When you’re purchasing a drill bit, you need to consider the strength of the bit for the job. Some types are made of high-speed steel, and others are made of cobalt or carbide. Cobalt drill bits contain up to five percent cobalt in their base material. These bits are not designed for general-purpose use. Carbide drill bits, on the other hand, are made of the hardest and most brittle material available.
Wood drill bits have two distinguishing features
Wood drill bits are specially designed for drilling holes in wood objects. They are designed to drill holes through wood without splitting or splintering the material. To help you select the best wood drill bit, here are the two features you should look for. You can purchase them from your local hardware store or online.
Auger bits are used for deep holes in wood, particularly thick man-made boards. These bits can be very sharp and should only be used with a hand brace. They are threaded in the center and have a single spur. They are not appropriate for power drills, and must be sharpened periodically.
They are coated with black oxide or titanium
Drill bits coated with titanium or black oxide are more durable and have longer life than regular steel bits. These materials also resist breakage and corrosion. However, they cannot be resharpened. Therefore, if you’re planning to drill lots of holes, you should invest in titanium drill bits.
Titanium drill bits have multiple layers that protect the metal, so they should last much longer than black oxide bits. Black oxide bits are cheaper, but they don’t last as long as titanium bits. While titanium drill bits tend to last longer, black oxide bits are better for some applications.
Metal drill bits are generally black in color. They are made of titanium, cobalt, or tungsten carbide. If you’re buying a new drill bit, check to see which metal it’s coated with. Also look for a wide-angled point.
They have a point angle
Metal drill bits have a point angle that determines their cutting ability. The angle of the point of the cutting head is dependent on the material being drilled and must be matched to the material’s hardness. For example, a hard material requires a larger angle than a softer material, and vice versa. The point angle also affects wandering, chatter, and wear rate.
There are several point angles in a metal drill bit, but the two most common are 135 degrees and 118 degrees. These angles are generally acceptable for most applications, but for certain materials the angle must be optimized.
They have a coolant channel
Metal drill bits have a coolant channel that can be used to prevent overheating. This feature can extend the life of the drill bit. They come in many different configurations and can be used for various applications. Some of these include fast spiral, multi-flutes, and straight flute. They can also have different geometries for the cutting face.
This kind of drill bit can cut quickly and withstand high axial loads. They are often used for holes less than five times the diameter of the bit.
They are cheaper than titanium
While metal drill bits are cheaper than titanium, they are not the same. They have different qualities and will wear out over time. Titanium drill bits are better for wood and softer metals because the coating won’t chip or wear away as easily. However, you will need to sharpen titanium bits more frequently. This will also wear down the coating. As with any drill bit, the choice between titanium and cobalt drill bits will depend on your budget and the material that you are drilling.
Titanium drill bits are also more expensive than black oxide drill bits, but are far stronger and tougher. They are also more resistant to rust and water than black oxide drill bits. These drill bits can drill harder materials than cobalt drill bits and black oxide bits. Titanium drill bits are also stronger and better resistant to heat than cobalt drill bits.
