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IS 2223
Transcript of IS 2223
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BIS 2003
B U R E A U O F I N D I A N S T A N D A R D S
MANAKBHAVAN, 9BAHADURSHAHZAFARMARGNEWDELHI110002
IS : 2223 1983
(Reaffirmed 2000)
Edition 3.2
(1993-01)
Price Group 5
Indian StandardDIMENSIONS OF FLANGE MOUNTED
AC INDUCTION MOTORS
( Second Revision )
(Incorporating Amendment Nos. 1 & 2)
UDC 621.313.333.025 : 006.78
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BIS 2003
BUREAU OF INDIAN STANDARDS
This publication is protected under the Indian Copyright Act (XIV of 1957) andreproduction in whole or in part by any means except with written permission of the
publisher shall be deemed to be an infringement of copyright under the said Act.
Indian Standard
DIMENSIONS OF FLANGE MOUNTEDAC INDUCTION MOTORS
( Second Revision )
Rotating Machinery Sectional Committee, ETDC 15
Chairman Representing
SHRI S. G. RAMACHANDRA Indian Electrical Manufacturers Association,Bombay
Members
DR G. M. PHADKE ( Alternate toShri S. G. Ramachandra )
SHRI R. S. ARORA Directorate General of Supplies & Disposals,New Delhi
SHRI K. L GARG ( Alternate )
SHRI P. R. BAPAT Guest, Keen, Williams Ltd, Bombay
SHRI A. S. ABHYANKAR ( Alternate )
CHIEF ENGINEER (E), II Central Public Works Department, New Delhi
SURVEYOROF WORKS II ( Alternate )
DIRECTOR (H. E. D. 1) Central Electricity Authority, New Delhi
DEPUTYDIRECTOR (H. E. D. 1)( Alternate )
SHRI S. R. DORAISWAMY Army Headquarters, Ministry of Defence
SHRI VIDYABHUSHAN ( Alternate )
SHRI G. L. DUA Rural Electrification Corporation Ltd, New Delhi
SHRI S. K. SETHI ( Alternate )
SHRI M. GANESH Kirloskar Electric Co Ltd, Bangalore
SHRI N. A. JANARDAN RAO( Alternate I )
SHRI K. V. MANJUNATH( Alternate II )
SHRI A. GANGULI Steel Authority of India Ltd (Bhilai Steel Plant),New Delhi
SHRI K. NARAYANAN ( Alternate )
JOINT DIRECTOR STANDARDS(ELECT)-TML
Railway Board, Ministry of Railways
ASSISTANT DIRECTOR (ELECT)( Alternate )
( Continued on page 2 )
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( Continued from page 1 )
( Continued on page 20 )
Members Representing
SHRI A. P. LAD Walchandnagar Industries Ltd, Walchandnagar
SHRI A. G. DOSHI ( Alternate )
SHRI Y. C. LUMBA The General Electric Co of India Ltd, Calcutta
SHRI P. MAJUMDAR ( Alternate )
SHRI P. MUKHOPADHYAY National Test House, Calcutta
SHRI SANATH KUMAR ( Alternate )
SHRI J. M. NAIK Millowners Association, Bombay
SHRI S. SARUP ( Alternate )
SHRI SHIV NARAYAN Bharat Heavy Electricals Ltd, Hyderabad
SHRI S. C. MUKHOPADHYAY( Alternate I )
SHRI S. S. RAO ( Alternate II)
SHRI J. S. NEGI Jyoti Ltd, VadodaraSHRI P. L. PRADHAN ( Alternate )
DR M. S. PADBIDRI Hindustan Brown Boveri Ltd, Vadodara
SHRI N. SUNDARARAJAN ( Alternate )
SHRI V. RAMASWAMY Siemens India Ltd, Bombay
SHRI S. N. GHOSH ( Alternate )
SHRI RAMESH CHANDRA Delhi Electric Supply Undertaking, New Delhi
SHRI SATCHIDANAND ( Alternate )
SHRI A. D. RANGNEKAR Tata Consulting Engineers, Bombay
SHRI M. E. REDDY( Alternate )
LT-COL A. K. SRIVASTAVA Directorate of Standardization, Ministry of
Defence (DGI)MAJ K. S. SETHI ( Alternate )
SHRI A. N. SRIVATHSA NGEF Ltd, Bangalore
SHRI S. L. SRIDHARAMURTHY( Alternate )
SHRI R. K. TASKAR Crompton Greaves Ltd, Bombay
SHRI D. P. PATEL ( Alternate )
SHRI J. M. UDIA Directorate General of Technical Development,New Delhi
SHRI J. S. ZAVERI Bharat Bijlee Ltd, Bombay
SHRI S. G. DESHMUKH ( Alternate )
SHRI S. P. SACHDEV, Director General, ISI ( Ex-officio Member )Director ( Elec tech )
Secretary
SHRI R. K. MONGA
Senior Deputy Director (Elec tech), ISI
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Indian Standard
DIMENSIONS OF FLANGE MOUNTED
AC INDUCTION MOTORS
( Second Revision )
0. F O R E W O R D
0.1 This Indian Standard (Second Revision) was adopted by the IndianStandards Institution on 20 October 1983, after the draft finalized by
the Rotating Machinery Sectional Committee had been approved bythe Elcctrotechnical Division Council.
