Drills, designed to form holes in the details, made of different materials, found wide application not only in industry, but also in everyday life. Large selection of such tools, offered in the modern market, often raises questions, how to choose a drill for metal, even from experienced professionals, not to mention ordinary consumers. To select a tool, a number of factors need to be considered, which we want to talk about in this article.
Varieties of drills for metal
characteristic of drills
The question is, how to choose drills, often occurs in those, who needs to get a hole in the products, made of different steels, details from pig-iron and non-ferrous metals. Drills for working with such materials are called spiral, because their working surfaces have a spiral shape. Between the work surfaces are two longitudinal grooves, with their help from the formed openings shaving is taken away.
A characteristic difference of such drills is the shape of their tail, which can be cylindrical, conical and hexagonal. The tool with a conical shank can be inserted into the working body of the machine directly, and for models with shanks of cylindrical and hexagonal type it is necessary to use special cartridges.
Not only labeling is important when choosing, but also color, to which special attention should be paid.
Color and marking of drills
Drills on metal, having a black color, differ in the increased wear resistance, as superheated steam was used during their finishing. If the finished drill has been released, which helps to relieve internal tension, then it will have a light golden color.
Elements of a spiral drill
Drills on metal are of the highest quality, possessing not only increased strength, but also the ability to reduce friction in the process of their work. Such properties are possessed by the tool of bright golden color, the working surface of which is covered with a layer of titanium nitride.
If you want to choose an inexpensive drill for metal, pay attention to the following, that have not been subjected to any additional processing. Such a tool, whose service life is very small, has a gray color.
Marking of drills is determined by the diameter of their working part. Tools up to 2 mm are not marked at all. On drills with a diameter 2-3 mm indicates their size and grade of steel, over 3 mm - manufacturer, accuracy class.
At the beginning of marking of any drill on metal the letter P is present, which speaks for itself, that it is made of high-speed steel. If in the material, from which the drill is made, contains additional alloying elements, then in its marking there is the first letter of their name and number, which informs about their percentage.
Drills TL300 of the RUKO trademark
TL300 drills, which are issued under the RUKO trademark, well known to the domestic consumer. The drill of this model range can be chosen for its affordable price, as well as high quality and reliability. Drills of this series, which have a cross sharpening, that complies with DIN 1412C, are made with a diameter over 3 mm. TL300 drills are sharpened at an angle 130 degrees, and some models in this series may have coverage, consisting of titanium nitride, as well as titanium aluminotride and other materials.
Drills of the RUKO trademark
The models of this series belong to the category of multi-purpose, but their characteristics are optimally suitable for drilling metals, which are prone to the formation of shavings of medium and long length.
Models of this series (HSS-G) optimally suited for forming holes in parts, made of carbon, alloy steels, as well as cast iron, alloys containing copper and aluminum.
HSS-EE models, in addition to the above metals, can be chosen for drilling parts made of stainless and acid-resistant steels. HSS-G TiN and HSS-G TiAIN drill models are even more versatile, which can be selected for drilling parts made of titanium and its alloys.
Drills of the BOSCH HSS-CO model range
Tim, who thinks, how to choose the right drills for metal, Be sure to pay attention to the tools of the HSS-CO model range, manufactured by the well-known company BOSCH. On drills of this model, made of high-speed steel, additionally applied oxide coating, which promotes fast removal of shavings from a drilling zone. The working edges of this tool are sharpened at an angle 135 degrees and additionally processed by the method of grid grinding, which allows you to choose them for the formation of holes in any metal.
BOSCH HSS-CO drills
Metal, from which HSS-CO drills are made, additionally enriched with cobalt, which gives the tool high strength and thermal stability. This material also has a high tensile strength, which is 1000 N / mm2. Such characteristics allow you to successfully choose tools from it to solve even the most complex technological problems.
It is also important to note, that the tools of the HSS-CO model range have an accuracy class of H8, so you can choose them to get holes, exactly corresponding to the specified parameters.
Drills of the HAISSER trademark
Marking of drills, which must contain the name of the trademark HAISSER, talk about it, that in front of you is a tool with a titanium coating, able to withstand extreme loads. Titanium coating, which is applied to the surface of such drills, sharpen the pores of the cross-shaped scheme, provides efficient cooling.
HAISSER drills
Due to exceptional durability, durability and ability to perform drilling with minimal friction, such a tool has been widely used in enterprises of various industries. Titanium nitride coating is applied to the working surface of such drills, which also minimizes the effect of cold welding.
Such drills can be chosen to make holes in the details, made of different materials: alloy and non-alloy steels, copper, bronze, polymeric materials, metal ceramics, etc..
Drills of the ZUBR trademark
The material for the manufacture of drills for metal under the trademark "ZUBR" is high-speed steel P6M5K5, which contains 5% cobalt, which gives it high strength and durability.
If you think about it, how to choose the right drill for metal, by means of which it is possible to receive effectively openings in corrosion-proof, heavy steels and non-ferrous alloys, then you should definitely pay attention to inexpensive and high-quality goods of this brand. If necessary, you can choose a flexible drill for metal.
ZUBR drills