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© ISO 2017 Cylindrical shank twist drills — Long series Forets à queue cylindrique — Série longue INTERNATIONAL STANDARD ISO 494 Third edition 2017 02 Reference number ISO 494 2017(E) ISO 494 2017(E)[.]
INTERNATIONAL STANDARD ISO 494 Third edition 2017-02 Cylindrical shank twist drills — Long series Forets queue cylindrique — Série longue Reference number ISO 494:2017(E) © ISO 2017 ISO 494:2017(E) COPYRIGHT PROTECTED DOCUMENT © ISO 2017, Published in Switzerland All rights reserved Unless otherwise specified, no part o f 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 written permission Permission can be requested from either ISO at the address below or ISO’s member body in the country o f the requester ISO copyright o ffice Ch de Blandonnet • CP 401 CH-1214 Vernier, Geneva, Switzerland Tel +41 22 749 01 11 Fax +41 22 749 09 47 copyright@iso.org www.iso.org ii © ISO 2017 – All rights reserved ISO 494:2017(E) Contents Page Foreword iv Scope Normative references Terms and definitions Dimensions Cutting length 4.1 4.2 4.3 General General dimensions Lengths set out as functions of diameter steps Shank Annex A (informative) Relationship between designations in this document and the ISO 13399 series Bibliography © ISO 2017 – All rights reserved iii ISO 494:2017(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies) The work o f preparing International Standards is normally carried out through ISO technical committees 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 International Electrotechnical Commission (IEC) on all matters o f electrotechnical standardization The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part In particular the different approval criteria needed for the di fferent types o f ISO documents should be noted This document was dra fted in accordance with the editorial rules of the ISO/IEC Directives, Part (see www.iso org/directives) Attention is drawn to the possibility that some o f the elements o f this document may be the subject o f patent rights ISO shall not be held responsible for identi fying any or all such patent rights Details o f any patent rights identified during the development o f 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 is in formation given for the convenience o f users and does not constitute an endorsement For an explanation on the voluntary nature o f standards, the meaning o f ISO specific terms and expressions related to formity assessment, as well as in formation about ISO’s adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www.iso org/iso/foreword html This document was prepared by Technical Committee ISO/TC 29, Small tools, Subcommittee SC 9, Tools with defined cutting edges, cutting items This third edition cancels and replaces the second edition (ISO 494:2009), of which it constitutes a minor revision with the following change: — added Annex A, giving the relationship between the symbols of this document and the symbols according to the ISO 13399 series iv © ISO 2017 – All rights reserved INTERNATIONAL STANDARD ISO 494:2017(E) Cylindrical shank twist drills — Long series Scope T h i s c u ment s p e c i fie s the d i men s ion s o f c yl i nd ric a l s han k twi s t d ri l l s h avi ng worki ng leng th s i n the long series T he c yl i nd ric a l sh an k j obb er a nd s tub s erie s d ri l l s and M ors e tap er sh an k d ri l l s are given i n I S O Normative references There are no normative references in this document Terms and definitions No term s and defi nition s a re l i s te d i n th i s c u ment ISO and IEC maintain terminological databases for use in standardization at the following addresses: — IEC Electropedia: available at http://www.electropedia org/ — ISO Online browsing platform: available at http://www.iso org/obp Dimensions 4.1 General All dimensions and tolerances are given in millimetres 4.2 General dimensions T he d i men s ion s o f c yl i nd ric a l s n k twi s t d ri l l s s l l b e i n accorda nce with the d i men s ion s shown i n Figure and given in Table Key recess optional Figure — Dimensions of cylindrical shank twist drill © ISO 2017 – All rights reserved ISO 494:2017(E) Table — Dimensions of cylindrical shank twist drill h8 d 1,00 1,10 1,20 1,30 1,40 l 33 37 41 45 1,50 l 56 ,10 60 6,20 6,30 65 6,40 70 1,60 1,70 1,80 1,90 2,00 2,10 2,20 2,30 2,40 ,50 3,50 ,60 3,70 3,80 3,90 4,00 4,10 4,20 4,30 4,40 4, 5,20 5,30 148 6,50 53 