The Hand Tools company offers to buy metal drills from RESOLUX. Products manufactured under this brand are designed for comfortable work and making the most accurate holes in metal.
Depending on the standard, materials, characteristics, cost and production method, they are distinguished Various types tool.
1. Rolled drills R6M5 with the following characteristics:
Drills are mounted in three-jaw chucks of machine tools or hand drills. Manufactured in sizes starting from 13 mm. In this case, the shank is ground down to 13 mm, due to which a drill with a diameter of 16 mm can be fixed in a 13 mm chuck.
2. Drills for stainless steel P9 with the following characteristics:
Tools allow you to process with maximum efficiency stainless steel, structural and other difficult-to-process steel grades. They are located in the middle price segment.
3. Drills R6M5 with accuracy class A1
This professional tools, widely in demand for production needs, at enterprises where increased demands are placed on the properties and characteristics of products, as well as on the precision of drilling.
In the production of tools in this series, high-quality steel grade R6M5 and the grinding method are used.
Suggested sizes: 1 - 13 mm.
Rolled drills are the most attractive in price, as they are made in the simplest and most accessible method. The low cost of the rolling method is explained by the high speed and automation of production:
Grinding a working spiral from a solid workpiece is the most expensive production method. The reasons for this: low production speeds, the most careful processing and, as a result, the highest quality of the product.
Drills with a conical shank are produced by milling. Since complete automation of the process is impossible due to big size blanks, it requires a lot of time.
You can buy long and elongated drills with a conical or cylindrical shank from the company " Hand tool" in Moscow. For more information about prices for metal drills, please call.
Metal drills are two-pronged cutting tools, the teeth of which have a wedge-shaped body, which is limited by the presence of a front as well as a back surface. Used for machining holes on drilling machines. Forms holes in different materials, are made of high-speed, alloyed material. What types of drills are there? Twist, feather, centering, deep hole, flute and annular drills are popular in industry. When choosing the necessary cutting tool, first of all, you need to pay attention to its performance qualities, for example, the material of manufacture, heat treatment features, and sharpening angles. Therefore, it is extremely important to know which metal drills are best.
First of all, you need to pay attention to the sharpening angles of the cutting part. Geometric parameters The cutting parts of the tool include rake angle gamma, clearance angle alpha, point angle 2 phi, cross edge angle psi and helical flute angle omega. The choice of inclination depends on the characteristics of the surface.
Back tilt settings affect tool life. Alpha in devices reduces the work of friction and the intensity of wear on the rear surface. But if it is too high in the device, then the heat dissipation of the object deteriorates, and the strength of the cutting part also decreases.
The vertex angle of 2 phi affects the possibility of processing the material, whether it be steel, stainless steel, cast iron, brass, Aluminium alloy, copper or marble. By the way, you can order a marble window sill here.
The tilt parameter affects such features cutting tool, How:
1. Durability
2. Ability to process various materials
Also, when choosing the best drills for metal, it is necessary to take into account the features of the cutting process, speed, chip yield, diameter of the device and the specific application of each device.
Some of the most important parameters are:
A high-quality drill should be made of high-speed steel, which contains molybdenum and tungsten. You should not choose gray devices, as they have a very short service life. The way a metal drill looks like is one of its most important characteristics.
When choosing a tool, it is important to pay attention to the nomenclature and labeling of the device from each manufacturer. The marking depends on the diameter of the installation. Up to 2 mm, structures are not marked; up to 3 mm, the steel grade and diameter are noted. Larger instruments carry information about the manufacturer, and they are also marked with an accuracy class.
The marking begins with the letter P, which stands for high-speed steel. Numerical value indicates content various substances in an alloy. For example, K6 means that the alloy contains cobalt, MZ - that there is molybdenum. If you purchase an imported unit, the marking will be in the form of the following values: HSS or Din.
Among the high-quality cutting objects, the following manufacturing companies are distinguished:
Ruko drills model range TL 3000 stands out on the market due to its reasonable price and material High Quality. Drills with a diameter of 3 mm are designated Din 1412 C, as well as a sharpening angle of 130 degrees. Manufactured using titanium nitride and titanium aluminum nitride coatings. They are used for drilling great depths, as they have a set of multi-purpose designs.
