1、DEUTSCHE NORM April 1985 UDC 621.882.082.5 I Metric buttress threads Thread profiles I 513 Part 1 Metrisches Sagengewinde; Gewindeprof ile Supersedes January 1975 edition. In keeping with current practice in standards published by the International Organization for Standardization (ISO), a comma has
2、 been used throughout as the decimal marker. Dimensions in mm 1 Basic profile The basic profile is the theoretical profile associated with the basic sizes of the major, pitch and minor diameters. The minor diameter clearance and the clearance between the non-stressed thread flank (see clause 2) and
3、the fundamental deviations of the pitch diameter of the stressed thread flank (see clause 3) are related to these basic sizes. II“ I i Axis of screw thread 1 -7 D = d = major diameter of screw thread D, = d, = pitch diameter of screw thread D, = d, = minor diameter of screw thread P = Lead of single
4、-start screw thread and pitch of multiple-start screw thread H = height of fundamental triangle H, = height of basic profile w = profile width Figure 1. Basic profile Continued on pages 2 io 4 Beuth Verlag GmbH. Berlin 30, has euciusive sale rights for German Standards (DIN-Normeni DIN 513 Part 1 En
5、gl. Price group 5 01.86 Sales No. 0105 Page 2 DIN 513 Part 1 Table 1. Dimensions of basic prof le Pitch H HJ2 Hl P 1,5878 P 0,7939 P 0,75 P 2 3,1756 1,5878 1,50 3 4,7634 2,381 7 2,25 4 6,351 2 3.1 756 3,OO 5 7,9390 3,9695 3,75 6 9,5268 4.7634 4.50 7 11,1146 5,5573 5,25 8 12,7024 6,351 2 6,OO 9 14,29
6、02 7,1451 6,75 10 15,8780 7,9390 7.50 12 19,0536 9,5268 9,00 14 22,2292 11,1146 10,50 16 25,4048 12,7024 12,oo 18 28,5804 14,2902 13,50 20 31,7560 15,8780 15.00 16,50 22 34,9316 17,4658 24 38,1072 19,0536 18,OO 28 44,4584 22,2292 21,oo 32 50,8096 25,4048 24,OO 36 57,1608 28,5804 27,OO 40 63,5120 31,
7、7560 30,OO 44 69,8632 34,9316 33,OO W 0,26384 P 0,52768 0,79152 1,05536 1,31920 1,58304 1,84688 2, 1072 2,37456 2,63840 3.1 6608 3,69376 4,22 144 4,749 1 2 5.27680 5,80448 6,332 16 7,38752 8,44288 9,49824 10,55360 1 1,60896 2 Nominal profiles The nominal profiles to which the deviations and toleranc
8、es are related have specified clearances on the minor diameter and between the non-loadbearing thread flanks, relative to the basic profile (see figure 1). 1 III H, = 0,75P h, = H, + ac = 0,86777 P a = O,I fi (axial clearance) a, = 0,11777P w =O,26384P e R =O,12427P = 0,26384 P - 0,l = w -a a N D, =
9、d - W, = d - 1.5 P - n d, =d-2h3 O D, =d-0.75P+3,1758.a (o E d, = d - 0.75 P z Figure 2. Profiles for external and internal threads with clearances on the non-loadbearing flank on the minor diameter but with no clearance between the loadbearing flanks or on the major diameter (nominal sizes) 1) The
10、index c stands for crest. DIN 513 Part 1 Page 3 P a, 2 0,236 3 0,353 4 0.47 1 5 0,589 6 0,707 7 0,824 8 0,942 9 1,060 10 1,178 12 1,413 14 1,649 16 1,884 18 2,120 20 2,355 22 2,591 24 2,826 28 3,298 32 3,769 36 4,240 40 4,711 44 5,182 a e R 0,1414 0,386 1,736 0,249 0,1732 0,618 2,603 0,373 02 0,855
11、3,471 0,497 0,2236 1,096 4,339 0,621 0,2449 1,338 5,207 0,746 0,2646 1,582 6,074 0,870 0,2828 1,828 6,942 0,994 0,3 2,075 7,810 1,118 0,3 162 2,322 8,678 1,243 0,3464 2,820 10,413 1,491 0,3742 3,320 12,149 1,740 0.4 3,821 13,884 1,988 0,4243 4,325 15,620 2,237 0,4472 4,830 17,355 2,485 0,4690 5,335
12、19,091 2,734 0,4899 5,842 20,826 2,982 0,5292 6,858 24,298 3,480 0,5657 7,877 27,769 3,977 0,6 8,898 3 1,240 4,474 h3 0,6325 9,921 34,7 1 1 4,97 1 0,6633 10,946 38,182 5,468 3 Profiles of threads with clearance on the flank The profiles with clearance on the flank result from the nominal profiles an
