Which Is Better Punch Or Hammer Drill
Instructions: impact drill or hammer drill How to use a hammer drill or hammer drill: instructions and advice on how to choose a hammer drill and what it is.
How to choose an impact drill for stone work
Most drills have a three-jaw chuck that can be used with standard drills for metal, plastic, wood (conventional, non-hammer drilling). Working with a stone requires special tools.
The stone drill features recessed notches, a hardened tip and solid inserts connected to the cutting ends. Such drills are usually 15 cm in length, however, there are specimens and shorter than 8 and 10 cm.The presence of a flat, pointed tip makes it possible to clearly identify this type of drill at a glance.
Cordless hammer drill works cordless
Cordless 18-volt impact drills are widespread and provide enough power for concrete applications. In terms of functionality, this type of tool is extremely close to standard 18 volt drills, but it has an impact mode. It can also be switched to conventional drilling for non-stone tasks. Cordless tools are usually much bulkier and heavier than conventional tools, which makes them less convenient to use.
Impact drill for various materials
Many people these days are moving away from traditional corded drills and prefer modern, cordless ones. However, this approach does not always justify itself. First, the cordless tool has a stable electrical supply and will never stop in the middle of a workflow. Also, it usually has a greater power than cordless drills and, accordingly, the area of its application is wider.
The hammer drill typically runs at higher rpm (1100-3000 rpm) than conventional corded options (up to 850 rpm). The extra speed makes it more suitable for special jobs. While a master may have a variety of cordless drills, most of them set the hammer drill to normal drilling and use grinding drums, wire brushes and polishers as a drive.
The hammer drill can also be used with hole saws in this mode. And when performing such tasks (reaming holes), compared to cordless or compact corded drills, the large size makes it more stable, easier to control, which ensures better performance.
Instructions: impact drill or hammer drill
Added by: Andrey on November 16
There are many different tools to be found on the market today, so it can be difficult to choose the right tool for a particular job. What is an impact drill, every master knows. This is a special type of tool for punching any building materials.
Impact drills look like ordinary drills that anyone who does their own repairs have, but their design includes a special mechanism that causes the drill to make pushing, hammer-like movements during operation. This effect is essential for working with brick, concrete and other stone materials.
When should you use an impact drill?
This type of power tool usually has a switch that allows you to select between drilling mode and hammer drilling mode. When you work in conventional drilling mode, the hammer drill can be used for any task that would normally be done with a simple drill. In hammer drilling mode, such a tool is used when working with stone surfaces. So, if the mode is selected correctly, an impact drill can punch a hole in just about any material. If during the repair it is planned to drill stone surfaces, you should have a hammer drilling tool.
This type of power tool is constantly used by professionals to install switchboards and other pieces of equipment on brick and concrete walls. Craftsmen use them for many jobs, mainly when hanging shelves and cabinets from stone walls.
Impact drill or hammer drill?
If you suddenly need to drill a hole with a diameter of more than 1.5 cm, or you work with a material that is much harder than concrete, then the power of the above device may not be enough. In such cases, a puncher will help you.
While the hammer drill works by rotating the ribbed engaging plates, the hammer drill works on the principle of a real hammer piston. Therefore, the rock drill is easier to hold in the hand while still providing more power output. However, this tool is not without its drawbacks, it is much more cumbersome than the first and at the same time can be used only for stone materials.
The rotary hammer drills have a special SDS chuck into which only special SDS drills and other accessories can be inserted. However, they also have switches that allow you to turn off the rotation mode for crushing stone material and other similar tasks.
Differences between impact drill and hammer drill
Once you have learned the basic properties of both tools, it is easier to understand how one differs from the other.
Impact drill or hammer drill what to choose for the home?
People who are far from construction believe that a drill and a hammer drill are tools designed for drilling holes that can easily replace each other. However, each of them has its own unique functions that allow you to perform operations that are not available to the other. What are the differences? What is more useful at home?
Impact drill functions
Thanks to a variety of drills, holes can be made in various materials:
- For drilling wood, take drills for metal or wood, in some cases feather;
- If necessary, make a hole in the metal, use durable drills of a special design;
- Lance-shaped, designed for working with glass and ceramics, help to drill neat holes in the tile without damaging them;
- Castellated help in cases when it is required to make holes of large diameter;
- Drills with a victorious tip allow you to work with hard materials (brick and concrete).
