1、General-purpose knuckle threads Part 1 : Profiles and nominal sizes DIN - I 405-1 ICs 21.040.30 This standard, together with DIN 405-2, November 1997 edition, supersedes the November 1975 edition of DIN 405-1. Rundgewinde allgemeiner Anwendung - Teil 1 : Gewindeprofile, Nennmae In keeping with curre
2、nt practice in standards published by the International Organization for Standardization (ISO), a comma has been used throughout as the decimal marker. Foreword This standard has been prepared by the Normenausschu Technische Grundlagen (Fundamentals in Tech- nology Standards Committee), Technical Co
3、mmittee Grundlagen. Amendments The following amendments have been made to the January 1983 edition. a) The basic profile is no longer specified. b) Some symbols have been changed. c) Values for ac have been introduced. d) The standard has been editorially revised. Previous editions DIN 405: 1922-04,
4、 1928-04, 1953-01; DIN 405-1: 1975-1 1. Dimensions in mm 1 Scope and field of application This standard specifies profiles and dimensions of general purpose internal and external knuckle threads. See DIN 405-2 for fundamental deviations and tolerances and DIN 405-3 for gauges for external and intern
5、al threads. Continued on pages 2 to 6. Translation by DI N-Sprachendienst. In case of doubt, the German-language original should be consulted as the authoritative text. No part of this translation may be reproduced without the prior permission of Ref. No. DIN 405-1 : 1997-1 hl Deutsches Institut fr
6、Nonung e. V., Berlin. buth Verlag GmbH, D-10772 Berlin, has the exclusive right of sale for German Standards (DIN-Normen). English price group 07 Sales No. 0107 12.98 Page 2 DIN 405-1 : 1997-1 1 a, d 2 Normative references This standard incorporates, by dated or undated reference, provisions from ot
7、her publications. These norma- tive references are cited at the appropriate places in the text and 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 amendment or
8、 revision. For undated references, the latest edition of the publication referred to applies. DIN 405-2 General purpose knuckle threads -Tolerances DIN 405-3 General purpose knuckle threads -Gauges for external and internal threads - Types, profiles and tolerances DIN 2244 Screw threads - Terminolog
9、y Crest clearance Major diameter of external thread 3 Concepts and symbols 3.1 Concepts For the purposes of this standard, the concepts defined in DIN 2244 shall apply. 3.2 Symbols See table 1 D2 D4 Table 1 : Symbols Pitch diameter of internal thread Major diameter of internal thread Symbol I Quanti
10、ty I P Ph Lead of single-start thread and pitch of multi-start thread Lead of multi-start thread d, I Pitch diameter of external thread I HI RI R2 R3 y1 d3 I Minor diameter of external thread I Flank overlapping Crest radius or root radius of external thread Crest radius of internal thread Root radi
11、us of internal thread Number of threads D, I Minor diameter of internal thread I es I Fundamental deviation of external thread (upper deviation) I H I Height of fundamental triangle I h3= H4 I Height of threads I 4 Design profiles External and internal knuckle threads as specified in this standard d
12、o not have the same design profile. External threads have the same radii at the crest and at the root, while internal threads have different radii. The major, pitch and minor diameters are based on the design profile. Page 3 DIN 405-1 : 1997-1 1 ac =0,05P HI =O,O835P DI =D4-2H,=D,-P=d-0,9P h, =H4=0,
13、5P D, RI = 0,238507 P d, =DZ=d-0,5P R, = 0,255967 P d, =d-P R, = 0,221 047 P H = 1,866025 P H/2 =O,933P = d + 2a, = d + 0,l P Figure 1: Design profiles for external and internal threads (with crest clearance, but without fundamental deviation) (notation) Table 2: Design profiles 5 Design profiles fo
