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1、INTERNATIONAL STANDARD 4247 INTERNATIONAL ORGANIZATION FOR STANOAROlZATlON .MEXaYHAPWHAII OPI-AHIlJAUIlR IT0 CTAHAF-TH3AUWi.ORGANISATION INTERNATIONALE DE NORMALISATION Jig bushes and accessories for drilling purposes - Dimensions Guides de perCage et accessoires - Dimensions First edition - 1977-12
2、-15 w UDC 621.951 : Ref. No. IS0 4247-1977 (E) 0, ; G Descriptors : tools, drilling jigs, dimensions, equipment specifications. 2 0, Price based on 9 pages Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Defense Supply Ctr/9960866100 Not for R
3、esale, 04/24/2007 10:59:10 MDTNo reproduction or networking permitted without license from IHS -,-,- FOREWORD IS0 (the International Organization for Standardization) is a worldwide federation of national standards institutes (IS0 member bodies). The work of developing International Standards is car
4、ried 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, governmental and non-governmental, in liaison with ISO, also take part in the work. Dra
5、ft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the IS0 Council. International Standard IS0 4247 was developed by Technical Committee lSO/TC 29, Small tools, and wascirculated to the
6、 member bodies in September 1976. It has been approved by the member bodies of the following countries : Australia Ireland Austria Italy Belgium Japan Brazil Korea, Rep. of Czechoslovakia Mexico France Netherlands Germany Poland Hungary Romania India South Africa, Rep. of Spain Sweden Switzerland Tu
7、rkey United Kingdom U.S.A. U.S.S.R. Yugoslavia No member body expressed disapproval of the document. 0 Intrrnetional Organization for Standardization, 1977 ? Printed in Switzerland Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Defense Supply
8、 Ctr/9960866100 Not for Resale, 04/24/2007 10:59:10 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD IS0 4247-1977 (E) Jig bushes and accessories for drilling purposes - Dimensions 1 SCOPE AND FIELD OF APPLICATION This international Standard specifies
9、the dimensions of bushes to be fitted to jigs for guiding twist drills, and of accessories for use with renewable bushes. It deals with the following subjects : - press-fit bushes, which may be either headed or headless; - liners, which may be either dimensions of which are taken of bushes; headed o
10、r headless, the from the press-fit range - renewable bushes, fixed type and slip type; - methods of retaining renewable bushes; - accessories (i.e. tenons, locking screws and stop pins). NOTE - The methods of retaining bushes described in clause 6 are in general use, and member bodies will normally
11、select one of these methods for their national standards. If so desired, it is permitted to supply renewable bushes which can be used either as fixed type or slip type by providing the heads with the necessary features. 2 REFERENCE IS0 4248, Jig bushes - Definitions and nomenclature. ) 3 TOLERANCES
12、The definitive tolerances to be used are still subject to discussion. In the meantime, for jig bushes used for general purposes, the following tolerances are recommended : 3.1 Tolerances for press fit bushes and liners - F7 on bore diameter; - n6 on body diameter; - h13 on head diameter. 3.2 Toleran
13、ces for renewable bushes - F7 on bore diameter; - m6 on body diameter; - h13 on head diameter. 3.3 Tolerances on stop pins Stop pins, when required, shall be supplied with a tolerance of m6. When this type of pin is to be used, the bush manufacturer shall provide a locating hole, with a tolerance of
14、 H7, in the head of the bush, positioned according to the dimensions shown in table 4. 3.4 Tolerance for jig-plate holes Press-fit bushes and liners shall be located in holes which have an H7 tolerance. 1 I At present at the stage of draft. Copyright International Organization for Standardization Pr
15、ovided by IHS under license with ISO Licensee=Defense Supply Ctr/9960866100 Not for Resale, 04/24/2007 10:59:10 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 4247-1977 (El 4 PRESS-FIT BUSHES AND LINERS rm of the undercut is left manufacturer FIGURE 1 - Press-fit bush
16、or liner - Headed type FIGURE 2 - Press-fit bush or liner - Headless type TABLE 1 - Dimensions of liners Values in millimetres Diameter of bore dl IF71 8 10 12 15 18 22 26 30 35 42 48 55 62 70 78 85 95 165 Lead Diameter Head Length 1 on outside Entry Concen- tricity of body - chamfer ) diameter thic
17、kness diameter (F.I.M.) d dz 11 short long extra- 12 13 V (n6) (h13) long max. max. 12 15 10 16 - 1.25 1,5 3 15 18 12 20 25 18 22 1,5 2 22 26 4 0.02 16 28 36 26 30 30 34 20 36 45 35 39 2.5 3 42 46 5 25 45 56 48 52 55 59 62 66 30 56 67 3.5 70 74 78 82 35 67 78 3.6 W4 85 90 6 95 100 40 78 105 4 105 11
18、0 115 120 45 89 112 125 130 1) Asan alternative, a radius may be used 2 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Defense Supply Ctr/9960866100 Not for Resale, 04/24/2007 10:59:10 MDTNo reproduction or networking permitted without licens
