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UDC 621.9: 003.62
IS0
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION
IS0 RECOMMENDATION
R 369
SYMBOLS FOR INDICATIONS
APPEARING ON MACHINE TOOLS
1st EDITION
April 1964
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 369, Symbols for Indications Appearing on Machine Tools,
uas drawn up by Technical Committee ISO/TC 39, Machine Tools, the Secretariat of which is
held by the Association Française de Normalisation (AFNOR).
Work on this question by the Technical Committee began in 1953 and led, in 1960, to the
adoption of a Draft IS0 Recommendation.
In October 1961, this Draft IS0 Recommendation (No. 481) 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 Greece Poland
Austria Hungary Portugal
Belgium India Sweden
Colombia Ireland Switzerland
Czechoslovakia Italy United Kingdom
France Japan U.S.A.
Germany Norway U.S.S.R.
The Draft IS0 Recommendation was then submitted by correspondence to the IS0
Council, which decided, in April 1964, to accept it as an IS0 RECOMMENDATION.
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ISOlR 369 - 1964(E)
I
IS0 Recommendation R 369 April 1964
SYMBOLS FOR INDICATIONS APPEARING ON MACHINE TOOLS
CONTENTS
No. Page
Introduction 3
Section 1. Symbols for movements and speeds 1 to 35 4
Section 2. Symbols for elements 41 to 53 7
Section 3. Symbols for manoeuvres 61 to 81 9
Section 4. Symbols for safety 91 to 94 11
Section 5. Various symbols 101 to 109 12
INTRODUCTION
SCOPE
This IS0 Recommendation defines the symbols which may appear on machine-tool indicator plates
or control buttons in order to give the operator ail useful indications for the use of the machine.
These conventional symbols have been chosen so as to be understood in all countries, indepen-
dently of the language spoken in each individual country.
They may be later supplemented by other symbols (see note below).
The existence of this IS0 Recommendation, which includes a relatively large number of symbols,
does not mean that ali these symbols should appear on the machines. On the contrary, it is essen-
tial that a choice be made among the standardized symbols so as to use only those symbols which
are strictly required for the use of each particular machine.
IMPORTANT NOTE
This IS0 Recommendation should be considered only as a preliminary step, for immediate appli-
cation.
When it is revised later, taking account of the results of its application, it will be supplemented
with other symbols which may appear as being necessary, and it may possibly be slightly amended
in order to make some symbols more easily understood by the machine operators.
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ISOlR 369 - 1964(E)
1. SYMBOLS FOR MOVEMENTS AND SPEEDS
No. Designations Symbols Observations
-
1 Direction of continuous
rectilinear motion
2 Rectilinear motion in two
directions
3 Interrupted rectilinear motion
c
4 Limited rectilinear motion
5 Limited rectilinear motion and
return
6 Oscillating rectilinear motion
(continuous)
W
7 Direction of continuous rotation
n
8 Rotation in two directions
n
9 Direction of interrupted rotation
10 Limited rotation
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Symbois Observations
Designations
Limited rotation and return
Oscillating rotary movement
(continuous)
Direction of spindle rotation
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One revolution
x being the value of the number of
Number of revolutions per minute
revolutions to appear, as the case
(spindle speed)
may be, either before the symbol or
X O/, .
in the corresponding numerical table.
Feed
x being the value of the feed to ap-
Feed per revolution
pear, as the case may be, either be-
fore the symbol or in the correspond-
ing numerical table (if the feed is
expressed in inches or in feet, the
symbolic abbreviation for unit mm
should be replaced by in or ft).
x being the value of the feed to ap-
Feed per minute
pear, as the case may be, either be-
Wxmmlrnin
fore the symbol or in the correspond-
ing numerical table (if the feed is
expressed in inches or in feet, the
symbolic abbreviation for unit mm
should be replaced by in or ft).
i/x being the value of the ratio of
Reduced feed
the reduced feed to the normal feed
MAAI llx
(the symbol should be drawn with a
pitch half the size if it is intended to
show more clearly the distinction
from the normal feed).
x/l being the value of the ratio of the
Rapid feed
rapid feed to the normal feed (the
MAAI xll
symbol should be drawn with a pit
...