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UDC 622.233
I NT ERN AT ION AL ORGAN I ZAT I O N FOR STAND A RD I Z AT1 O N
IS0 RECOMMENDATION
R 723
ROCK DRILLING
FORGED COLLARED SHANKS AND CHUCK BUSHINGS
FOR HOLLOW HEXAGONAL DRILL STEELS
1st EDITION
May 1968
COPYRIGHT RESERVED
The copyright of IS0 Recommendations and IS0 Standards
belongs to IS0 Member Bodies. Reproduction of these
documents, in any country, may be authorized therefore only
by the national standards organization of that country, being
a member of ISO.
For each individual country the only valid standard is the national standard of that country.
Printed in Switzerland
Also issued in French and Russian. Copies to be obtained through the national standards organizations.
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BRIEF HISTORY
The IS0 Recommendation R 723, Rock drilling-Forged collared shanks and chuck
bushings for hollow hexagonal drill steels, was drawn up by Technical Committee ISO/TC 82,
Mining, the Secretariat of which is held by the Deutscher Normenausschuss (DNA).
Work on this question by the Technical Committee began in 1960 and led, in 1964, to
the adoption of a Draft IS0 Recommendation.
In April 1965, this Draft IS0 Recommendation (No. 802) was circulated to all the
IS0 Member Bodies for enquiry. It was approved, subject to a few modifications of an
editorial nature, by the following Member Bodies :
Australia Japan Sweden
Belgium Korea, Rep. of Turkey
Brazil Netherlands U.A.R.
Chile New Zealand United Kingdom
Czechoslovakia Poland Yugoslavia
France Portugal
Germany South Africa,
Hungary Rep. of
India
Spain
One Member Body opposed the approval of the Draft:
U.S.S.R.
The Draft IS0 Recommendation was then submitted by correspondence to the IS0
Council, which decided, in May 1968, to accept it as an IS0 RECOMMENDATION.
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IS0 / R 723 - 1968 (E)
IS0 Recommendation R 723 May 1968
ROCK DRILLING
FORGED COLLARED SHANKS AND CHUCK BUSHINGS
FOR HOLLOW HEXAGONAL DRILL STEELS
1. FORGED COLLARED SHANKS FOR HOLLOW HEXAGONA
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