1、 DEUTSCHE NORM July 2003DIN 802-6 ICS 25.100.50 Part 6: Ground taps for tapped holes (EG) for wire thread inserts as in DIN 8140 for ISO metric coarse and fine pitch threads Toleranzen des Gewindeteiles von Gewindebohrern Teil 6: Geschliffene Gewindebohrer fr das Aufnahmegewinde (EG) fr Gewindeeinst
2、ze aus Draht nach DIN 8140 fr Metrisches ISO-Regel- und Feingewinde; Fertigungstoleranzen des Gewindeteiles Document comprises 10 pagesTranslation by DIN-Sprachendienst. In case of doubt, the German-language original should be consulted as the authoritative text. No part of this translation may be r
3、eproduced without prior permission of DIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany, has the exclusive right of sale for German Standards (DIN-Normen). English price group 8 www.din.de www.beuth.de !,k9“07.06 9722299Manufacturing tolerances on the threaded
4、 portion of screwing taps toDIN 802-6:2003-07 2 Foreword This standard has been prepared by the Normenausschuss Werkzeuge und Spannzeuge (Tools and Clamping Devices Standards Committee), Technical Committee A 4 Gewindebohrer und Schneideisen. 1 Scope This standard specifies the manufacturing toleran
5、ces for the threaded portion of screwing taps designed for producing tapped holes (EG) for wire thread inserts for ISO metric threads of tolerance classes 6H mod and 6G mod as in DIN 8140-1 and DIN 8140-2. 2 Normative references This standard incorporates, by dated or undated reference, provisions f
6、rom other publications. These normative references are cited at the appropriate places in the text, and the titles of the publications are listed below. For dated references, subsequent amendments to or revisions of any of these publications apply to this standard only when incorporated in it by ame
7、ndment or revision. For undated references, the latest edition of the publication referred to (including amendments) applies. DIN 2197, High-speed steel taps with ground threads Technical delivery conditions DIN 8140-1, Wire thread inserts for ISO metric screw threads Part 1: Dimensions and technica
8、l delivery conditions DIN 8140-2, Wire thread inserts for ISO metric screw threads Part 2: Tapped holes for thread inserts, thread tolerances DIN EN 22857, Ground screwing taps for ISO metric threads of tolerances 4H to 8H and 4G to 6G coarse and fine pitches Manufacturing tolerances on the threaded
9、 portion (ISO 2857:1973 + AMD 1:1984 + AMD 2:1986) DIN ISO 965-1, ISO general purpose metric screw threads Tolerances Part 1: Principles and basic data (ISO 965-1:1998) 3 Symbols and quantities 3.1 Thread profile (internal thread) EI Fundamental deviation DEGBasic major diameter D1EGBasic minor diam
10、eter D2EGBasic pitch diameter H Height of fundamental triangle DIN 802-6:2003-07 3 P Pitch TD1 EGTolerance on minor diameter TD2 EGTolerance on pitch diameter Thread angle 3.2 Thread profile of taps d Basic major diameter (d = DEG) dminMinimum major diameter d2Basic pitch diameter (d2= D2 EG) d2 max
11、Maximum pitch diameter d2 minMinimum pitch diameter Em Lower deviation of pitch diameter Es Upper deviation of pitch diameter Js Minimum clearance on major diameter P Pitch R = H/6 Root radius Td2Tolerance on pitch diameter Thread angle /2 Flank angle 4 General specifications 4.1 The tolerances for
12、the threaded portion of taps are based on the tolerances specified in DIN 8140-2. For tapped holes, tolerances smaller than given in DIN ISO 965-1 have been specified. To indicate these modified tolerances, mod has been added to the tolerance symbol. The formulae for calculating the tolerances and l
13、imit deviations for the tap major and pitch diameters given in clauses 5 and 6 take into account the particular conditions prevailing for tapped holes. Size and position of tolerances zones on the threaded portion of the tap and those of the internal thread are illustrated in figure 1. The internal
