Drilling Machine

Mechanical -2 – C
Sardar Vallabhbhai Patel Institute of Technology,
Vasad
Sr.
No.
Name Enrollment No.
1 Aakash Singh 150410119112
2 Harsh Sirsat 150410119113
3 Vrund Thakkar 150410119116

 Introduction
 Working Principle
 Construction
 Specification For Portable Drilling
Machine
 Types Of Drilling Machine
 Operation Of Drilling Machine

 The drilling machine or drill press
is one of the most common and
useful machine employed in
industry for producing forming
and finishing holes in a work
piece. The unit essentially consists
of:
 1. A spindle which turns the tool
(called drill) which can be
advanced in the work piece either
automatically or by hand.
 2. A work table which holds the
work piece rigidly in position.

 The rotating edge of the drill
exerts a large force on the work
piece and the hole is generated.
The removal of metal in a drilling
operation is by shearing and
extrusion.
 Use:- Drilling machine is used to
drill blind and through holes in
work pieces.

 The machine has only a hand feed
mechanism for feeding the tool into
the work piece.
 This enables the operator to feel how
the drill is cutting and accordingly he
can control the down feed pressure.
 Sensitive drill presses are
manufactured in bench or floor
models, i.e., the base of machine
may be mounted on a bench or floor.
 The main operating parts of a
sensitive machine/drill press are
Base, Column, Table, and Drill Head.

 Bench Drilling Machine :- The simplest
type of sensitive drilling machine is
shown in figure. This is used for light
duty drilling work. This machine is
capable to drill hole up to 12.5mm
diameter
1. Motor :- An electric motor supplies the
required driving force to stepped
pulley.
2. Base :- Base is the bottom part of
machine in which the column is fitted
upright.
3. Feed handle :- Handle is provided to
feed the drill in to the work piece. A
rake and pinion mechanism is
provided to drive the chuck.

 4.Column:- Column is the main
cylindrical part of drill machine on which
the other components are mounted.
 5.Belt guard:- Belt guard is provided to
cover the belt and pulley drive
mechanism to minimize the hazard of
accident.
 6.Chuck:- Chuck is provided to hold the
drill of different sizes up to 6.5 mm. Drill
size of more than 6.5 mm are to be fitted
directly in the Morse taper of spindle
 7.Work Table:- Work pieces are
mounted and held in position by the
table. This table can be tilted for drilling
at an angle.

DESCRIPTION SPECIFIED
CAPACITY
•Drilling Capacity in Steel of 60
Kg/mm²Tensile Strength
•Tapping Capacity in Steel of 60
Kg/mm² Tensile Strength
50 mm(min.)
50 mm(min.)
SPINDLE
•Spindle feed traverse
•Spindle Morse Taper
•Spindle Ovality
350 mm(min.)
MT5/MT 6
0.005(max.)
SPINDLE SPEED AND FEEDS
•Spindle Speeds (Range)( Approx.)
•Number of Speed steps
•Feed range (Approx.)
•Number of feed steps
16 – 800 RPM
15(min.)
0.05 - 0.5 mm/rev
6(min.)

TRAVERSES
•Vertical Travel of Arm (Min)
•Range of Swing of Arm
•Traverse of column in bed
2400mm(min.)
0-360 Deg.
1200mm(min.)
DISTANCES
•Swing Radius of drilling spindle
•Farthest Distance of Spindle end
from floor when horizontal
drilling
•Lowest Distance of Spindle end
from floor when horizontal
drilling
2250 mm( min)
1420 mm( Max.)
2700mm( min)
300 mm ( max)

 Portable Drilling Machine
 Sensitive or Bench Drill
 Upright Drilling Machine(Single
Spindle)
 Upright Drilling Machine(Turret
Type)
 Radial Drilling Machine
 Multiple Spindle Drilling Machine
 Deep Hole Drilling Machine
 Gang Drilling Machine
 Horizontal Drilling Machine
 Automatic Drilling Machine

 It is a very small, compact and self
contained unit carrying a small
electric motor inside it.
 It is very commonly used for
drilling holes in such components
that cannot be transported to the
shop due to their size or weight or
where lack of space does not
permit their transportation to the
bigger type of drilling machine.
 In such cases, the operation is
performed on the site by means
of the portable electric drill.

 This type of drilling machine is
used for very light work.
 Its construction is very simple and
so is the operation .
 It consists of as shown in fig. of a
cast iron having a fixed table over
it.

 This machine is very useful
because of its wider range of
action.
 Its principal use is in drilling
holes on such work is difficult to
be handled frequently.
 With the use of this machine,
the tool is moved to the desired
position instead of moving the
work to bring the latter in
position for drilling.

 It is nothing but a type of multiple
spindle drilling machine, in which
the spindles are arranged in a
row.
 These spindles may be driven
either separately or collectively.
 This machine is very useful when
the nature of work is such that a
number of operations like drilling,
reaming, counter boring and
tapping, etc. are to be performed
in succession on it.

• Drilling
• Reaming
• Boring
• Counter Boring
• Counter Sinking
• Spot Facing
• Tapping

 Drilling :- It is the main operation
done on this machine. It is the
operation of producing a circular
hole in a solid metal by means of
a revolving tool called drill.
 Boring :- It is an operation used
for enlarging a hole to bring it to
the required size and have a
better finish.
 Counter sinking :- It is the
operation used for enlarging the
end of a hole to give it a conical
shape for a short distance.

• Reaming :- It is the operation of
finishing a hole to bring it to
accurate size and have a fine
surface finish . This operation is
performed by means of a multi
tooth tool called reamer.
• Counter boring :- This operation
is used for enlarging only a limited
portion of the hole is called
counter boring .
• Tapping:- It is the operation done
for forming internal threads by
means of the tool called tap.

Drilling Machine

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