13、d the fundamental deviation for the pitch diameter of the loadbearing flank. 7 s = 0,31494, A, = fundamental deviation (= upper deviation) for external thread on pitch diameter For the other dimension letters, see figure 2. Figure 3. Profiles for external and internal threads with clearances on the
14、minor diameter and on the flank (standard nut system) but with no clearance on the major diameter Page 4 DIN 513 Part 1 4 Profiles for multiple-start threads (The profile shown is of a double-start thread) 1 P,= lead (axial advance P = pitch (axial distance between at one turn) two neighbouring flan
15、ks being in the same direction) Figure 4. Profiles for multiple-start threads Multiple-start (n-start) threads have the same profile as single-start threads with lead Ph = pitch P. For the pitch P of multiplestart threads, only the values permitted for the lead P (which is equal to pitch P) of singl
16、estart threads may be selected. However, the multiple of the pitch P of multiple-start threads need not correspond to the value permitted for single-start threads. Other relevant standards DIN DIN 513 Part 2 Metric buttress threads; general plan DIN 513 Part 3 Metric buttress threads; deviations and
17、 tolerances DIN 2244 Screw threads; concepts 13 Part 14 IS0 metric screw threads; principles of a tolerance system for screw threads from 1 mm diameter up- wards Previous editions DIN 513: 10.25,01.27x DIN 514 Part 1: 10.25,01.27xx DIN 514 Part 2: 10.25,01.27x DIN 515: 10.25,01.27xx DIN 513 Part 1:
18、01.75 Amendments The following amendments have been made in comparison with the January 1975 edition: a) The status of the standard is no longer that of a preliminary standard. b) In figure 2, D2 has been associated with an additional pitch diameter line and an extended formula for D2 has been c) Th
19、e standard has been editorially revised. included (see Explanatory notes). Explanatory notes DIN 513 Part 1 to Part 3 were submitted to ISO/TC 1/SC 3 as a German proposal for a corresponding IS0 Standard. As it was not possible to agree to DIN Standards being adopted without amendment as IS0 Standar
20、ds, DIN 513 Part 1 to Part 3 were published as preliminary standards. Meanwhile, the interest of the ISO/TC 1 member bodies in an IS0 Standard on buttress threads waned, mainly because there seemed to be no prospects of harmonizing the national stand- ards of the individual countries on buttress thr
21、eads. Finally, ISO/TC 1 decided to stop work on this item. DIN 513 Part 1 to Part 3 have proved successful in Germany; only minor amendments have been necessary. Just the dimensioning and the formula for the pitch diameter of the internal thread, D2, in figure 2 of DIN 513 Part 1 did not correspond
22、to the pitch diameter definition in DIN 2244. The pitch diameter of the basic profile corresponding to the pitch diameter of the external thread had also been adopted as the reference diameter for the internal thread although, because of the axial clearance a, the pitch diameter of the internal thre
23、ad is greater by sin 30 sin 147O 2. cos 3O - . tan 60 .a = 3,17582 .a than that of the external thread. This error lead to unnecessary conversions having to be made, e.g. when measuring thread adjustment gauges or plain plug gauges using the three-wire method. International Patent Classification F 16 B 33/02
