Is the Color of Drill Bit Directly Related To the Quality?
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Is the Color of Drill Bit Directly Related To the Quality?
A drill bit is a cutting tool used to remove material to create holes, almost always of circular cross-section. Drill bits come in a wide range of shapes and sizes, and are available in a variety of materials and coatings. Today we will talk about the different colors of drill bits. Someone will ask why is there a color distinction between drills? Is the color of the drill bit related to the quality? Which one is better? OK, here's a quick overview of several colors of drill bits.
Why is there a color distinction between drill bits?
Because the surface treatment process of the drill bits is different, and the color of the coating is different. Let me introduce the different coating for you.
| Color | Coating | Features | Workpiece |
| Bright | — | Polished for increased chip flow | For use in plastics, woods and aluminum. |
| Black | Black Oxide | It’s an inexpensive coating, helps reduce friction and increase chip flow | For ferrous materials, stainless steel, copper and copper based alloys, zinc, powdered metals, and silver solder. Not for nonferrous materials. |
| Gold | TiN | Can be run faster than uncoated drills and increased tool life. | Used on titanium alloys, steel, carbide, and aluminum components |
| Blue-gray | TiCN | Harder and more wear-resistant than other coatings. | Great for stainless steel, cast iron, and aluminum. |
| Violet color | TiAlN | Can extend tool life five or more times. | For use in high-alloy carbon steels, nickel-based materials, and titanium. Not used for aluminum. |
So is the color of the drill bit directly related to the quality?
I would say no.
First of all, it is impossible to judge the quality of the drill bit simply from the color. The color is not directly related to the quality of the drill bits.
Of course, you can make a general judgment from the color, but the current poor quality drill will also have its own color treatment to achieve the appearance of a quality drill. Most of the black drills currently on the market are only black in color (to cover up burns or black skin on the surface of the tool), but the actual use has not been effectively improved.
Our has different colors drill bits with the best quality for your choice. From experience, most popular one is the gold color and blue-gray color drill bits. Of course, black drill bits is also popular cause its cheaper cost.
Hope it will works when you are choosing the right drill bits for the task.
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