All about countersink drills

Countersink drills are popular when working with different types of materials: from plastic and wood to steel. Their main feature is the combination of functions: the product simultaneously makes a hole of the required diameter, depth, and removes the chamfer for embedding the head of the fastener. It is worth talking in more detail about what a countersink drill for metal, wood is, about the features of choice and application.

A drill with a countersink is a specialized type of tools, capable of performing several operations at once. Such devices are especially in demand today in the furniture industry, where assembly Euro screws are used. The countersink allows you to drill holes with varying diameters without changing the cutting tool. This element can be one-piece or made in the form of a replaceable attachment.

Modern countersink drills for metal, wood and other materials are manufactured in various diameters. The tail piece can be cylindrical or hexagonal, well suited for installation in a screwdriver or drill.

When using a classic drill, the hole has 1 diameter along the entire length. A traditional countersink - a separate tool used in industry and workshops - also only produces through holes of the same size. The combined version allows you to solve several problems at once, avoiding changing nozzles during operation. Depending on the type and purpose of products, the number of steps in them can vary - usually there are 2 or 3. Each implies a change in diameter.

Combined products such as countersink-drill allow you to achieve high quality and cleanliness of the finish. They can have both straight and helical grooves.

The drill with a countersink is intended for work on metal, wood, and other softer materials. Its combined design allows at the same time, when drilling, to perform chamfering for the head of a self-tapping screw, screw or other metal product. All types of the tool in question can be classified by type of construction, material of manufacture and purpose.

There are only 2 basic types of countersink drills.

1. With tapered countersink type. It is carried out at an angle, the slope of which is determined by the purpose of the product. As a rule, the cone deviates from the straight line by 60-120 degrees. The number of cutting edges varies depending on the length of the tool - there can be from 6 to 12 of them.
2. With a cylindrical countersink... The classic version with an additional cutting element at the base. Most often made with a wear resistant coating. The number of main cutting elements is determined by the diameter of the drill, it varies from 4 to 10. Outwardly, such a product does not differ much from classical counterparts, but when working with it, it is very important to pay attention to centering, if the alignment is not correct, the hole will not be able to be used to drive the screw head.

The countersink drills themselves are made of steel. The most highly valued options, in the creation of which its instrumental, carbide, high-speed varieties were used... Such products are quite hard, have high performance characteristics, and do not lose sharpness of the edges. Alloy steel is also considered a good solution for metalworking. Drills with a countersink made of carbon metals are also produced, since the loads are lower here, they are cheap, but they do not last too long.

Traditionally, for working with wood, non-ferrous metals, a tool made of high-speed tool steel is used.... If you have to drill a hole in steel, cast iron products, use hard alloy. They provide effective countersinking even with increased metal strength. In some cases, during long-term operation, high loads, drilling is carried out using special cooling emulsions.

Countersink drills must be selected according to the same principles as the traditional tool used in metalworking, woodworking. The focus is on the type of work to be done. When it comes to drilling and countersinking metal products, you should give preference to models with a spiral cutting part, made of tool or alloy steel - with higher strength characteristics, corrosion resistance.

Visual inspection is also important. The color of the drill bit will tell a lot about what kind of processing the tool was subjected to.

1. Rich golden hue purchase products treated with titanium nitride. They are very durable and have an extended service life.
2. Black color typical for countersink drills treated with steam. Typically, these products are made from high speed tool steel.
3. Yellow tint purchase products in which stress elimination has been performed, the tempering method is usually used. Accordingly, the steel part has been hardened, will provide sufficient strength.
4. Grey colour, typical for ordinary steel, have tools that have not received additional processing. Their strength characteristics and capabilities are inferior to conventional ones.

An important component of the choice of drills with a countersink is the type of fastener for which the hole is drilled... Conical or cylindrical type of construction is determined by this very factor. It is worth paying attention to the working diameter. Countersink drills are produced in the most popular sizes, while the thickened part of the cut is usually 16 mm in diameter when it comes to woodwork.

Considering all the recommendations, you can find a suitable option for specialized cutting tools for use in the workshop or in production.

The following video talks about countersink drills.