Types of drills for metal - which drills to choose?

The guarantee of a precisely made hole in the metal is a properly selected drill. Depending on the raw material and the clamping device, different types of working attachments are selected in the cutting device. What drills for metal can be distinguished? What is best for this type of work?

Good metal drills - how to recognize them? 

The parameter that distinguishes the described drills from those intended for other materials is the angle of inclination of the drill, i.e. the position of the cutting blades in relation to each other. High speed steel cutting tools have an angular value of 118 degrees. Thanks to him, maximum efficiency of material processing is achieved.

Another important parameter is the material from which the drill is made. One of them is the HSS steel mentioned above, as well as steel with impurities of cobalt and titanium. Some cutting elements are completely made of vanadium-molybdenum or chrome-vanadium steel. The key to selection is to determine the hardness of the material and the diameter of the hole to be made.

Drills for metal - characteristics of individual types 

Below are the main representatives of drills, which are among the most popular on the market. It is the raw material from which they are made that determines the type of material that can be drilled with them without fear of damage.

Extremely durable titanium metal drills 

Featured titanium drills they are especially useful when handling heavy loads. Thanks to the use of titanium nitride with which they are coated, a very high resistance to abrasion and high temperatures is achieved. This makes them favored by artisans and industries where reliability is the key to efficient operation. Among the models available for everyday use, the right-hand drill HSS - TI type N stands out.

Titanium bits are suitable for cutting metals (except aluminum alloy and spring steel) and acrylic glass, commonly known as plexiglass. Manufacturers recommend using cooling when working with a drill, which, depending on the material, can be water (plastics) or emulsions and lubricants (metals).

Cobalt Precision Drills 

high-quality cobalt drills They are used, in particular, when making holes in heat-resistant, corrosion-resistant and stainless steels. Unlike titanium drills, the most common cutting blade angle is 135 degrees. Thanks to this, there is no need to drill a pre-hole before using the described model.

The presence of cobalt impurity leads to the fact that the cutting accessories acquire a much greater resistance to extreme temperatures and are characterized by an increased service life compared to pure high speed steel. Self-centering properties help to eliminate the phenomenon of sliding the drill on the surface of the material being processed. Titanium and cobalt drills designed to work with solid objects, so they are more often chosen by professionals.

Universal drills for soft materials. 

A distinctive type of metal drills for semi-professional use are HSS accessories. They are less resistant to operating temperatures reaching 400 degrees Celsius. For people who cut metals from time to time or only use drills for home repairs, these are the right accessories. Their point angle is 118 degrees, which means that in order to achieve the appropriate dimensions and centering of the hole, it is worth pre-drilling it with a smaller tool.

High speed steel HSS without admixture of other raw materials helps to reduce the price of the final product. Therefore, the desire to buy good drill bits for metal without spending significant amounts, it is worth considering these types of accessories.

Other types of metal drills 

Popular types of drills include drills with a turned mounting handle. These are HSS steel screw accessories that can be used in smaller drill chucks. They are great for making large holes in metal with standard cutting tools.

Other model conical drill for metal. It is sometimes also called a Christmas tree, phased or multi-stage. The nomenclature comes from its characteristic shape, which allows precise holes to be made, especially in sheet metal and pipes. Due to the self-centering properties of the drill, it is used without pre-drilling the material. The presence of a lower blade and two side blades ensures a stable drill setting even when processing oval-shaped metal pipes.

Countersinks are ideal for reaming holes in hard metals such as steel, cast iron and plastic. Due to the cutting of hard raw materials, they are usually made from HSS-Ti steel. They are highly resistant to extreme temperatures and abrasion. They grind very well and deepen previously made holes.

Method of fastening drills to metal 

What drills for metal choose for a specific device? Basically, there are 4 types of tool attachment in the device. These are the pens:

• morse,
• quick mount,
• SDS-MAX,
• SDS-PLUS.

A Morse taper chuck is part of the drills and reamers that are installed in machine tools. The method of fastening such fittings in devices contributes to the transfer of huge moments with the help of a specially installed handle in the form of a shaft.

While drill bits for metal for tools with a self-locking chuck, they are in the form of a rod with the same diameter. They are the most widely used drills for general purpose applications.

The situation is different with the SDS holder. They are most commonly used in rotary hammers and are used to hold specially designed drill bits. The SDS-PLUS is used in less demanding and lightweight applications, while the SDS-MAX can accommodate drills larger than 18mm.

When looking for good drill bits for metal, it is worth answering the question of what their application will be. If you make holes with repeatable diameters and there are not too many of them, you can make such a set yourself. Otherwise it will come in handy set of drill bits for metal

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