40 3 37,152 37,252 37,382 36,752 37,00M42 3 42 3 39,152 39,252 39,382 38,752 39,00M45 3 45 3 42,152 42,252 42,382 41,752 42,00M48 3 48 3 45,152 45,252 45,382 44,752 45,00M50 3 50 3 47,152 47,252 47,382 46,752 47,00M52 3 52 3 49,152 49,25
35、2 49,382 48,752 49,00M42 4 42 4 38,145 38,270 38,420 37,670 38,00M45 4 45 4 41,145 41,270 41,420 40,670 41,00M48 4 48 4 44,145 44,270 44,420 43,670 44,00M52 4 52 4 48,145 48,270 48,420 47,670 48,00Internal threadMinor diameter for tolerance class(es)Table 2 (concluded)Page 6DIN 336 : 2003-074 EG typ
36、e metric threads4.1 Coarse pitch seriesTable 3: Drill diameter as a function of thread dimensions (EG type, coarse pitch)Thread sizeMinimum majordiameter, DEGPitch, PMin. Max.Drill diameterEG M2 2,520 0,4 2,087 2,177 2,1EG M2,5 3,084 0,45 2,597 2,697 2,65EG M3 3,650 0,5 3,109 3,220 3,15EG M3,5 4,280
37、 0,6 3,630 3,755 3,7EG M4 4,910 0,7 4,152 4,292 4,2EG M5 6,040 0,8 5,174 5,334 5,25EG M6 7,300 1 6,217 6,407 6,3EG M7 8,300 1 7,217 7,407 7,3EG M8 9,624 1,25 8,271 8,483 8,4EG M10 11,948 1,5 10,324 10,560 10,5EG M12 14,274 1,75 12,379 12,644 12,5EG M14 16,598 2 14,433 14,733 14,5EG M16 18,598 2 16,4
38、33 16,733 16,5EG M18 21,248 2,5 18,541 18,896 18,75EG M20 23,248 2,5 20,541 20,896 20,75EG M22 25,248 2,5 22,541 22,896 22,75EG M24 27,897 3 24,649 25,049 24,75EG M27 30,897 3 27,649 28,049 27,75EG M30 34,546 3,5 30,757 31,207 31,0EG M33 37,546 3,5 33,757 34,207 34,0EG M36 41,196 4 36,866 37,341 37,
39、0EG M39 44,196 4 39,866 40,341 40,0EG M42 47,846 4,5 42,975 43,505 43,25EG M45 50,846 4,5 45,975 46,505 46,25EG M48 54,495 5 49,082 49,642 49,5EG M52 58,495 5 53,082 53,642 53,5Minor diameter of internal thread,D1EGPage 7DIN 336 : 2003-074.2 Fine pitch seriesTable 4: Drill diameter as a function of
40、thread dimensions (EG type, fine pitch)Thread sizeMinimum majordiameter, DEGPitch, PMin. Max.Drill diameterEG M8 1 9,300 1 8,217 8,407 8,3EG M9 1 10,300 1 9,217 9,407 9,3EG M10 1 11,300 1 10,217 10,407 10,3EG M10 1,25 11,624 1,25 10,271 10,483 10,4EG M11 1 12,300 1 11,217 11,407 11,3EG M12 1 13,300
41、1 12,217 12,407 12,3EG M12 1,25 13,624 1,25 12,271 12,483 12,4EG M12 1,5 13,948 1,5 12,324 12,560 12,5EG M14 1 15,300 1 14,217 14,407 14,3EG M14 1,25 15,624 1,25 14,271 14,483 14,4EG M14 1,5 15,948 1,5 14,324 14,560 14,5EG M15 1,5 16,948 1,5 15,324 15,560 15,5EG M16 1,5 17,948 1,5 16,324 16,560 16,5
