1、IDC 621.951.7-034.14.018.252.3 DEUTSCHE NORM October 1981 I I Machine chucking reamers with Morse taper shanks I 208 Maschinen-Reibahlen mit Morsekegelschaft Supersedes March 1975 edition As it is current practice in standards published by the International Organization fr Standardization (ISO), the
2、 comma has been used throughout as a decimal marker. For connection with International Standard IS0 521 - 1975 issued by the International Organization for Standardiza- tion (ISO), see Explanations. 1 Field of application This Standard applies to machine chucking reamers with Morse taper shanks made
3、 of high-speed steel. 2 Dimensions, designation Details left unspecified are to be selected as appropriate. For limiting deviations, see DIN 2172 Part 1. Type A straight-fluted reamer Dimensions in mm Morse taper shank B according to DIN 228 Part 1 I b . 1 P 12 O Type B spiral-fluted reamer Dimensio
4、ns and data as for type A Type c high-spiral reamer Dimensions and data as for type A Designation of a straight-fluted machine chucking reamer with Morse taper shank (A) of diameter d = 20 mm, for reaming to tolerance zone H7 (standard type), made of high-speed steel of alloy group HSS-E: Reamer DIN
5、 208 - A 20 - HSS-E Morse taper Diameter range 1) over I UD to Size O 5 4,75 5.3 133 23 - 6 5,3 6 138 26 1 -6 6,7 144 28 7 6.7 7,5 150 31 8 7,5 8,5 156 33 1 9 8.5 9.5 162 36 d Diameter range 1) over I up to 11 12 13,2 189 Morse taper shank Size 1 1 O Not included in IS0 521 - 1975 1) The diameter ra
6、nges lay down the overall lengths for machine chucking reamers with intermediate diameters. Continued on pages 2 and 3 Sole sale rights of German Standards (DIN-Normen) are with Beuih Verlag GmbH, Berlin 30 05.82 DIN 208 Engl. Price group: Sales No. 0106 COPYRIGHT DIN DEUTSCHES Institut Fur Normung
7、E.V.- EnglishLicensed by Information Handling ServicesPage2 DIN 208 3 Material 4 Finish 5 Marking Table (continued) In accordance with the technical delivery conditions according to DIN 2172 Part 1. 1) See page 1 Standards referred to DIN 228 Part 1 DIN 2172 Part 1 Morse tapers and metric tapers; ta
8、per shanks Reamers; technical conditions of delivery for reamers with shanks Further standards DIN 212 Part 1 DIN 212 Part 2 DIN 219 Shell reamers DIN 8050 DIN 8051 DIN 8093 DIN 8094 Machine chucking reamers with parallel shanks, full shank Machine chucking reamers with parallel shanks, stepped shan
9、k Machine chucking reamers with parallel shanks, with carbide tips, with short cutting portion Machine chucking reamers with Morse taper shanks, with carbide tips, with short cutting portion Machine chucking reamers with parallel shanks, with carbide tips, with long cutting portion Machine chucking
10、reamers with Morse tapers, with carbide tips, with long cutting portion Previous editions DIN 208: 11.22, 04.42, 08.51, 10.59,09.62, 03.75 Amendments Compared with the March 1975 edition, the following amendments have been made: a) High-spiral reamer -type C - included b) Sequence of elements in the
11、 designation modified according to DIN 820 Part 27 c) Symbol for the material according to DIN 2172 Part 1 included in the designation d) Standard completely revised editorially COPYRIGHT DIN DEUTSCHES Institut Fur Normung E.V.- EnglishLicensed by Information Handling ServicesDIN 208 Page 3 Explanat
12、ions The dimensions for machine chucking reamers with Morse taper shanks contained in this Standard agree with Standard E: Machine chucking reamers with parallel shanks or Morse taper shanks F: Alsoirs machine cylindrique et queue cne Morse Section 6, issued by the International Organization for Sta
13、ndardization (ISO). In deviation from this, only diameter ranged over 4,75 up to 5,3 mm has been additionally included and diameter ranges 22,4 up to 23,02 and 23,02 up to 23,6 or 31,5 up to 31,75 and 31,75 up to 33.5 mrn, respectively, have been combined in one range each. IS0 521 - 1975 “I *) IC0 Standards in English and French version are obtainable from: Beuth Verlag GmbH, Burggrafenstrasse 4-10, D-1000 Berlin 30 COPYRIGHT DIN DEUTSCHES Institut Fur Normung E.V.- EnglishLicensed by Information Handling Services
