IEC 61755-6-1 Ed. 1.0

SLOVENSKI STANDARD
SIST IEC 60072-1:2001
01-marec-2001
Dimensions and output series for rotating electrical machines - Part 1: Frame
numbers 56 to 400 and flange numbers 55 to 1080
Dimensions and output series for rotating electrical machines - Part 1: Frame numbers
56 to 400 and flange numbers 55 to 1080
Dimensions et séries de puissances des machines électriques tournantes - Partie 1:
Désignation des carcasses entre 56 et 400 et des brides entre 55 et 1080
Ta slovenski standard je istoveten z: IEC 60072-1
ICS:
29.160.01 Rotacijski stroji na splošno Rotating machinery in
general
SIST IEC 60072-1:2001 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------

SIST IEC 60072-1:2001

---------------------- Page: 2 ----------------------

SIST IEC 60072-1:2001
NORME CEI
INTERNATIONALE IEC
72-1
INTERNATIONAL
Sixième édition
STANDARD Sixth edition
1991-02
Dimensions et séries de puissances
des machines électriques tournantes
Partie 1:
Désignation des carcasses entre 56 et 400
et des brides entre 55 et 1080
Dimensions and output series for
rotating electrical machines
Part 1:
Frame numbers 56 to 400 and
flange numbers 55 to 1080
© CEI 1991 Droits de reproduction réservés — Copyright — all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in
utilisée sous quelque forme que ce soit et par aucun pro- any form or by any means, electronic or mechanical,
cédé, électronique ou mécanique, y compris la photocopie et includng photocopying and microfilm, without permissioni
les microfilms, sans l'accord écrit de l'éditeur. in writing from the publisher.
Bureau Central de la Commission Electrotechnique Inte rnationale 3, rue de Varembé Genève, Suisse
Commission Electrotechnique Internationale
CODE PRIX "^
International Electrotechnical Commission
PRICE CODEPRICE CODE
IEC MemityliapoAHaa 3ne,rpoTexiimecHaR
KoMNCCNA
Pour prix, voir catalogue en vigueur
For price, see current catalogue

---------------------- Page: 3 ----------------------

SIST IEC 60072-1:2001
72-1 © CEI — 3 —
CONTENTS
Page
FOREWORD 5
Clause
1. Scope 7
2. Letter-symbols for dimensions 7
9
3. Designation of machines
11
4. Location of the terminal box
11
4.1 Machines with feet
4.2 Machines with flange only 11
Position of holes in the mounting flange 11
5.
11
6. Fixing dimensions
6.1 Foot-mounted machines 11
6.2 Flange-mounted machines 17
Shaft extension, keys and keyways dimensions. Greatest permissible torques on continuous
7.

duty for a.c. motors 19
8. Tolerances for flange-mounted machines 21
8.1 Shaft extension run-out 21
8.2 Concentricity of spigot diameter and perpendicularity of mounting face of flange to
shaft 23
Methods of measurement 23
8.3
8.3.1 Shaft extension run-out 23
8.3.2 Concentricity of spigot and shaft 25
25
8.3.3 Perpendicularity of mounting face of flange to shaft
Tolerances for machines other than flange-mounted machines 25
8.4
27
9. Preferred rated output values
31
10. Dimensional sketches
ANNEXES
A Guide for the selection of dimensions 33
B Reference planes and symbols for mounting dimensions of rotating electrical machines 45
C General requirements on tolerances and limit values for mounting dimensions 89
111
D Conversion millimetre/inches and kilowatt/horsepower

