Types Of Drilling Bits And Their Functions Pdf


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06.05.2021 at 08:17
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types of drilling bits and their functions pdf

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Before you can decide which type of drill bit to use for a particular job, you would want to first know their construction and recommended application. With this guide of drill bit types and their applications, you will always use the right drill bit for different applications. Before we get into the drill bit types, we need to understand which materials are used to make the drill bits. The most common materials used in the making of drill bits include the following. Other than the tough materials used in making the drill bits, they will also have special coatings to make them better.

20 Types of Drill Bits (And Their Uses)

In the last class, we had discussed the Milling Machine and its operations in a detailed way whereas, in today's article, we will discuss the concepts of Drilling Machin ing along with its parts, working principle advantages, disadvantages, and applications.

It is a machine which is used to drill the holes on the components or workpiece with the help of drill bits. The base is made up of Cast Iron which has the capability of high compressive strength , good wear resistance , and good absorbing capability i. It is exactly placed at the center of the base which can act as a support for rotating the Swivel table and holding the power transmission system. It is attached to the column which can hold the machine vice in the grips and thereby, the workpiece is fixed in the machine vice to carry out the drilling operation.

The Swivel table can move up and down by means of rotational motion and can be locked to the column by means of locking nut. It consists of motor, stepped pulley, V-belt, and the Spindle. The power transmission is explained in the working of the drilling machine. By the rotation of hand-wheel, the spindle moves up and down in the vertical direction in order to give the necessary amount of feed to the work.

Here, the rotational motion is converted into linear motion by means of a Rack and Pinion mechanism which was explained below. It is used to hold the workpiece. Generally, 3 jaw chuck is used for holding circular components and 4 jaw chuck is used for holding rectangular components. It is the major part of this machine and is used to remove the material in the form of holes from the surface of the workpiece.

When the power is given to the motor, the spindle rotates, and thereby the stepped pulley attached to it also rotates. On the other end, one more stepped pulley is attached and that is inverted to increase or decrease the speed of the rotational motion.

Now, a V-belt is placed in between the stepped pulleys so as to drive the power transmission. Here a V-belt is used instead of a flat belt, in order to increase the power efficiency. Now the drill bit also rotates which was placed in the chuck and which was in connection with the spindle.

As the Pulleys rotates, the spindle also rotates which can rotate the drill bit. Now, by the rotation of hand-wheel, the spindle moves up and down in the vertical direction in order to give the necessary amount of feed to the work and this drill bit is used to make the holes on the component placed in the machine vice. When the hand-wheel is rotated, it is converting the rotational motion to the linear motion by means of rack and pinion. The setup consists of Rack has fine grooves , Pinion, Chuck and the Drill bit.

The drill bit has placed in the chuck and the chuck is connected to rack and when the hand-wheel rotates, the Pinion is inserted in the grooves of Rack [shown in the below fig. Below is the list of drilling machines which are used in the industries for the production of the materials. A radial drilling machine is used to drill holes in the components but it is quite different from the general drilling machine. The radial drilling machine has an arm that can rotate in the given radius.

If the component is large and if it is not able to hold on the worktable, then the component has to be placed on the ground and by rotating radial arm, the operation is to be performed. It is used to drill holes of Medium size in the components. It is heavier and bigger than the Sensitive drilling machine. As the name indicates, these drilling machines have multiple spindles that are away from each other.

This machine is used, when you want to drill a large number of holes on a single workpiece or making holes on individual workpieces. These types of drilling machines are designed to drill deep holes in various components of automobiles such as connecting rods, Aircraft Landing Gear, Inside Bore of Hydraulic Cylinder, Fuel Injector Bodies, Oilfield Exploration Equipment, etc.

It has to make sure that the coolant has to be added during the removal of material from the components. Here in the case of a Sensitive drilling machine, when the operator gives the feeding of the tool into the workpiece, it allows the operator to 'feel' or 'sense' the cutting action of workpiece w.

The portable drilling machine works in the similar way of bench drilling machine, but the difference is, the portable drilling machine can be taken to the different workplaces along with you and that's the reason it is called as portable drilling machine. Whereas, the bench drilling machine can do various operations, but it can stand at one place and it is not movable w.

As the name indicates that it has a gang of drill heads with individual motors attached to the vertical column and does multiple operations at a time.

It generally consists of drill heads which are placed side by side which can do various operations like drilling, boring, reaming, tapping, etc. The operation of making holes on the surface of the workpiece by the use of drill bit is called Drilling Operation. The operation of enlarging an existing hole is called the Boring Operation. The existing hole was created by the drilling operation. The operation of sizing and finishing an existing hole with the help of a reamer is called Reaming Operation.

It is the operation of creating internal threads by means of a cutting tool called Tap and the operation is called Tapping Operation.

This is an operation of removing the chips from the surface of the hole such that proper seating of bolts takes place and this removal can be done through end mill cutter using a drilling machine.

Without drilling, a Trepanning operation is used for producing a large-size hole of more than 50mm in diameter. This Trepanning operation cannot be used for blind holes. In this operation, the tool will rotate and reciprocate about its axis for producing very smooth holes.

The Countersinking operation is used to enlarge the end of the hole to give it a conical shape for a shorter distance. Let's know about the Advantages and Disadvantages of the Drilling Machine along with its applications. These are the different types of Drilling machines.

Let's find its Advantages, disadvantages and applications in a detailed way. Your email address will not be published. Notify me when new comments are added. So let's get started. Definition of Shaper Machine: Shaper Machine is used to…. Radial Drilling Machine. Upright drilling machine. Photo Courtesy:IndiaMart. Multiple Spindle Drilling Machine. Deep hole drilling Machine.

Gang Drilling Machine. Photo Courtesy: Indiamart. Leave a Reply Cancel reply Your email address will not be published. The related posts above were algorithmically generated, thanks to Contextual Related Posts.

Types of Drill Bits

Thank you so much for sharing. Your content was very helpful. You are a marvelous writer. Good work! This sort of article is fascinating and enjoyable to peruse. I cherish perusing and I am continually hunting down useful data like this. Good post however I was wondering if you could write a litte more on this subject?


For a typical drill bit, the angle of the point helps determine what type of material the allows you to use a single bit to drill holes with different.


Drill Bit Types and Their Applications

It is majorly deployed in the rotary drilling method to produce the hole in the fields. There are various types of drill bits of different shapes and sizes. These are used by the industry to remove materials in order to create holes. The drill bits technology has improved over a period of time and increased in terms of types.

With dozens of drill bit types and thousands of sizes to choose from we'll explain the differences and help you choose the right drill bit for your application. On our web site we have divided these into two categories:. We have only organized them in this fashion to make selection easier.

TerrAdapt bit adjusts to downhole conditions autonomously to enable smoother, faster drilling and extend tool life. This Smart News Release features multimedia. This expands the smooth drilling window and allows operators to achieve faster, more consistent ROP while reducing costs and NPT related to tool failures. Photo: Business Wire.

Different Types of Drill Bits: How Are They Easing Drilling Operations?

The first thing in any drilling assembly is the bit. This chapter will help the DD gain the knowledge necessary to make intelligent recommendations regarding bit selection.

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