0.2 This standard was first issued in 1962 and covered the mountingflanges for frame sizes from 90 to 280 specified in IS : 1231-1962. Itwas revised in 1971 to include mounting flanges for motors equivalentto those having shaft-heights from 56 to 315 mm covered in theIS : 1231-1967*. These dimensions had been adopted from theinternational publications of the IEC. In the first revision the majormodifications carried out related to:
a) shaft runouts, concentricity and perpendicularity of flanges, and
b) standardization of three types of flanges covering a wide range ofapplications.
In this second revision, B-type flanges of large size frame numbersabove 315 mm ( see 1231-1971* and IS : 8223-1976 ) have beenincluded ( see Tables 2 and 3 ). The provision of tapped holes for B-typeflanges has been made in Table 2. C-type flanges have now beenrecommended up to 132 frame number of IS : 1231-1974*.
0.3 The flanges specified in this standard may also be used onfoot-mounted motors in which case requirements of IS : 1231-1974*,IS : 8223-1976 and IS : 996-1979, governing the dimensions offoot-mounted motors shall apply.
0.4 D-type flanges are not recommended for motors below framenumber 132 of IS : 1231-1974*.
*Dimensions of three-phase foot-mounted induction motors.Dimensions and output ratings for foot-mounted electrical machines with frame
numbers 355 to 1 000.
Specification for single-phase small ac and universal electric motors ( second revision ).
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0.5 The designation and dimensions of flanges for vertical shaft motorsfor pumps are covered separately in IS : 2254-1965*.
0.6 The general requirements of ac induction motors which may haveflange mountings are covered separately in the following standards:
0.7 In the preparation of this standard, assistance has been derivedfrom ICE Publication 72 (1971) Dimensions and output ratings forrotating electrical machines Frame numbers 58 to 400 and flangeFF 55 to FF 1 000 and FT 55 to FT 1 080: Part 2 Dimensions ofmounting flanges issued by the International ElectrotechnicalCommission (IEC).
0.8 This edition 3.2 incorporates Amendment No. 1 (January 1990)and Amendment No. 2 (January 1993). Side bar indicates modificationof the text as the result of incorporation of the amendments.
0.9 For the purpose of deciding whether a particular requirement ofthis standard is complied with, the final value, observed or calculated,expressing the result of a test, shall be rounded off in accordance withIS : 2-1960. The number of significant places retained in the roundedoff value should be the same as that of the specified value in thisstandard.
1. SCOPE
1.1 This standard covers the dimensional requirements for flangemounted motors having enclosures given in IS : 4691-1968 and shaftheights 56 mm to 315 mm specified in IS : 996-1979 and IS : 1231-1974|| with their shaft either in horizontal or vertical position.
*Dimensions of vertical shaft motors for pumps ( revised ).