---------------------- Page: 4 ----------------------

SIST IEC 60072-1:2001
— 5 —
72-1 © IEC
INTERNATIONAL ELECTROTECHNICAL COMMISSION
DIMENSIONS AND OUTPUT SERIES
FOR ROTATING ELECTRICAL MACHINES
Part 1: Frame numbers 56 to 400 and flange numbers 55 to 1080
FOREWORD
1) The formal decisions or agreements of the IEC on technical matters, prepared by Technical Committees on which all the
National Committees having a special interest therein are represented, express, as nearly as possible, an international
consensus of opinion on the subjets dealt with.
2) They have the form of recommendations for international use and they are accepted by the National Committees in that sense.
3) In order to promote international unification, the IEC expresses the wish that all National Committees should adopt the text of
the IEC recommendation for their national rules in so far as national conditions will permit. Any divergence between the IEC
recomendation and the corresponding national rules should, as far as possible, be clearly indicated in the latter.
This part of the International Standard IEC 72 has been prepared by Sub-Committee 2B: Mounting
dimensions and output series, of IEC Technical Committee No. 2 : Rotating machinery.
This sixth edition of IEC 72-1 replaces the fifth edition of IEC 72 (1971) and its Amendments Nos. 1
and 2, issued in 1977 and 1981 respectively.
The text of this part is based on the following documents:
Two Months' Procedure Reports on Voting
Six Months' Rule Reports on Voting
2B(CO)65
2B(CO)51 2B(CO)56 2B(CO)60
2B(CO)52 2B(CO)57 . — —
2B(CO)68A 2B(CO)71
2B(CO)61 2B(CO)66
2B(CO)62 2B(CO)67 — —
2B(CO)70 2B(CO)73 — —
Full information on the voting for the approval of this can be found in the Voting Reports indicated in
the above table.
Annexes A, B and C have the status of a report; annex is informative.
The following publications are quoted in this part of IEC 72:
IEC 34-1: 1983, Rotating electrical machines — Part 1: Rating and performance.
IEC 34-8: 1972, Rotating electrical machines — Part 8: Terminal markings and direction of rotation machines.
IEC 50(411): 1973 , International Electrotechnical Vocabulary (IEV) — Chapter 411: Rotating machines.
Fasteners — Clearance holes for bolts and screws.
ISO 273: 1979,
Driving and driven machines — Shaft heights.
ISO 496: 1973,
Rectangular or square parallel keys and their corresponding keyways (dimensions in millimetres).
ISO/R 773: 1969,
ISO/R 775: 1969, Cylindrical and 1/10 conical shaft ends.
ISO 1101: 1983, Technical drawings — geometrical tolerancing — tolerancing of form, orientation, location and run-out —
Generalities, definitions, symbols, indications on drawings.
ISO 2768: 1973, Permissible machining variations in dimensions without tolerance indication.

---------------------- Page: 5 ----------------------

SIST IEC 60072-1:2001
72-1 © IEC — 7 —
DIMENSIONS AND OUTPUT SERIES
FOR ROTATING ELECTRICAL MACHINES
Part 1: Frame numbers 56 to 400 and flange numbers 55 to 1080
1. Scope
This part of IEC 72 covers the majority of rotating electrical machines for industrial purposes
within the dimension range :
Foot-
mounted : — shaft-heights: 56 mm to 400 mm
Flange-
mounted : — pitch circle diameter of flange : 55 mm to 1080 mm
It gives tables of fixing dimensions, shaft extension dimensions and output powers. Maximum
permissible torques for continuous duty on a.c. motors are listed for various shaft diameters.
NOTE — The dimensions for machines with shaft heights 355 mm and 400 mm, given in this standard, are included among
the values given in IEC 72-2.
2. Letter-symbols for dimensions
The symbols defined below are illustrated by the dimensional sketches in clause 10.
A — distance between centre-lines of fixing holes (end view).
AA — width of the end of the foot (end view).
AB — over-all dimension across the feet (end view).
AC — diameter of the machine.
AD —
distance from the centre-line of the machine to extreme outside of the terminal box or other
most salient part mounted on the side of the machine.
B —
distance between the centre-lines of the fixing holes (side view).
BA — length of the foot (side view).
BB —
over-all dimension across the feet (side view).
C —
distance from the shoulder on the shaft at D-end to the centre-line of the mounting holes in
the nearest feet.
CA — distance from the shoulder on the shaft at N-end to the centre-line of the mounting holes in
the nearest feet.
D — diameter of the shaft extension at D-end.
DA —
diameter of the shaft extension at N-end.
E — length of the shaft extension from the shoulder at D-end.
EA — length of the shaft extension from the shoulder at N-end.
F — width of the keyway of the shaft extension at D-end.
FA — width of the keyway of the shaft extension at N-end.
G — distance from the bottom of the keyway to the opposite surface of the shaft extension
at D-end.
GA — distance from the top of the key to the opposite surface of the shaft extension at D-end.
GB — distance from the bottom of the keyway to the opposite surface of the shaft extension
at N-end.

