The document discusses excavators, including their production cycle, history, types (crawler, wheel), attachments, uses, and features. It notes that excavator production cycle is measured by how quickly it can load its bucket, swing, dump material, and dig again. The first excavators appeared in the late 1700s/early 1800s and evolved over time, with Yanmar launching the first zero tail swing excavator in 1993. Excavators are used for digging, material handling, demolition and other construction and mining tasks.

1. EXCAVATORS
by ILA VAMSI KRISHNA

3. PRODUCTION CYCLE
1.PERFORMANCE OF EXCAVATOR CAN BE
MEASURED FROM THE PRODUCTION CYCLE.
2.IT IS THE TIME THAT AN EXCAVATOR TOOK TO LOAD
THE BUCKET FROM SOURCE,SWING,DUMP,RETURN
BACK AND DIG AGAIN.
3.THEREFORE, FASTER THE OPERATION SPEED, THE
FASTER WILL BE THE ONE COMPLETE CYCLE AND
HENCE PRODUCTION CYCLE WILL INCREASE

4. HISTORY
1.FIRST APPEARED IN LATE 1700’S/EARLY 1800’S
2.IN 1990 HAD A LONG CONVENTIONAL COUNTER
WEIGHT ON REAR END

5. 3.IN 1993,YANMAR LAUNCHED THE WORLD
FIRST ZERO TAIL SWING EXCAVATOR

6. CRAWLER EXCAVATOR
Crawler excavator runs on two endless tracks
(chain wheel system). These types of excavators
are used in hilly areas where risks of sliding of
machinery are on the verge. Crawler type
excavator has low ground pressure because of
spreading of load on large area. Therefore, it is
also used where soil support is weak.
WHEEL EXCAVATOR
Wheel excavator runs on wheels and are used for
excavation and loading of dump trucks and
most of the time it is only used for plain ground
operations. Because of wheel, it is not suitable
for hilly areas due to low grip value to the
ground.

7. VARIOUS KIND OF EXCAVATORS
1.COMPACT EXCAVATORS
2.CRAWLER EXCAVATORS
3.DRAGLINE EXCAVATORS
4.LONG REACH EXCAVATORS
5.A SUCTION EXCAVATORS

13. EXCAVATOR ATTACHMENTS
BACK HOE BUCKET
LOADER BUCKET

14. MULTI GRAPPLE
BOTTOM DUMP BUCKET

15. SCISSORS
ROCK DRILLS

16. USES OF EXCAVATORS
Usage
Excavators are used in many ways:
Digging of trenches, holes, foundation
Material handling
Brush cutting with hydraulic attachments
Forestry work
forestry mulching
demolition
General grading/landscaping
Mining, especially, but not only open-pit mining
River Dredging
Driving piles, in conjunction with a pile driver
Drilling shafts for footings and rock drilling

18. 1. Bucyrus RH400
Weights almost 889 tonnes
 The world’s biggest hydraulic excavator is
currently owned by Caterpillar, but was
originally launched by Terex, in Germany, in
1997.

19. HYDRAULIC EXCAVATOR FEATURES
1.LEAST PRODUCTION CYCLE
2.LESS NOISY
3.SMOOTHNESS AND EASE OF OPERATION
4.HIGH OVERALL EFFICIENCY
5.GREATER ACCURACY AND PRECISION

20. THANK YOU
ILA VAMSI KRISHNA