In addition to the usual ones, you can use additional attachments. They can significantly expand the functionality of the device.
With the help of a grinding wheel attachment, you can quickly and efficiently grind the surface. A steel wire brush attachment will help clean any metal surface. For rough processing, use a twisted wire nozzle, and a better one is made with a corrugated brush.
If you purchase a special attachment, the drill can act as a mixer: it is able to quickly and thoroughly mix the solution.
In addition, a drill with the impact mechanism disabled replaces the screwdriver. With its help, you can screw in and unscrew screws, self-tapping screws or screws, assemble furniture, hang shelves at home and carry out other operations.
The main differences are:
- Performance. According to this indicator, the hammer drill is many times superior to an impact drill, since the device has a powerful impact force and a weight greater than that of a drill, which contributes to its increase. If we take 2 devices with the same power, then the hole made with a drill will be 1.5 times smaller than the hole made with a puncher. The difference will be even more noticeable if you choose a crown bit instead of a regular drill.
- Bore mount. The drill has a chuck with a cam chuck, which does not provide adequate retention of the drill, which can prevent it from turning. A new type of cartridge is used to mount the drill in the hammer drill. It holds the drill better and provides free movement. The drill replacement process takes a few seconds.
- Appointment of the device. The main characteristic of a drill is the amount of torque, while the work of a hammer drill is assessed by its impact power. Therefore, it is incorrect to compare these tools, they have different purposes initially.
- Processing precision. The hammer drill is designed for working with hard materials, and drilling in metal or wood with this tool can be undesirable, the result may be of poor quality and, most likely, the hole will not exactly match the intended diameter. If you need to make a thin hole of a certain size, you should choose a drill.
- Life time. In the hammer drill, the internal parts are pneumatically protected from shock loads and vibrations during tool operation. In addition, a protective sleeve is installed in the device, which protects it from damage if the drill gets stuck in the hole or stumbles upon a reinforcing mesh in concrete.
The hammer hammer mechanism can be electro-pneumatic or electromechanical. The former is more common, since it provides maximum impact force with relatively low power.
There are 2 options for the execution of the electro-pneumatic percussion mechanism: in light devices, an oscillating bearing is used, in heavy or medium-sized ones, a crank mechanism.
When the tool is turned on, the electric motor starts to rotate, the movement is transmitted to the inner sleeve of the oscillating bearing. At this time, the outer sleeve starts to vibrate. The air between the ram and the piston sets the ram in motion, it oscillates in time with the piston, striking the striker.
The striker hits the drill, which is fixed in the chuck.
The advantages of using a hammer drill are lower recoil and higher working speed.
With a puncher you can:
- Make holes in hard materials (brick, artificial and natural stone, blocks, concrete). Core drill is used when large diameter holes are required.
- Remove plaster, brick or tile from walls. To do this, you need to choose a chisel from the nozzles.
- Perform chipping of the walls of the house. Need a lance nozzle.
The disadvantage of the tool can be called the fact that for some operations, adapters for nozzles may be required, this increases the already considerable weight of the device and makes it less convenient, lengthening the entire structure.
The hammer drill is a professional tool with a thoughtful and reliable design. It allows you to carry out heavy work at high speed. When self-repairing a house, the presence of such a powerful device is most often not required, therefore, an impact drill is often used for household purposes.
Working attachments used and type of fixation
Another parameter that distinguishes the devices from each other is the working tool and the type of fixation of the element. Most often exploited:
In drills, as a rule, a working element is used in the form of a drill, on which a soldering from an alloy is applied. This option is relevant for concrete surfaces. It should be noted that the element is fastened to a special clamp in both versions. But their design is different in the devices. Rotary hammers involve the use of a number of systems that allow you to quickly change the working element. These are, in particular, SDS:
For fixing, special grooves are used with a special configuration. It should also be said about the degree of freedom in relation to the clamp in the direction of the axis. This approach helps to reduce the workload during work.