---------------------- Page: 6 ----------------------

SIST IEC 60072-1:2001
72-1 © IEC — 9 —
GC — distance from the top of the key to the opposite surface of the shaft extension at N-end.
GD —
thickness of the key of the shaft extension at D-end.
GE — depth of the keyway at the crown of the shaft extension at D-end.
GF — thickness of the key of the shaft extension at N-end.
GH — depth of the keyway at the crown of the shaft extension at N-end.
H —
distance from the centre-line of the shaft to the bottom of the feet (basic dimension).
H' — distance from the centre-line of the shaft to the mounting surface — e.g. the bottom of the
feet in the feet-up version.
thickness of the feet.
HA —
HC — distance from the top of the horizontal machine to the bottom of the feet.
HD —
distance from the top of the lifting eye, the terminal box or other most salient part mounted
on the top of the machine to the bottom of the feet.
HE — distance from the mounting surface to the lowest part of the machine in the feet-up version.
K — diameter of the holes or width of the slots in the feet of the machine.
L — overall length of the machine with a single shaft extension.
LA — thickness of the flange.
LB — distance from the mounting surface of the flange to the end of the machine.
LC — overall length of the machine when there is a shaft extension at N-end.
M — pitch circle diameter of the fixing holes.
N —
diameter of the spigot.
P —
outside diameter of the flange, or in the case of a non-circular outline twice the maximum
radial dimension.
R — distance from the mounting surface of the flange to the shoulder on the shaft.
S — diameter of the fixing holes in the mounting flange or nominal diameter of thread.
T —
depth of the spigot.
NOTE — The definition of D-end and N-end of a machine is given in IEC 34-8.
3. Designation of machines
Foot-mounted machines may be designated by the frame number followed immediately by the
diameter of the shaft extension.
Examples: 112 M 28
Flange-mounted machines may be of three different designs:
—
Flange with free holes (clearances holes), denoted: FF flange;
—
Flange with tapped holes and with spigot diameter Nsmaller than the pitch circle diameter of the
fixing holes M, denoted: FT flange;
—Flange with tapped holes and with spigot diameter Ngreater than the pitch circle diameter of the
fixing holes M, denoted: FI flange.
These symbols shall form part of the respective flange numbers. Machines having only flange
mounting may be designated by the diameter of the shaft extension immediately followed by the
letters FF, FT or FI and the flange number.

Examples: with free holes: 28FF215

with tapped holes: 28 FT 165
or 28 FI 165 as applied

---------------------- Page: 7 ----------------------

SIST IEC 60072-1:2001
72-1 ©IEC — 11 —
When a foot-mounted machine is also provided with a flange at the drive end (D-end) the letters
FF, FT or FI and the flange number may be added immediately after the shaft diameter.
Examples: Flange with free holes: 112M28FF215
Flange with tapped holes: 112 M28 FT 165
or 112 M28 FI 165 as applied
4. Location of the terminal box
4.1 Machines with feet
The terminal box on a motor shall be situated with its centre-line within a sector ranging from the
top to 10° below the horizontal centre-line of the motor on the right-hand side, when looking at the
D-end of the motor. No recommendation is decided upon for generators.
It is recommended that unless the terminal box is on the top, motors be so constructed that the
terminal box may be located on the left-hand side by the manufacturer, if requested by the user at
the time when the motor is ordered.
NOTE — Provision should preferably be made so as to enable the cable entry to the terminal box to be in any one of four
directions at right angles.
4.2 Machines with flange onty
No recommendation.
5. Position of holes in the mounting flange
When a flange-mounted machine also has feet, the holes in the flange shall be spaced from the
diameter of the flange perpendicular to the mounting plane of the feet as follows.
45 ° for 4 holes
22,5 ° and 67,5 ° for 8 holes (see clause 10)
6. Fixing dimensions
6.1 Foot-mounted machines