19、e from IHS -,-,- IS0 4247-1977 (El TABLE 2 - Dimensions of press-fit bushes Values in millimetres Diameter of bore (F7) I Head of body d (n6) 3 diameter thickness da 4 L-L (hl3) 6 95 105 125 130 I) As an alternative, a radius may be used. short Length 1 Lead on outside extra- diameter long 12 max. 6
20、 9 _ 1 8 12 16 10 12 16 20 25 16 20 1.25 20 25 1.5 28 36 36 45 2.5 45 56 30 35 40 45 56 67 3.5 67 78 3 78 105 89 112 Entry zhamferl ) 13 max. 1 1.5 2 3 4 Concan- tricity (F.I.M.) V 0.0 1 0.02 0.04 3 Copyright International Organization for Standardization Provided by IHS under license with ISO Licen
21、see=Defense Supply Ctr/9960866100 Not for Resale, 04/24/2007 10:59:10 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 4247-1977 (E) 5 RENEWABLE BUSHES 5.1 General dimensions The form of the undercut is left to the manufacturer FIGURE 3 - Renewable bush TABLE 3 - General
22、 dimensions of renewable bushes Values in millimetres Head details washer details diameter thickness diameter thickness d2 11 6 5 (hl3) 0 0 - 0.25 - 0.25 15 12 8 - 18 15 22 18 Length under haad 45 89 112 Entry :hamfer 1) 13 (max.) 1 .o Zoncen- tricity lF.I.M.1 V 0.02 0.04 I As an alternative, a radi
23、us may be used. 4 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Defense Supply Ctr/9960866100 Not for Resale, 04/24/2007 10:59:10 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 4247-1977 (E) 5.2 Head details Wi
24、th tenon or With stop pin and locking screw+ocking screw I I _, I8 ,_ Lc, a) Fixed type Renewable bushes may be supplied with one or both facilities of retention b) slip type FIGURE 4 - Renewablebush head TABLE 4 - Head details Values in millimetres I With tenon or locking screw I With stop pin 48 5
25、5 7 40.5 12.5 25 14 55 62 7 45.5 12.5 25 8 8 62 JO 7 50.5 12,5 20 JO 78 7 55.5 12.5 20 16 78 85 7 60.5 12.5 20 I 5 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Defense Supply Ctr/9960866100 Not for Resale, 04/24/2007 10:59:10 MDTNo reproduc
26、tion or networking permitted without license from IHS -,-,- IS0 4247-1977 (E) 6 METHODS OF RETAINING RENEWABLE BUSHES (see note to clause I) Liner head flush Headless liner I , Fixing screw Tenon a) Liner head flush or headed b) Liner head proud FIGURE 5 - Renewable bush used with retaining tenon Li
27、ner head flush 1 Headless liner M I Locking screw I- a) Liner head flush or headed b) Liner head proud FIGURE 6 - Renewable bush with locking screw FIGURE 7 - Renewable bush - FIGURE 8 - Renewable bush - Fixed type with tenon or locking screw Slip type with tenon or locking screw 6 Copyright Interna
28、tional Organization for Standardization Provided by IHS under license with ISO Licensee=Defense Supply Ctr/9960866100 Not for Resale, 04/24/2007 10:59:10 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 4247-1977 (E) Head flush Headless liner Liner may be headed (flush)
29、or headless FIGURE 9 - Renewable bush - Slip type with stop pin and locking screw TABLE 5 - Mounting dimensions Values in millimetres dl over _ 4 6 8 10 12 15 18 22 26 30 35 42 46 55 62 70 76 (F7) up to and includina 4 6 6 10 12 15 18 22 26 30 35 42 46 55 62 70 76 65 c2 15 17 20 22 24 26 31 35 37 41
30、 47 51 55 59 63 66 74 79 C min. 11.5 13 16 ia 20 23.5 26 29.5 32.5 36 41 45 49 53 58 63 68 73 7 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Defense Supply Ctr/9960866100 Not for Resale, 04/24/2007 10:59:10 MDTNo reproduction or networking
31、permitted without license from IHS -,-,- IS0 4247-1977 (El 7 ACCESSORIES 7.1 Tenon FIGURE 10 -Tenon TABLE 6 - Dimensions of tenon Values in millimetres Inside diameter of 9 111 Size of bush with which when liner when liner when liner when liner IQ & d6 d7 rt 112 fixing tenon is to be used head is fl
32、ush head is proud head is flush head is proud screw Oto 6 8 11 3 6 4 13 IO 5,l 9.5 3.7 M5 6to 12 10 14 4 8 5 16 12 6.1 15 4.7 M6 I 12to30 I 12 I 17 I 5.5 I IO,5 1 5 1 20 1 15 1 8.1 I30 I 6.2 I M8 I 1 30 to 85 I 16 22 I 7 13 7 24 18 10.1 80 7.5 Ml0 7.2 Locking screw FIGURE 11 - Locking screw TABLE 7
33、- Dimensions of locking straws Values in millimetres of bush with which screw is to be used a Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Defense Supply Ctr/9960866100 Not for Resale, 04/24/2007 10:59:10 MDTNo reproduction or networking pe
34、rmitted without license from IHS -,-,- IS0 4247-1977 (E) 7.3 Stop pin FIGURE 12 -Stop pin TABLE 8 - Dimensions of stop pins Values in millimetres Inside diameter of bush with d4 which pin is to be used m6 Oto 6 2.5 I16 16 6to 12 3 20 12to22 5 25 22 to 30 6 30 30 to 42 6 35 42 to 78 a 35 78 t0 a5 a 40 9 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Defense Supply Ctr/9960866100 Not for Resale, 04/24/2007 10:59:10 MDTNo reproduction or networking permitted without license from IHS -,-,-