There are several types of drill bits according to the use to which they are destined. The design of these pieces considers the speed with which the material has to be removed and the hardness of the material to be drilled and other characteristics of the material, whether for wood, walls, plates, etc.
In this article you will be able to know all the types of existing drills , the material they are made of and their specific uses.
Wood drill bits
This type of drill bit has a thin, well-defined tip in the center for very precise drilling. This is because wood as a material is very soft and soft and they have to be very precise when drilling.
- Manual Drill Bit. Its use is in conjunction with a manual drill. These types of drill bits allow drilling at very low revolutions of the tool rotation.
- Three-pronged drill for wood.- They are the most commonly used for drilling wood and are usually made of chrome-vanadium steel. Destined for all types of woods: hard, soft, plywood, agglomerates, etc.
- Pallet Drill.- Also known as a sword drill or flat drill for wood. It opens very quickly holes of various diameters with berbiquí or elé drill. This type of wood drill has a very sharp tip, which serves as a center and guide, of very short length, then comes the blade, which is what will make the hole calibrated, according to its diameter.
- Drill c. – Destined to make holes of large diameter. This type of wood drill is also used for metals, concrete and glass. They consist of a toothed crown in whose center usually a conventional bit has been fixed that serves for centering and guiding the hole.
- Forstner Drills.- Like the previous ones, they are used to create circular holes of different diameters. These types of wood drill bits make clean cuts and remove wood waste efficiently.
- Broca e. – It is used to drill holes where the screw is embedded or drowned in wood very popular for joints of the pocket hole type. It is a drill bit for wood with double diameter; the first portion is of the approximate diameter of the body of the screw that lodges. The second portion, longer than the first one, is the diameter of the bit, which will completely lodge the diameter of the screw head.
- Router or Tupi Drill Bits.- These types of drills have several forms for the preparation of different profiles or cuts. The best known are those with two cutting faces.
Metal drill bits
also known as HSS drill bits. As the name says they are used for drilling metal and some other materials such as plastic, brick and even wood. They are made of fast steel (HSS), although the quality varies according to the alloy and according to the method and quality of manufacture.
- HSS laminated drill. – It is the most economical of the metal drill bits. It is commonly used in metals and plastics where precision is not required. It is not very durable, as it is a type of metal drill that is not very well calibrated and easily loses sharpening with hard materials.
- Rectified HSS drill. – It is a drill of greater precision, indicated for all types of semi-hard metals (up to 80 Kg./mm²) including cast iron, aluminum, copper, brass, plastics, et cetera.
- Rectified titanium HSS drill. – They are covered with a titanium alloy that allows to drill all types of metals with the highest precision, including difficult materials such as stainless steel. These types of metal drill bits can be used in high production machines but need cooling.
- Rectified cobalt HSS drill.- These are the highest quality metal drills, and are recommended for drilling metals of all types, including very hard metals (up to 120 Kg./mm²) and stainless steels. They have a special resistance to temperature, so that they can be used without refrigerant and at high cutting speeds.
Concrete drill bits
They are used for drilling walls and building materials exclusively. These types of drills can be used with percussion. In the head they have a reinforcement that gives them a “shovel” shape since it is reinforced with a material of great hardness to increase the duration of it and guarantee its perforation capacity.
- Laminated drill bit with tungsten carbide insert.- The body is laminated and is indicated for plaster, cement, brick, uralite, sandstone and limestone.
- Milling with high performance carbide insert.- The body is milled, and in addition to all the previous materials, it drills marble, concrete, slate, granite and in general all types of stone without problems. Its power of penetration and its duration is much higher than the previous one.
Drill bits for glass
These types of drill bits are composed of a rod and a tip of tungsten carbide (widia) shaped like a spearhead. They are used for drilling glass, ceramics, tiles, porcelain, mirrors, tiles, etc.
SDS drill bits
SDS drills bit, which unlike conventional, have a direct input, different in thickness and design, providing superior performance to the drills as they allow higher revolutions.
- SDS.- The input of this bit is compatible with the SDS Plus and is used for light work.
- SDS Plus .- It is the most popular drill in professional applications. 4 to 30 mm with fine insertion.
- SDS Max .- The entry of the bit is different and it is used for heavier jobs because its diameter is much higher. From 12 to 40 mm thick.
Tip: It is recommended that when the bits are not in use, they are stored without there being a contact between them and much less between their edges.