---------------------- Page: 8 ----------------------

SIST IEC 60072-1:2001
72-1 © IEC - 13 -
Table 1 - Dimensions for machines with shaft-heights from 56 mm to 400 mm
K2)
H A B°) C
Bolt or
Frame
Nominal Tolerance3^
number '> Nominal Maximum
screw
deviation
mm µm µm
mm mm mm mm mm
+ 300 0 M5
56 M 56 - 0,5 90 71 36 5,8
7 + 360 0 M6
63 M 63 - 0,5 100 80 40
90 45 7 + 360 0 M6
71 M 71 - 0,5 112
100 50 10 + 360 0 M8
80 M 80 - 0,5 125
+ 0 M8
90 S 90 - 0,5 140 100 56 10 360
+ 360 0 M8
90 L 90 - 0,5 140 125 56 10
12 + 430 0 M10
100 S 100 - 0,5 160 112 63
63 12 + 430 0 M10
100 L 100 - 0,5 160 140
M10
112 S 112 - 0,5 190 114 70 12 + 430 0
0 M10
112 M 112 - 0,5 190 140 70 12 + 430
+ 0 M10
(112 L) 112 - 0,5 190 159 70 12 430
140 12 + 430 0 M10
132 S 132 - 0,5 216 89
12 + 430 0 M10
132 M 132 - 0,5 216 178 89
89 12 + 430 0 M10
(132 L) 132 - 0,5 216 203
- 0,5 254 178 108 14,5 + 430 0 M12
160 S 160
M12
- 0,5 254 210 108 14,5 + 430 0
160 M 160
+ 0 M12
160 L 160 - 0,5 254 254 108 14,5 430
14,5 + 430 0 M12
180 S 180 - 0,5 279 203 121
14,5 + 430 0 M12
180 M 180 - 0,5 279 241 121
279 121 14,5 + 430 0 M12
180 L 180 - 0,5 279
- 0,5 318 228 133 18,5 + 520 0 M16
200 S 200
M16
200 M 200 - 0,5 318 267 133 18,5 + 520 0
200 L 200 - 0,5 318 305 133 18,5 + 520 0 M16
+ 520 0 M16
225 S 225 - 0,5 356 286 149 18,5
149 18,5 + 520 0 M16
225 M 225 - 0,5 356 311
+ 520 0 M16
(225 L) 225 - 0,5 356 356 149 18,5
- 0,5 406 311 168 24 + 520 0 M20
250 S 250
M20
250 M 250 - 0,5 406 349 168 24 + 520 0
- 0,5 406 406 168 24 + 520 0 M20
(250 L) 250
+ 0 M20
280 S 280 - 1 457 368 190 24 520
24 + 520 0 M20
280 M 280 - 1 457 419 190
+ 520 0 M20
(280 L) 280 - 1 457 457 190 24
406 216 28 + 520 0 M24
315 S 315 - 1 508
508 457 216 28 + 520 0 M24
315 M 315 - 1
508 216 28 + 520 0 M24
(315 L) 315 - 1 508
+ 0 M24
355 S 355 - 1 610 500 254 28 520
M24
355 M 355 - 1 610 560 254 28 + 520 0
+ 0 M24
355 L 355 - 1 610 630 254 28 520
280 35 + 620 0 M30
400 S 400 - 1 686 560
35 + 620 0 M30
400 M 400 - 1 686 630 280
710 280 35 + 620 0 M30
400 L 400 - 1 686
Frame numbers within brackets should be regarded as non-preferred for a.c. induction machines.
1)
2)Open-ended slots are not permitted.
3) These tolerances are those given in coarses series H14 of ISO 2768.
4)Those dimensions are preferred-Additional recommended values for B dimension are given in table 2.

---------------------- Page: 9 ----------------------

SIST IEC 60072-1:2001
72-1 © IEC — 15 —
Table 2 — Recommended values for B dimension
Dimensions in millimetres
Frame number letter
Frame number
numeral
Z Y F ED
G C BA
56
45 50 56 63 71 80 90 100 112 125 140
63 50 56 63 71 80 90 100 112 125 140 160
71
56 63 71 80 90 100 112 125 140 160 180
80
63 71 80 90 100 112 125 140 160 180 200
90
71 80 90 100 112 125 140 160 180 200 224 250
100
80 90 100 112 125 140 160 180 200 224 250 280 315
112 125
80 90 100 114 140 159 180 200 224 250 280 315 355 400 450
132 100 112
125 140 160 178 203 224 250 280 315 355 400 450 500 560
160 112 125 140 160 200 210
178 254 280 315 355 400 450 500 560 630 710
180 125 140 160 180 203 224 241 279 315 400 450 710
355 500 560 630 800
200 140 160 180 200 228 250 267
305 355 400 450 500 560 630 710 800 900
225 160 180 200 224 250 286 311 356 400 450 500 560 630 710
800 900 1000
250 180 200 224 250 280 311 349 406 450 500 560 630 710 800 900 1000 1120
280 200 224 250 280 315 368 419 457 500 560 630 710 800 900 1000 1120 1250
315 224 250 280 315 355 406 457 508 560 630 710 800 900 1000 1120 1250 1400
355 280 315 355 400 450 500 560 630 710 800 900 1000 1120 1250 1400 1600 1800
400 315 355 400 450 500 560 630 710 800 900 1000 1120 1250 1400 1600 1800 2000
NOTES
1 Values printed in italics are repeated from table 1.
2 In special cases, instead of the above values, a value from the R 40 series may be retained.
In this case two adjacent letters of the above table are used, e.g. frame number 225 DC for B= 850 mm.

