This Presentation helps you to properly understand that what is Cotter Joint, Knuckle Joint & Lever and these all with best videos.

1. GANDHINAGAR INSTITUTE
OF TECHNOLOGY
Mechanical Department
B.E Sem. 4[C]
Machine Design & Industrial Drafting
Eccentric Loading
Cotter & Knuckle Joint
Lever
Presented By :
•Nirav Patel (130120119160) Neel Patel (130120119157)
•Nishant Patel (130120119162) Ravi Patel (130120119167)

2. Contents
 Cotter Joint
 Knuckle Joint
 Design & analysis of Lever
 Cranked

3. Cotter joint

4. Cotter Joint

5. TENSION FAILURE
SHEAR FAILURE
F
F
BEARING FAILURE
Cotter joint

6. Knuckle Joint

7. Knuckle joint
Two or more rods subjected
to tensile and compressive
forces are fastened together
Their axes are not in
alignments but meet in a
point
The joint allows a small
angular moment of one rod
relative to another
It can be easily connected
and disconnected
Applications: Elevator
chains, valve rods, etc

8. Knuckle joint

9. Lever

10. LEVER
Levers are one of basic tools that were probably used in
prehistoric times. It is assumed that in ancient Egypt, constructors
used the lever to move and uplift obelisks weighing more than 100
tons.
Lever is a simple machine that makes work easier to use; it
involves moving a load around a pivot using a minimum force.
A lever amplifies an input force to provide a greater output
force,which is said to provide leverage.
The levers are used to lift heavy weight with least amount of
effort.

11. Parts of a Lever System
A. Lever E. Effort Arm
B. Fulcrum H. Resistance ArmF. Effort Force
C. Resistance Distance
D. Resistance Force
G. Effort Distance
Entire board
C
D
H
G
F
B
A
E

12. EFFORT
FULCRUM
RESISTANCE
FIRST CLASS LEVER
A first-class lever is a lever in which the fulcrum is located in between the
input effort and the output load.

13. EFFORT
RESISTANCE
FULCRUM
SECOND CLASS LEVER
A second-class lever is a lever in which the resistance is located in between the
input effort and the fulcrum.

14. EFFORT
RESISTANCE
FULCRUM
THIRD CLASS LEVER
A third-class lever is a lever in which the effort is located in between the input
resistance and the fulcrum.

15. F
E
R
THIRD CLASS
LEVER
E
F
R
FIRST CLASS
LEVER
ER
F SECOND CLASS
LEVER

16.  Mechanical AdvantageMechanical Advantage is the ratio between the load and
effort.
 Mechanical AdvantageMechanical Advantage deals only with forces.
 Mechanical Advantage > 1> 1 means that the output force will
be greater than the input force.
(But the input distance will need to be greater than the output
distance.)
 First and Second class levers have a positive
mechanical advantage.
 Third class levers have a mechanical disadvantagedisadvantage,,
meaning you use more force that the force of the load
you lift.

17. THANK YOU