To be able to drill a hole in any type of material, the correct drill bit must be used. It needs to be used in the correct manner and it needs to be sharpened thoroughly. Many jobs around the house require a hole of some kind to be drilled – whether it is putting up a shelf, building a cabinet or hanging a light. Good quality drill bits can be expensive, so take care of them, keep them in a case or box if possible, rather than allowing them to roll around loose in a toolbox where the cutting edges may be damaged.
Drill bits are cutting tools used to create cylindrical holes. These small bits are held in a tool called a drill, which rotates them and provides torque and axial force to create the hole. Specialized bits are also available for holes that are non-cylindrical. There are so many different types that it will take me a while to list them all. However, I am interested in drill bits for wood, as I am a frequent DIY-er and am planning my next project.Find additional information at pdc bits.
I did some research on the different types of drill bits for wood and came upon a couple of different material bits that can be used for drilling wood. The first is low carbon steel: these bits are used in wood, as they do not hold an edge well and require frequent sharpening. Their lifespan can be shortened when used to drill hardwood, making them cheaper than long-lived bits. High carbon steel bits are an improvement on low carbon steel due to the hardening and tempering capabilities of the material. These bits can be used on either wood or metals, but may lose their temper. If this happens, they develop a soft cutting edge due to overheating. High speed steel bits, which are a form of tool steel, are much more resistant to heat. They can be used to drill metal, hardwood and most other materials at greater cutting speeds than carbon steel bits. They have replaced carbon steel bits in commercial applications.
As you know, there are different kinds of drill bits, but drill bits for wood are known as a lip and spur drill bit, also known as a brad point and doweling bit. The lip and spur type is a variation of the twist drill which is optimized for drilling in wood. Conventional twist bits tend to wander when pressed to a flat work place. For metalwork, this is countered by drilling a pilot hole with a spotting drill. In wood, there is another possible solution, using the lip and spur drill. The centre of the bit is given not the straight shape of the twist drill, but a spur with a sharp point and four sharp corners to cut the wood. The sharp point of the spur simply pushes into the soft wood to keep the bit in line.