Bosch drills are distinguished by an oxide coating, which removes chips when drilling, and have a mesh grinding with a sharpening angle of 135 degrees, which is suitable for any material. They have high strength and heat resistance due to alloying with cobalt, cope with heavy production tasks, have an h8 accuracy class, and a tensile strength of 1000 N/mm 2.
Nachreiner, Guhring, Werko drills are devices from foreign manufacturers (Germany), which are manufactured according to all the most important standards, they are the most expensive, their cost starts from 300 rubles.
You should not choose structures made in China, even though they are the cheapest, as they are characterized by increased fragility, low tensile strength, and a short service life.
When choosing the cutting tool you need, be sure to pay attention to the manufacturer, as well as the main specifications and selection criteria (service life, operating modes, material processing). By choosing the best drill, you will be able to use it efficiently for a long time.
Drills and drill bits are the most basic tools in household, and almost everyone has it, and those who don’t know where to get it. Sooner or later, everyone will have to use a drill. Or if with wood or even stone everything is more or less clear, and you can drill a hole, so to speak, by touch, by feeling, then with metal this will not work. This is a very stubborn material. Let's figure out which metal drills are better? Drilling is an entire art that can be studied and improved: drilling angle, pressure, but most of all, experience and the tool decide.
The problem is that most drills are sold Bad quality, especially in markets. It is better to order online or in specialized stores where you can see and touch the material.
There are a huge variety of metal drills; in addition to the fact that you need to look at the quality, you also need to pay attention to the shape and color. The product is built from the following elements:
Metal drills come in many different shapes, each of which is used for a specific type of work.
The most common type known to everyone is spiral. In essence, it is a cylinder-shaped rod, and on the sides there are one or two spiral grooves (it is because of them that the chips are removed). In turn, twist drills have their own subtypes:
Conical step drill. Unlike a cylindrical one, it can make holes of different diameters. Used to create new or expand existing holes.
Flat drill. As the name suggests, the working surface of this type is flat. The main disadvantage: due to its flatness, the chips are not automatically removed; you have to remove them manually. In addition, you cannot make large holes with this drill. But despite the huge disadvantages, they are in demand because they are very cheap and insensitive to distortions during drilling.
Core drills have different shapes cylinders, but top part It is devoid of a base and is covered on the sides with teeth, which are made of hard alloy or coated with diamond sputtering. Used to create holes of different diameters.
The following types differ in that they are created specifically for hard metal, while the previous ones are not suitable for high-density metals - they will break.
These are the facts that can tell the shape and structure of the drill, but the color also matters:
Decide for what task you need a drill (what material needs to be drilled, what diameter of the hole), you can rely on this. Now you definitely won’t take a cobalt drill to make a small hole in a thin sheet of iron or vice versa.
The manufacturer can also play a role; the drills can be identical, but from different companies, in which case choose a manufacturer that you know or have dealt with.
To determine the working diameter, look at the marking, since on products up to two millimeters it is not marked at all, from 2 to 3 mm only the company’s mark is placed, and on products from 3 mm both the manufacturer and the working diameter are marked, so you should pay attention to this.
The variety of drills for hardened metal is huge, so there is no point in choosing, looking on the forum for which one is better, it all depends only on two things: the task that needs to be completed and the size of your budget for the purchase.
Metal drills are intended for drilling holes in alloyed and non-alloyed steel, its various alloys, cast iron, and other types of various metals, as well as in particularly hard plastics. In addition, drills are used for drilling ready-made holes and drilling or, in other words, for creating blind recesses in metal. To understand how to choose a drill for metal, it would be nice to have at least a basic understanding of their classification, materials of manufacture and design features different types this cutting tool.
Metal drills differ from each other in several ways: manufacturing method, shank shape, scope of application, and, of course, diameter. First, let's see what kind of metal drills there are according to their design features. Here are their main types:
It should be noted that these are only the main groups of drills, each of which has its own subtypes. So, before choosing a drill for metal, you should decide which shank, or in other words, the part of the drill that is fixed in the chuck, will suit you best. Based on this feature, metal drills are divided into three types: with a cylindrical shank, hexagonal and conical. The first of them is the most popular and widespread, suitable for almost all drilling tools. Tapered shank drills are mounted without a chuck at all on some types of drills or drilling machines.
