1、DEUTSCHE NORM November 1997 DIN IS0 6411 - Technical drawings Simplified representation of centre holes (IS0 641 1 : 1982) ICs 01.1 00.20 Descriptors: Drawings, representation, centre holes. Supersedes DIN 332-1 O, December 1983 edition. Technische Zeichnungen - Vereinfachte Darstellung von Zentrier
2、- bohrungen (IS0 641 1 : 1982) This standard incorporates International Standard IS0 641 1 Technical drawings - Simplified representation of centre holes. A comma is used as the decimal marker. National foreword This standard has been prepared by ISO/TC 1 O. The responsible German body involved in i
3、ts preparation was the Normenausschu Technische Produkf- dokumenfafion (Technical Product Documentation Standards Committee). The DIN Standards corresponding to the International Standards referred to in clause 2 of the IS0 Standard are as follows: IS0 Standard DIN Standards IS0 128 IS0 2540 IS0 254
4、1 IS0 6428 DIN IS0 6428 DIN 6-1, DIN 6-2, DIN 15-1, DIN 15-2, DIN 201 and DIN IS0 10209-2 DIN 332-1 and DIN 333 DIN 332-1 and DIN 333 IS0 866 DIN 332-1 IS0 3098-1 DIN 6776-1 Amendments DIN 332-1 O, December 1983 edition, has been superseded by the specifications of DIN IS0 641 1 Previous edition DIN
5、 332-1 O: 1983-1 2. National Annex NA Standards referred to (and not included in References) DIN 6-1 Technical drawings - Representation in normal projection - Views and special representa- tions DIN 6-2 Technical drawings - Representation in normal projection - Sectional views DIN 15-1 Technical dr
6、awings - Lines - Basic principles DIN 15-2 Technical drawings - Lines - General application DIN 201 Technical drawings - Hatching to indicate sections DIN 332-1 Types R, A, 6, and C 60“ centre holes DIN 333 Types R, A und B 60“ centre drills DIN 6776-1 Technical drawings - Lettering - Characters DIN
7、 IS0 6428 Technical drawings - Requirements for microcopying IS0 Standard comprises 6 pages. I Q No pari of this standard may be reproduced without the prior permission of Ref. No. DIN IS0 641 1 : 1997- DIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, D-10772 Berlin, has the exclu
8、sive right of sale for German Standards (DIN-Normen). English price group 08 Sales No. 1108 04.99 Page 1 IS0 641 1 : 1982 Technical drawings Simplified representation of centre holes Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards ins
9、titutes (IS0 member bodies). The work of developing Inter- national Standards is carried out through IS0 technical committees. Every member body interested in a subject for which a technical committee has been set up has the right to be represented on that committee. International organizations, gov
10、ernmental and non-governmental, in liaison with ISO, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the mernher hodies for approval before their acceptance as International Standards hy the IS0 Council. International Standard IS0 6411
11、was developed hy Technical Committee ISO/TC 10, Technical drawings, and was circulated to the member bodies in January 1980. It has been approved by the member bodies of the following countries : Australia Austria Belgium Brazil Canada China Czechoslovakia Denmark Finland France Germany, F. R. India
12、 Italy Japan Korea, Dem. P. Rep. of Korea, Rep. of Mexico Norway Poland Romania South Africa, Rep. of Spain Sweden Switzerland United Kingdom USA USSR The member body of the following country expressed disapproval of the document on technical grounds : Netherlands Page 2 IS0 641 1 : 1982 1 Scope and
13、 field of application This International Standard specifies the simplified represen- tation of centre holes and their designation. Simplified representation of centre holes may be used particularly when it is not necessary to show the exact form and size and where the designation of standardized cen
14、tre holes is sufficient for infor- mation. IS0 3098l1, Technical drawings - lettering - Part I : Currently used characters. IS0 6428, Technical drawings - Requirements for micro- copying. 1 ? 3 Indication on drawings 2 References I SO 128, Technical drawings - General principles of presen- tation. I
15、S0 866, Centre drills for centre holes without protecting chamfers - Type A. IS0 2540, Centre drills for centre holes with protecting chamfers - Type B. IS0 2541, Centre drills for centre holes with radius form - Type R. 3.1 Requirements Generally, three different requirements may be defined on tech