42、EG M18 1,5 19,948 1,5 18,324 18,560 18,5EG M18 2 20,598 2 18,433 18,733 18,5EG M20 1,5 21,948 1,5 20,324 20,560 20,5EG M20 2 22,598 2 20,433 20,733 20,5EG M22 1,5 23,948 1,5 22,324 22,560 22,5EG M22 2 24,598 2 22,433 22,733 22,5EG M24 1,5 25,948 1,5 24,324 24,560 24,5EG M24 2 26,598 2 24,433 24,733
43、24,5EG M26 1,5 27,948 1,5 26,324 26,560 26,5EG M27 1,5 28,948 1,5 27,324 27,560 27,5EG M27 2 29,598 2 27,433 27,733 27,5EG M28 1,5 29,948 1,5 28,324 28,560 28,5EG M30 1,5 31,948 1,5 30,324 30,560 30,5EG M30 2 32,598 2 30,433 30,733 30,5EG M30 3 33,897 3 30,649 31,049 31,0EG M33 2 35,598 2 33,433 33,
44、733 33,5EG M33 3 36,897 3 33,649 34,049 34,0EG M36 2 38,598 2 36,433 36,733 36,5EG M36 3 39,897 3 36,649 37,049 37,0EG M39 2 41,598 2 39,433 39,733 39,5EG M39 3 42,897 3 39,649 40,049 40,0EG M42 2 44,598 2 42,433 42,733 42,5EG M42 3 45,897 3 42,469 43,049 43,0EG M42 4 47,196 4 42,866 43,341 43,0EG M
45、45 2 47,598 2 45,433 45,733 45,5EG M45 3 48,897 3 45,649 46,049 46,0EG M48 2 50,598 2 48,433 48,733 48,5EG M48 3 51,897 3 48,649 49,049 49,0Minor diameter of internal thread,D1EGPage 8DIN 336 : 2003-075 ISO inch threads5.1 Unified coarse thread (UNC)1)Table 5: Drill diameter as a function of thread
46、dimensions (UNC)1) The minor diameters of UNC and UNF threads are based on ISO 5864.Thread sizeDrillNominalPitch, P 2B1) 3B 2B and 3B1)diameterdiameterMax. Max. Min.No. 11 64 UNC 1,854 0,397 1,582 1,582 1,425 1,55No. 12 56 UNC 2,184 0,454 1,872 1,872 1,694 1,85No. 13 48 UNC 2,515 0,529 2,146 2,146 1
47、,941 2,10No. 14 40 UNC 2,845 0,635 2,385 2,385 2,156 2,35No. 15 40 UNC 3,175 0,635 2,697 2,697 2,487 2,65No. 16 32 UNC 3,505 0,794 2,896 2,896 2,642 2,85No. 18 32 UNC 4,166 0,794 3,531 3,528 3,302 3,50No. 10 24 UNC 4,826 1,058 3,962 3,950 3,683 3,90No. 12 24 UNC 5,486 1,058 4,597 4,590 4,343 4,501 1
48、/4 20 UNC 6,350 1,270 5,268 5,250 4,976 5,101 5/16 18 UNC 7,938 1,411 6,734 6,680 6,411 6,601 3/8 16 UNC 9,525 1,588 8,164 8,082 7,805 8,001 7/16 14 UNC 11,112 1,814 9,550 9,441 9,149 9,401 1/2 13 UNC 12,700 1,954 11,013 10,881 10,584 10,801 9/16 12 UNC 14,288 2,117 12,456 12,301 11,996 12,201 5/8 11 UNC 15,875 2,309 13,868 13,693 13,376 13,501 3/4 10 UNC 19,050 2,540 16,833 16,624 16,299 16,501 7/8 19 UNC 22,225 2,822 19,748 19,520 19,169 19,501 18 UNC 25,400 3,175 22,598 22,344 21,963 22,251 1/8 17 UNC 28,575 3,629 25,349 25,082 24,648 25,001 1/4 17 UNC 31,750 3,629 28,
