1. MACHINE TOOL
Prof. kiran gore

2. Contents
Lathe machine
Drilling machine
Grinding machine

3. D R I L N G M A C H I N E

4. Drilling machine:-
Drilling is an operation through which holes are produced in solid material by using a revolving tool which is called as a drill & the machine used for producing a hole in the solid material is called as drilling machine.

5. BASIC ELEMENTS OF DRILLING MACHINE
The drilling machine consist of following principle parts:-
Base
Column
Work table
Drill head
Spindle drive

6. Drill head
Column
Spindle
Work table
BASE

7. Drive mechanism for drilling machine

8. TYPES OF DRILLING MACHINE
1) Portable drilling machine
2) Sensitive or bench drilling machine
3) Upright drilling machine
4) Radial drilling machine
5) Gang drilling machine

9. Portable drilling machine

10. 2) Sensitive or bench drilling machine:-
Drill holes from 1.5 to15mm

11. SENSITIVE
DRILLING
MACHINE

12. SENSITIVE
DRILLING
MACHINE

13. 3) Upright drilling machine:-
Drill holes up to 50mm
Table can move vertically and radially

14. Upright drilling machine

15. 4) Radial drilling machine
It the largest
and most
versatile used
for drilling
medium to
large and
heavy work
pieces.

18. Plain radial drilling machine Semi universal radial drilling machine
Based on the type & number of
movements possible the radial drilling
machine can be grouped as
Plain radial drilling machine
Semi universal radial drilling machine
universal radial drilling machine

19. 1.Plain radial drilling machine
In these type of machine three
principle movements are possible
Vertical movement of the arm along the column
Horizontal movement of the drill head along the column
Swinging movement of the arm in horizontal plane about the vertical column

20. 2.Semi universal radial drilling machine
In these type of machine in addition above three movements , the drill head can be swung about the horizontal axis which is normal to the arm.
This fourth movement of the drill head enables drilling of holes at desired inclination with the normal vertical position

21. 3.universal radial drilling machine
In these machine, the arm itself can be rotated through desired angle along the horizontal axis.
These is an addition to the four movement available on a semi-universal drilling machine.
All these five movements in universal machine enable it to drill on the work piece at any angle.

22. 5) Gang drilling machine

23. DRILLING MACHINE OPRATION
The different operations performed on the drilling are as
Drilling
Boring
Counter boring
Reaming
Counter sinking
Tapping

24. 1) Drilling
Drilling is the operation of producing a circular hole in a solid metal by using a revolving tool is called as drill. The drill is a multiple point cutting tool.

25. 2) Boring Boring is a process of enlarging a drilled hole by
using an adjustable cutting tool
called as boring tool.
The boring operation is used
to finish a drilled hole to
accurate size and to correct
the roundness of hole.

26. 3) Counter boring
The operation which is used for enlarging only limited portion of the hole is called as counter boring & the tool used for this purpose is called as counter bore.

27. 4) Reaming Reaming is an operation of finishing already drilled hole.
Material removal in reaming is negligible.
The tool used for reaming operation is called as a reamer.

28. 5) Counter sinking
Counter sinking operation is used for enlarging the end of the hole and give it a conical shape for a short length. The tool used for this operation is called a counter sink.

29. 6) Tapping
Tapping is the process of making threads in a drilled hole. The tool used for tapping is called a Tap.

30. Any Questions

31. THANK YOU