16、nical drawings for the form and size of centre holes, namely : a) centre hole is required on the finished part; b) centre hole can be accepted on the finished part, but is not a fundamental requirement; c) centre hole shall not exist on the finished part 1) At present at the stage of draft. Page 3 I
17、S0 641 1 : 1982 3.2 Simplified representation The symbols representing centre holes and their application to the end face of a shaft are shown in column 2 of table 1. 3.3 Designation of centre holes The designation of centre holes is dependent on the drill and may be indicated with reference either
18、to an International Stan- dard or to any other standard dealing with this subject. The designation of the centre hole itself consists of - a reference to this International Standard: the letter for the type (R, A or 6); - - the pilot diameter d; - the outside countersink centre hole diameter D. The
19、two values are separated by a solidus. Example : a centre hotel), type B with d = 2,5 mm and D3 = 8 mm may be indicated on the drawing as : IS0 6411-8 2,5/8 4 Interpretation of indication The relationship between the various designations used to specify the centre holes, the dimensions represented b
20、y the given designations, and dimensions depending on the centre drill used are shown in table 2. Further details specifying the dimensions of the centre hole, to be indicated preferably on the drawings, are given in annex A. Table 1 - Representation and designation of centre holes on drawings Dimen
21、sions in millimetres Requirement Centre hole is required on the finished part Centre hole may remain on the finished part Centre hole shall not exist on the finished Dart Representation Designation IS0 6411 - 6 2,5/8 k IS0 6411 - 6 2,5/8 L f- YS0 6411 - 8 2,5/8 1) For the machining of such a centre
22、hole, a drill with d = 2,5 and dl = 10 according to IS0 2540 is used. Page 4 IS0 641 1 : 1982 L For dimension 1, see annex Table 2 - Interpretation of the designation A. Dimensions in rnillirnetres Type of centre hole R with radius form (centre drill according to IS0 866) B with protecting chamfer (
23、centre drill according to IS0 25401 Designation exarnplesl i-kiS 6411 - R 3,WC -+S 6411 - A 4/8,5 t-pS 6411 - B 2,5/8 Interpretation of the designation d =3,l5 DI= 6,7 II I Y * Dimension I depends on the length of the centre drill. It should not he less than t. Page 5 IS0 641 1 : 1982 Annex A Dimens
24、ions for centre holes type R, A and B The dimensions which are necessary to specify a centre hole are shown in table 3 Table 3 - Dimensions of preferred centre holes Dimensions in millimetres d nom. R according to IS0 2541 D1 nom. 2.12 2,65 3.35 4.25 5.3 6.7 8.5 10.6 13,2 17.0 21,2 4 nom. A accordin
25、g to IS0 866 1 .o6 1.32 1,70 2.12 2.65 335 4.25 5.30 6.70 8,50 10.60 13,20 17,OO 21,20 i ref, B according to IS0 2540 Q3 f nom. 1 ref. 3.15 4 5 6.3 8 10 12.5 16 18 22.4 28 NOTE - Sizes in brackets should be avoided whenever possible. Page 6 IS0 641 1 : 1982 Line thickness for outlines of an item (6)
26、 Height of numerals and capital letters h) Line thickness for symbols d Line thickness for lettering id) Height Hl -_ Annex 6 Proportions and dimensions of symbols Oz5 Or7 *,8 3f5 l4 2o 0,35 0,5 0.7 1 1.4 2 see B. 1.2 5 7 10 14 20 28 In order to harmonize the sizes of the symbols specified in this I
27、nternational Standard with those of the other inscriptions on the drawing (dimensions, tolerances, etc. the following rules shall he observed. B.l General requirements B. 1 .I The symbols shown in the tahle shall he inscribed with a line thickness d ) equal to 1 /10 of the height (h) of the letter-
28、ing used for the dimensions in the relevant drawing. B.1.2 The numerals and capital letters used for the additional specifications of centre holes shall he inccrihed with the same line thickress (d), height (h) and type of lettering as used for the dimensions in the relevant drawing, and in accordan
29、ce with IS0 3098/1. B.1.3 in accordance with IS0 128 or IS0 6428. The minimum spacing hetween adjacent lines shall he It is recommended that this spacing he not less than 0.7 mm. B.2 Proportions The symbol and its complements shown in area a (see 8.3) shall he drawn in accordance with the figure. B.3 Dimensions The range of sizes to he used for the symbols and additional indications is given in tahle 4. Figure