---------------------- Page: 10 ----------------------

SIST IEC 60072-1:2001
72-1 © IEC — 17 —
6.2 Flange-mounted machines
Machines having both feet and flange should preferably have
A, B and C dimensions selected
from table 1.
Table 3 — Dimensions for flanges with pitch circle diameters from 55 mm to 1080 mm.
Flange M N PZ) R S Tapped T
number Free holes (FF) holes Maximum
Number
(FT)3>
of
FF - FT
Nominal ISO tolerance Nominal ISO tolerance
holes
mm mm mm mm µm µm thread mm
µm mm mm
55 55 40 j6 + 11 — 5 70 0 4 5,8 H14 + 300 0 M5 2,5
65 65 50 j6 + 11 — 5 80 0 4 5,8 H14 + 300 0 M5 2,5
75 75 60 j6 + 12 — 7 90 0 4 5,8 H14 + 300 0 M5 2,5
85 85 70 j6 + 12 — 7 105 0 4 7 H14 + 360 0 M6 2,5
100 100 80 j6 + 12 — 7 120 0 4 7 H14 + 360 0 M6 3
115 115 95 j6 + 13 — 9 140 0 4 10 H14 + 360 0 M8 3
130 130 I10 j6 + 13 — 9 160 0 4 10 H14 + 360 0 M8 3,5
165 165 130 j6 + 14 — 11 200 0 4 12 H14 + 430 0 M10 3,5
215 215 180 j6 + 14 — 11 250 0 4 14,5 H14 + 430 0 M12 4
265 265 230 j6 + 16 — 13 300 0 4 14,5 H14 + 430 0 M12 4
300 300 250 j6 + 16 — 13 350 0 4 18,5 H14 + 520 0 M16 5
4
350 350 300 j6 + 16 — 16 400 0 18,5 H14 + 520 0 M16 5
400 400 350 j6 + 18 — 18 450 0 8 18,5 H14 + 520 0 M16 5
18,5
500 500 450 j6 + 20 — 20 550 0 8 H14 + 520 0 M16 5
600 600 550 js6 + 22 — 22 0 24 H14 +
660 8 520 0 M20 6
740 740 680 js6 + 25 — 25 800 0 8 24 H14 + 520 0 M20 6
940
940 880 js6 + 28 — 28 1000 0 8 28 H14 + 520 0 M24 6
1080 1080 1000 js6 + 1150 0 H14 + 520 0 M24 6
28 — 28 8 28
')
This table does not apply to FI flange.
2) The external outline of mounting flanges up to and including FF 300 and FT 300 may be other than circular. Dimension Pmay deviate from
that given in the table only on the minus side.
3)
For FT flange-mounted machines, it is recommended that the free holes in the mounting part should be as shown in column S for the
corresponding size of FF flange.

