How to choose and use screwdriver bits for cutting metal?
- Features of the
- Advantages and disadvantages
- How to choose
- Recommendations for use
Using a special attachment, the screwdriver can be modified into a tool for cutting metal products. It is quite convenient, high quality and economical. This method is a very effective alternative to special metal cutting tools. However, in order for the result after working with a screwdriver with such a nozzle to really be of excellent quality, you need to choose the right nozzles.
How to choose
- Don’t ignore the domestically produced tips. In terms of quality, they are not at all inferior to foreign products, and at a price they can be much more profitable.
- Do not buy attachments hand-held. The marriage may not be noticeable at first glance, but in the future, its presence may result in a serious problem.
- Make sure that the mechanism is suitable in all parameters for your particular instrument.
When choosing a milling cutter for working with a metal screwdriver, you should also take into account the purpose of the mechanism and choose a product that matches the specifics of the work. You can divide the nozzles into the following types:
- device for cutting thin sheet metal;
- a sharpening product for regenerating a cutting metal edge;
- attachment for polishing, grinding metal coating.
The main difference between screwdriver bits is the thickness of the metal being cut. Other technical properties are also important. Modern building sales departments, as well as Internet sites, offer many models of metal cutting attachments, thanks to which the tool produces smooth and neat cuts. For example, the following attachments are the most common models:
- “Cricket”.
- “Steel beaver”.
- Sparky NP 1,8L.
- EDMA NIBBLEX.
- ACKO YT-160A.
Particular attention should be paid to the HPM “Cricket” attachment using the example of the “Enkor 14210” model. The fixture can be used for metal sheets up to 1.6 mm thick. If it is copper, aluminum or polymer material, then the mechanism will also take a 2 mm blade. The product is put into operation by a cartridge. With the help of this product it is possible to make any kind of cuts. The strength of the attachment is given by the tool steel, which is used in the manufacture, due to this, the device has a long service life. Also, the advantages of the model include low noise and mechanical losses. It is quite suitable for artistic cutting and making large-diameter holes on metal.
The Steel Beaver attachment is also worth mentioning. It is a kind of steel scissors. The model is more suitable for metal tiles and corrugated board. The advantage of the nozzle is its property not to burn the protective layer of the metal product, due to which the coating retains its anti-corrosion qualities. The fixture is used for steel (up to 1.8 mm), stainless steel (1.2 mm), copper and aluminum (2 mm). Minimum cutting radius. 12 mm.
The Sparky NP 1,8L device allows you to make both linear and radial cuts. Differs in high quality edging. Perfect for metal tiles.
Features of the
When asked whether it is possible to drill metal with a screwdriver, professionals give a positive answer. However, it is worth knowing that cutting for metal with a screwdriver is possible only at home and when working with an insignificant volume. For example, it is easier to bring multiple attachments to a proposed project than one heavy power tool. For professional work in the conditions of industrial processing of metal sheets of large thickness, attachments for a screwdriver will not replace a specialized tool such as a grinder.
A device that turns a screwdriver into a metal-cutting device is, in fact, a punch. It evenly penetrates the metal sheet by means of multiple reciprocating movements. In the course of work, the tool acts on the sheet in a point, due to which the coating retains its performance as much as possible.
Thanks to a special attachment, the master can work with thin metal and sheet metal with a width of no more than 2 mm. The product consists of two cutting parts, one of which is covered with a handle. If the blade is dull, then the handle can be adapted to it, and the work can be continued with the sharp part. According to some masters, this method is even faster than, for example, when working with a grinder. The cut edges are not deformed, the convenience is created by the absence of sparks when cutting.
Advantages and disadvantages
Cutting metal with a screwdriver has a lot of advantages.
- The result of working with a screwdriver is a high-quality and even cut.
- Profitability. When purchasing a nozzle, there is no need to make a purchase of additional consumables.
- Greater device performance.
- The versatility of such attachments.
- Due to the presence of a special handle, the workflow is easy, convenient, and efficient.
- Some models are applicable to any screwdriver and drill, electric or pneumatic.
- Special attachments are quite easy to maintain.
- This method makes it possible to carry out cuts in almost any configuration.