In addition, according to characteristic features Their manufacture of metal drills are:
As a rule, all the necessary information about metal drills is applied to the drill itself. By understanding the markings, you can easily choose metal drills that are best suited for a particular type of work. In addition, the marking of the drill will tell you what material it can handle.
The vast majority of metal cutting tools are made of high-speed steel, which may have various impurities, such as tungsten, cobalt, chromium, vanadium or molybdenum. The presence of one or another additional metal in the composition of high-speed steel can be understood from the markings of the drill. So, the letter M indicates the presence of molybdenum in the alloy, the letter F indicates that the alloy contains at least 3% vanadium, and if the letter P is present in the marking, then this is a sign that the alloy contains tungsten. It should be noted that chromium and carbon are not marked.
What is high speed steel? This is a type of steel that has ultra-high hardness, resistance to fracture and outstanding red-hardness. Thus, conventional carbon tool steels are not capable of providing high drilling or cutting speeds, but high-speed steels, thanks to alloying with the above-mentioned impurities, successfully cope with such extreme conditions.
In addition, not only the markings, but also their color can tell something about the materials from which drills are made. So, bright golden indicates that the drill is coated with titanium nitrite. Such drills have a long service life due to their increased wear resistance. And the black color of a drill, for example, indicates that it has been treated with steam, which also improves the quality of the cutting tool.
Not everyone can afford to buy new drills every time they become dull. Moreover, a high-quality metal drill, and not a cheap Chinese knockoff, is quite expensive. Good news The point is that if you have basic skills and a sharpening machine, you can sharpen a drill at home, thus avoiding unwanted financial expenses. Even if you don't have a home grinding machine, suitable for this purpose regular drill and a grinding wheel. When sharpening a drill, you need to keep in mind that not only the drill head should be processed, but also the entire side cutting edge.
A metal drill is one of the most popular tools of a mechanic. At the same time, not every master has sufficient experience to choose the right tool. Let's focus on the main parameters for choosing this tool and consider the design features of various drills.
The stores offer both single drills and entire sets - let’s look at when it would be convenient to buy a set, and when it is not necessary. Let's learn to distinguish low-quality drills from good ones.
A metal drill has a special design for cutting this particular material, but can also be used for cutting wood and plastic.
It consists of the following elements:
Drills with a narrow working part. Compared to other drills:
Feather drill for metal with replaceable inserts
The most common type of drill, optimal for creating holes in metal. It is a metal rod with side grooves covering the entire length of the tool. It is these lateral spiral grooves that determine the main property of the drill - removal of chips from the holes.
According to their purpose, twist drills are divided into several subgroups:
Designed for drilling holes large diameter. They are a large metal glass with teeth on the edge. In some cases, instead of teeth, various coatings of metals or diamonds can be used. To work with high forces, crowns are made of hard alloys.
Drilling occurs only with outside, so the middle of the hole is simply left empty.
The working surface of drills of this type is smooth and consists of steps. Used to make holes in thin materials. Thanks to their shape, they are easily centered at the first moments of drilling, which, of course, is more convenient than with cylindrical drills. Another undoubted advantage is that with one drill you can produce holes of different diameters; this is easily adjusted by the depth of immersion of the drill into the material. We drilled one diameter to the first step, went deeper one step and increased the diameter.
With such drills you can not only create a new hole, but also expand an existing one.
Manufactured from high-speed steel or HSS. At the same time, they are additionally alloyed with cobalt. It is this that creates the necessary strength for the drill, resistance to fracture and temperature loads. Cobalt drills cope not only with materials of increased hardness, but also with viscous materials. Of course, the high properties of cobalt drills require more significant costs from the buyer, but in our opinion, these costs are completely justified. The performance of one cobalt drill is high enough to replace several non-alloy steel drills.
The hardness of cobalt drills is high enough to drill materials without punching the workpiece before starting work.
The cutting surface of this type of drill is reinforced with special carbide inserts, while the base of the tool is made of CS. The plates are made from carbide alloys, which have increased hardness and wear resistance. Drill blades are sharpened only once during production and cannot be re-sharpened. Such drills are used for working with particularly hard alloys and metals or for thick metal workpieces.