IS : 325-1978 Specification for three-phase induction motors( fourth revision )
IS : 996-1979 Specification for single-phase small ac and universalelectric motors ( second revision )
IS : 6381-1972 Specification for construction and testing ofelectrical apparatus with type of protection e
IS : 7538-1975 Specification for three-phase squirrel cage inductormotors for centrifugal pumps for agriculture
applicationIS : 8289-1976 Specification for electrical equipment with type of
protection n
Rules for rounding off numerical values ( revised ).Degrees of protection provided by enclosure for rotating electrical machinery.
Specification for single-phase small ac and universal electric motors ( second revision ).||Dimensions of three phase foot-mounted induction motors ( third revision ).
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1.2 This standard also covers dimensions of large flanges of motorswith flange numbers between 355 and 1 080 given in IS : 8223-1976*with their shaft either in horizontal or vertical position.
2. LETTER SYMBOLS2.1 For the purpose of this standard, the following letter symbols shallapply ( see Fig. 1, 2, 3 and 4 ).
*Dimensions and output ratings for foot-mounted electrical machines with framenumbers 355 to 1 000.
AC diameter of motor
AD distance from the axial centre line of the motor to extremeoutside part of terminal box or other most salient objectmounted on the side of motor
D diameter of shaft extension
DA diameter of second shaft extensionE length of shaft extension from the shoulder
EA length of the second shaft extension from the shoulder
e shaft runout
f concentricity of mounting spigot
g perpendicularity of the mounting spigot
F width of keyway
FA width of keyway of second shaft
G distance from the bottom of the keyway to the oppositesurface of the shaft extension
GA distance from top of the key to the opposite surface of theshaft extension
GB distance from bottom of the keyway to the opposite surface ofthe second shaft extension
GC distance from the top of the key to the opposite surface ofsecond shaft extension
GD thickness of key
GE depth of keyway at the crown of the shaftGF thickness of the key of the second shaft extension
GH depth of the keyway of the crown of second shaft extension
L overall length of motor with single shaft extension
LA thickness of flange
LB distance from mounting surface of flange to the end of motor
LC overall length of motor when there is a second shaftextension
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NOTE Symbols are standardized to facilitate reference when ordering motors tothis standard. The ringed symbols in Fig. 1 to 4 refer to dimensions which arespecified in this standard.
3. DESIGNATION OF FLANGE MOUNTED MOTORS
3.1 Three types of mounting flanges are recognised in Table 1 whichare designated as type B, C and D type.
3.2 The flange numbers in Tables 2 to 5 correspond to the pitch circle
diameter of the fixing holes in millimetres. The letter F is added toindicate that the motor is flange-mounted. Example: F115B.
3.3 Motors manufactured in accordance with Tables 2 to 5 should carrya mark on the rating plate which includes the frame number and theflange number taken from these tables. Example: 132-F400D.
4. STANDARD FRAME SIZES, DIMENSIONS AND OUTPUTRATINGS
4.1 The fixing dimensions for the different flange numbers covered bythis standard shall be as follows:
a) Table 2 and Table 3 for B-type flanges ( see Fig. 1 and 4 ).
b) Table 4 for C-type flanges ( see Fig. 2 and 4 ).
c) Table 5 for D-type flanges ( see Fig. 3 and 4 ).
4.2 Shaft extension dimensions and their association with ratedoutputs for different class of insulations shall be in accordance withIS : 996-1979* and IS : 1231-1974.
LD gap for fixing holes in the flange
M pitch circle diameter of the fixing holes
N1 diameter of the mounting spigot
N2 diameter of the mounting rabbetNOTE a) Spigot portion refers to the male part of the flange fitting.
b) Rabbet portion refers to the female part of the flange fitting.
P outside diameter of the flange or in the case of a non-circularoutline, the maximum diametral dimension
R distance from mounting surface of flange to the shoulder onshaft
S diameter of clearances (fixing) holes in mounting flange ornominal diameter of thread
T depth of spigot
*Specification for single-phase small ac and universal electric motors ( second revision ).Dimensions of three-phase foot-mounted induction motors ( third revision ).
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4.3 The accuracies of shaft extension runout, concentricity of mountingspigot and perpendicularity of mounting face to shaft shall be inaccordance with 7. The methods of determination of these accuracies
shall as specified in 8.
TABLE 1 DESIGNATION OF TYPES OF FLANGES
( Clause 3.1 )
SL
NO.
