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1、INTERNATIONAL STANDARD 298 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION .MEXAYHAPOflHAR OPTAHASAWR II0 CTAHflAPTW3AUHA .ORGANISATION INTERNATIONALE DE NORMALISATION Machine tools - Lathe centres - Sizes for interchangeability First edition - 1973-12-15 UDC 621.9.06 : 62-229.33 Ref. No. IS0 298-197
2、3 (E) Descriptors : machine tools, lathes, lathe tools, shanks, morse taper shanks, taper, dimensions, interchangeability. Price based on 3 pages Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Res
3、ale, 04/27/2007 10:58:07 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 carri
4、ed 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. Draft
5、 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. Prior to 1972, the results of the work of the Technical Committees were published as IS0 Recommendations; these documen
6、ts are now in the process of being transformed into International Standards. As part of this process, Technical Committee ISO/TC 39 has reviewed IS0 Recommendation R 298 and found it suitable for transformation. International Standard IS0 298 therefore replaces IS0 Recommendation R 298-1963 and Adde
7、ndum 1-1969. IS0 Recommendation R 298 was approved by the Member Bodies of the following countries : Argentina Belgium Chile Colombia Czechoslovakia Denmark France Germany Hungary India Israel Italy Japan Netherlands New Zealand Poland Portugal Romania Spain Sweden Switzerland United Kingdom U.S.A.
8、U.S.S.R. The Member Body of the following country has subsequently approved this Recommendation : Philippines No Member Body expressed disapproval of the Recommendation. No Member Body disapproved the transformation of ISO/R 298 into an International Standard. 0 international Organization for Standa
9、rdization, 1973 ? Printed in Switzerland Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 10:58:07 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERN
10、ATIONAL STANDARD IS0 298-1973 (El Machine tools - Lathe centres - Sizes for interchangeability 1 SCOPE AND FIELD OF APPLICATION This International Standard specifies the sizes for interchangeability of lathe centres. Its scope should not be regarded as restricted to lathes only, but may be extended
11、to all the other machine tools with centres of the same type. 2 DESIGNATION The lathe centre shall be designated by the number followed by the type. Example : No. 3 Morse Centre. 3 SIZES The centre sizes given in the tables which follow are only those necessary for interchangeability; details of des
12、ign (for example for the extracting device), which do not directly affect interchangeability, are not included. Sizes for interchangeability of the taper shank with the machine are in compliance with IS0 296, Machine-tools - Self-holding tapers for tool shanks. Table 1 gives sizes in millimetres for
13、 centres with Nos. 0 to 6 Morse or metric 5 % taper shanks. Table 2 gives sizes in inches for centres with Nos. 1 to 6 Morse or Nos. 1 to 3 Brown & Sharpe taper shanks. The angle of the centre itself is fixed at 60” min. When a greater angle is really necessary for particularly heavy workpieces, eit
14、her 75 min. or 90” min. shall be adopted. In this case, the following designation should be stated : “75” Centre” or “90” Centre”. 1 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/20
15、07 10:58:07 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 298-1973 (El 3.1 Sizes in millimetres Interchangeability with the workpiece Interchangeability with the machine TABLE 1 - Lathe centres with Nos. 0 to 6 Morse or metric 5 % taper shanks Taper shank Centre Desig
16、nation Taper D II max. 01 Tvpe No. h9 4 1 20 : = 0.05 4 23 4.1 Metric 5% 6 1 20 : = 0.05 6 32 6.2 0 0.6246: 12 = 0,052 05 9,045 50 9.2 1 0,598 58 : 12 = 0,049 88 12,065 53.5 12,2 2 0.59941 : 12 = 0,049 95 17,780 64 18,0 Morse 3 0,602 35 : 12 = 0,050 20 23,825 81 24.1 4 0,623 26 : 12 = 0.051 94 31,26
17、7 102.5 31.6 5 0,631 51 : 12 = 0,052 63 44,399 129.5 44.7 6 0,625 65 : 12 = 0,052 14 63,348 182 63.8 60 1 : 20 Metric = 0.05 80 196 80.4 5% 100 1 : 20 = 0.05 100 232 100.5 For sizes of centres with Brown & Sharps taper shanks, see table 2. 2 Copyright International Organization for Standardization P
18、rovided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 10:58:07 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 298-1973 (E) 3.2 Sizes in inches Interchangeability interchangeability with the workpiece with the ma
19、chine TABLE 2 - Lathe centres with Nos. 1 to 6 Morse or Nos. 1 to 3 Brown & Sharpe taper shanks Designation Taper shank Centre I I Brown RI Sharpe I 1 I 0.502 = 0.04183 00 : 12 0.239 I 15/16 I 0.243 2 0.502 00 12 : = 0.04183 0.299 13/16 0.303 3 0.502 00 : 12 = 0.041 83 0.375 1 l/2 0.379 Morse 1 0.59
20、8 58 : 12 = 0.049 88 0.475 2 l/8 0.481 2 0.59941 : 12 = 0.049 95 0.700 2 9/16 0.709 3 0.602 35 : 12 = 0.050 20 0.938 3 3/16 0.947 I 4 I 0.623 = 0.051 26 : 94 12 1.231 4 l/16 I 1.244 I 5 I 0.631 = 0.052 51 : 63 12 1.748 5 3/16 I 1.760 I 6 I 0.625 = 0.052 65 : 14 12 2.494 7 l/4 I 2.510 For sizes of ce
21、ntres with metric 5 % taper shanks and with No. 0 Morse taper shanks, see table 1. 3 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 10:58:07 MDTNo reproduction or networking permitted without license from IHS -,-,-