1、BRITISH STANDARD BS ISO 7388-2:2007 Tool shanks with 7/24 taper for automatic tool changers Part 2: Dimensions and designation of shanks of forms J, JD and JF ICS 25.060.20 BS ISO 7388-2:2007 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 28
2、 September 2007 BSI 2007 ISBN 978 0 580 56723 0 National foreword This British Standard is the UK implementation of ISO 7388-2:2007. It supersedes BS 6607-2:1985 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee MTE/1, Machine tools. A list of organizat
3、ions represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations
4、. Amendments issued since publication Amd. No. Date Comments Reference number ISO 7388-2:2007(E)INTERNATIONAL STANDARD ISO 7388-2 Second edition 2007-08-01 Tool shanks with 7/24 taper for automatic tool changers Part 2: Dimensions and designation of shanks of forms J, JD and JF Queues doutils conici
5、t 7/24 pour changement automatique doutils Partie 2: Dimensions et dsignation des queues de formes J, JD et JF BS ISO 7388-2:2007ii iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing
6、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 liaiso
7、n with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of tec
8、hnical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is dra
9、wn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 7388-2 was prepared by Technical Committee ISO/TC 29, Small tools. This second edition cancels and replaces the f
10、irst edition (ISO 7388-2:1984), which has been technically revised. ISO 7388 consists of the following parts, under the general title Tool shanks with 7/24 taper for automatic tool changers: Part 1: Dimensions and designation of shanks of forms A, AD, AF, U, UD and UF Part 2: Dimensions and designat
11、ion of shanks of forms J, JD and JF Part 3: Retention knobs for shanks of forms AC, AD, AF, UC, UD, UF, JD and JF BS ISO 7388-2:2007iv Introduction The aim of ISO 7388 is to integrate existing standards which are most commonly used as an industrial standard. In addition, the different developments f
12、or cooling and data chip have been taken into account. BS ISO 7388-2:20071 Tool shanks with 7/24 taper for automatic tool changers Part 2: Dimensions and designation of shanks of forms J, JD and JF 1 Scope This part of ISO 7388 specifies the dimensions of tool shanks with a 7/24 taper of shank form
13、J (with two possible additions for each) for automatic tool changers used on machines having an automatic gripping system for feeding tools from the magazine to the spindle and vice-versa. These tools are designed with the most important dimensions for use in spindle noses according to ISO 9270. 2 N
14、ormative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 2768-1, General tolerance
15、s Part 1: Tolerances for linear and angular dimensions without individual tolerance indications ISO 2768-2, General tolerances Part 2: Geometrical tolerances for features without individual tolerance indications ISO 8015, Technical drawings Fundamental tolerancing principle 3 Dimensions 3.1 General
16、All dimensions and tolerances are given in millimetres; tolerancing is according to ISO 8015. Tolerances not specified shall be of tolerance class “m” in accordance with ISO 2768-1 and of class “k” in accordance with ISO 2768-2. 3.2 Shank form J See Figure 1 and Table 1. BS ISO 7388-2:20072 Key 1 cu
17、tting edge 2 transition between taper and flange aPosition of the cutting edge for right hand tools with single cutting edge (can be rotated 180: symmetrical design). bAt the option of the manufacturer (radius or chamfer). cAt the manufacturers discretion. dScale: 2:1. eNot convex. Figure 1 Shank fo
18、rm J BS ISO 7388-2:20073 Table 1 Dimensions of shanks of form J Shank number Dimension 30 40 45 50 60 b 0,2 0 +16,1 19,3 25,7 d 1a31, 75 44,45 57,15 69,85 107,95 d 2H8 12,5 17 21 25 31 d 4 0 0,5 38 53 73 85 135 d 5h8 46 63 85 100 155 d 6 0,0556,03 75,56 100,09 118,89 180,22 d 76H M12 M16 M20 M24 M30
19、 d 88 10 12 15 20 d 11max. 14,5 19 23,5 28 36 f b20 25 30 35 45 l 1 0,2 48,4 65,4 82,8 101,8 161,8 l 2min. 24 30 36 45 56 l 3min. 34 43 50 62 76 l 4 0,5 0 +7 9 11 13 16 l 5min. 17 21 26 31 34 l 616,3 22,6 29,1 35,4 60,1 l 6tol. 0 0,3 0 0,4 l 7 0 0,5 1,6 2 r 10,5 1 r 2c 0 0,5 0,8 1 1,2 1,5 2 t 10,001
20、 0,002 0,003 t 20,002 0,003 0,004 t 30,12 0,2 u min. 22 27 33 38 48 v 0,1 13,6 16,6 21,2 23,2 28,2 x 4 5 6 7 11 y 0,4 d2 3 81750“ tol. 4“ 0 +ad 1 : basic diameter enclosed in a gauge plane. bFor information only. cChamfer or radius type of counterbore entrance are possible and limited by diameter d
21、11 . dTolerance 0,1 for form JF. BS ISO 7388-2:20074 3.3 Shank form JD As a complement to Form J, it is possible to add a through hole, e.g. for centric inner cooling lubricant supply, as indicated in Figure 2. This form is called JD. The condition is that d 10shall be less than or equal to the core
22、 diameter of the thread receiving the retention knob. Figure 2 Shank form JD 3.4 Shank form JF As a complement to Form J, it is possible to add two holes at the back of the flange for inner coolant supply, the dimensions of which are indicated in Figure 3 and Table 2. This form is called JF. If an a
23、uxiliary connecting bore is needed, it shall be sealed to withstand an operating pressure of up to 5 MPa, of a design that is at the manufacturers discretion. aDifferent from forms J and JD. Figure 3 Shank form JF BS ISO 7388-2:20075 Table 2 Supplementary dimensions of shank form JF Shank no. d 9max
24、. e 130 2 20 40 4 27 45 5 35 50 6 42 60 8 66 3.5 Shanks with data medium For the three shank forms defined in 3.2 to 3.4, it is possible to add a data medium, the dimensions of which are indicated in Figure 4 and Table 3. aThe fitting position of the data medium is the same position of the cutting e
25、dge as for right-hand tools with a single cutting edge. bOther diameter and depth according to the data medium used. Figure 4 Fitting position of the data medium Table 3 Supplementary dimensions for fitting data medium Shank no. Dimension 30 40 45 50 60 c amax. 0,3 45 or r 0,3 ad 1310 0,09 0 +l 84,6
26、 0,2 0 +l 911 14,5 18 20,5 aAt the discretion of the manufacturer. BS ISO 7388-2:20076 4 Information on material and heat treatment Tool shanks with a 7/24 taper should be heat treated with considerations for strength, hardness, case depth (if not through hardened). Toughness and wear requirements a
27、re to be taken into account. 5 Designation A tool shank with 7/24 taper in accordance with this part of ISO 7388 shall be designated as follows: a) “Tool shank”; b) reference to this part of ISO 7388, i.e. “ISO 7388-2”; c) a dash; d) Form J, JD or JF; e) the size; f) in the case of a design with dat
28、a medium, a dash and the letter D. EXAMPLE Designation of a tool shank with 7/24 in accordance with ISO 7388-2, Form J, shank no. 40, with fitting position for a data medium D: Tool shank ISO 7388-2 J 40 D BS ISO 7388-2:20077 Bibliography 1 ISO 9270 1) , 7/24 tapers for tool shanks for automatic cha
29、nging Tapers for spindle noses 1) It is intended that at the next revision, shanks of forms U, UD, UF, J, JD and LF will also be covered. BS ISO 7388-2:2007BS ISO 7388-2:2007 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible f
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