DESIGNATIONOF
FLANGESYMBOL ILLUSTRATION
(1) (2) (3) (4)
i) Flange mounted motor withmounting flange near drive-endbearing
B
ii) Face mounted motor withmounting face on drive-end andshield
C
iii) Flange mounted motor withmounting flange near drive-endof frame
D
NOTE 1 All motors shall have free shaft extension.
NOTE 2 The illustrations given above show the motors having their shafts inhorizontal position. However, the same flange designation shall apply to motorshaving their shaft in vertical position.
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FIG. 1 MOTORSWITH B-TYPE FLANGE
FIG. 2 MOTORSWITH C-TYPE FLANGE
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FIG. 3 MOTORSWITH D-TYPE FLANGE
FIG. 4 SHAFT EXTENSION DETAILS
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5. POSITION OF TERMINAL BOX
5.1 When flange mounted motors also have feet, the location of theterminal box shall be as specified in IS : 996-1979* and IS : 1231-1974.
5.2 The terminal box on flange mounted motors without feet shall beon the right hand side, when viewed from shaft, with fixing holesposition at 45 (22.5 for 8 holes) with respect to vertical plans.
5.2.1 Unless otherwise specified, tolerance on the angle ( see Fig. 5 )45 for 4 holes, 22.5 for 8 holes and 15 for 12 hole flange shall be 0.5.
6. POSITION OF FIXING HOLES ON FLANGE IN RELATIONTO EYE BOLT OR FEET
6.1 When, flange mounted motors also have feet the position of the
holes in a four-hole flange should have an angle of 45 with respect tothe plane which passes through the shaft and is perpendicular to themounting plane of the feet ( see Fig. 5 ). For the eight and twelve holeflange, the corresponding angle should be 22.5 and 15, respectively.
7. ACCURACIES OF SHAFT EXTENSION RUNOUT ( e ),CONCENTRICITY OF SPIGOT ( f) AND PERPENDICULARITYOF MOUNTING FACE TO SHAFT ( g)
7.0 Two classes of accuracies are specified namely, Normal andPrecision. Unless otherwise specified, only normal accuracies shall be
applied.7.1 Shaft Extension Runout The tolerance on shaft extensionrunout shall be as given in Table 6.
7.2 Concentricity of Spigot Diameter and Perpendicularity ofMounting Face of Flange to Shaft Concentricity of mountingrabbet (spigot) diameter and tolerances of perpendicularity ofsupporting face of flange in relation to the shaft of the motor shall beas given in Table 7.
*Specification for single-phase small ac and universal electric motors ( secondrevision ).Dimensions of three-phase foot-mounted induction motors ( third revision ).
FIG. 5 POSITIONOF HOLESIN FOUR-HOLE FLANGE
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TABLE 2 FRAME NUMBER AND DIMENSION OF MOTORS WITH B-TYPE FLA
( Clauses 3.2, 3.3, 4.1; Figs. 1 and 4 )
FLANGENUMBER
FRAME NUMBER* M N P R NUMBEROF
HOLESDegree of Prot-ection IP 44 orSuperior Methodof Cooling IC 41
Degree of Protec-tion IP 21, IP 22and IP 23 andMethod ofCooling IC 01
Nomi-nal
Tole-rance
Nomi-nal
Tolerance Nomi-nal
FreTo
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) (14)
mm mm mm m m mm mm mm m
F 115 B
F 130 B
F 165 B
F 215 B
F 265 B
F 300 B
F 350 B
F 400 BF 500 B
F 600 B
F 740 B
F 940 B
56 and 63
71
80 and 90
100 and 112
132
160 and 180
200
225250 and 280
315
355
400 and 450
56 and 63
71
80 and 90
100 and 112
132
160 and 180
200225
250 and 280
315
400
115
130
165
215
265
300
350
400500
600
740
940
0.3
0.3
0.3
0.3
0.3
0.5
0.5
0.5 0.5
1.0
1.0
1.0
95
110
130
180
230
250
300
350450
550
680
880
j6
j6
j6
j6
j6
j6
j6
j6j6
js6
js6
js6
+ 13
+ 13
+ 14
+ 14
+ 16
+ 16
+ 16
+ 18+ 20
+ 22
+ 25
+ 28
9
9
11
11
13
13
16
18 20
22
25
28
140
160
200
250
300
350
400
450550
660
800
1 000
0
0
0
0
0
0
0
00
0
0
0
4
4
4
4
4
4
4
88
8
8
8
10
10
12
15
15
19
19
1919
24
24
28
+ 360
+ 360
+ 430
+ 430
+ 430
+ 520
+ 520
+ 520+ 520
+ 520
+ 520
+ 520
NOTE The dimension LA refers to the flange thickness at the place where the stud is fixed. In other places, the flange thickness canused. This dimension is given for guidance.