---------------------- Page: 11 ----------------------

SIST IEC 60072-1:2001
7. Shaft extension, keys and keyways dimensions. Greatest permissible torques on continuous duty for a.c. motors
Table 4
Greatest
Keyway GA
Key
Diameter E
permissible
(GC)
(EA)2)
D u
GE (GH)
F (FA) Nom- torque on
F (FA) GD (GF)
(DA)
continuous
inal 4)
Nom- Tolerance
Nom- Tolerance Tolerance
Nom- Tolerance duty for
Tolerance Nom- Tolerance
Nom-
final
final N93) P93)
h9 final a.c. motor 5)
final final
Desig-
Desig-
nation
nation
ISO
ISO
mm Nm
µm pm mm pm pm
µm mm µm pm
mm mm µm µm mm .tm
mm µm µm
0,25
-31 1,2 +100 0 7,8
2 -4 -29 - 6
2 0 -25 2 h9 0 - 25
7 j6 + 7 - 2 16
0,63
-31 1,8 +100 0 10,2
- 25 3 -4 -29 - 6
0 -25 3 h9 0
9 j6 + 7 - 2 20 3
1,25
-30 -12 -42 2,5 +100 0 12,5
0 - 30 4 0
23 4 0 -30 4 h9
11 j6 + 8 - 3
16 2,8
-12 -42 3 +100 0
0 - 30 5 0 -30
0 -30 5 h9
14 j6 + 8 - 3 30 5
18 4,1
-30 -12 -42 3 +100 0
h9 0 - 30 5 0
40 5 0 -30 5
16 j6 + 8 - 3
0 20,5 7,1
-30 -12 -42 3,5 +100
h9 0 - 30 6 0
+ 8 - 3 40 6 0 -30 6
18 j6
21,5 8,25
-30 -12 -42 3,5 +100 0
h9 0 - 30 6 0
40 6 0 -30 6
19 j6 + 9 - 4
0 24,5 14
-30 -12 -42 3,5 +100
0 - 30 6 0
+ 9 - 4 50 6 0 -30 6 h9
22 j6
0 27 18
-36 -15 -51 4 +200
h11 0 - 90 8 0
50 8 0 -36 7
24 j6 + 9 - 4
31,5
-51 4 +200 0 31
8 0 -36 -15
8 0 -36 7 hll 0 - 90
28 j6 + 9 - 4 60
50
-15 -51 5 +200 0 35
0 - 90 10 0 -36
0 -36 8 hll
32 k6 +18 + 2 80 10
90
-15 -51 5 +200 0 41
hll 0 - 90 10 0 -36
10 0 -36 8
38 k6 +18 + 2 80
125
-61 +200 0 45
12 0 -43 -18 5
-43 8 hll 0 - 90
k6 +18 + 2 110 12 0
42
200
-18 -61 5,5 +200 0 51,5
h11 0 - 90 14 0 -43
14 0 -43 9
48 k6 +18 + 2 110
355
-18 -61 6 +200 0 59
0 - 90 16 0 -43
+11 110 16 0 -43 10 hll
55 m6 +30
450
-18 -61 7 +200 0 64
0 -110 18 0 -43
0 -43 11 hll
60 m6 +30 +11 140 18
69 630
-18 -61 7 +200 0
-110 18 0 -43
18 0 -43 11 hll 0
65 m6 +30 +11 140
0 74,5 800
-22 -74 7,5 +200
hll 0 -110 20 0 -52
20 0 -52 12
70 m6 +30 +11 140
1000
-22 -74 7,5 +200 0 79,5
hll -110 20 0 -52
20 0 -52 12 0
75 m6 +30 +11 140
1250
-22 -74 9 +200 0 85
-110 22 0 -52
0 -52 14 hll 0
m6 +30 +11 170 22
80
1600
-22 -74 9 +200 0 90
0 -110 22 0 -52
22 0 -52 14 hll
m6 +35 +13 170
85
1900
-74 9 +200 0 95
25 0 -52 -22
14 hll 0 -110
+35 +13 170 25 0 -52
90 m6
2300
-74 9 +200 0 100
25 0 -52 -22
-52 14 hll 0 -110
m6 +35 +13 170 25 0
95
2800
10 +200 0 106
-110 28 0 -52 -22 -74
0 -52 16 hll 0
100 m6 +35 +13 210 28
4000
-74 10 +200 0 116
-110 28 0 -52 -22
16 hll 0
m6 +35 +13 210 28 0 -52
110
For diameters up to 25 mm, a shoulder of 0,5 mm is considered sufficient.
1)
In cases where the service conditions are well defined, shaft extensions might also be selected in accordance with existing ISO standards.
2)
The keyway tolerance N9 applies for normal keys and P9 for fitted keys.
3)
can be calculated from values of the other dimensions given in the table.
4) Tolerances for GA
The torque values are chosen from the R 40 series. In cases where the operating conditions are well defined, torque values might also be selected in accordance with existing ISO standards.
5)