A standard drill is used only if the device is equipped with a special adapter or a chuck with a cam mechanism is installed instead of the traditional one. The latch facilitates quick and easy clamp changes. The standard model is included with the device. When a cam variation is used, a structure is formed, which consists of two clamps connected in series with each other, and one auxiliary. But in this case, beating occurs during the operation of the apparatus, and the mount is not sufficiently rigid.
From the above, it follows that rotary hammers are used to solve a wide range of tasks compared to impact drills. In addition, they benefit from power and performance. This means that this option is more relevant for performing complex operations. Drills are rational to use for solving small tasks.
Service life and reliability
The period of use of instruments is another important parameter that determines the further purchase. An impact drill such as the Bosch EasyImpact 550 has a shorter operating time than a hammer drill. The advantage is that the pneumatics reduces vibrations, therefore, the working conditions will be optimal for the entire structure of the apparatus. A special coupling helps to eliminate breakdowns when the drill is jammed. For example, if the element hit the reinforcement.
The working parts of the drill quickly become unusable, which is due to the acting load on the gears. As a result, vibration affects with great strength and rigidity, negatively affecting the tool components, disabling the elements.
Difference in working conditions
Especially significant differences are seen in the operating conditions of the tools. With the same parameters as a hammer drill, drilling and hammer drilling is easier, for example, with the DeWalt D25501K model. To provide optimal power, force is required on the drill equal to 9-16 kg, and on the hammer drill 5. A lower pressure value also reduces vibration on the hands, which is convenient for the user.
The hammer drill is more convenient because the structure of the tool contains an air cushion with a softening characteristic. Due to this element, the docking of the tip of the striker and the piston with each other does not occur. This feature makes the hammer drill more practical in comparison with the drill.
Differences in striking mechanisms
The question is not what is more practical, but for what purpose the device is needed. The impact mechanism of the apparatus determines the main distinctive features. Drills stand out for their simpler design. The body includes two ratchets, where one connects to the body and the other connects to the rotating chuck. When the shock option is turned off, these elements cease to contact each other, which is due to the presence of a special stopper.
When turned on, they interact with each other. This is due to the fact that the stopper is removed, and when the drill is pressed against the material, contact occurs. Simultaneously, the working element and the clamp for it are in motion, which is axial reciprocating.
Perforators are distinguished by a more complex design, which is made in the form of a knot. The mechanism exists in two variations: electromechanical and electro-pneumatic. The second is used more often than the first, due to its better performance.
The bottom line is that the engine rotates, which is due to the KShM (crank-connecting rod) converter mechanism. A special swinging assembly in the form of a sphere is also used. This leads to the fact that the cylindrical rod acquires a reciprocating motion. A space is formed between this element and the ram, in which a certain force acts, which leads to an increase in the movement of the latter. As a result, the element gives off energy to the working tool.
In other words, the mechanism of hammer drills is mechanics, and hammer drills are pneumatics. Due to this, the amplitude and force indicators differ, respectively. With equal power, the functionality of the former will be lower compared to the latter.
If you plan to drill holes in stone surfaces, then it is more advisable to choose a hammer drill. The productivity of these devices is higher than that of drills, which is explained by the impact force indicator. For light models, the value is 1.4-1.7 J, and for heavy models, 19-26 J. Working with drills, the impact is determined by the force of pressing the apparatus to the surface. But even if the exponent is high, the value will be small because the amplitude of the axial element is low. As a rule, the parameter is equal to the height of the gear tooth. The efficiency of the punch is also higher due to the mass of the device. Weight contributes to an increase in this parameter.
The hole made with a drill will be 1.5 times smaller than that made with a punch. When using a crown, the difference becomes even greater. In addition, professional rotary hammers help to solve the problem much faster. The result also depends on the version of the used working element, the power of the apparatus. But the hole made by the hammer drill will always be larger.
How an impact drill differs from a hammer drill: 7 main criteria
When it is necessary to carry out a series of repairs, it is recommended to use a hammer drill or impact drill. The principle of operation of the devices is similar, but the number of differences is the same as the general characteristics. Therefore, before proceeding with the solution of the task, you need to decide which is better: a drill or a perforator.
