There are a lot of different drill bits types manufactured for different purposes. Some will be better for us to use in general home-improving projects, while some will be more suitable for sophisticated tasks with professional purposes. If you are a new DIYer who wants to build a bookshelf or repair an armchair, maybe you will not need to know much about some advanced types of drill bits. However, learning how to pick the right drill bits among some common types of drill bits will be an essential skill when you start some more complicated project and want to improve your drilling skill.
1. Twist drill bits
The twist drill bit is one of the most common types of drill bits and people use it in several jobs every day. The tip of the drill bits cuts the material and the flute’s job is to remove the swarf from the hole and keep the hole straight. This type of drill bit is also one of the cheapest, but the low price does not mean they are useless. In fact, every DIYer needs them because they are useful in almost all DIY projects that you can think of. The only thing that they cannot cut through is extra hard materials like steel.
The geometry and the material can be changed to produce different specialized versions of the twist bit. The drill bit with a point angle of 118 degrees is the most common as it is suitable for a large number of materials such as wood, plastic, metal. Because it is so versatile, we highly recommend new handymen using this drill bits type for their projects. If you want to drill through soft material, we recommend using a 90-degree one, and if you want to drill through hard material like metals, a 150-degree, and lower RPM will be more suitable. Drill bits with a flat cutting point, as its name suggested, will be a wise choice if you want to drill a flat-bottom hole.
2. Tile drill bits
The tile drill bit is manufactured for drilling through weak material such as glass, plastic, or tile with a tungsten carbide tip. It will be most effective when we use it with low speed (RPM) and light pressure. If you don’t want to use tile bits, you can use masonry bits instead because they are also a suitable drill bits type for drilling through those materials
Tile bits are not strong enough to cut extra-hard material and it is also the reason why we should not use them on hammer action drills. It also requires coolant for the best performance and an extended lifespan. Another drawback of tile drill bits is that their hard tungsten carbide tip is very difficult to maintain and sharpened.
3. Masonry drill bits
Masonry bits are most suitable using on brick, stone, concrete, etc. The cutting tip is often made from tungsten carbide. It is extremely robust, has a long lifespan and provide unparalleled drilling speed. The cross-shape of the tip also can produce clean and accurate holes.
Although we can use masonry bits with a hand drill, it is better for us to use them in a power drill. Be careful when using masonry bits in hammer action drills. Low-quality masonry drill bits can be extremely vulnerable under high pressure. When using a masonry bit to cut materials, you should lower the drilling speed when drilling harder material to extend the lifespan and remain the best performance.
4. Hole saw drill bits
I think all of us can imagine how a hole saw bit looks like after hearing its name. A hole saw drill bit is simply a combination of a normal drill bit and a hole saw around. These special drill bits come in a variety of diameters and tooth sizes and they have the ability to form large, clean and smooth diameter holes.
A hole saw drill bit would be at its best when drilling with low RPM and a minimal force because you will not want the saw to slip out of the spot you are drilling. If the drill bit has already cut through the material but the blade hasn’t, you should flip the material upside down and let the hole saw blade do its work.
If you want to buy quality hole saw drill bits and/or other common types of drill bits, click the image above to discover more about HSS hole saws from our brand SD TOOLS. Our hole saw bits are made of premium High-Speed Steel 6542/M2 and suitable for several materials.
5. Flat wood drill bits
A flat wood bit has the ability to cut through the material and form a wider, flat-bottom hole with an additional mini hole at the center. The center part of the bit helps us mark the location we want to cut through, while both side parts help us to widen the hole. As a result, this drill bits type is most effective when the screw has a shape that needs to be recessed in the bottom of the hole.
An advantage of flat wood drill bits is that they require little steel to produce because the tip of a flat drill bit is… flat, and thinner in comparison with other types, so their manufacture requires only a little steel. Also, that shape can reduce the weight of the bit and the space it occupies, making it more friendly with people who want to optimize the room in their toolbox.
Similar to any other drill bit, a flat wood drill bit has its set drawbacks. Firstly, it can break the backside of the wood into many small fragments, so we need a backing board to reduce this. The second drawback of flat wood drill bits is that even if they are the best type of drill bits in drilling large holes, their shape makes it harder to widen an existing hole.