---------------------- Page: 12 ----------------------

SIST IEC 60072-1:2001

—
72-1 © lEC 21 —
8. Tolerances for flange-mounted machines
8.1 Shaft extension run-out
Table 5
Shaft extension run-out
D
Normal class Precision class
(only on request)
mm µm µm
10 30 15
D <
35 18
10< D< 18
30 40 21
18 < D<
50 25
30 < D < 50
50 < D 80 60 30
<
80 < D 120 70 35
<

---------------------- Page: 13 ----------------------

SIST IEC 60072-1:2001
72-1 © IEC
— 23 —
8.2
Concentricity of spigot diameter and perpendicularity of mounting face of flange to shaft
Table 6
Flange number N P
Maximum permissible change
in indicator reading
FF - FT
Normal class Precision class
(only on request)
mm mm µm
µm
55 40 70
80 40
65 50 80 80
40
75 60
90 80 40
85 70 105 80 40
100 80 120 80 40
115 95 140 80 40
130 110
160 100 50
165 130
200 100 50
215 180
250 100 50
265 230 300 100 50
300 250 350 125
63
350 300 400 125 63
400
350 450 125 63
500
450 550 125 63
600
550 660 160 80
740 680 800 160 80
940 880 1000 200
100
1080 1000 1150 200 100
8.3 Methods of measurement
8.3.1
Shaft extension run-out
Apply the point of the indicator to the shaft, midway along its length. Read the maximum and
minimum values on the indicator through one slow revolution of the shaft. The difference between
the readings shall not exceed the value given in table 5.
i
Ei2
L.

---------------------- Page: 14 ----------------------

SIST IEC 60072-1:2001
72-1 ©IEC — 25 —
8.3.2 Concentricity of spigot and shaft
Fix the indicator rigidly on the shaft extension, by means of a device similar to that shown in the
figure, at a distance of about 10 mm from the mounting face of the flange. Read the maximum and
minimum values on the indicator through one slow revolution of the shaft.
The difference betwen the extreme readings of the concentricity test indicator shall not exceed
the values given in table 6.
It is recommended that the test be carried out on the machine set up with shaft vertical so as to
make the measurement free from the effect of gravity.
8.3.3 Perpendicularity of mounting face of flange to shaft
Fix the indicator rigidly on the shaft extension, by means of a device similar to that shown in the
figure, at a distance of about 10 mm from the mounting face of the flange. Read the maximum and
minimum values on the indicator through one slow revolution of the shaft.
The difference between the extreme readings of the perpendicularity indicator shall not exceed
the values given in table 6.
It is recommended that the test be carried out on the machine set up with shaft vertical so as to
eliminate the axial clearance in the bearing.
8.4 Tolerances for machines other than flange-mounted machines
The shaft extension run-out for machines other than flange-mounted machines shall not exceed
the value specified in table 5 when measured as specified in 8.3.1.

---------------------- Page: 15 ----------------------

SIST IEC 60072-1:2001
— 27 —
72-1 © IEC
9. Preferred rated output values
Table 7
In kW (motors) or kVA (generators)
kW (kVA)
Secondary series^^
Primary series
0,06
0,09
0,12
0,18
0,25
0,37
0,55
0,75
1,1
1,5
1,8
2,2
3
3,7
4
5,5
6,3
7,5
10
11
13
15
17
18,5
20
22
25
30
32
37
40
45
50
55
63
75
80
90
100
110
125
132
150
160
185
200
220
250
280
1) To be used as intermediate values only in cases of special need.

---------------------- Page: 16 ----------------------

SIST IEC 60072-1:2001
72-1 © IEC
— 29 —
Table 7 (continued)
kW (kVA)
Primary series Secondary series
300
315
335
355
375
400
425
450
475
500
530
560
600
630
670
710
750
800
850
900
950
1000

---------------------- Page: 17 ----------------------

SIST IEC 60072-1:2001
—31 —
72-1 © IEC
10. Dimensional sketches
10. Plans dimensionnels
—AD
... LC AC
-
r
r=—
HC HD
BA
_ K
— ^
I
E--.
C+^--B— .•■•t- CA --4■r-
EA-i^—
^---BB---001
AB
r L
LB
LA
----^
r
N D
FF
ou/or FT 1)
R
E
2)
080/77
U FF - accès par l'arrière. I )
FF - access to back.
FT - pas d'accès par l'arrière. FT - no access to back.
2) Ce symbole [SO indique le mode de projection utilisé. This (SO symbol indicates the projection method used.
2 )

