1、UDC 621.91 4.2 DEUTSCHE NORMEN September 1978 Semi-circular Profile Milling Cutters Concave Dimensions - DIN 855 Part 1 Halbrund-Profilfrser, konkav; Masse For connection with the International Standard IS0 3860 - 1977published by the International Organization for Standardization (ISO), see Explana
2、tions. Dimensions in mm 1 Other relevant Standards DIN 138 Metal cutting tools; bores, keyways and driving features for tools with cylindrical bore and with taper bore with 1 : 30 taper DIN 855 Part 2 (at present still in draft form) Semi-circular profile milling cutters;concave; technical condition
3、s of delivery DIN 2084 Part 1 (subsequent edition at present still in draft form) rings for milling cutter studs 2 Dimensions, Designation Details left unspecified are to be selected as appropriate. Type A Type B coupled “i Intermediate ring according to DIN 2084 Part 1 “) Bore and longitudinal keyw
4、ay according to DIN 138 Dimensions as for Type A Designation of a semi-circular profile milling cutter of shape A, of radius r = 6 mm, of high speed tool steel of alloy group HSS: Milling cutter DIN 855 -A 6 - HSS “1 Subsequent edition at present still in draft form O These sizes are not featured in
5、 IS0 3860 - 1977. 1) The diameters d, correspond to those of the spacer collars for milling machine arbors, Type E, in accordance with DIN 2084 Part 1 (subsequent edition at present still in draft form) Continued on page 2 Explanations on page 2 lemle rights of German Standards (DIN-Normen) are with
6、 Beuth Veilag GrnbH. Beriln 30 DIN 855 Teil 1 engl. Preisgr. Vertr.-Nr. O104 03.81 Page 2 DIN 855 Part 1 4 Execution 3 Material 5 Marking According to the technical conditions of delivery DIN 855 Part 2 (at present still in draft form) I Further Standards DIN 856 Part 1 Semi-circular profile milling
7、 cutters, convex; dimensions DIN 6513 Part 1 Single corner rounding cutters, concave; dimensions Explanations The dimensions featured in this Standard for concave semi-circular profile milling cutters conforms completely to those featured in the Standard IS0 3860 - 1977 *I, Section 3.2, published by
8、 the International Organization for Standardization (ISO) in English, French and German: E: Bore cutters with key drive - Form milling cutters with constant profile F: Fraises alsage lisse entranement par clavette - Fraisesde forme profil constant The semi-circular milling cutters with r = 0.5 and 0
9、.8 mm featured in DIN 855 Part 1 are not included in the above-mentioned IS0 Standard. As against DIN 855, February 1960 edition, this Standard has been split into Part 1, featuring the dimensions, and Part 2 featuring the technical conditions of delivery. Type B has been adopted in this Standard fo
10、r the first time, and the total number of types has been reduced from 25 to 19 milling cutters. The diameters dl have been altered and harmonized with ISO, and their gradation now corresponds to the R 10 series of preferred numbers. In the case of the bore diameters dS, a shift has taken place in th
11、e coordination with the associated outer diameters. Furthermore, the Standard has been editorially revised, the designations being adapted in conformity with DIN 820 Part 27, December 1976 edition. Simultaneously with the publication of this Standard, DIN 855 Part 2 - Semi-circular profiled milling cutters, concave; technical conditions of delivery - is being published in draft form. *) IS0 Standards in English and French are obtainable from: Beuth Verlag GmbH, Burggrafenstrae 4-10, 1000 Berlin 30