14、thread shown is of tolerance class H. DIN 802-6:2003-07 4 Tolerance zone of internal thread Tolerance zone of tap Key 1 Internal thread, tolerance class H 2 Tap Figure 1 Dimensions and tolerances for threaded portion of internal thread and tap (notation) 4.2 In accordance with DIN 8140-2, only toler
15、ance classes 6H mod and class 6G mod are standardized for tapped holes. This has been taken into account in this standard for the tolerance classes for taps (see table 1). The symbol denoting the tolerance class (e.g. 6H mod) is part of the designation of machine taps. Details regarding the designat
16、ion structure are given in DIN 2197. Table 1 Tolerance classes for taps and tapped holes Tolerance class for tap Tolerance class for tapped hole (internal thread without wire thread insert) 6H mod 6H mod 6G mod 6G mod 5 Tolerances on tap pitch diameter The size and position of tolerance zones shall
17、be as shown in figure 2. Limit deviations and limits of sizes shall be calculated using the formulae given in table 2. DIN 802-6:2003-07 5 Tap, tolerance position HTapped hole (internal thread) Tap, tolerance position Gad2is equal to D2 EGof the tapped hole as in DIN 8140-2 (= D2 EGmin of tolerance
18、position H) bTd2= Es Em Figure 2 Size and position of tolerances zones of pitch diameter of internal thread and tap Table 2 Formulae for calculating limit deviations and limits of sizes for tap pitch diameter, d2Tolerance class of tap Position of tolerance zones Formulae 6H mod Key 1 Thread toleranc
19、e zone 6H mod Em = 0,2 TD2 EGEs = 0,44 TD2 EGd2 min= d2+ Em d2 max= d2+ Es 6G mod Key 1 Thread tolerance zone 6G mod Em = 0,2 TD2 EGEs = 0,44 TD2 EGEI = fundamental deviation G as in DIN ISO 965-1 d2 min= d2+ EI + Em d2 max= d2+ EI + Es DIN 802-6:2003-07 6 6 Tolerances on tap major diameter The size
20、 and position of tolerance zones shall be as shown in figure 3. Limit deviations and limits of sizes shall be calculated using the formulae given in table 3. For the tap major diameter, only the minimum clearance, Js, and the minimum major diameter, dmin, are specified. The maximum major diameter an
21、d thus the shape of the tap are optional. The minimum clearance on the major diameter, Js, is equal to the upper deviation of pitch diameter, Es. Tap, tolerance position H Tapped hole (internal thread) Tap, tolerance position G ad is equal to DEGof the tapped hole as in DIN 8140-2 (= DEG minof toler
22、ance position H) Figure 3 Position of tolerance zones of major diameter of internal thread and tap DIN 802-6:2003-07 7 Table 3 Formulae for calculating the minimum clearance on the tap major diameter, Js, and minimum tap major diameter, dmin Tolerance class of tap Position of tolerance zones Formula
23、e 6H mod Key 1 Thread tolerance zone 6H mod Js = 0,44 TD2 EGdmin= d + Js 6G mod Key 1 Thread tolerance zone 6G mod Js = 0,44 TD2 EGEI = fundamental deviation G as in DIN ISO 965-1 dmin= d + EI + Js 7 Tap minor diameter and limit deviations for flank angle and pitch The values and specifications give
24、n in DIN EN 22857 shall apply. 8 Limit deviations Em, Es, and Js and dimensions of tap major and pitch diameters The values for tap tolerance class 6H mod are given in tables 4 and 5. The values for tap tolerance class 6G mod shall be obtained by adding the values of the relevant dimensions for tole
25、rance position G. DIN 802-6:2003-07 8 Table 4 Limit deviations and dimensions of threaded portion for coarse pitch threads Nominal dimensions Limit deviations Dimensions of threaded portion Major diameter Pitch diameter Em Es dmind2 mind2 maxDEGD2 EGJs Thread size Pitch P mm mm mm m m mm mm mm EG M2
26、 0,4 2,520 2,260 +10 +22 2,542 2,270 2,282 EG M2,5 0,45 3,084 2,792 +11 +24 3,108 2,803 2,816 EG M3 0,5 3,650 3,325 +12 +26 3,676 3,337 3,351 EG M3,5 0,6 4,280 3,890 +14 +30 4,310 3,904 3,920 EG M4 0,7 4,910 4,455 +15 +33 4,943 4,470 4,488 EG M5 0,8 6,040 5,520 +15 +34 6,074 5,535 5,554 EG M6 1 7,30
