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information for citizens to secure access to information under the control of public aut
in order to promote transparency and accountability in the working of every public auand whereas the attached publication of the Bureau of Indian Standards is of particular
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I ndian St andard
POWER TRANSMISSION
BUSH TYPE FLEXIBLE COUPLING
( Second Rev i si on
Fist Reptint NOVEMBER 1991
UDC 621.825.7
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Transmission Devices Sectional Committee, LMD 10
FOREWORD
This Indian Standard (Second Revision) was adopted by the Bureau of Indian Standar
after the draft finalized by the Transmission Devices Sectional Committee had be
Light Mechanical Engineering Division Council.
This standard, originally published in 1964, had covered two types of flexible couplings,
and disc type. It was revised in 1980 and disc type coupling was deleted as it w
obsolete. This second revision incorporates the prevailing technical practices in the co
the following important changes have been made:
a) Two types of couplings have been included, namely, Type A with conical
with cylindrical bushes. Type A and Type B couplings also differ slightly in
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I ndian St andard
POWER TRANSMISSION
BUSH TYPE FLEXIBLE COUPLING
( Second Revi si on
1 SCOPE
This standard covers general requirements .of bush
type flexible couplings for power traosmission for
shaft diameters ranging from 15 to 290 mm.
NOTE-For the guidance of consumers, Annex A
recommending the data to be supplied while placing
order, and Annex B recommending methods of checking
the angular and parallel alignment of the coupling, have
been included.
1A ANGULAR B
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IS
2693:1989
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Table 1 General Plan of Bush Type Flexible Couplings
Chaes
5.1 and
7.5 )
l :.
Maximnm
*Load Rating
Speed in
per 100
rev/min
rev/mis kW
iE
5700
5 100
4500
0’368
0’441
0’736
1’18
1’84
: z
2.94
4’63
All dimensions in millimetres.
Bore Diameter
D
F Y
Min Max
::
22
25
::
40
45
-
I
Other Dimensions see Fi
A
B C
80
2
112
125
140
160 z
::
40
45
50
Type A
E F
18 2
z:
3’
Cz 3
28 3
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Is 2693:1989
d) Speed in revolution per minute of the shafts
A-2 It is recommended that the
which the coupling connects: information should be supplied
1) At which normal power is transmitted,
2) At which maximum power is transmitted,
A-2.1 Position of shafts to be
and
inclined, etc ) details of limitatio
3) Maximum speed; and
for assembling and dismantling
e) Dimensions of shafts to be connected:
and size of any holes require
(jacking screws ); details of flu
I) Actual diameters, or nominal diameters loads; ratios of gears; flywhe
with limits,
2) Length of shaft extension, and
subjected to braking, time take
and atmospheric conditions o
3) Sizes of keyways.
conditions.
ANNEX B
Not e Under Clause
1
1
NOTES ON METHOD OF CHECKING ANGULAR AND PARALLEL A
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Boreao of Indian Standards
BIS is a statutory institution established under the Bureau o/lndian Srandardr Act,
harmonious development of the activities of standsrdizxtion,
marking and quality
goods and attending.to connected matters in theacountry.
Copyright
BIS has the copyright of all its publications.
No pnrt of these publications msy
any form without the prior permission in writing of BIS.
This does not preclude
the course of implementing the standard, of necessary details,
such as symbols a
grade designations. Enquiries relating to copyright be addressed to the Director ( P
Revision of Indian Standards
Indian Standards are reviewed periodically and revised,
when necessary and ame
are issued from time to time.
Users of Indian Standards should ascertain t
possession of the latest amendments or edition.
Comments on this Indian Standa
to BIS giving the following reference :
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AMENDMENT NO. 1 Ali :liST 1996
TO
I’clgc, 2 cltrrrse 51 ) -- Sut~slilutc ltlc l~oilowilq; lor IlIe cxi:Jiug:
‘5.1 The design, dimnsions and load ratings ShillI Ix: as given ie Table 1 and
can be eilhcr Type A or Type B ( XC Fig. 2).’
( Ptrg~: 3, clt~/m 7.5, Note) -- Dctctc.