*Frame number same as in IS : 996-1979 Specification for single-phase small ac and universal electric motors ( second revision )and foot-mounted induction motors ( third revision ).
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As in the Original Standard, this Page is
Intentionally Left Blank
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TABLE 3 DIMENSIONS OF B-TYPE FLANGE FOR LARGE FRAMENUMBER MOTORS*
( Clauses 3.2, 3.3, and 4.1 and Fig. 1 and 4 )
FLANGENUMBER
DIMENSIONS
M N P S T LA
Drilledhole size
No.
(1) (2) (3) (4) (5) (6) (7) (8)
mm mm mm mm mm mm
F 1 080 B
F 1 180 BF 1 2 5 0 B F 1 320 BF 1 4 0 0 B F 1 500 BF 1 700 BF 1 900 BF 2 0 0 0 B F 2 120 BF 2 360 B
1 080
1 1801 2501 3201 4001 5001 7001 9002 0002 1202 360
seeNote 1
1 150
1 2501 3201 4001 4801 6001 8002 0002 1202 2402 250
28
28282828282835383535
8
8 or 1688 or 168
12 or 2412 or 2412 or 241212 or 2416 or 32
seeNote 1
seeNote 2
NOTE 1 The dimensions Nand Tin Table 3 are not specified because these are notnormally required for large machines. Special requirements, if any, may be agreedbetween the manufacturer and the user.
NOTE 2 The thickness of flange LA in Table 3, may be selected suitably dependingon the type of construction.
*The details in this table are applicable to flange mounted motors of VI design withshaft downward.
These flange numbers have been retained for the purpose of continuity and are notpreferred.
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TABLE 4 FRAME NUMBER AND DIMENSIONS OF MOTORS WITH SMALL
( Clauses 3.2, 3.3, and 4.1, and Figs. 2 and 4 )
FLANGE
NUMBER
FRAME*
NUMBER
M N P S
Size Tolerance Size Tolerance Threadedsize
(1) (2) (3) (4) (5) (6) (7) (8)
mm mm mm mm
F 6 5 C
F 7 5 C
F 8 5 C
F 100 C
F 115 C
F 130 C
F 130 C
F 165 C
56
63
71
80
90
100
112
132
65
75
85
100
115
130
130
165
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
50
60
70
80
95
110
110
200
j6
j6
j6
j6
j6
j6
j6
j6
80
90
105
120
140
160
160
160
M5
M5
M6
M6
M8
M8
M8
M12
*Frame numbers same as in IS : 996-1979 Specification for single-phase small ac an( second revision ) and IS : 1231-1974 Dimensions of three-phase foot-mounted induction mot
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TABLE 5 FRAME NUMBER AND DIMENSIONS OF MOTORS WITH D
( Clauses 3.2, 3.3, 4.2 and Figs. 3 and 4 )
FLANGE
NUMBER
FRAME*
NUMBER
M N P R S DI
Size Tolerance Size Tolerance DrilledSize
(1) (2) (3) (4) (5) (6) (7) (8) (9)
mm mm mm mm mm mm
F 400 D
F 400 D
F 500 D
F 500 D
F 600 DF 600 D
F 740 D
F 740 D
132
160
180
200
225250
280
315
400
400
500
500
600600
740
740
0.5
0.5
0.5
0.5
1.0 1.0
1.0
1.0
350
350
450
450
550550
680
680
j6
j6
j6
j6
js6js6
js6
js6
450
450
550
550
660660
800
800
71
90
103
115
127146
168
194
19
19
19
19
2424
24
24
*Frame numbers same as in IS : 1231-1974 Dimensions of three-phase foot-mounted induction
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TABLE 6 ACCURACIES OF SHAFT EXTENSION RUNOUT (e)
( Clauses 4.3, 7.1, 8.1; and Fig. 7 and Fig 9 )
DIAMETEROF SHAFTEXTENSION
SHAFT EXTENSION RUNOUT ( e )
Normal Class Precision Class(1) (2) (3)
mm m m
Up to and including 10 30 15
OverOverOverOverOverOverOver
10 up to and including18 up to and including30 up to and including50 up to and including80 up to and including
120 up to and including140 up to and including
18305080
120140160
35405060708090
18212530354050
NOTE For downward shaft mounting machines and having larger shaft diametresthe values of accuracy of shaft extension runout are recommended in Fig. 9.