---------------------- Page: 18 ----------------------

SIST IEC 60072-1:2001
72-1 © IEC —33
Annex A
Guide for the selection of dimensions
Introduction
This annex is a guide for the selection of dimensions and should be considered as a guide for
future designs. It has the status of a report and does not replace nor interfere with IEC 72-1 and 72-2
which apply within the strict limits of their scopes.
References planes and symbols for mounting dimensions of rotating electrical machines are
given in annex B.
General requirements on tolerances and limit values of these dimensions are given in annex C.
A.1 Scope
This guide for the selection of dimensions applies to rotating electrical machines within the field
covered by IEC 34-1.
This annex sets forth basic series and alternative series for some mounting dimensions.
In a specific machine document, when values are selected from either the basic series or the alter-
native series, the selected values have equal status.
NOTE — The letter symbols used in the former IEC 72 and 72A, now 72-1 and 72-2, are replaced in this annex by the
symbols used in annex B.
A.2 Mounting dimensions to assure interchangeability of machines
A.2.1 Foot-mounted machines
The mounting plane of the feet may be below, on or above the shaft centre line.
A.2.1.1 Dimensions H10 (shaft height)
A.2.1.1.1 Machines with the mounting plane of the feet below the lowest point of the frame (feet down) :
basic series for H10.
The basic series is taken from ISO 496-Series III. The series is open at both ends. It includes all the
values of the R 20 series.
A.2.1.1.2 Machines with the mounting plane of the feet below the lowest point of the frame (feet down) :
alternative series for H10.
The alternative series is taken from ISO 496-Series IV. The series is open at the lower end and
closed at the value 375.
It includes the values of the R 40 series which are not included in the R 20 series (the series known
as R 40/2) for example : 95, 106, 118, 132, 150, 170, 190.

---------------------- Page: 19 ----------------------

SIST IEC 60072-1:2001
72-1 ©IEC — 35 —
A.2.1.1.3 Machines with the mounting plane of the feet above the lowest point of the frame (feet up):
serie for H10.
The series is open at both ends. It includes all the values of the R 10 series plus the value zero.
A.2.1.2 Dimensions B10 and L10
(distances between centre lines of mounting holes)
A.2.1.2.1
Basic series
The basic series is the R 20 series, open at both ends.
A.2.1.2.2
Alternative series
The alternative series is the R 40/2 series, open at both ends. For a given value of H10 consecutive
values for dimension B10 shall be separated by at least one R 20 step.
A.2.1.3 Dimensions L11 and L16 (distances from the longitudinal reference plane to the centre line of the
nearest fixing hole in the feet)
The values are those of the R 40 series, open at both ends but values below 50 mm are rounded to
the R 40 series, e.g.: 45, 48, 50, 53, 56, 60, 63.
For larger machines (H > 400 mm) L11 and L16 values may be zero or measured from the centre
of the machine.
A.2.1.4 Dimensions Dll
(diameter of the fixing holes or width of the slots in the feet)
The values are taken from the coarse series in ISO 273-part III and are given below with the
corresponding thread sizes for mounting bolts:
2 2,6 3,1 3,6 4,8 5,8 7 10
M1,6 M2 M2,5 M3 M4 M5 M6 M8
12 14,5
18,5 24 28 35 42
48 56
M10 M12 M16 M20
M24 M30 M36 M42 M48
A.2.1.5
Rules for the choice of sets of dimensions for foot-mounted machines
A.2.1.5.1 Dimension HIO
(shaft height)
Values from the basic series should be used whenever suitable, but some values from the
alternative series may be introduced in a specific document.
A.2.1.5.2
Other dimensions in a specific document
Some values from the alternative series may be introduced.
A.2.2 Flange-mounted machines
A.2.2.1 Flange FF or FT type with spigot diameter D20 or D24 > 1000 mm

---------------------- Page: 20 ----------------------

SIST IEC 60072-1:2001
72-1 ©IEC — 37 —
A.2.2.1.1
Dimensions, number of holes and the fitting screw size and thread
The nominal values shown in table A.1 apply.
Flanges designated by FF followed by the nominal value of a pitch circle diameter D22 or D27
have clearance mounting holes of diameter D21 or D26.
Flanges designated by FT followed by the nominal value of D22 or D27 have mounting holes
tapped with the thread size in tab
...