The disadvantages of this method of cutting metal include some inconvenience in work for novice craftsmen. First you need to adapt to the process, acquire some skill, even art. Experienced craftsmen will not need this. they will easily cope with the task. Another disadvantage of the product is the difficulty when working on the roof, since both hands are used when cutting metal.
Recommendations for use
Turning to a screwdriver as a tool for cutting metal, it is worth considering some of the features of working with it. When using this method for the first time, heed the recommendations of experts.
- Before work, make several cuts on unnecessary metal blades in order to adapt and adapt to cutting and avoid mistakes during the main work.
- Hold the drill or screwdriver with both hands, this will ensure a high-quality and even cut of the desired shape.
- Make sure that nozzles and cutters are stored in dry rooms where there are no conditions for metal oxidation.
For how to use the sheet metal cutter, see the following video.
Is it possible to drill with a screwdriver
If you have a model that has two modes of operation. drilling and a screwdriver. Usually professional models have such capabilities, for example Makita DF347DWE. It is not necessary to use a model that does not have a drilling mode, the engine may burn out, since drilling requires higher revolutions to reduce the load.
How to use a screwdriver? 5 basic rules
The screwdriver has become one of the most popular when working on interior decoration. This is explained by the widespread use of wall panels, suspended ceiling ceilings, and the use of wooden battens as cladding material. These works require the massive use of screws and a screwdriver to screw them into the surface. Therefore, the issue of correct operation of the device so that it works for a long time and reliably is relevant. In the article we will talk about cordless screwdrivers, as the most popular type of this tool.
Good to know
How to store a screwdriver
Better separate from the battery. If you have a model with a nickel-cadmium battery, then before ending work and disconnecting the battery, it must be completely discharged. After removing the battery, it must be charged. Remember that Ni-Cd has a high self-discharge current, therefore, during long-term storage, it needs periodic recharging.
How to use a screwdriver correctly and safely
Working with this tool is intuitive. But you need to know certain subtleties that reduce the risk of injury and tool breakage. So, how to screw a self-tapping screw with a screwdriver safely:
Read the instructions carefully BEFORE using the instrument for the first time, and not after something unpleasant has happened.
Correctly select the maximum torque at which the safety “ratchet” will work and the force will not be transmitted to the shaft. The tool is of course designed for maximum effort. But, firstly, constant work at the maximum reduces the service life. Secondly, the likelihood that the screwdriver can pull out of the hands increases. Thirdly, by learning how to correctly determine the maximum torque, you will reduce the likelihood of damage to the surfaces where you screw the screws. This is especially true for polished and fragile surfaces. For example, in the Bosch GSR 10.8 model, the maximum torque is 30 Nm, but you can also set 5 Nm.
We choose the right mode of operation. It is not necessary to drill in the screwdriver mode, and even more so to tighten the screws in the drilling mode, where the speed is higher. The tool may simply be snatched from your hands.
Do not forget to control the direction of rotation. We tighten the screw. the cartridge should rotate clockwise, we unscrew it. against.
Do not change any cutting mode settings on the fly! This threatens to break the screwdriver and is unsafe.
Above, we talked about the rules of safe work relating directly to the screwdriver. Now about the general organization of work with this tool:
- Work only with protective goggles and preferably with protective gloves, especially if you are drilling materials that can crack and “shoot” sharp fragments.
- Before drilling, make sure that there are no electrical cables and other utilities in the area.
- When tightening and unscrewing screws, as well as drilling small holes in diameter, do not lean on the screwdriver. The screw or drill may break and injure you.
- Household and professional screwdriver models have different continuous operation times. In any case, it is! And it’s not worth bringing the instrument to a hot state.
- After work, you need to disconnect the battery, remove the attachment, wipe the tool from dust.
Equipment installation
The screwdriver can be equipped with drills or nozzles for twisting and unscrewing screws. When the desired bit is selected, it is necessary to rotate the chuck sleeve counterclockwise until its jaws are separated by a distance sufficient to insert the drill shank or screw bits between them. Then the clamp is made in the reverse order. There are two types of cartridges:
- the clamp is made without a key, but only by rotating the cartridge case by hand;
- requiring pressure with a special key, which is inserted into the recess in the chuck and rotates it, leaning against the toothed rim, for example, as in the Dnipro-M 1/2 ″ x20 gear chuck.