For the right choice For metal drills, you need to know not only the final task you are working on, but also understand what characteristics the material that needs to be drilled has. Here are some good questions to answer when choosing a metal drill:
For example, for large-diameter holes in metal, powerful drills with low speeds are used.
The color of the surface of a metal drill is a parameter by which one can judge the quality of the presented tool, but, perhaps, this is one of the most dubious ways to determine the quality of the tool. A snag in gray and black drills.
There is a point of view that gray drills are the cheapest and unsuitable even for one-time work. Without any improvements or special processing. It is not true. For example, drills that have undergone oxide treatment may well be gray. Therefore, when choosing a drill, do not believe the stories and do not run past the gray drills - they may be quite suitable for the job.
There is an opinion that black drills are better than gray ones. And more expensive. This is not true or accurate. Yes, there are drills that turn black from steaming or something else, but in general, black drills can also be of poor quality. Do not blindly trust such schemes.
These are instruments that have undergone a tempering procedure. Tempering the metal means heating it just below the maximum permissible value, and then gradually cooling it in air to a temperature environment. Tempering allows you to relieve the internal stresses of the drill material and improve its strength.
These drills are considered the best supreme instruments, and of course, they are expensive. Actually, the shade of the drill is obtained by adding titanium to the composition. This material reduces the friction of the drill on the surface, which greatly increases its survivability.
When choosing a drill of one type or another, keep in mind how long you expect it to last and what quality of holes you expect.
The more often and more intensely you drill into metal, the more expensive drills will be suitable for the job. As we have already said, it is better to buy one expensive drill than to use 10 of the cheapest ones for professional work. There will be little pleasure from the work; the drilling itself will take more time and effort.
Purchasing cheap tools saves money, but they have to be changed more often, and they are more suitable for one-time or infrequent work with medium force and malleable metal.
Drills are produced in a fairly wide range of sizes, so to understand this we offer the following classification.
So, drills are:
This symbols, containing all necessary information about a specific instrument. They are not applied to all products.
For example, on small drills up to 2 mm, special marks are not applied.
For drills with a diameter of up to 3 mm, indicate what steel is used and the size cross section tool.
And for tools larger than 3 mm, information is added not only about the grade used in the production of steel, but also the diameter, as well as the manufacturer’s logo.
In addition, by the digital and letter designation on the drills, you can determine whether the material contains additional substances, such as cobalt (K), titanium, molybdenum (M).
If the marking contains the letter “P”, then the drill is made of high-speed steel. IN international designation– HSS (high speed steel).
Markings are located on the drill shank.
A number of manufacturers provide even more detailed information in the labeling, for example:
However, on drills manufactured abroad, the markings differ from GOST, and in general they are carried out in the Latin alphabet. Let's look at what designations such companies leave.
products made of carbon and alloy steels with a strength of no more than 900 N/mm2;
blanks made of metal alloys containing aluminum, graphite, copper, nickel, zinc (bronze, brass, cupronickel, etc.);
gray and ductile iron;
This designation refers to drills that can work with metals with a strength of up to 1100 N/mm2. Such metals, in particular, can be the following steels:
If such a designation is present on metal drills, this means that titanium-aluminum-nitride coating is applied to their working part. This coating significantly increases the resistance of drills not only to corrosion, but also to wear, which helps to increase their service life. Tools with this marking can also be used for processing metals and alloys with strength reaching up to 1100 N/mm2. Manufacturers recommend using the following types of drills for processing:
Another detail thanks to which you can choose a drill is the company name. There are quite a few of them on the market, but we would like to focus only on the three most interesting from our point of view. Bosch manufacturer with excellent equipment, great experts in the industry.
Unlike other brand tools, it is the Praktika equipment that is analyzed in detail. Each group of drills from this manufacturer has detailed descriptions and recommendations for their use. If you are not familiar with drills, then the “Practice” instructions will greatly help with this.
VIRA may not be the most famous brand equipment, but it is worth paying attention to. In the drill category, VIRA represents several levels of quality and value.
These are tools made of high-carbon high-speed steel with titanium-nitride coating. The coating not only reduces drill friction, but also protects it from overheating and improves chip removal.
Drill suitable for efficient work with alloyed and unalloyed steel, cast iron, plexiglass, cupronickel, copper, bronze.
To perform simpler tasks, VIRA introduces . One set allows you to work with wood, metal and stone.
