29 Questions
What is the main purpose of a drilling machine in a workshop?
To produce cylindrical holes of required diameter and depth on metal workpieces
Which part of a drilling machine is responsible for holding the cutting tool?
Spindle
What is the function of the base in a drilling machine?
To rest the entire machine on a bench, pedestal, or floor
How is a mark made at the required location before drilling?
By pressing with a centre punch
What part of a drilling machine can be moved up and down on the column?
Table
What drives the spindle at different speeds in a drilling machine?
Electric motor
What type of belt is used to transmit power from the electric motor to the spindle in drilling machines?
'V' belt
Which type of drilling machine is best suited for carrying and using anywhere in the workshop?
Portable drilling machine
What is the main reason for naming the sensitive drilling machine 'sensitive'?
It requires hand feed for drilling
Which part of the sensitive drilling machine is made of cast iron to withstand vibrations?
Base
What feature distinguishes an upright drilling machine from a sensitive drilling machine?
Power feed arrangement
How does the radial drilling machine differ from the sensitive and upright drilling machines?
It has a heavier column
What is a characteristic feature of gang drilling machines?
Multiple spindles for simultaneous drilling
What is the purpose of a countersink?
To enlarge the top of the holes conically
Which part of a tap helps in cutting threads on the inside of a hole?
Flutes cut across the threads
What is the purpose of the tang in a twist drill?
To fit into a slot in the spindle
How do the lips and faces work on the point of a twist drill?
They form the cutting edges on the point
What role do the flutes play in a twist drill?
Escaping chips and allowing cutting fluid
Which part determines the length and inclination angle of the lips on a twist drill?
Flank and face intersection
What is the purpose of a gang drilling machine?
Drilling multiple holes in a workpiece simultaneously
What type of tool is a reamer?
A cutting tool for enlarging machined holes
What does a deep hole drilling machine specialize in?
Drilling deeper holes in barrels and spindles
Why should the workpiece not be held by hand while drilling?
To avoid injuries to the operator
What is the main advantage of using a counter bore?
It has multiple cutting teeth for better finishing
Which tool is used specifically for originating a hole in a solid material?
Drill
In a multiple spindle drilling machine, how are all the spindles driven?
By a single motor using a set of gears
What is essential to use while drilling on a deep hole drilling machine?
Coolant during the process
T - bolts and clamps, V - block, and Angle plate are examples of:
Work holding devices in a drilling machine
What are the factors considered to specify a drilling machine?
Size of the largest workpiece it can center under the spindle
Learn about the importance of drilling machines in workshops and how they are designed to produce cylindrical holes on metal workpieces. Explore the introduction and types of boring machines and how they are used for similar operations.
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