How to remove a chuck from a screwdriver, for example, to lubricate it or replace it if it does not fix the nozzle poorly. In modern models, the chucks are screwed onto the shaft and, for reliability, are locked with a screw with a left-hand thread. This is how the cartridges are attached in Makita, Bosch, etc. screwdrivers. It is necessary to unscrew the screw and unscrew the cartridge, turning counterclockwise. Detailed instructions on how to do this are available in the documentation for the tool.
Do I need to lubricate the screwdriver
This tool has a gearbox and requires lubrication, such as ELF MULTI MOS. The frequency depends on the model and the intensity of use. The following signs will indicate that your tool needs lubrication:
- unpleasant “hysterical” sound;
- the cartridge is difficult to rotate by hand.
You can lubricate with lithol, manol, silicone or Teflon grease.
Is it possible to interfere with the solution with a screwdriver
It is possible, only you need a special attachment-nozzle. And of course, neatness, so as not to accidentally fill the screwdriver with a solution.
Can I be used as a drill?
As mentioned above, basically a screwdriver is used for such things to unscrew or twist something. When using a screwdriver as a drill, carefully read the instructions. is this possible in the instructions from the manufacturer.
If, nevertheless, it is possible to use a screwdriver as a drill in order to drill and make a hole, for example, in a wooden or plastic product, then it is recommended to put a small and even piece of wood under this or that object. So your hole will be made better and will prevent cracks and chips from appearing.
If you use metal in your work, then there are some simple rules to follow. Before you start drilling, the hole must be tilted to prevent the drill from slipping on the metal. Select the drilling mode and get to work. But here we must not forget that when drilling for metal, the drill may break. To prevent this, it is not recommended to press hard on the tool. If it happens that the drill gets stuck, then switch the screwdriver to the unscrewing mode, and calmly unscrew the drill.
But nevertheless, it is recommended for these purposes to purchase a special model of a drill-screwdriver, which can also be both mains-powered and battery-powered.
Device and principle of operation
The screwdriver can be used in various fields of activity and for various actions, for example, in everyday life, during construction, assembling and disassembling furniture, in various workshops and where many fasteners are used. They can drill, thread, twist and unscrew fasteners. Let’s get acquainted with the device and the principle of operation of such a mechanism.
All screwdrivers are divided into three types:
- working from a regular network and called network;
- powered by a charged battery and called rechargeable batteries;
- powered by both mains and battery. combined option.
All screwdrivers are very similar in both external and internal structure. They consist of elements such as:
- body;
- cartridge;
- power button;
- rotation switch;
- speed regulator;
- power lock button;
- tightening force regulator.
Some models additionally have backlighting, and some lack one or another element. So, for models powered by the network, there is a power cord, while for rechargeable models there is a charge storage.
The body of a power tool consists of two parts and can be made of plastic or an alloy of various metals, but this is much less common.
Inside it are:
- electric motor;
- pay;
- capacitor;
- reducer;
- clutch.
The principle of operation of all screwdrivers is similar to each other. the electric motor is set in rotary motion with the help of consumed electricity, which transfers the force by means of the gearbox and the shaft from the motor to the existing nozzle installed in the chuck, and the nozzle already performs the process of drilling, screwing in or unscrewing the fasteners. For network screwdrivers, the motor uses an alternating voltage of the mains 200 V, and in cordless ones. a constant voltage of 3.5 V to 36 V.
Replacing the nozzle is also quite easy and simple. In this case, the screwdriver can have a quick-release chuck or a turnkey.
Changing the nozzle with a quick-release chuck:
- first you need to choose a drill for the work that you plan to perform, or a bit, taking into account the size of the head, the type of slot;
- the cartridge is unscrewed counterclockwise;
- install the selected nozzle;
- rotating the cartridge case in the clockwise direction, the nozzle is clamped.
Changing the nozzle with a turnkey chuck:
- take a key and insert it into a special recess;
- untwist the cartridge;
- insert a new nozzle;
- rotate the key in the clockwise direction, securing the nozzle.
How to prepare for work?
The first thing you will need to do in order to get started is to remove the screwdriver from the case or suitcase and check for visible damage, chips or cracks. If you notice that something is wrong with the tool, then in no case should you use it, as it may be unsafe. Be sure to make sure that the battery of the screwdriver is charged, or the screwdriver itself is connected to the mains. When these conditions are met, the screwdriver is turned on to idle and check the correspondence of the rotation of the nozzle and the thread on the fastener. If all the conditions are met, then you can safely start work.
