1、UDC 621.833.1 DEUTSCHE NORMEN May 1977 Series of Modules for Gears Modules for Spur Gears - DIN 780 Part 1 Modulreihe fr Zahnrder; Moduln fr Stirnrder Modules m in mm Series I Series II 0.05 . _-_- _ For connection with the International Standard IS0 54 - 1977 issued by the International Organizatio
2、n for Standardization (ISO), see Explanations. This Standard is applicable to spur gears and helical gears of all kinds, e.g. to gears for precision engineering and general mechanical engineering, and also to motor vehicle gears and havy engineering gears. The modules listed in the Table apply to th
3、e normal sections of spur gears according to DIN 3960 and of corresponding helical gears (see DIN 868). -. .- - . 0.1 1 _p-.-.i-_ 0,12 0,14 - Table I. 0,3 -. - 0,35 Modules m in mm Series I I Series II _ 4 0,45 0,5 0.6 0,55 0,65 . 0.7 0.75 _- O ,8 . 0.85 ._ . 1 O“ 1 0.95 -I . . .- .+ I 1,125 1,25 ,
4、5 I 1,375 _ _._ . -I -_ 1_.75 , I 2,25 2,5 2.75 Modules m in mm I serrs I 1 Series 11 I Modules m in mm 1 I i 22 I +.- 4 I i 28 I I 1 (30) I I i (39) I c-A I 40 I I I I 50 I I I I 1 t-=+I I 70 1 Note: The modules of series I should be given preference to the modules of series II. The modules featur
5、ed in brackets in series II are intended for special purposes. Further Standards DIN DIN 3960 DIN 58405 Part 1 780 Part 2 Series of modules for gears; modules for cylindrical worm gears Definitions and specification factors for cylindrical gears and cylindrical gear pairs with involute teeth Spur ge
6、ar drives for precision engineering; scope, definitions, principle design data, classification Explanations on page 2 DIN 780 Teil 1 engl. Preisgr. 4 Vertr.-Nr. 0104 Solesale rights of German Standards (DIN-Normen) are with Beuth Verlag GmbH, Berlin 30 and Kln 1 04.80 Page 2 DIN 780 Part 1 Explanati
7、ons The modules of series I and I I laid down in this Standard for spur gears according to DIN 3960 and for corres- ponding helical gears (see DIN 868) coincide in the m = 1 mm to m = 50 mm range with the metric modules of the International Standard IS0 54 - 1977 “Modules and Diametral Pitches for S
8、pur Gears for General Engineering and Heavy Engineering“, with the exception of the values 3.25; 3.75; 4.25; 4.75; 5.25; 5.75; 27; 30; 39 and 42. Modules above 50 mm and below 1 mm are not featured in the International Standard IS0 54 - 1977 The modules are subdivided into the preferred series I and
9、 the secondary series II. This preferential arrangement is intended to achieve a limitation of the numbers of tools and inspection gauges required in the workshops for the manufacture of spur gears. In the February 1967 issue of DIN 780, an additional series had been provided for an even more closel
10、y stepped graduation of module values in the module range above 3 mm, with a note to the effect that this additional series would be deleted from the Standard at a future date. In the present Standard, only the values featured in brackets have been retained from this additional series for certain ap
11、plications, e.g. for motor Comparison between the modules and tt Module Diametral Pitch I 0.1 2 200 0,12700 180-p-p 0,141 11 160 0,15875 0,14 _ 0,16 0,18 0.2 0.22 -i - O, 1 81 43- 140 7 120 0.21 167 _. - 0,25 0.28 03 1 O0 0,25400 80 0,31750 0.35 vehicle construction, the values 3.25; 3.75; 4.25; 4.7
12、5; 5.25; 5.75; 6.5, and for heavy engineering the values 27; 30; 39 and 42. Apart from the 6.5 mm value, these modules in brackets are not featured in the International Standard IS0 54 - 1977. In Anglo-Saxon countries, the Diametral Pitch is still in use today in lieu of the module. The Internationa
13、l Standard IS0 54 - 1977 therefore features a Diametral Pitch Series side by side with the Module Series, with a note to the effect that the Diametral Pitches are only given on a provisional basis, and that they will be deleted after.the period necessary to allow conversion to the metric system. The
14、 relationship below exists between the module m in mm and the Diametral Pitch P in l/inch 25.4 25.4 P rn m=-.P=- The Diametral Pitch Values do not give round figures when converted into module values. In the Table below, the modules according to this Standard from 0.12 to 50 mm are listed face to fa
15、ce with the Diametral Pitch Values contained in the International Standard IS0 54 - 1977 or British Standard 978 respectively. ! Diametral Pitch Values converted into Module 1 Diametral Pitch 1 I l 1.125 I -_ . nr I ._ 1.5 1.75 1,58750 16 14 1,81429 _. _- +-+-m- _ _ 2.25 23 2,75 11 2,30909 10 2,54000 9 2.82222 mm
