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1、INTERNATIONAL STANDARD IS0 240 Second edition 1994-l o-01 Milling cutters - Interchangeability dimensions for cutter arbors or cutter mandrels Fraises 2 m&aux - Dimensions dinterchangeabilit6 avec /es arbres Porte-fraises ou /es mandrins Porte-fraise Reference number IS0 240:1994(E) Foreword IS0 (th
2、e International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 technical committees. Each member body interested in a subject for which a technical committ
3、ee 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. IS0 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechn
4、ical standardization. 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. International Standard IS0 240 was prepared by Tech
5、nical Committee lSO/TC 29, Small too/s, Subcommittee SC 7, Milling cutters and milling machine accessories. This second edition cancels and replaces the first edition (IS0 240:1975), which has been technically revised. Annex A of this International Standard is for information only. 0 IS0 1994 All ri
6、ghts reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Organization for Standardization Case Post
7、ale 56 ? CH-1211 Genbve 20 ? Switzerland Printed in Switzerland ii -,-,- INTERNATIONAL STANDARD 0 IS0 IS0 240:1994(E) Milling cutters - Interchangeability dimensions for cutter arbors or cutter mandrels 1 Scope Tables giving the conversion of the metric values into inches are given in annex A. This
8、International Standard specifies the dimensions for interchangeability between the cutter and the ar- bor or mandrel, i.e. the diameter of the bore and the arbor or mandrel and elements of the drive, whether by keying or tenon. It applies to all types of milling cutters mounted on cutter arbors or m
9、andrels. 2 Key drive See figure 1 and table 1. 3 Tenon drive Two groups of tables have been established, relating respectively to the key drive and the tenon drive. See figure 2 and table 2. -,-,- IS0 240: 1994(E) Od Keyway in cutter Od Key sections Square Rectangular Keyway in arbor Figure 1 -,-,-
10、CJ IS0 IS0 240:1994(E) Table 1 Dimensions in millimetres T d I a b C I Cl e r 6 Z tot nom. tol. nom. to1. 1) 32 40 50 60 70 80 100 1) 8 10 12 14 16 18 25 hll nom. tol. nom. tol. 6.7 83 8.2 11.5 11.2 14.6 0 +0,1 -0.1 0 13.2 17,7 15.6 21,l 17,6 24,l 22 29,8 7 27 34.8 8 34,5 43,5 8 44,5 0 +0,2 -0.2 0 9
11、 54 IO 63,5 11 73 14 91 nom. 0 -0.1 0 -0.2 0,03 0,4 03 +0.09 0 0 -0.08 0.16 0.16 0,035 1 f0.15 0 0 -0.09 0.25 0.25 0 -0.3 2.5 1.2 1.6 0.4 +0.2 0 2 0,6 25 0,04 0,045 -:.15 0.4 -:,z 03 0,055 1) Tolerances - on d (except for gear bobs) on the arbor: h6 on the cutter: H7 - ona for keyway in arbor: free
12、keying: H9 close keying: N9 for keyway in cutter: Cl 1 key: h9 3 -,-,- IS0 240:1994(E) Q IS0 Figure 2 d 1) 5 8 10 13 16 19 22 27 32 40 50 a hll 3 5 6 8 10 12 14 16 18 Arbor b hll 2 3.5 4 4,5 5 5.6 6.3 7 8 9 r max. 0,3 0.4 0.5 0,6 OB 1 Table 2 Dimensions in millimetres Cutter al 4 rl e Z Hll HI3 max.
13、 nom. tol. 3,3 25 0,3 0,15 006 5.4 4 0,4 +0.1 0 64 4,5 03 0.5 5 8,4 1 56 086 IO,4 63 12 +o,z 0 02 12,4 7 Or8 14,4 8 18 16.4 9 18,4 10 2 1 +0,3 0 60 20 IO 1) Tolerances on d (except for gear hobs) on the arbor: h6 on the cutter: H7 20,5 II,2 0,25 4 IS0 240:1994(E) Annex A (informative) Conversion fro
14、m metric series to inches A.1 Key drive See figure 1 and table A.1. Table A.1 Dimensions en inches C Cl e r fi Desig- Desig- d d a a b b nation nation 1) 1) 1) 1) 11 11 8 8 0,314 0,314 9 9 0,079 0,079 10 10 0,393 0,393 7 7 0,118 0,118 13 13 0,511 0,511 8 8 0,118 0,118 16 16 0,629 0,629 9 9 0,157 0,1
15、57 19 19 0,748 0,748 0 0 0,197 0,197 22 22 0,866 0,866 1 1 0,236 0,236 27 27 1,063 1,063 0 0 0,276 0,276 z 0,001 2 0,001 4 tol. nom. nom. nom. 0,264 0,323 0,016 0,006 +0.004 0 0 -0.004 0,006 0,441 0 -0,004 0,520 0,024 0 -0,008 0,614 0,831 0,039 0,693 0,010 0,866 0 -0.012 32 1,259 8 0,315 0,2 t 40 1.
16、574 8 0,394 0.3 1,063 0.047 1,358 50 1,968 5 0,472 0,3 1,752 1 2,362 2 / 0,551 1 0.3 60 2,126 0 -0,008 +o.om 0 0,063 0,016 0,016 1 2,755 9 / 0,630 / 0,3! 70 2,500 +0.006 0 +0,008 0 0 -0.020 0,079 80 3,149 6 0,709 0,4. 2.874 100 3.937 0 0,984 0,5 3,583 0,024 0,098 0,024 1) Tolerances: direct conversi
17、on into inches of the metric values of the tolerances h6, h9, hll, H7, H9, N9 and Cll. 0 -0,003 0 -0.044 0 -0,006 0 -0.008 0,001 6 0,001 8 IS0 240: 1994(E) A.2 Tenon drive See figure 2 and table A.2. Table A.2 0,315 0,331 0,040 16 0,629 9 0,197 0,220 19 0,748 0 0,024 0,394 0,220 0,410 0,248 0,050 22
18、 0,866 1 27 1,063 0 0,472 0,248 0,488 0,276 0,031 32 1,259 8 0,551 0,276 0,567 0,316 0,060 40 1,574 8 0,630 0,315 0,646 0,355 50 1,968 5 0,709 0,354 0,039 0,725 0,394 0,080 60 2,362 2 0,787 0,394 0,807 0,441 Dimensions in inches nom 0,012 0,006 0,016 +0.004 0 0,020 0,024 0,031 0,039 e tol. +0.008 0 +0.012 0 0,008 0,Ol 1) Tolerances: direct conversion into inches of the metric values of the tolerances h6, hl 1, H7, HI 1 and H13. 6 -,-,- IS0 240:1994(E) KS 25.100.20 Descriptors: tools, cutting tools, milling cutters, milling cutter arbors, dimensions, interchangeability. Price based on 6 Pages