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IS0
I NTE R N AT1 ON A L O RG A N I2 AT1 ON FO R STA N DARD I2 AT I O N
IS0 RECOMMENDATION
R 496
SHAFT HEIGHTS
FOR DRIVING AND DRIVEN MACHINES
1st EDITION
August 1966
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 496, Shaft Heights for Driving and Driven Machines, was
drawn up by Technical Committee ISO/TC 13, Shaft Heights of Machinery, the Secretariat of
which is held by the Institut Belge de Normalisation (IBN).
Work on this question by the Technical Committee began in 1951, taking into account
the studies which had been made by the former International Federation of the National Stand-
ardizing Associations (ISA), and led in 1957 to the adoption of a Draft IS0 Recommendation.
This first Draft IS0 Recommendation (No. 180) was circulated to all the IS0 Member
Bodies for enquiry in September 1957. As the results of this consultation were not considered
satisfactory, the Technical Committee presented a second Draft IS0 Recommendation, which
was circulated to all the Member Bodies in March 1964 and which was approved by the follow-
ing Member Bodies:
Argentina Germany Spain
Austria Greece Sweden
Switzerland
Bulgaria Israel
Chile Japan Turkey
Colombia Korea, Rep. of United Kingdom
U.S.A.
Czechoslovakia Netherlands
New Zealand U.S.S.R.
Denmark
France Portugal Yugoslavia
Two Member Bodies opposed the approval of the Draft:
Belgium
India
The second Draft IS0 Recommendation was then submitted by correspondence to the
IS0 Council, which decided, in August 1966, to accept it as an IS0 RECOMMENDATION.
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ISO/R 496 - 1966 (E)
IS0 Recommendation R 496 August 1
SHAFT HEIGHTS FOR DRIVING AND DRIVEN MACHINES
1. DEFINITION
The shaft height is the distance, measured on the machine ready for delivery, between the ce1
line of the shaft and the base plane of the machine itself. It does not include the liners usec
assembly. In cases where an insulation shim is supplied with the machine, the thicknes
this shim should be included in the shaft height.
2. NOMINAL DIMENSION h
Driving inochine ,- Driven machine
TABLE 1. - Shaft heights in millimetres * and in inches
Shaft heights
millimetres
Series Series
IV
I II III IV I II ~ III V
~ ~~~
25 25 25 25 0.984 0.984 0.984 0.984
26 1 .O24
28 1.102 1.102
28
30 1.181
32 32 32 1.260 1.260 1.260
34 1.339
36 36 1.41 7 1.41 7
38 1.496
40 40 40 40 1.575 1.575 1.575 1.575
42 1.654
45 45 1.772 1.772
48 1.890
50 50 50 1.969 1.969 1.969
2.09
53
56 56 2.20 2.20
60 2.36
* The values in millimetres of the series I to IV correspond respectively, however with some roundings, to the v
of the preferred numbers R 5, R 10, R 20, R 40 (see IS0 Recommendation R 3, Preferred Numbers - Series of
ferred Numbers).
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ISO/R 496 - 1966 (E)
TABLE 1. - Shaft heights in millimetres * and in inches (continued)
Shaft heights
millimetres inches
Series Series
IV
I II III IV I II III V
__ . ~~~ ~~
63 63 63 63 2.48 2.48 2.48 2.48
2.625
67 2.64
71 71 2.80 2.80
75 2.95
3
80 80 80 3.15 3.15 3.15
3.35
85
3.5
90 90 3.54 3.54
95 3.74
1 O0 1 O0 1 O0 1 O0 3.94 3.94 3.94 3.94
4.125
4.17
106
112 112 4.41 4.41
4.5
118 4.65
125 125 125 4.92 4.92 4.92
5.20
132
5.25
140 140 5.51 5.51
150 5.91
6.25
160 160 160 160 6.30 6.30 6.30 6.30
6.69
170
7
180 180 7.09 7.09
190 7.48
200 200 200 7.87 7.87 7.87
8
212 8.35
225" 8.86
225" 8.86
9
236 9.29
250 250 250 250 9.84 9.84 9.84 9.84
10
10.43
265
11
11.02
280 280 Il .O2
300 11.81
315 315 315 12.40 2.40 12.40
12.5
335 13.19
13.98
355 355 3.98
375 14.76
400 400 400 400 15.75 15.75 5.75 15.75
16.73
425
17.72
450 450 17.72
475 18.70
500 500 500 19.69 19.69 19.69
530 20.87
560 560 22.05 22.05
600 23.62
* The values in millimetres of the series I to IV correspond respectively, however with some roundings, to the values
of the preferred numbers R 5, R 10, R 20, R 40 (see IS
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