27、0 6,650 +18 +40 7,340 6,668 6,690 EG M7 1 8,300 7,650 +18 +40 8,340 7,668 7,690 EG M8 1,25 9,624 8,812 +20 +44 9,668 8,832 8,856 EG M10 1,5 11,948 10,974 +23 +51 11,999 10,997 11,025 EG M12 1,75 14,274 13,137 +27 +59 14,333 13,164 13,196 EG M14 2 16,598 15,299 +29 +64 16,662 15,328 15,363 EG M16 2 1
28、8,598 17,299 +29 +64 18,662 17,328 17,363 EG M18 2,5 21,248 19,624 +31 +68 21,316 19,655 19,692 EG M20 2,5 23,248 21,624 +31 +68 23,316 21,655 21,692 EG M22 2,5 25,248 23,624 +31 +68 25,316 23,655 23,692 EG M24 3 27,897 25,948 +37 +82 27,979 25,985 26,030 EG M27 3 30,897 28,948 +37 +82 30,979 28,985
29、 29,030 EG M30 3,5 34,546 32,273 +40 +88 34,634 32,313 32,361 EG M33 3,5 37,546 35,273 +40 +88 37,634 35,313 35,361 EG M36 4 41,196 38,598 +42 +93 41,289 38,640 38,691 EG M39 4 44,196 41,598 +42 +93 44,289 41,640 41,691 EG M42 4,5 47,846 44,923 +45 +99 47,945 44,968 45,022 EG M45 4,5 50,846 47,923 +
30、45 +99 50,945 47,968 48,022 EG M48 5 54,495 51,247 +48 +106 54,601 51,295 51,353 EG M52 5 58,495 55,247 +48 +106 58,601 55,295 55,353 The limit deviations Em, Es and Js and the dimensions of the threaded portion for fine pitch threads are given in table 5. DIN 802-6:2003-07 9 Table 5 Limit deviation
31、s and dimensions of threaded portion for fine pitch threads Nominal dimensions Limit deviations Dimensions of threaded portion Major diameter Pitch diameter Em Es dmind2 mind2 maxDEGD2 EGJs Thread size PitchP mm mm mm m m mm mm mm EG M8 1 1 9,300 8,650 +18 +40 9,340 8,668 8,690 EG M9 1 1 10,300 9,65
32、0 +18 +40 10,340 9,668 9,690 EG M10 1 1 11,300 10,650 +18 +40 11,340 10,668 10,690 EG M10 1,25 1,25 11,624 10,812 +20 +44 11,668 10,832 10,856 EG M11 1 1 12,300 11,650 +18 +40 12,340 11,668 11,690 EG M12 1 1 13,300 12,650 +20 +44 13,344 12,670 12,694 EG M12 1,25 1,25 13,624 12,812 +23 +50 13,674 12,
33、835 12,862 EG M12 1,5 1,5 13,948 12,974 +25 +55 14,003 12,999 13,029 EG M14 1 1 15,300 14,650 +20 +44 15,344 14,670 14,694 EG M14 1,25 1,25 15,624 14,812 +23 +50 15,674 14,835 14,862 EG M14 1,5 1,5 15,948 14,974 +25 +55 16,003 14,999 15,029 EG M15 1,5 1,5 16,948 15,974 +25 +55 17,003 15,999 16,029 E
34、G M16 1,5 1,5 17,948 16,974 +25 +55 18,003 16,999 17,029 EG M18 1,5 1,5 19,948 18,974 +25 +55 20,003 18,999 19,029 EG M18 2 2 20,598 19,299 +29 +64 20,662 19,328 19,363 EG M20 1,5 1,5 21,948 20,974 +25 +55 22,003 20,999 21,029 EG M20 2 2 22,598 21,299 +29 +64 22,662 21,328 21,363 EG M22 1,5 1,5 23,9
35、48 22,974 +25 +55 24,003 22,999 23,029 EG M22 2 2 24,598 23,299 +29 +64 24,662 23,328 23,363 EG M24 1,5 1,5 25,948 24,974 +27 +59 26,007 25,001 25,033 EG M24 2 2 26,598 25,299 +31 +68 26,666 25,330 25,367 EG M26 1,5 1,5 27,948 26,974 +27 +59 28,007 27,001 27,033 EG M27 1,5 1,5 28,948 27,974 +27 +59
36、29,007 28,001 28,033 EG M27 2 2 29,598 28,299 +31 +68 29,666 28,330 28,367 EG M28 1,5 1,5 29,948 28,974 +27 +59 30,007 29,001 29,033 EG M30 1,5 1,5 31,948 30,974 +27 +59 32,007 31,001 31,033 EG M30 2 2 32,598 31,299 +31 +68 32,666 31,330 31,367 EG M30 3 3 33,897 31,948 +37 +82 33,979 31,985 32,030 E
37、G M33 2 2 35,598 34,299 +31 +68 35,666 34,330 34,367 EG M33 3 3 36,897 34,948 +37 +82 36,979 34,985 35,030 EG M36 2 2 38,598 37,299 +31 +68 38,666 37,330 37,367 EG M36 3 3 39,897 37,948 +37 +82 39,979 37,985 38,030 EG M39 2 2 41,598 40,299 +31 +68 41,666 40,330 40,367 EG M39 3 3 42,897 40,948 +37 +8
38、2 42,979 40,985 41,030 EG M42 2 2 44,598 43,299 +31 +68 44,666 43,330 43,367 EG M42 3 3 45,897 43,948 +37 +82 45,979 43,985 44,030 EG M42 4 4 47,196 44,598 +42 +93 47,289 44,640 44,691 EG M45 2 2 47,598 46,299 +31 +68 47,666 46,330 46,367 EG M45 3 3 48,897 46,948 +37 +82 48,979 46,985 47,030 EG M48
39、2 2 50,598 49,299 +33 +73 50,671 49,332 49,372 EG M48 3 3 51,897 49,948 +40 +88 51,985 49,988 50,036 DIN 802-6:2003-07 10 Bibliography DIN 802-4, Ground thread taps for ISO metric threads of tolerances 7G, 8G and special tolerances, coarse and fine pitches Manufacturing tolerances on the threaded portion DIN 8140-3, Wire thread inserts for ISO metric screw threads Gauges and gauge sizes