56 59 80 6,60 85 90 ,9 7,00 7,10 7,20 7,30 7,40 102 156 95 66 69 100 10 109 165 78 82 112 119 87 175 14 , 14 , 132 128 ,7 254 171 61 21,50 ,7 22,00 76 268 22 ,25 22 ,50 2 ,75 134 205 23,00 180 75 23,25 23,50 ,7 24,00 4, 185 4, 282 4,7 25 ,00 25,25 25,50 140 214 ,75 26,00 190 290 26,25 26,50 ,7 27,00 144 227 7, 19 7, 298 7, 28,00 149 220 28,25 28,50 ,7 29,00 16, 201 307 9, 154 235 ,75 9, 17,00 9,7 30,00 7, 7, 158 7, 16 21,25 16, 184 l 21,00 16 ,0 121 20,50 ,7 15,25 15,50 l 20,25 19 15 ,00 9, 9,70 9,80 9,90 10,00 10,10 10,20 10,30 10,40 20,00 14 , 11 h8 d 19 , 12,70 12,80 12,90 13,00 13,10 13,20 13,30 13,40 13,70 13,80 13,90 14,00 9, 126 l 11,70 11,80 11,90 12,00 12,10 12,20 12,30 12,40 13 ,60 8,60 8,70 8,80 8,90 9,00 9,10 9,20 9,30 9,40 l 13,50 8,50 73 11 , ,60 7, 7,70 7,80 7,90 8,00 8,10 8,20 8,30 8,40 11,20 11,30 11,40 12 ,50 7, 62 h8 d 11 ,60 6,80 4,70 4,80 4,90 ,10 97 l 76 4, ,00 l , 70 50 ,60 2,70 2,80 2,90 3,00 3,10 3,20 3,30 3,40 h8 d 241 30, 25 30, 50 © ISO 2017 – All rights reserved ISO 494:2017(E) Table (continued) d1 h8 5,40 5,50 5,60 5,70 5,80 5,90 l1 91 l2 139 6,00 d1 h8 l1 10,50 10,60 10,70 10,80 10,90 11,00 11,10 128 l2 195 d1 h8 18,00 18,25 18,50 18,75 l1 l2 19,50 30,75 31,00 162 247 166 254 19,00 19,25 d1 h8 l1 207 l2 316 31,25 31,50 4.3 Lengths set out as functions of diameter steps The lengths set out as functions of diameter steps shall be as given in Table Table — Lengths set out as functions of diameter steps Diameter ranges d1 Over Up to and including 0,95 1,06 1,18 1,32 1,50 1,70 1,90 2,12 2,36 2,65 3,00 3,35 3,75 4,25 4,75 5,30 6,00 6,70 7,50 8,50 9,50 10,60 11,80 13,20 14,00 1,06 1,18 1,32 1,50 1,70 1,90 2,12 2,36 2,65 3,00 3,35 3,75 4,25 4,75 5,30 6,00 6,70 7,50 8,50 9,50 10,60 11,80 13,20 14,00 15,00 NOTE For tolerance on lengths, lengths Corresponding lengths l1 33 37 41 45 50 53 56 59 62 66 69 73 78 82 87 91 97 102 109 115 121 128 134 140 144 l2 56 60 65 70 76 80 85 90 95 100 106 112 119 126 132 139 148 156 165 175 184 195 205 214 220 l1 and l2 may vary, within one diameter step, between the minimum and maximum limits corresponding respectively to the figures given for the nearest lower or upper step EXAMPLE For diameter d1 = mm, length l1 may vary between 73 mm and 82 mm from the nominal value 78 mm and length l2 may vary between 112 mm and 126 mm from the nominal value 119 mm © ISO 2017 – All rights reserved ISO 494:2017(E) Table (continued) Diameter ranges d1 Over Up to and including 15,00 16,00 17,00 18,00 19,00 20,00 21,20 22,40 23,60 25,00 26,50 28,00 30,00 16,00 17,00 18,00 19,00 20,00 21,20 22,40 23,60 25,00 26,50 28,00 30,00 31,50 NOTE For tolerance on lengths, lengths Corresponding lengths l1 l2 149 227 154 158 162 166 235 241 247 254 261 268 275 171 176 180 282 290 298 307 185 190 195 201 207 316 l1 and l2 may vary, within one diameter step, between the minimum and maximum limits corresponding respectively to the figures given for the nearest lower or upper step EXAMPLE For diameter d1 = mm, length l1 may vary between 73 mm and 82 mm from the nominal value 78 mm and length l2 may vary between 112 mm and 126 mm from the nominal value 119 mm Cutting length The cutting length shall be at the manu facturer’s discretion Unless otherwise specified, these drills shall be right-hand cutting Shank The cylindrical shank twist drills shall be manu factured without tenon drive © ISO 2017 – All rights reserved ISO 494:2017(E) Annex A (informative) Relationship between designations in this document and the ISO 13399 series For the relation s h ip b e twe en the de s ignation s i n th i s c ument and pre ferre d s ymb ol s accord i ng to the ISO 13399 series, see Table A.1 Table A.1 — Relationship between designations in this document and the ISO 13399 series Symbol in ISO 494 (this document) d l l Reference in ISO 494 (this document) Figure Table Figure Table Figure Table Symbol in the ISO 13399 series cutting diameter DC leng th ch ip flute a a Property name in the ISO 13399 series overall length connection diameter machine side LCF OAL D CON M S Reference in the ISO 13399 series 71 D E F 71 D C C C D E F5 71 D 78 E B 7C 71 E B D B F5 E (DC) in Figure D C O N M S h a s the s a me s i z e a s d © ISO 2017 – All rights reserved ISO 494:2017(E) Bibliography [1] ISO 235 , Parallel shank jobber and stub series drills and Morse taper shank drills © ISO 2017 – All rights reserved ISO 494: 01 7(E) ICS 25.100.30 Price based on pages © ISO 2017 – All rights reserved