TABLE 7 ACCURACIES OF CONCENTRICITY (f) ANDPERPENDICULARITY (g)
( Clauses 4.3, 7.2, 8.2, 8.3 and Fig. 7, 8 and 9 )
FLANGENUMBER
SPIGOTDIAN1
MAXIMUM PERMISSIBLECHANGEIN INDICATOR
READING CONCENTRICITY( f)
OUTSIDEDIA,P
PERPENDICULARITY( g)
NormalClass
PrecisionClass
NormalClass
PrecisionClass
(1) (2) (3) (4) (5) (6) (7)
mm m m mm mm m
FFFFFFF
657585
100115130165
5060708095
110130
8080808080
100100
40404040405050
8090
105120140160200
8080808080
100100
40404040405050
FFFFFFFFFF
215265300350400500600740940
1 080
180230250300350450550680880
1 000
100100125125125125160160200200
5050636363638080
100100
250300350400450550660800
1 0001 150
100100125125125125160160200200
5050636363638080
100100
NOTE The values of concentricity ( f) and perpendicularity ( g) are also illustratedin Fig. 9. In the case of large flanges these accuracies may be calculated byextrapolation from Fig. 9.
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8. METHODS OF MEASUREMENT
8.1 Shaft Extension Runout To measure the shaft extensionrunout with rotation of shaft, apply the point of the indicator on the
shaft midway along its length as shown in Fig. 6. Read the maximumand minimum values on the indicator through one slow revolution ofthe shaft, the difference between the readings ( e ) shall not exceed thepermissible tolerances given in Table 6.
8.2 Concentricity of Mounting Rabbet (Spigot) and Shaft Tomeasure the concentricity of spigot and shaft, fix the indicator rigidlyon the shaft extension by means of a device similar to that in Fig. 7 ata distance of about 10 mm from the mounting face of the flange. Readthe maximum and minimum values through one slow revolution of theshaft. The difference between the extreme readings of the test indicatorshall not exceed the values for concentricity ( f ) given in Table 7.
FIG. 6 MEASUREMENTOF SHAFT EXTENSION RUN-OUT ( e )
FIG. 7 MEASUREMENTOF CONCENTRICITYOF MOUNTING RABBET(SPIGOT)AND SHAFT ( f)
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8.2.1 In the case of large machines with tilting pad type or bush typejournal bearings the method of measuring spigot runout and facerunout shall be agreed between the manufacturer and the user.
8.2.2 It is recommended that test in 8.2 be carried out on the machinesset up with shaft vertical so as to make the measurements free fromeffects of gravity.
8.3 Perpendicularity of Mounting Face of Flange to Shaft Fixthe indicators rigidly on the shaft extension by means of a devicesimilar to that shown in Fig. 8 at a distance of about 10 mm from themounting face of the flange. Read the maximum and minimum valuesthrough one slow revolution of the shaft. The difference between theextreme readings of the perpendicularity indicator shall not exceed the
values ( g) given in Table 7.
8.3.1 It is recommended that the test should be carried out on motorset with shaft vertical so as to eliminate axial clearance in bearing.
