Drill Bit
From RitchieWiki
Prior to the invention of drill bits, materials were put together using rivets and bolts. Made from carbon steel or high-speed steel, the bit was developed around 1845. Some bits are made from tungsten carbide, a material capable of drilling into some of the hardest materials found on sites. Polycrystalline diamond (PCD) is another type of hard material capable of cutting through even the most challenging matter.[1]
There are many types of drill bits, each designed for cutting holes in different types of materials, such as brick, glass, rock, plastic, and wood. Bits are available in different types: flat-faced, convex, concave, and kavex. Bit sizes for the cones are typically between four and seven inches (10.2 and 16.5 cm).
Flat-faced bits are used in heavy-duty drilling applications where the drilling is deep. As described, the face of the bit is flat as it drills.
The convex bit is used in applications where the rock is somewhat worn away and drills with two buttons as opposed to one.
The concave bit is one of the most common. It is used in medium to hard rock applications, and drills a straight hole.
The kavex is a combination of both the concave and the convex with a bit that works best on abrasive materials, drilling straight holes.
Bits have different types of faces, which are suitable for varying applications.
The double-domed face is similar to the dome shape, but with an additional dome positioned on top of the other. The additional bit adds life to the bit while providing a sharper penetration.
Ballistic bits are capable of drilling in more rapid motions, but are used less because they tend to break when used in certain formations they were not designed for.[2]
