11 Common Difference Between Drilling and Boring

Hello, friends today we are going to discuss what is difference between drilling and boring operations.

Drilling and boring both are machining operation which is done by the drilling machine.

In our previous chapter on drilling machines we have already discussed both the operation drilling and boring, but here only will get to know about the differences.

So without wasting time let's get started to know the difference between drilling and boring.

What is Drilling?

Drilling is the process of removing material from a workpiece so that a hole can be created.

What is Boring?

Boring is a process of enlarging a hole that has already been created by another process such as drilling or casting.

difference between drilling and boring
Drilling Vs Boring

What is Difference between Drilling and Boring?

There are following 11 common difference between drilling and boring.

Drilling Boring
The drilling operation is done through the drilling machine to generate a hole. Boring operation is performed to enlarge the diameter of the existing hole that means it is always performed after drilling.
The cutting tool used for drilling in a drilling operation is known as a drill bit. The cutting tool used for boring operations is known as the boring bar.  A boring bar basically is a heavy metal bar with tools attached to the end.
The drill can extend the length of the hole and its diameter is limited by the drill diameter. Boring can increase the diameter of the existing hole.
The holes produced by drilling operations are generally cylindrical in shape and circular in diameter. However, some specialized drill bits can form shapes other than cylindrical such as a conical shape. Since the boring process is similar to internal turning hence also taper holes can be easily made by boring.
Drilling is the first step for hole machining.  However, sometimes centralization is done before drilling.  Boring cannot be done if there is no drilled hole or hollow part.  
The drill is meant to plunge effectively into the workpiece. So the axial length of the hole can be increased by the drilling operation.
Plunging is not possible with a boring tool.  Therefore the length of the hole cannot be increased by boring. 
The drill is a multi-point cutter. This means that the drill has two or more cutting edges that can simultaneously remove the material. The boring bar is a single-point cutter, so it has only one main cutting edge that removes material from the workpiece.
Tool rating speed is very high in the drilling operations. Tool rating speed is very low in boring operations.
The material removal rate is very high in drilling. The material removal rate is low in boring operations as compared to drilling.
The hole diameter is limited to the drill diameter, in fact, they are exactly the same. Boring is done only to increase the diameter of the hole.
During drilling operations, the hole surface finish is not good. During boring operation hole surface finish is good as compared to drilling.


So friends in this topic we have to know what is difference between drilling and boring.

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