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IS0
INTERN AT1 Q NA L ORGAN IZATl Q N
FQ R STAND AR D I ZATl O N
ADDENDUM 2
TO
I so
R E COM M EN DATI O N
R 297
7/24 TAPERS FOR TOOL SHANKS
TAPERS Nos. 65 TO 80 (METRIC DIMENSIONS)
1st EDITION
May 1974
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BRIEF HISTORY
Addendum 2 to IS0 Recommendation KO/R 297-1963 was drawn up by Technical Committee ISO/TC 39,
Machine tools. and circulated to the Member Bodies in November 1972.
It has been approved by the Member Bodies of the following countries :
Australia Hwgasr Sweden
Belgium India Thailand
Czechoslovakia Italy Turkey
Egypt, Arab Rep. of Japan United Kingdom
France Romania
Gelltlany South Africa, Rep. of
The Member Body of the following country expressed disapproval of the document on technical grounds :
Switzerland
O International Organization for Standardization, 1974 O
Printed in Switzerland
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ISO/R 297-1963IAdd 2-1974 (E
Addendum 2 to IS0 Recommendation ISO/R 297-1963
7/24 TAPERS FOR TOOL SHANKS
TAPERS Nos. 65 to 80 (METRIC DIMENSIONS)
SCOPE
IS0 Recommendation R 297-1963 specifies the characteristics of 7/14 tapers Nos. 30, 40. 50 and 60. It has
been supplemented by addendum I in March, 1971. for the insertion of tapers Nos. 45 and 55.
This second addendum specifies the characteristics of tapers Nos. 65. 70, 75 and 80 (metric dimensions).
Tapers Nos. 65, 70. 75 and 80 (dimensions in inches) will be the subject of addendum 3.
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ISO/R 297-1%3/hdd. 2-11974
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