Why Are Drill Bits Different Colours?

The quality of drill bits is not directly linked to the colour of the bit.

Drill bits of varying quality undergo different processing processes, which in turn causes them to be different colours. Poor quality drills will usually be colored. High-quality, fully ground HSS drill bits will be white, while rolled bits can be made white by finishing the outer round.

To help you understand the differences between the various colors of drill bits, let us look at their common uses.


Cobalt drill bits are made from a high-speed steel alloy containing between 5 and 8 percent cobalt. This material is perfect for metal drilling due to its ability to resist the tremendous heat that is generated during the drilling process. However, if you don’t know much about drilling, you can consider purchasing a drill bit set, which includes various types of drill bits. However, you should know that it’s important to select the right type of drill bit for the job at hand.

One of the main differences between titanium and cobalt drill bits is their coating. Titanium drill bits tend to lose their coating over time, and will no longer be sharp. However, cobalt drill bits are able to retain their shape and sharpness. If you’re considering investing in cobalt drill bits, you’ll have to consider how much metal you’ll be drilling, and whether the job will be a high-speed steel or a softer material.

Cobalt drill bits are gold in colour. These bits are made of a cobalt alloy, which makes them incredibly strong. They can also withstand high temperatures, meaning they won’t lose their sharpness if you accidentally drill too deep. And, because they’re made to last, they’re usually more expensive than other drill bits. You can purchase cobalt drill bits individually or in sets.

Moreover, the color of drill bits does not necessarily indicate the quality. Different drill bits are treated differently, and different colours mean different things. Poor quality drills will have a color treatment, while high-quality drills are fully ground. Similarly, rolled bits will also appear white. However, you should never use the colour of a drill bit as a criterion for determining the quality.


Cobalt and titanium drill bits are similar in many ways, but their properties and costs vary. Titanium drill bits are made of steel coated with titanium nitride, while cobalt drill bits are steel and titanium mixed in an alloy. Titanium drill bits are stronger, but can lose their coating over time. Cobalt drill bits are more expensive than titanium ones, but may last longer. Both types are strong and durable, but they each have different characteristics.

The main difference between titanium and cobalt bits is in the coating. Titanium drill bits can come with a thin coating of carbonitride or titanium nitride. The carbonitride version is harder than titanium, but the latter isn’t good for aluminum drilling. The cobalt drill bit is used for hard tasks, such as drilling stainless steel. Cobalt and carbide bits are mainly used in production applications.

High-Speed Steel drill bits come in three basic colour schemes. Those coated with gold are more durable and can be used in harder materials like granite and marble. Titanium drill bits are the same colour as HSS bits, but different treatment processes will change their lifespan. By understanding the difference between the two types of coatings, you can avoid wasting money on a drill bit or incompatible materials. In addition, titanium drill bits have higher durability than HSS drill bits and can be used for tougher materials.

While titanium drills are durable, cobalt drills can also damage steel. While titanium drills are resistant to hard metal, they have limited ability to drill soft materials like cast iron and softwood. Cobalt drill bits are more expensive than titanium drill bits, and their cutting edges may chip. Therefore, wood drillers should regularly clean their wood drills to avoid losing the benefit of Titanium nitride.

Cobalt alloy

There are three common types of cobalt drill bits: black, red, and blue. Each type is designed for different applications. Cobalt drill bits are best used for hard alloy steels such as titanium and stainless steel. This alloy has the ability to withstand high drilling temperatures and can be resharpened multiple times. While they are better for steel, they are not suitable for general applications. Some people prefer to use HSS drill bits instead.

When comparing the different types of cobalt drill bits, the most important feature to consider is the amount of cobalt in the steel. Its content ranges from 5-8%, which makes it one of the strongest and most durable options on the market. Because cobalt is so strong, it also helps steel to withstand high temperatures. Drilling with high temperatures is dangerous for both the drill bit and the material being drilled. Cobalt drill bits are able to withstand temperatures of 1,100 degrees Fahrenheit.

