1、 ISO 2016 Centre drills for centre holes without protecting chamfers Type A Forets centrer pour centres sans chanfrein de protection Type A INTERNATIONAL STANDARD ISO 866 Second edition 2016-08-15 Reference number ISO 866:2016(E) ISO 866:2016(E)ii ISO 2016 All rights reserved COPYRIGHT PROTECTED DOC
2、UMENT ISO 2016, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior writte
3、n permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Ch. de Blandonnet 8 CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 copyrightiso.org www.iso.org ISO 866:201
4、6(E)Foreword iv Introduction v 1 Scope . 1 2 Dimensions . 1 3 Designation 2 Annex A (normative) Dimensions for Type A centre holes and choice of the dimensioning method . 3 Annex B (informative) Relationship between designations in this International Standard and ISO 13399 . 5 Bibliography 6 ISO 201
5、6 All rights reserved iii Contents Page ISO 866:2016(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees
6、. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the Intern
7、ational Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the diff
8、erent types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives). Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO sha
9、ll not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents). Any trade name used in this document
10、is information given for the convenience of users and does not constitute an endorsement. For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TB
11、T), see the following URL: Foreword Supplementary information. The committee responsible for this document is ISO/TC 29, Small tools, Subcommittee SC 2, Holding tools, adaptive items and interfaces. This second edition cancels and replaces the first edition (ISO 866:1975), which constitutes a minor
12、revision with the addition of Annex B, showing the relationship between the symbols in this International Standard and the symbols in the ISO 13399 series.iv ISO 2016 All rights reserved ISO 866:2016(E) Introduction This International Standard, relating to centre drills, covers only centre drills fo
13、r centre holes without a protecting chamfer (Type A). The other types are covered in ISO 2540 (Type B) and ISO 2541 (Type R). ISO 2016 All rights reserved v Centre drills for centre holes without protecting chamfers Type A 1 Scope This International Standard specifies the dimensions of centre drills
14、 for centre holes without protecting chamfers (Type A). It covers only metric dimensions, which are regarded as the only recommended dimensions in the future for this type of drill. The flutes may be straight or spiral, depending on the manufacturers discretion. Unless otherwise indicated, these dri
15、lls will be right-hand cutting. Recommended dimensions for Type A centre holes, which can be obtained by a rational use of the centre drills listed in this International Standard, are given in Annex A. 2 Dimensions Dimensions of the centre drill shall be in accordance with the dimensions shown in Fi
16、gures 1 and 2 and given in Table 1. Figure 1 Single-ended centre drill Type A (d 0,8 mm) Figure 2 Double-ended centre drill Type A (d 1 mm) INTERNATIONAL ST ANDARD ISO 866:2016(E) ISO 2016 All rights reserved 1 ISO 866:2016(E) Table 1 Single- and double-ended centre drill (Type A) dimensions Dimensi
17、ons in millimetres d ak12 d 1h9 L l max. min. max. min. (0,5) (0,63) (0,8) 1,0 (1,25) 3,15 3,15 3,15 3,15 3,15 21 21 21 33,5 33,5 19 19 19 29,5 29,5 1,0 1,2 1,5 1,9 2,2 0,8 0,9 1,1 1,3 1,6 1,6 2,0 2,5 3,15 4,0 4,0 5,0 6,3 8,0 10,0 37, 5 42 47 52 59 33,5 38 43 48 53 2,8 3,3 4,1 4,9 6,2 2,0 2,5 3,1 3,
18、9 5,0 (5,0) 6,3 (8,0) 10,0 12,5 16,0 20,0 25,0 66 74 83 103 60 68 77 97 7, 5 9,2 11,5 14,2 6,3 8,0 10,1 12,8 aSizes in brackets should be avoided whenever possible. 3 Designation A centre drills in accordance with this International Standard shall be designated by the following: a) the term “Centre
19、drill”; b) reference to this International Standard (e.g. ISO 866); c) Type A; d) pilot diameter, d (in millimetres); e) shank diameter, d 1(in millimetres). EXAMPLE A centre drill type A, pilot diameter d = 0,63, shank diameter d 1= 3,15 is designated as follows:Centre drill ISO 866 - A 0,63/3,152
20、ISO 2016 All rights reserved ISO 866:2016(E) Annex A (normative) Dimensions for Type A centre holes and choice of the dimensioning method There are two methods for dimensioning type A centre holes (see Figures A.1 and A.2), which are practically equivalent. One or the other method may be used. Figur
21、e A.1 Method 1 Dimension l depends on the length, l, of the centre drill. It should not, even in the case of drilling with re-sharpened centre drills, be less than the reference value, t, given in Table A.1. Figure A.2 Method 2 Dimension l depends on the length, l, of the centre drill. It should not
22、, even in the case of drilling with re-sharpened centre drills, be less than the reference value, t, given in Table A.1. ISO 2016 All rights reserved 3 ISO 866:2016(E) Table A.1 Dimensioning methods for type A centre holes Dimensions in millimetres d anominal Method 1 Method 2 t Reference value D no
23、minal l 1nominal (0,5) (0,63) (0,8) 1,0 (1,25) 1,06 1,32 1,70 2,12 2,65 0,48 0,60 0,78 0,97 1,21 0,5 0,6 0,7 0,9 1,1 1,6 2,0 2,5 3,15 4,0 3,35 4,25 5,30 6,70 8,50 1,52 1,95 2,42 3,07 3,90 1,4 1,8 2,2 2,8 3,5 (5,0) 6,3 (8,0) 10,0 10,60 13,20 17,00 21,20 4,85 5,98 7,79 9,70 4,4 5,5 7,0 8,7 aSizes in b
24、rackets should be avoided whenever possible.4 ISO 2016 All rights reserved ISO 866:2016(E) Annex B (informative) Relationship between designations in this International Standard and ISO 13399 For the relationship between the designations in this International Standard and preferred symbols in ISO 13
25、399, see Table B.1. Table B.1 Relationship between designations in this International Standard and ISO 13399 ISO 866 ISO 13399 series Symbol Reference Property name Symbol Reference d Figure 1, Figure 2, Table 1 cutting diameter DC ISO/TS 13399-3 BSU 71D084653E57F d 1 Table 1 connection diameter mac
26、hine side DCONMS ISO/TS 13399-3 BSU 71EBDBF5060E6 l Figure 1, Figure 2, Table 1 step diameter length and point length SDL + PL ISO/TS 13399-3 BSU 71DCCC3DFA23A (SDL) BSU 71DCCFD064042 (PL) L Figure 1, Figure 2, Table 1 overall length OAL ISO/TS 13399-3 BSU 71D078EB7C086 120 Figure 1, Figure 2, Table
27、 1 point angle SIG ISO/TS 13399-3 BSU 71DCCC4FEF366 60 Figure 1, Figure 2, Table 1 step included angle STA ISO/TS 13399-3 BSU 71DF151D6E547 ISO 2016 All rights reserved 5 ISO 866:2016(E) Bibliography 1 ISO 2540, Centre drills for centre holes with protecting chamfer Type B 2 ISO 2541, Centre drills for centre holes with radius form Type R 3 ISO 13399 (all parts), Cutting tool data representation and exchange6 ISO 2016 All rights reserved ISO 866:2016(E) ISO 2016 All rights reserved IC S 25.100.30 Price based on 6 pages
