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                     Radial Drilling 
Machine
What Is the 
Radial Drilling Machine?
Radial drilling machines are used to 
drill mediums to large and heavy work 
pieces. The purpose of these devices is 
to drill holes at specific radial 
distances. It is primarily utilized when a 
component has a large height.
The main purpose of 
radial drilling machines is to drill holes 
in large or heavy objects. Since heavy 
work cannot be moved very far, the 
radial drilling machine is designed to 
be able to move any component of 
heavy work without exerting a lot of 
effort.
Parts of 
Radial Drilling Machine:
1. Base
This is the bottommost part of the radial drilling machine. It is made of 
cast iron because cast iron has high corrosive strength. The base is 
used to support the assembly of parts on it. It also absorbs vibrations 
and shocks induced by machine parts.
2. Column
There is a column at one end of the base. It is a vertical column that 
acts as a support to rotate the radial arm in 360 degrees.
3. Table
It is placed above the column. It is provided with a slot to mount the 
work piece directly to its face. It is usually round or rectangular in 
shape.
4. Radial Arm
This is the part that is attached to the column. This part can rotate 360  
degrees around the column. The face of the radial arm is accurately 
machined, and the head slides over it. This arm moves up and down the 
column. In larger machines, hydraulics are used to move the arm up and 
down.
5. Drill Head
The drill head is mounted on the radial arm and drives the drill spindle.
It engages all mechanisms to drive and feed the drill at different speeds.
6. Spindle
It is a part of the drilling machine that carries the equipment of the drilling 
machine and is responsible for its rotation.
7. Motor
The motor is present at the top of the drill head, which drives the 
horizontal axis.
8. Chuck
Chick is present below the axis. It is used to hold the drill bit in its 
place.
9. Tool or Drill Bit
Drill bits are used to drill holes in the work piece. This is the part that 
rotates and enters the work piece, creating holes.
Working of Radial Drilling 
Machine
• When the operator turns on the motor, it 
starts spinning. 
• With the help of a gear or pulley drive, the 
power of the motor is transmitted to the 
spindle. 
• There is a medium-size control wheel on the 
right-hand side of the drill head. By using 
this wheel, the operator starts applying a 
slow-pressor on the job which is pre-located 
below the drill bit.
• Due to the pressure, the excess material 
starts coming out of the work piece and a 
hole starts to form inside the job.
Types of Radial Drill Machine
Plain Radial Drilling Machine
Semi-Universal Radial Drilling 
Machine
Universal Radial Drilling Machine
All Geared Radial Drilling Machine
Double Column Radial Drilling 
Machine
Automatic Radial Drilling Machine
CNC Radial Drilling Machine
Heavy Duty Radial Drilling 
Machine
Small Radial Drilling Machine
Applications of Radial Drilling Machine
Here, the different Applications of radial drilling machines are as follows
 The basic application of a drilling machine is to make holes of various shapes and 
sizes on any work piece.
 There are many types of drill machines available in the market for performing various 
operations. Hand drills are used for screwing and fastening.
 Hammer drills are used by carpenters to drill and fix wooden parts. Where power 
supply is not available, a cordless drill is useful.
 Milling cum drilling machines are broadly adopted in industries were mixing and 
grinding of solids and liquids are required.
 Pillar drill machines (also referred to as drill presses) are used in commercial 
applications where bulk production of drilled materials in various shapes and sizes is 
required, such as drill metal sheets, plastic, wood, glass, etc.
 The capacity of the press depends on it. Several factors, namely column diameter, 
spindle nose, spindle travel, spindle speed, and electronic motor used in the machine.
Advantages of 
Radial Drilling Machine
The Advantages of Radial Drilling Machine are as follows.
 Radial Drilling Machine is advanced compared to the Bench Drilling machine.
 With the help of its radial arm, it can able to drill holes on the components 
which are larger than the space between the drill bit and the worktable.
 Works efficiently on different metals and wood materials too.
 The worktable can be rotated through 360 degrees.
 It exhibits High Precision and Accuracy.
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