Be sure to select and properly fix the bit or drill depending on where and how you are going to work. How to fix them, we mentioned above when we talked about changing the nozzle.
When using the device directly, you must also follow a number of simple rules and requirements.
Pay close attention to the screwdriver itself. There is a special scale on it, which can be rotated to regulate the power of the instrument. When you turn the dial, set the mode you need, focusing on what kind of work you are currently doing.
Modes:
- twisting;
- unscrewing;
- blocking.
Switching between these tool capabilities is fairly easy and straightforward. It is only necessary to hold the screwdriver by the handle located above the battery. Most often, the handle is covered with a material that is rubberized. That is why such a machined handle is safe to work with and guarantees that the screwdriver will not fall out of your hand while working. For greater reliability, the tool is fastened to the hand with a strap.
How to use a screwdriver correctly?
- Device and principle of operation
- How to prepare for work?
- Use cases
- Twisting wires
- Rebar tying
- Features of drilling concrete
- Can I be used as a drill?
- Useful tips for use
Many craftsmen prefer to use a screwdriver instead of a screwdriver. It allows you to save time and get the job done quickly and efficiently. Let’s get acquainted with the principles of operation and the device of this tool, find out the scope of its application and the rules of operation, and also give some useful tips.
Twisting wires
A screwdriver with a specific nozzle is excellent for twisting the separated ends of the wires. Usually twisting is done with pliers, but those who wish can use a screwdriver, using it for this purpose. The main thing is to correctly perform this tricky procedure.
Rebar tying
The screwdriver can be used to knit reinforcement using steel wire. This is widespread in construction, when various reinforced concrete structures of houses and foundations are being erected. In order to knit, take a cordless or mains tool that has a hook attachment.
Use cases
The correct use of a screwdriver is its use according to the instructions or the established documentation. According to these documents, the main area of use is directly the ability to screw in and out various fasteners, as well as for drilling various holes.
Depending on the capabilities, one or another model can be used both in everyday life and in the professional sphere. Household screwdrivers are cheaper and have low power, while professional models have increased power, high performance and wider functionality for use.
But some users use a screwdriver, for example, for such non-standard things as polishing a car to stir mixtures or paints, for sanding various surfaces, for twisting wires, tying fittings and even for drilling holes in ice.
Features of drilling concrete
As noted above, the screwdriver can be used in different fields and in different ways. Electric screwdrivers can drill wood, concrete and many other materials. Carefully read the instructions for using a particular model, since it is there that it is written there, for which materials it can be used for drilling.
Very powerful drills are used for drilling concrete. Most often, such tools work in percussion mode, but even with such a device, drilling a concrete wall is quite problematic. Therefore, for such cases, it is better to use a special diamond drill.
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Diamond drilling
If you are thinking about how to drill through a concrete slab or create a large diameter hole, then you cannot do it on your own. The most effective is diamond drilling of holes in concrete and cutting of reinforced concrete with diamond wheels, which are carried out using specialized professional equipment.
The cost of installations is quite high, and it is irrational to purchase them for a single use. Can I drill with a screwdriver? It would be wiser to invite specialists who provide their services for a very reasonable price.
Correctly selected equipment and a professional approach will help you cope with even such a difficult task as drilling concrete. Is it possible to drill with a screwdriver. If you have a model, is it possible to interfere with a screwdriver. You can get more detailed information on this topic by watching the video in this article.
Training
- Before drilling concrete, you need to prepare your existing tools. Find out if you can drill with a screwdriver? Ecommercemarket. Moscow. Input. Electronics; computers. Is it possible to drill a hole in a concrete carrier or brick wall of a panel house with a conventional drill, hammer drill or dust-free screwdriver, like. First of all, the fixing cartridge is inspected for the presence of sand or other foreign elements. if any, they must be removed without fail. For this purpose, you can use a clean, dry rag;
- The drill should go into the groove freely so that you can feel that it has entered all the way. This is a prerequisite, failure to comply with which may render the handpiece unusable. Is it possible to drill walls with a perforator at all on Saturday from what hours can you make noise in. If we are talking about a perforated drill, then it is necessary to clamp the drill as tightly as possible, in perforators the clamp is carried out automatically;
- Before drilling a concrete ceiling, you must protect your face with a respirator or plastic visor. When working with walls, the use of personal protective equipment is also desirable, although not so critical;
ETERNAL GREEN THEMES:
DeWalt DCD985M2
The difference between this screwdriver is:
- powerful impact mechanism (drilling 13/60 mm holes in concrete, 16 mm holes in stone);
- 3-speed gearbox, the speed of which is adjustable by the consumer;
- for the torque mode, you can choose 1 desired combination of 22;
- a rotational speed unit built into the tool gives additional control over the process;
- LED backlighting;
- specially designed chuck to drill a variety of materials;
- functionality (closely related to technical characteristics);
- Compatible with fasteners to drill metal / wood / stone / concrete.
