This presentation gives complete information about the clutch of motor bike that how does it works. What components make a prefect clutch.

1. Clutch of Motor Bike
Muhammad Umair Akram
B.E [Industrial & Manufacturing Engineering] (in progress)
NEDUET, Karachi, Pakistan

2. What is a clutch?
 The mechanical device that engages or disengages the driving shaft from the
driven shaft.
 device that is used to transmit the power is clutch.

3. Clutch made up of?
 The clutch is not a single element in actual it is the assembly of the different
elements having their own functionality and these assembled part together
produces the functional clutch. The elements/parts of the clutch are:
1. Clutch outer
2. Clutch center
3. Lifter
4. Pressure plate
5. Friction disk/Disk friction
6. Clutch plates
7. Springs
8. Spring dampers
9. Set rings
10. Clutch cable & lever

4. Clutch made up of? [Continued]
 Clutch Outer:
 This side of the clutch is connected with the driving shaft i.e. to the transmission box. All
the other elements will be assembled in it from other side.
 Clutch Center:
 For CD-70 this element is named as drive plate and for other heavy bike this element is
named as clutch center. It has the inner hole broached means it have teethes on inner
hole which is directly connected with to the engine.
 Clutch plates & friction disks:
 There are two types of clutch plates one is disk friction plates and other one is steel
plate.
 Disk friction plate have the teeth at its outer diameter. These friction plates are coated
with some material most of the time it is ceramic.
 clutch disk plate have the teeth at its inside diameter that are used to make connection
with the clutch center which is connected with drive shaft.
 Pressure plate:
 It is the moving part of the clutch assembly which works against clutch spring tension. It
releases the clamping action on the clutch plates when the clutch lever is engaged.

5. Drive Plate
Pressure Plate
Clutch outer (outer side) Clutch outer (inner side)

6. Clutch disk plates
Friction disk plates

7. Clutch made up of? [Continued]
Video -1

8. Clutch made up of? [Continued]
 Springs:
 It is the element that is causing principle of clutch to be performed. Generally there are
in total four spring used. These springs use their tension power for the frim engaging of
the clutch with driving shaft. And uses it compression to be disengaged.
 Clutch lever & Cable:
 The steel cable is used for connecting the lever with the clutch assembly. Usually this
lever is attached on the left side of the handle of bike.
 Set ring:
 It is actually the lock ring that is used to lock down the all the plates in the clutch outer.

9. How the clutch works?
Video -2

10. Types of clutches:
 There are following type of clutches:
1. Wet clutch
2. Dry clutch
3. Centrifugal clutch
4. Cone clutch
5. Torque limiter
6. Non slip clutches

11. 1. Wet clutch:
 As the name indicates in this type of clutch the oil is circulated in its assembly i.e. the
whole clutch is packed with engine assembly and oil is used for lubrication. Generally
tacking almost all the bikes uses this type of clutches.
2. Dry clutch:
 This is the one which is kept away from the oil. And this clutch assembly is outside of the
engine case. The connecting points are sealed so that there is no chance for oil to get in
to it.
3. Centrifugal clutch:
 It is used where the speed of engine defines the position/behavior of clutch.
4. Cone clutch:
 As the name implies, a cone clutch has conical friction surfaces.
5. Torque limiter:
 Also known as a slip clutch or safety clutch, this device allows a rotating shaft to slip
when higher than normal resistance is encountered on a machine.
Types of clutches[Continued]

12. 1. Mechanical actuation:
 It is the simplest mode, and mechanically actuated clutches. Can be actuated through
hand or foot-operated linkages or cables, which provide a "feel" for the amount of
engagement.
2. Pneumatic Actuation:
 Frequently encountered in industrial equipment. Air-actuated clutches transmit as much
as 50,000 hp on machines such as rolling mills, grinding mills, and coilers. Air actuation
also is common on vehicles large enough to accommodate an air compressor.
3. Electrical clutches:
 Electric methods to engage input and output shafts without direct mechanical connection.
4. Hydraulic Clutches:
 These clutches deliver higher torque per unit volume than any other clutch. With this high
capacity, hydraulically actuated clutches can be used on almost any size equipment from
fans and blowers to construction and mining machines, where they are used most often.
Other Applications are…..