1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58ICS 25.060.20Milling machine arbors with 7/24 tapers Part 1: Dimensions and designation BRITISH STA
2、NDARDBS ISO 839-1:2006BS ISO 839-1:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 28 February 2007 BSI 2007ISBN 978 0 580 50285 9Amendments issued since publicationAmd. No. Date Commentscontract. Users are responsible for its correct app
3、lication.Compliance with a British Standard cannot confer immunity from legal obligations.National forewordThis British Standard was published by BSI. It is the UK implementation of ISO 839-1:2006. It supersedes BS 5517:1977 which is withdrawn. The UK participation in its preparation was entrusted t
4、o Technical Committee MTE/5, Engineers rotary cutting tools of high speed steel.A list of organizations represented on MTE/5 can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a Reference numberISO 839-1:2006(E)INTERNATIONAL STAND
5、ARD ISO839-1Second edition2006-12-01Milling machine arbors with 7/24 tapers Part 1: Dimensions and designation Arbres porte-fraises au cne 7/24 Partie 1: Dimensions et dsignation BS ISO 839-1:2006ii iiiForeword ISO (the International Organization for Standardization) is a worldwide federation of nat
6、ional standards bodies (ISO member bodies). The work of 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. Interna
7、tional 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 of electrotechnical standardization. International Standards are drafted in accordance with the r
8、ules given in the ISO/IEC Directives, Part 2. The main task of technical 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 a
9、t least 75 % of the member bodies casting a vote. Attention is drawn 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 839-1 was prepared by Technical Committee ISO/T
10、C 29, Small tools, Subcommittee SC 2, High speed steel cutting tools and their attachments. This second edition cancels and replaces the first edition (ISO 839-1:1976), which has been technically revised. ISO 839 consists of the following parts, under the general title Milling machine arbors with 7/
11、24 tapers: Part 1: Dimensions and designation Part 2: Accessories BS ISO 839-1:2006blank1Milling machine arbors with 7/24 tapers Part 1: Dimensions and designation 1 Scope This part of ISO 839 specifies the dimensions of milling machine arbors with 7/24 tapers in accordance with ISO 297. It also spe
12、cifies the designation of these arbors. NOTE The accessories of these arbors (spacing collars, bearing collars and clamping nuts) are specified in ISO 839-2. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only t
13、he edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 297:1988, 7/24 tapers for tool shanks for manual changing ISO 2768-1:1989, General tolerances Part 1: Tolerances for linear and angular dimensions without individua
14、l tolerance indications 3 Choice of dimensions and tolerances The diameters, which have been adopted in this part of ISO 839 as the most commonly used, correspond to the values given in ISO 240 from 16 mm to 100 mm (omitting 19 mm and 70 mm). The shoulder, whether cylindrical or tapered, between the
15、 flange of diameter d1and the cylindrical portion of diameter d, is optional. With or without the shoulder, however, the diameter of the flange locating face shall not in any case be less than d2. 4 Dimensions 4.1 General All dimensions and tolerances are given in millimetres. Tolerances not specifi
16、ed shall be of tolerance class m, in accordance with ISO 2768-1:1989. 4.2 Principal dimensions The principal dimensions of milling machine arbors with 7/24 tapers are shown in Figure 1 and given in Table 1. BS ISO 839-1:20062 Key 1 7/24 taper in accordance with ISO 297 2 cutter radius 3 cylindrical
17、or taper Figure 1 Principal dimensions of milling machine arbors with 7/24 tapers BS ISO 839-1:2006Table 1 Principal dimensions of milling machinearbors with 7/24 tapers Useful length l17/24 taper No. b N11d1d2d3d4e63 100 160 200 250 315 400 500 630 800 1 000l2l34 16 27 M16 1,5 18 6 22 34 M20 1,5 24
18、 30 7 27 50 41 M24 1,5 8 32 30 4 16 27 M16 1,5 18 6 22 34 M20 1,5 24 7 27 41 M24 1,5 30 8 32 47 M30 1,5 34 40 10 40 63 55 M36 2 10 36 42 6 22 34 M20 1,5 24 7 27 41 M24 1,5 30 8 32 47 M30 1,5 34 10 40 55 M36 2 42 12 50 69 M42 2 48 50 14 60 100 84 M52 2 12 45 58 12 50 69 M42 2 48 14 60 84 M52 2 58 18
19、80 109 M68 3 72 60 24 100 160 134 M80 4 16 56 82 yaccording to length 0,015 0,0200,0300,0350,04 3BS ISO 839-1:20064 4.3 Pilot at end of arbor The dimensions of the pilot at the end of the arbor are shown in Figure 2 and given in Table 2. Figure 2 Dimensions of pilot at end of arbor Table 2 Dimension
20、s of pilot at end of arbor d1d4d5g6 l416 M 16 1,5 13 20 22 M 20 1,5 16 25 27 M 24 1,5 20 32 M 30 1,5 23 40 M 36 2 29 32 50 M 42 2 34 60 M 52 2 40 56 BS ISO 839-1:200654.4 Protective boss at end of arbor The dimensions of the protective boss at the end of the arbor are shown in Figure 3 and given in
21、Table 3. Figure 3 Dimensions of protective boss at end of arbor Table 3 Dimensions of protective boss at end of arbor d1d4d5l5 min.16 M 16 1,5 13 22 M 20 1,5 16 27 M 24 1,5 20 32 M 30 1,5 23 40 M 36 2 29 2 50 M 42 2 34 60 M 52 2 40 3 80 M 68 3 49 100 M 80 4 61 5 5 Material The material is at the opt
22、ion of the manufacturer; however, the tensile strength shall be at least 800 N/mm2. Hardness shall be 56 +4HRC. 6 Designation A milling machine arbor with 7/24 taper in accordance with this part of ISO 839 shall be designated by: a) “Arbor”; b) reference to this part of ISO 839, i.e. “ISO 839-1”; c)
23、 dash; d) 7/24 taper number/dimension of d1; e) information as to whether the end of arbor is protected or piloted, or nothing. EXAMPLE Designation of a milling machine arbor with 7/24 taper in accordance with ISO 839-1, 7/24 taper No. 40, d1= 8 mm and with protected end of arbor: Arbor ISO 839-1 -
24、40/8 protected BS ISO 839-1:20066 Bibliography 1 ISO 240:1994, Milling cutters Interchangeability dimensions for cutter arbors or cutter mandrels BS ISO 839-1:2006blankBS ISO BSI389 Chiswick High RoadLondonW4 4AL839-1:2006BSI British Standards InstitutionBSI is the independent national body responsi
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