Diamond drilling
This is the most effective way by which you can easily and quickly make a hole of the required diameter in a concrete wall.
To perform these works, you will need special equipment, consisting of the following elements:
- electric motor;
- a stand that is securely fixed to the base;
- drill bit.
It is not necessary to cool the drill during operation, as water is supplied to it, which not only cools the tool, but also prevents the formation of dust.
If specialists work, then together with the specified equipment they use a vacuum cleaner with which they remove dust and water.
Using Power or Electric Drill as Electric Screwdriver
Since the price of such equipment is very high, it is impractical to buy it for domestic use. If it is necessary to make a hole with a large diameter, for this you can always invite specialists.
Most popular brands
The best concrete drills for drills of foreign manufacturers:
Products are considered to be of high quality, therefore they have a high cost, especially Bosch products, which have a four-spiral design.
- Interskol;
- Bison;
- Anchor;
- Hurricane.
The drills have an average price category, and, accordingly, a short service life. Products from a Chinese manufacturer can also be of good quality, but only if they belong to the corresponding price range. During the construction of buildings and other cities of Russia, workers often use the listed brands of products.
Drill selection
This point can rightfully be considered the main one, since the quality of work and the safety of the drill itself, as well as the accuracy of work, depend on a properly selected drill. Today, there is a huge variety of different drills on the market: for working on wood, metal, concrete. The latter are distinguished by a triangular tip. For a concrete surface, it is best to use a carbide drill, for example, a victory drill. This type of drill crushes the material without tearing it, which is ideal for concrete floors.
If in the process of drilling the wall, the drill does not go forward, encountering a dense area, it is recommended to use a punch. After inserting a punch into the hole, they beat it with a hammer until it starts to move forward and softens the problem area. Then you can continue drilling.
It should be noted that without a punch, a perforator can easily cope with this kind of difficulty, however, it makes holes that exceed 13 mm in diameter. If you want to use universal drills when drilling, you need to remember that they require cooling, vibration off and are only suitable for a conventional drill.
Equipment types
Drilling begins with preparing the tools for the job. You can make holes using a screwdriver, drill or special drilling machine.
To make a hole, you need to select the appropriate equipment. For metal blanks, you need to choose a specialized tooling that is suitable for this particular material. This is due to the fact that equipment for wood, concrete or ceramic tiles has a different sharpening and shape. Tooling for metal products is marked with the letters HSS.
The working part of the tool is coated with a titanium nitride coating, which increases their strength and wear resistance. For hard steels, a different tooling is used which is designated P18. The strength of the instrument is increased when cobalt is added to its composition. Example of marking. Р6М5К5.
To drill alloy steel, drills with a carbide tip are used. With their help, you can drill any metal workpiece, however, due to the high price, this is not cost-effective.
Once the hole has been made, you can match the drill to the thread. Its diameter will depend on the previously used rig. Tapered drills can be used to make holes of different diameters in thin metal sheets.
Is it possible to drill with a victorious drill?
Any master of finishing works will say that it is unacceptable to drill metal with a tooling from a victor. Victory drills are designed for hard and, at the same time, brittle materials. These include natural stone, brick, concrete. When hitting metal, the drill will hit the surface and damage it, but there will be no hole.
How to drill with a screwdriver?
You can drill metal workpieces not only using industrial equipment or an electric drill, but also using a cordless screwdriver. This power tool is low power. Because of this, it is suitable for drilling holes of small diameter and depth.