14、r threads with fundamental deviation Design profiles for threads with fundamental deviation are shown in figure 2 Figure 2: Profiles for external and internal threads with fundamental deviation es and crest clearance (notation) Page 4 DIN 405-1 : 1997-1 1 Figure 3: Flank overlapping (notation) 6 Pro
15、files for multi-start threads Multi-start threads have the same profile as single-start threads if the pitch of the former is equal to the lead of the latter. The pitch, P, of multi-start threads shall be selected from the values specified in table 3 for the lead of single-start threads. The lead, P
16、h, of multi-start threads shall be determined by multiplying the pitch by the number of threads (.e. Ph = P X n), whereby Ph does not have to be equal to one of the values given for P in table 3. Figure 4: Profile for double-start threads 7 Designation Knuckle threads as specified in this standard a
17、re to be designated as specified in DIN 405-2. 8 Nominal sizes Nominal sizes are specified in table 3. Series 1 diameters should be given preference. Page 5 DIN 405-1 : 1997-1 1 Nominal thread diameter, d Series 1 Series 2 8 9 10 11 12 14 16 18 20 22 24 26 28 30 32 36 40 44 48 52 55 34 38 42 46 50 5
18、8 Number of Lead Pitch Major Minor diameters, threads, (or pitch) diameter, diameter, per 25,4 mm P d, = D, D4 d3 Dl 10 2,54 6,73 8,254 5,46 5,714 10 2,54 7,73 9,254 6,46 6,714 10 2,54 8,73 10,254 7,46 7,714 10 2,54 9,73 11,254 8,46 8,714 10 2,54 10,73 12,254 9,46 9,714 8 3,175 12,412 14,318 10,825
19、11,142 8 3,175 14,412 16,318 12,825 13,142 8 3,175 16,412 18,318 14,825 15,142 8 3,175 18,412 20,318 16,825 17,142 8 3,175 20,412 22,318 18,825 19,142 8 3,175 22,412 24,318 20,825 21,142 8 3,175 24,412 26,318 22,825 23,142 8 3,175 26,412 28,318 24,825 25,142 8 3,175 28,412 30,318 26,825 27,142 8 3,1
20、75 30,412 32,318 28,825 29,142 8 3,175 32,412 34,318 30,825 31,142 8 3,175 34,412 36,318 32,825 33,142 8 3,175 36,412 38,318 34,825 35,142 6 4,233 37,883 40,423 35,767 36,19 6 4,233 39,883 42,423 37,767 38,19 6 4,233 41,883 44,423 39,767 40,19 6 4,233 43,883 46,423 41,767 42,19 6 4,233 45,883 48,423
21、 43,767 44,19 6 4,233 47,883 50,423 45,767 46,19 6 4,233 49,883 52,423 47,767 48,19 6 4,233 52,883 55,423 50,767 51,19 6 4,233 55,883 58,423 53,767 54,19 60 65 70 75 80 85 90 95 1 O0 110 120 130 6 4,233 57,883 60,423 55,767 56,19 62 6 4,233 59,883 62,423 57,767 58,19 6 4,233 62,883 65,423 60,767 61,
22、19 68 6 4,233 65,883 68,423 63,767 64,19 6 4,233 67,883 70,423 65,767 66,19 72 6 4,233 69,883 72,423 67,767 68,19 6 4,233 72,883 75,423 70,767 71,19 78 6 4,233 75,883 78,423 73,767 74,19 6 4,233 77,883 80,423 75,767 76,19 82 6 4,233 79,883 82,423 77,767 78,19 6 4,233 82,883 85,423 80,767 81,19 88 6
23、4,233 85,883 88,423 83,767 84,19 6 4,233 87,883 90,423 85,767 86,19 92 6 4,233 89,883 92,423 87,767 88,19 6 4,233 92,883 95,423 90,767 91,19 98 6 4,233 95,883 98,423 93,767 94,19 6 4,233 97,883 100,423 95,767 96,19 105 4 6,35 1 01,825 105,635 98,65 99,285 4 6,35 106,825 11 0,635 103,65 104,285 115 4
24、 6,35 11 1,825 11 5,635 108,65 109,285 4 6,35 11 6,825 120,635 11 3,65 11 4,285 125 4 6,35 121,825 125,635 11 8,65 11 9,285 4 6,35 126,825 130,635 123,65 124,285 I 135 I 4 I 6,35 I 131,825 I 135,635 I 128,65 I 129,285 (continued) Page 6 DIN 405-1 : 1997-1 1 Nominal thread diameter, d Series 1 Series
25、 2 140 150 160 145 155 165 170 180 190 200 175 185 195 Table 3 (concluded) Number of Lead Pitch Major Minor diameters, threads, (or pitch) diameter, diameter, per 25,4 mm P d, = D, D4 d3 Dl 4 6,35 136,825 140,635 133,65 134,285 4 6,35 141,825 145,635 138,65 139,285 4 6,35 146,825 150,635 143,65 144,
26、285 4 6,35 151,825 155,635 148,65 149,285 4 6,35 156,825 160,635 153,65 154,285 4 6,35 161,825 165,635 158,65 159,285 4 6,35 166,825 170,635 163,65 164,285 4 6,35 171,825 175,635 168,65 169,285 4 6,35 176,825 180,635 173,65 174,285 4 6,35 181,825 185,635 178,65 179,285 4 6,35 186,825 190,635 183,65 184,285 4 6,35 191,825 195,635 188,65 189,285 4 6,35 196,825 200,635 193,65 194,285
