The document explains the concept of coupling, a device used to connect two shafts for power transmission, detailing various types such as rigid and flexible couplings. Rigid couplings include sleeve or muff, split muff, and flange couplings, while flexible couplings consist of bush pin type, Oldham's, and universal couplings, each with specific designs and applications to accommodate misalignment and vibrations. The information is supported by references from mechanical engineering literature.

1. TYPES OF
COUPLING

2. Content
• What is coupling?
• Types of Coupling
1)Rigid Coupling
(A)Sleeve or Muff Coupling
(B)Clamp or Split muff or compression
coupling
(C)Flange Coupling
<1> Unprotected Type
<2> Protected Type

3. 2)Flexible Coupling
(A)Bushed pin type flange coupling
(B)Universal Coupling
(C)Oldham’s Coupling

5. What is coupling?
• A coupling is a
device used to
connect two shafts
together at their
ends for the
purpose of
transmitting power.

6. • It is used to
connect two shafts
which are perfectly
in axial alignment.
These couplings do
not allow any
relative rotation
between the two
shafts.

7. Types of Rigid coupling
1)Sleeve or Muff Coupling
2)Clamp or Split Muff or
Compression Coupling
3)Flange Coupling
(a) Unprotected type
(b) Protected type

8. Sleeve or Muff Coupling
• This is the simplest form
of rigid coupling. It is
made up of cast iron
and very simple to
design and
manufacture. It consists
of hollow cylinder(muff)
whose inner diameter is
same as diameter of
shaft as shown in figure.

9. Split Muff Coupling
• In this coupling, the
muff or sleeve is made
into two halves parts
of cast iron and they
are joined together by
means of mild steel
studs or bolts and nuts
as shown in figure.

10. Flange Coupling
1) Unprotected Type
Flange Coupling:
This coupling is having two
separate cast iron flanges
as shown in figure an
unprotected type flange
coupling. Each flange is
mounted on the shafts end
and keyed to it. The two
flanges are coupled
together by help of bolts and
nuts.

11. The projected portion
of one of the flange
and corresponding
recess on other
flange are help to
bring the shafts into
line and maintain
alignment

12. 2) Protected type flange
coupling:
a flange is provided with
shroud which shelters the
bolt heads and nuts as
shown in figure is called
protected type flange
coupling. This coupling
prevents catching clothes of
workman.

13. • This coupling is used to
protect the driving and
driven machine members
against harmful effects
produce due to
misalignment of shafts,
vibration, sudden shock
load or shaft expansion.

14. Types of Flexible
Coupling
1)Bush pin type flange
coupling
2)Oldham’s coupling
3)Universal coupling or
Hooke’s joint

15. Bush Pin Type Coupling
• This is the modified form of
flange coupling. This type f
coupling has a pins and it work
as a coupling bolts. The rubber
or leather bushes are used over
the pins. The coupling is having
two halves are dissimilar in
construction as shown in figure.
The pins are rigidly fastened by
nuts to one of the flange and
kept loose in the other flange.

16. • This coupling is used to
connect the small parallel
misalignment and axial
displacement. In this
coupling rubber bush
absorbs shock and
vibration during its
operation. This type of
coupling is mostly used to
couple an electric motor
and machine.

17. Oldham’s Coupling
• It consists of two flanges with
slots and a central floating disc
as shown in figure. The disc
having two tongues at right
angles. The one tongue is fitted
into the slot of first flange and
allows horizontal sliding relative
motion with the other tongue is
fitted into the slot of the second
flange and allows for vertical
sliding relative motion.

18. • This right angle motions of
tongues on the slots will
accommodate lateral
misalignment of shafts
when they rotate.
• Oldham’s coupling is used
in connecting two parallel
shafts but not in
alignment, and their axis
are at small distance
apart.

19. Universal Coupling
• Universal coupling consists
of two similar forks keyed
on the ends of the two
shafts as shown in the
figure. These two forks are
assembled to a central
block by pin. A central block
having two arms at right
angle to each other.
Universal coupling is used
to connect two shafts
whose axis intersect.

20. • Universal coupling is also
used to connect two
shafts, where the angle
between two shaft may be
varied when they rotate.
The universal coupling is
widely used in automobile
and machine tools.

21. References
ElementsOf Mechanical Engineering
By-
H. G. Katariya
J. P. Hadiya
S. M. Bhatt
Books IndiaPublications

22. Prepared By
Shethpreetsanketkumar
M. E. 3, batch - c
170050119548