Drilling is performed using industrial equipment and power tools. It is important to choose the right tooling, and take into account the depth and diameter of the hole. Coolant should be used to keep the rig lasting longer. You need to drill perpendicularly to avoid damage to the workpiece, tool.
Drilling with a hammer drill
The hammer drill is the most powerful tool, suitable for large volumes of work and for drilling concrete walls.
There are 2 ways this tool works: rotation and impact. For rotation, a special type of drill for a perforator for concrete is used. a drill, it comes with a victorious drill. You can distinguish what a drill looks like on concrete by a special shank, to which a special cartridge is installed.
The Pobedit tip is resistant to heavy loads. When there is a hole at the edge of the structure, it is not recommended to drill concrete with the percussion method, because chipping of the concrete structure may occur, and when working with ceramic tiles, the material will simply split.
In this case, it is better to use a diamond drill for concrete for a perforator, it has a higher hardness than a victorious one, during work it is necessary to take breaks to cool it down, drilling at high speeds is prohibited.
Drill errors
- Clothes and gloves should be in size.
Never try to hold the rotating chuck with your hand. there is a drill body for this. Otherwise, you can injure yourself. If you are using gloves. do not take “with a margin”. Mismatched gloves can also get caught in the cartridge and cause injury. Overalls should not be loose. they can be rolled up or pressed with oversleeves.
Is it possible to drill metal with a drill on concrete
Drilling metal
Drill selection
When purchasing drills, you need to keep in mind that conventional drills made of high-speed tool steel (for example, P6M5) are designed for drilling metals that do not have high hardness. To drill through hard metal, you need carbide drills. These drills can be all-carbide or have only a carbide tip.
Sometimes, before starting drilling, it is not known what hardness the metal is to be drilled. Therefore, having seen at the first moment of drilling that the drill does not penetrate into the metal, you must immediately stop drilling, otherwise the drill will be irrevocably disabled, overheating and losing its hardness. This will be evidenced by the appearance of a dark blue color on it. Before drilling metal, the hardness of which is not known, you can file it over it. If the latter does not leave traces on the metal, then the material has increased hardness.
How to drill metal
When drilling metal, the sharpness of the drill is very important, while the drill becomes blunt very quickly. The speed of bluntness of the drill depends in particular on the speed, feed force, cooling and other factors, however, no matter how hard you try, if a non-aluminum alloy is drilled, the operating time of the drill to unsatisfactory performance is measured in minutes.
Before drilling it is necessary to mark the hole by punching it in. To do this, you need to install the tip of the center punch (or dowel) in the intended center of the hole and hit it with a hammer. Punching is necessary to prevent slipping of the drill at the first moment of drilling. If the core track is not large enough to hold a large diameter drill, you should first widen the hole with a small diameter drill.
To create better drilling conditions, it is advisable to dip the tip of the drill into machine oil or drop it into the center of the punch. Oil in the drilling area helps to cool the drill and makes it easier to cut metal. The drill, which is drilled using oil, dulls less, requires less sharpening and lasts longer. A special emulsion, soapy water, and kerosene are also used as a coolant. According to some artisans, lard is a good lubricant and cooling agent. Before drilling, the rotary drill is immersed in a piece of bacon, which melts during drilling and has a lubricating and cooling effect. But still the simplest and most convenient remedy is soapy water. It does not stain, and there is soap in every home. It is enough to drop it once at the beginning of drilling and in the process. You can periodically dip the drill in soapy water.
When drilling through with a high feed, a burr (burr) is formed at the exit of the hole, to which the drill clings with its lateral incisors. As a result, a sharp blockage of the drill and its fracture or chipping of the cutter can occur, and even at this moment the drill becomes especially intensely blunt. Such stops have a negative effect on the condition of the drill. To avoid burr formation, you need to finish drilling holes in the metal at a low feed. It is also advisable to place a wooden block under the drilled part, which prevents the formation of a burr. The bar and the workpiece must be tightly pressed against each other. For greater effect, you can put not a wooden block, but a plate of the same or less hard metal, which should be tightly pressed against the drill exit.
Most often, it is necessary to drill steel, but often other metals have to be drilled, which have their own drilling characteristics. Aluminum, for example, envelops the drill, making it difficult to penetrate and widening the resulting hole. If you want to drill a precise hole in aluminum (for example, for a thread), it is imperative to use coolant and often remove the drill from the hole to clean it. Conventional gray cast iron drills relatively easily and requires no coolant or lubricant. But drilling in cast iron can be a surprise. There are ductile cast irons that need to be drilled with a carbide drill. White cast iron, the main structural constituent of which is cementite, is very hard, it requires a high strength drill.