FIG. 8 MEASUREMENTOF PERPENDICULARITYOF MOUNTING FACEOFFLANGEAND SHAFT ( g)
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FIG. 9 ACCURACIESOF SHAFTAND MOUNTING FACE
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( Continued from page 2 )
Industrial Motors Subcommittee, ETDC 15 : 1
Convener Representing SHRI S. N. GHOSH Siemens India Ltd, Bombay
MembersSHRI V. RAMASWAMY( Alternate to
Shri S. N. Ghosh )SHRI R. K. AGGARWAL Bharat Heavy Electricals Ltd, Hyderabad
SHRI D. BASU ( Alternate I )SHRI P. V. SATHE ( Alternate II )
SHRI J. C. CHHABRA Directorate General of Supplies & Disposals,New Delhi
DEPUTYDIRECTOROF INSPECTION( Alternate )
SHRI S. G. DESHMUKH Bharat Bijlee, Ltd, Bombay
SHRI S. P. DEGHE ( Alternate )SHRI G. DORAIRAJ The Coimbatore District Small Scale Industries
Association, CoimbatoreSHRI C. P. DUSAD Crompton Greaves Ltd, Bombay
SHRI A. V. WAGLE ( Alternate )SHRI M. GANESH Kirloskar Electric Co Ltd, Bangalore
SHRI M. R. PURANDARE ( Alternate )SHRI A. K. GHOSH Steel Authority of India Ltd (Rourkela Steel Plant),
New DelhiSHRI N. SUBRAMANIAN ( Alternate )
SHRI H. G. KAMATH Voltas Ltd, BombaySHRI M. L. KOTHARI Indian Jute Mills Association, Calcutta
SHRI A. P. LAD Walchandnagar Industries Ltd, WalchandnagarSHRI S. S. KULKARNI ( Alternate )
SHRI Y. C. LUMBA The General Electric Co of India Ltd, CalcuttaSHRI P. MAZUMDAR ( Alternate )
SHRI K. S. MINHAS Indian Machine Tool Manufacturers Association,Bombay
SHRI B. MUKHOPADHYAY National Test House, CalcuttaSHRI D. N. UPADHYAYA( Alternate )
SHRI J. M. NAIK Millowners Association, BombaySHRI V. K. D. PAI All India Electric Motor Manufacturers Association,
BombaySHRI KIRAN N. SHAH ( Alternate )
DR M. S. PADBIDRI Hindustan Brown Boveri Ltd, VadodaraSHRI N. SUNDARARAJAN ( Alternate )
DR G. M. PHADKE Indian Electrical Manufacturers Association, BombaySHRI J. R. MAHAJAN ( Alternate )
SHRI P. L. PRADHAN Jyoti Ltd, VadodaraSHRI A. B. CHOUDHARI ( Alternate )
SHRI M. RANGASHAI Hindustan Machine Tools Ltd, BangaloreSHRI NIRMALANAIK( Alternate )
SHRI A. N. SRIVATHSA NGEF Ltd, BangaloreSHRI S. A. WAJID ( Alternate )
SHRI T. SOMASUNDARAM Directorate of Industries & Commerce, Government
of Tamil Nadu, MadrasSHRI M. RAJAGOPALAN ( Alternate )
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Bureau of Indian Standards
BIS is a statutory institution established under theBureau of Indian Standards Act, 1986 to promoteharmonious development of the activities of standardization, marking and quality certification ofgoods and attending to connected matters in the country.
Copyright
BIS has the copyright of all its publications. No part of these publications may be reproduced in anyform without the prior permission in writing of BIS. This does not preclude the free use, in the courseof implementing the standard, of necessary details, such as symbols and sizes, type or gradedesignations. Enquiries relating to copyright be addressed to the Director (Publications), BIS.
Review of Indian Standards
Amendments are issued to standards as the need arises on the basis of comments. Standards are alsoreviewed periodically; a standard along with amendments is reaffirmed when such review indicatesthat no changes are needed; if the review indicates that changes are needed, it is taken up forrevision. Users of Indian Standards should ascertain that they are in possession of the latestamendments or edition by referring to the latest issue of BIS Catalogue and Standards : Monthly
Additions.
This Indian Standard has been developed by Technical Committee : ETDC 15
Amendments Issued Since Publication
Amend No. Date of Issue
Amd. No. 1 January 1990
Amd. No. 2 January 1993
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