INTRODUCTION TO GEARS AND GEAR TRAINS Definition of gear Task of gear Types of Gear Trains TYPES OF GEARS Definition of gears Gearing up down mechanism Driver and driven Speed ratio and train value

2. Name : Abdullah Al Mahfuj.
Department : Textile.
Program : B Sc in Textile Engineering
ID : 142014007
Green University of Bangladesh .

3. Name of My Presentation

4. LETS START WITH MY
JOURNEY....
• Definition of gear
• Task of gear
INTRODUCTION TO
GEARS AND GEAR
TRAINS
• TYPES OF GEARS
• Definition of gearsTypes of Gear Trains
• Driver and driven
• Speed ratio and train value
Gearing up down
mechanism

5. WHAT ARE GEARS???
• A toothed well that engage with another
toothed while or with a rack .
In order to change the speed or direction of
trans motion motion

6. Task of gear
Gear can transfer rotation to different axis
Gear can reverse the direction or rotation
It can change Speed

7. And Gear Trains???
Sometimes, two or more gears are made to
mesh with each other to transmit power from
one shaft to another. Such a combination is
called gear train or train of toothed wheels.

8. Types of Gear Trains
I. Simple gear train.
II. Compound gear train
III. Reverted gear train
IV. Epicycle gear train

9. Types of Gear
1. Spurs gear
2. Helical gear
3. Bevel gear
4. Worm gear

10. Gearing up and down mechanisms
Gearing up mechanism:
N1/N2=T1/T2
Gearing down mechanism:
N2/N1=T2/T1
N1= speed of driver
N2=speed of driven
T1= teeth no of driver
T2= teeth no of driven

11. Speed ratio and Train value
Speed ratio = N1/N2=T1/T2
Train value = N2/N1=T2/T1
Let ,
N1= speed of driver
N2=speed of driven
T1= teeth no of driver
T2= teeth no of driven