1、I mX: 621.934 DEUTSCHE NORMEN August 1970 $9 115 4 w da 118 O I m 50 63 80 100 125 160 200 250 315 13 16 22 22 22 32 32 32 40 25 32 36 40 40 63 63 63 80 Pitch t and number of teeth o P o E x C .- 0 .- E DIN 7838 Circular Metal Slitting.Saw Blades Coarse-toothed Metallkreissgebltter; grobgezahnt Por
2、connection with the working results by ISO/TC 29, aee Explanations. Dimensions in mai Details left unspecified are to be designed as appropriate. Designation of a coarse-toothed circular metal slitting saw blade of diameter dq = 160 um, width b = 3 nun, tooth form B according to DIB 1840, tool type
3、N, in super-speed steel (FES): Circular slitting saw blade 160 x 3 BT DIN 1838 - HSS Table 1 I b 111 /I 0.0 t 315 k - 3,15 4 - 4 4 5 - 485 405 405 325 405 5 325 406,3406,3486,3648648 808100 5 3263 32 63 40 6,348 8 48 8 64 8 8010 8010 100 I 1 . I I I I I I I I I 3 4 5 43 24 6,3 32 63 40 8 40 8 48 8 6
4、410 6410 8010 100 63 24 63 32 8 32 8 40 8 48 10 48 10 64 10 80 123 80 63 24 8 24 8 32 8 40 10 u) 10 48 10 64 125 64 125 80 Continued on page 2 Explanations on page 2 Ileinverkauf der Normbltter dur& Beuth-Vertrieb GmbH, Berlin 30 und Kln DIN 1838 engl. Preisgr. Page 2 DIN 1838 4 200 250 31 5 Ma4ezPa
5、li -&pig&: High speed steel (SS) or super-speed steel (HSS) Conventional finish: Tool type N according to DIN 1836 and tooth form B according to DIN 1840 Special finish: Tool type E or W Side clearance and manufacturing tolerances according to DIN IWO. Circular metal slitting saw blades up to 160 mm
6、 outside diameter may be supplied with or without collar at the manufacturers choice. Circular metal slitting saw blades of 200, 2 O and 315 mm outside diameter are also avaii- able in special finish with driving holes (M! for circular cold saws according to DIN 55084 Sheet 1. The designation in suc
7、h cases is, e.g.: Tooth forms Bw and C (only for bL2 mm) according to Dm 1840 Circular metal slitting saw blade 250 x 3 BXfi DIH 1838 - HSS Table 2 4 4 J14 112 9 50 11 63 MEEkiE:Ogi Circular metal slitting saw blades conforming to the present Standard shall be marked with the diameter dl, the width
8、b, the tooth form, the tool type, the number of teeth z, the material and the manufacturers name or trade mark, e.g.: 160 x 3 BN 64 HSS, manufacturers trade mark References to further stanards DIN 1836 Fields of application of tool types N, H and W DIN 1837 Circular metal slitting saw blades, fine-t
9、oothed DIN 1840 -, tooth forms, side clearance, manufacturing tolerances DIN 5508rC Sheet 1 Circular cold saw8, main dimensions and dimensions of connections Explanations In the present new version of DIN 1838, the second standardized number of teeth for each saw blade size has been omitted. The dem
10、and for the circular saw blade types thus deleted in the present Standard has been decreasing progressively to a point where the standardization of these types no longer seemed justi- fied. The numbere of teeth of some circular saw blade sizes have been shifted one step in accordance with the workin
11、g results carried out by ISO/TC 29 in respect of a future IS0 Recommendation. The ratio of num- bers of teeth of fine-toothed circular saw bladee according to DIN 1837 to coarse-toothed circular 6aw blades according to DIN 1838 ia now 112 for all saw blade sizes. It is anticipated that the future IS
12、0 Recommendation will feature the following coarse-toothed circular sau blades over and above those con- tained in DIN 1838: 50 x 0.3 and 50 X 0.4 63X 0.3 and 63 X 0.4 32 X 0.3 UP to 32 X 3 40 x 0.3 UP to 40 x 4 It ie also anticipated that the future IS0 Reoommendation will not feature the following
13、 circular maw blades: 100 X 0.6 200 x 1.2 I25 X 0.8 250 X 1.6 160 x 1 Apart from the conventional finish dth tooth form B, circular saw blades rlth tooth forms Bw and C according to DIN 1840 have been adopted in the present Standard as special finishea in the case Or Ch- cular saw blades of 2 mm thickness and above. The designation has been extended to include the code lot- ter of the application group.
