Different Types of Drill Bits and Their Uses

For so many reasons we need to make a hole on various types of products and there are various ways, you will find to make a hole. Your target should not be just to make a hole by hook or by crook. It is a foolish decision.

So, your target should be making the hole with less trouble and without damaging the material and obviously in a perfect way so that you can do the subsequent operation smoothly. And drill bit is the most popular tool for drilling.

You may need to drill holes of different shapes, size and on different types of materials. Depending on the various need of customers the drill bit manufacturers have manufactured different types of drill bits.

selection of wood drills and masonry

To pick up the right one for your work it is very necessary to be introduced with different types of drill bits so that you can understand which one you need.

Different Types of Commonly Used Drill Bits

Drill bits can be categorized in many ways. For example –it can be categorized on the basis of

  • shape
  • manufacturing material
  • the material on which you are going to work with it

We will show all of these categories so that you can get your required information easily from a single place and your time can be saved.

Category 1: Drill Bits of Different Shape

  1. Twist

Twisted drill bits have a pointy end with a spiral groove that helps to bring chaff out of the hole. They are available in different sizes including from a fraction of a millimeter up to multiple inches.

They are found good for drilling hole in most of the material and they are cheap also. When the drill bits become dull you can sharpen them using drill bit sharpener.

  1. Auger

Auger drill bits have similarity with both the twisted drill bits. Compared to twisted drill bits flute of auger drill bits is longer.

auger wood drilling bit for big holes

For drilling, soft materials auger shaped drill bits are very popular. You can make both medium size and deep holes with them easily. The Auger drill bit is traditionally used with a hand brace but today we use versions designed for power drills. Ideally, they prefer to be driven at low speed but high torque.

  1. Flat, Paddle or Spade

Spade or paddle bits have a flat bottom with a sharp tip at the center position that helps to keep the bit on the target. They splinter out the backside of the hole when they cut through. Spade drill bits require more torque compared to twisted drill bits.

spade bit selection

They are available in different lengths and because of their simple design, you can sharpen these easily using drill bit sharpener. You can use them for drilling on wood and concrete.

If you are not an expert we will recommend you not to use spade drill bits for making angled hole since it is hard to start angled hole using spade drill bits.

  1. Forstner

Forstner drill bits have a flat bottom with a point in the center position. They are unique in design. You can cut two ways at once using Forstner drill bits. Compared to the previous types of drill bits this type require more pressure to make the drill.

forsner drill for flat holes

For making high precision drill Forstner drill bits are best. For wood and other soft materials, they are highly preferred. They are more expensive compared to other types of drill bits.

  1. Step

This type is named as step drill bits because of their stair-stepped profile. If you need to cut the different size of holes and you want to complete all of these jobs with a single drill bit then you can choose step drill bits.

Step drill bits are popular for drilling sheet metal. It makes drill through metal without doing any damage. They are expensive but comparatively accurate and quick in doing their intended job.

Besides the 5 common drill bits of different shape mentioned here, there are so many speciality shaped drill bits for making holes of a different shape.

Category 2: Drill Bits made of Different material

Generally, carbon steel, high-speed steel (HSS), cobalt steel, solid carbide, and tool steel is used for manufacturing drill bits. After manufacturing the main body it is covered with different types of coating material like black oxide, bronze oxide, and titanium nitride for protecting the drill bits from corrosion, for the convenience of tempering and stress relieving and so on.

Category 3: Drill Bits for Drilling Different Types of Material

Common Drill Bits for Wooden Material

Generally, the following 7 types of drill bits are commonly used for drilling wooden materials

  1. Manual Drill Bits
  2. Three Prolonged Drill Bits
  3. Pallet Drill Bits
  4. Drill C
  5. Forstner Drill Bits
  6. Broca e Drill Bits
  7. Router or Tupi Drill Bits

Common Drill Bits for Metal

Generally, the following 4 types of drill bits are commonly used for drilling metal-

  1. HSS Laminated Drill Bits
  2. Rectified HSS Drill Bits
  3. Rectified Titanium HSS Drill Bits
  4. Rectified Cobalt HSS Drill Bits

Common Drill Bits for Concrete Material

Generally, the following 2 types of drill bits are commonly used for concrete material

  1. Laminated Drill Bit With Tungsten Carbide Insert
  2. Milling Drill Bits With High-Performance Carbide Insert

Common Drill Bits for Glass and Ceramic Material

Generally, the following 2 types of drill bits are commonly used for glass and Ceramic-

  1. SDS drill bits
  2. SDS Plus drill bits
  3. SDS Max drill bits

Final Verdict

If you have the primary knowledge about different types of drill bits and their functionality you can easily decide for which one you should go for. This is a complete guide about different types of drill bits that will help you to take the right decision about purchasing drill bits.

We have tried to cover all the necessary basics in brief so that it does not take a lot of your time and do not cross the limit of your patience. Hope you will find it helpful.

Meta Description

To choose the right drill bit from different types of drill bits available in the market this complete and handy drill bit guide will help you.

Edited By Marcus Kett, Woodworking since 1989

Woodworking for me is in my blood as a son of a traditional boatbuilder. My Father Malcolm Kett was highly skilled and inventive individual often referred to as ‘Malcolm The Boat’. 

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Well that’s Me

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