Large holes should be drilled in stages. First you need to drill the part with a thin drill, then drill the hole to a larger diameter. For example, a 12 mm hole is best drilled in two or three steps. sequentially with drills 5, 10 and 12 mm.
Dull drills must be sharpened in a timely manner. It is best to do this with a sharpener, but you can do without it. In this case, you need to pay attention to the symmetry of the drill tip. If the sharpened edges do not converge exactly in the center, the hole drilled with such a drill will have a larger diameter, since one cutting edge will be longer than the other. The standard nose angle (angle between cutting edges) is 118 °. For drilling in aluminum, the optimum angle is 130-140 °, soft bronze and red copper 125-130 °. However, all of these metals can be drilled with a standard angle drill. Read more about sharpening a drill here.
When drilling, you need to maintain the verticality of the drill relative to the metal surface (if you do not need to drill an inclined hole). When making holes in thin sheets, this requirement is not as relevant as for thick-walled or hollow parts. Drilling pipes, for example, often results in the inlet and outlet holes being offset from each other. the larger, the larger the pipe diameter. It is quite difficult to maintain the perpendicularity of the drill by eye, so you can use homemade or purchased jigs for drilling or guides that ensure the perpendicularity of the drill.
Jigs are also needed to drill two or more holes in mating parts. The best way to ensure that the holes match. this is drilling them together. When drilling rivet holes, the complete drilling is a must. Once you have drilled the first hole, you can use it to bolt the parts together so that you can drill the rest of the holes without the fear that the parts will move relative to each other. If it is impossible or inconvenient to drill the mating parts in the assembly, then the jig or guide must be used. You should know that no matter how accurately the mating holes are marked and pored, they still will not coincide absolutely exactly, since when drilling even a punched hole, the drill will go a little to the side.
Drilling of rolled steel
Drilling holes in metal is one of the types of machining to obtain through and blind holes of the required diameter. The essence of the process consists in fixing the workpiece, marking and processing with manual or automated tools.
Drilling equipment
The type of equipment is chosen depending on the tasks. Drilling machines are radial drilling, vertical drilling, coordinate drilling. With their help, they perform:
- through and blind holes with cylindrical walls;
- polyhedral, oval and other holes;
- internal thread;
- fine finishing;
- reaming an existing hole.
Drilling at home
Questions for DIYers
How and how to drill thick metal with a drill?
Deep holes are holes whose depth is greater than 5 drill diameters. In this case, it is recommended to use a long drill with two helical channels. Channels located inside the instrument or tubes soldered to the back of the instrument are designed to drain off the cooling emulsion. It is quite difficult to drill thick metal parts with a drill; this requires a reliable stop.
How to drill metal?
How To Drill Through Metal (DIY)
The process begins with light pressure, after entering the material, the pressure is increased. To prevent the drill from slipping, the center is marked with a core. To work with materials of different hardness, for example, annealed or hardened steel, it is necessary to grind at a certain angle. The harder the steel, the dumber the sharpening angle.
At what speeds to drill metal?
The larger the drill diameter, the lower the rotational speed of the drill. When making a hole with a large diameter, work begins with a tool of a smaller diameter, and then a drill of the required size is used.
Is it possible to drill metal with a screwdriver or perforator?
Almost all models of cordless and corded screwdrivers are designed for drilling modes. This tool can be used in cases of custom production of small diameter holes (3-4 mm) in steel elements up to 4 mm thick. The hammer drill works in a shockless mode. This tool is not suitable for making holes with high dimensional accuracy or in massive parts.
How to drill with a metal crown?
Use a crown assembly with a holder and a drill. The crowns of the Zubr brand made of high-speed steel are popular. The tool allows you to obtain precise holes with smooth edges in steel sheets no more than 2 mm thick. Working with thicker metal without cooling will damage the crown.
Is it possible to drill metal with a drill on concrete?
Experts do not recommend working with a steel sheet with a drill that is not specifically designed for this purpose. It is possible to use the tool on concrete one-time in case of emergency and for sheets of small thickness and holes of small diameter.