Titanium and cobalt alloy drill bits have different hardness ratings. The former has a harder surface than cobalt drills, and titanium has a higher hardness. However, these drills cannot be sharpened because they lose their coating and heat resistance, so they may require more frequent replacement. For this reason, titanium drills are not recommended for drilling steel. The other common colour category is gold drill.

While cobalt drill bits are more expensive initially, they are well worth the investment. A good quality cobalt drill bit will last for many years and will not dull easily. This gold colour is due to the baking process and will not affect the quality of the drill bit. Cobalt drill bits are easy to sharpen and will not lose their strength easily. They can also be sharpened without sacrificing strength.

High speed steel

There are a number of high-speed steel drill bits available. These bits are made from high-speed steel, which is a type of alloyed carbon steel. They are particularly suited for drilling soft metals such as plastic and wood. These drill bits have different colours based on the material they are designed to drill. Generally, high-speed steel drill bits have a black coating for corrosion protection and aesthetics.

The color of a drill bit is not a direct correlation with its quality. Drills of different quality will display different colours. Colored drills may be a sign of poor quality. A fully ground HSS drill will typically appear white. Some rolled bits may be made to be white by completing the outer round. To find the right drill bit, first know the material that you are drilling. Then, choose the size of the target hole.

Black oxide-coated HSS drill bits have higher wear resistance and are used for drilling aluminum and other tough materials. Black oxide-coated HSS drill bits have better corrosion resistance. Whether you are drilling wood, light metal, or aluminum, HSS drill bits are the best choice for your drilling project. These bits are also less likely to chip or flake, ensuring a longer tool life. If you’re not sure which colour to choose, you should read the product’s manual and consult an expert in the field.

While high speed steel drill bits are the most common option, you can also get special twist bits coated with Titanium nitride (TiN). This material increases bit hardness and also provides a self-lubricating feature. They’re best used for drilling metal, but can also clog up when drilling wood. Therefore, regular cleanup of waste is essential to maintain optimum functionality of your drill.


Despite their similar shapes, drill bits may have different colors. The different colour is due to the cutting edge of the drill bit, which may develop a curly or burred edge over time. When used for drilling, drills usually have two centers of rotation at 600-degree intervals. The difference in blade height suppresses the expansion of the hole. In order to avoid this, drill bits have different shapes. The shape of the holes varies depending on the drill bit and the type of drill being used.

While the colour of a drill bit may look like a reflection of the material in which it is used, it does not have anything to do with its quality. Different drill bits are processed differently, so their colours do not indicate the quality of the bit. A low-quality drill will most likely have a color coating, while a high-quality drill will be completely white. Rolled bits can also be white by finishing the outer round.

Using a drill that contains a metal bit will wear the metal down faster. You should avoid leaning too hard on the bit, as it may cause it to break. This action is counterproductive and will cause the drill bit to overheat, causing it to become unusable. If you’re unsure of what drill bit you need, check out the screwfix website, as they stock many different types of drill bits.

Drill bits are usually made of a metal that differs in composition. High-speed steel, for example, is suitable for drilling wood, plastic, and soft metals. Carbon steel, on the other hand, is suitable for drilling more difficult materials. If you’re drilling metals with a high-speed steel drill bit, you should consider using a high-speed steel bit. A carbon steel drill bit made of high-speed steel is harder and more brittle than a standard drill bit.

More from author


Please enter your comment!
Please enter your name here

Related posts


Latest posts

How to Break the Bead on a Lawn Mower Tire

If your lawn mower tire has become obstructed, you may be wondering how to break the bead. Luckily, this task is quite easy, and...

How to Start a Riding Lawn Mower That Has Been Sitting For Years

Usually, riding lawn mowers that have been sitting for years can be revived if you pay attention to the engine parts and perform a...

Lawn Mower That Stalls When Tilted

If you've experienced a lawn mower that stalls when tilted, you may need to repair the fuel tank. If you've left your lawn mower...

Want to stay up to date with the latest news?

We would love to hear from you! Please fill in your details and we will stay in touch. It's that simple!