Behind the external similarity lies a number of differences that determine the capabilities of each of these tools. The design of the devices does not allow them to be interchangeable. As a result, operational restrictions are imposed. Therefore, what is the difference between these two instruments, below.
Working conditions. Performance
At the same power of the tools, the hole diameter that can be obtained with a hammer drill is about 1.5 times the diameter that can be obtained with an impact drill. The difference increases even more if a core bit is used for drilling.
What is the difference between an impact drill and a hammer drill
The hammer drill tool used for drilling concrete walls is most often a winnowing drill.
For a hammer drill and a drill, drills and drills are mounted in cartridges, however, their design is very different for a hammer drill and a drill. For a quick tool change, the rock drills use the SDS-plus, SDS-max and SDS-top tool clamping system (depending on the shank diameter, for more details about the hammer drill chuck, see the article Punch). The fixation in the chuck takes place using specially shaped grooves.
In a hammer drill, the tool has a certain degree of freedom with respect to the chuck in the axial direction, which makes it possible to reduce the load on the hammer during impacts.
In order to use a conventional drill in a hammer drill, you must either use a special adapter, or change the chuck to a cam one. In a number of models, thanks to a special fastening system, the change of chucks is easy and quick, while the chuck for a conventional drill must be included in the hammer drill kit. When using an adapter, a structure is obtained from two series-connected cartridges. SDS and three-cam. The disadvantage of this option is the lack of sufficient rigidity of the drill attachment and its runout during rotation.
The hammer drill is used only for drilling holes and works in two modes: drilling without impact and drilling with impact.
The rotational motion of the electric motor is converted by means of a crank mechanism or a special swinging spherical bearing into a reciprocating piston motion. Under the action of compression in the cavity between the piston and the ram, the latter accelerates and transfers its energy to the tool through the hammer. Drill, chisel, drill, crown, etc. For more information about the punch device, see the article Punch device.
The impact mechanism of the drill is much simpler. It consists of two ratchets, one of which is connected to the drill body, the other. With a rotating chuck. When the impact function is disabled, the ratchets do not contact each other due to the stopper located between them. When the drill is switched to the impact position, the stopper is removed and when the drill is pressed against the material, the ratchets begin to contact, skipping over each other. In this case, the chuck and the drill are given an axial reciprocating motion.
The difference in the design of percussion mechanisms determines a significant difference in the technical and operational characteristics of the hammer drill and the hammer drill.
Which is better: hammer drill or hammer drill?
This question is often asked by inexperienced people who purchase a tool for the home. In principle, professionals do not have such doubts, since they certainly know that behind the external similarity there is a great difference that predetermines the capabilities of these two tools.
The drill is originally intended for drilling holes in materials of low density. In wood, plastic, soft metals. The addition of the percussion function has significantly expanded the capabilities of this tool, allowing everything else to be easily drilled into masonry and structures made of low-grade concrete. At the same time, like hammerless drills, with the proper equipment, they are able to work with fasteners. For all their versatility, the drills have rather modest dimensions and are much cheaper than perforators. Thus, the main reasons for the popularity of impact drills among domestic consumers include their versatility, compactness and affordability.
Accordingly, rock drills are heavier and more expensive. If you compare tools with identical power, the weight and price advantage of the hammer drills will be obvious. For example, a thousand-watt two-speed drill Makita HP 2071 weighs 2.4 kg and costs about 5000 rubles. With its help, you can drill holes with a diameter of up to 40 mm in wood, up to 16 mm in steel, and by connecting the impact function, drill into concrete with a 20 mm drill.
For a perforator similar in power M akita HR 4010 C will have to lay out three times more and weighs 6.3 kg. In terms of functionality, a hammer drill is significantly inferior to a drill, since it only hammers or drills with a blow, and these two modes are unacceptable for making holes in wood and metals. But in terms of drilling concrete, the designated perforator is out of competition, since it will pull not only a large-diameter drill (up to 40 mm), but also a drill bit (up to 105 mm). In addition, this tool will easily replace a jackhammer and will greatly facilitate the work of installing niches and openings, laying communications, chipping off old ceramic tiles, etc. Of course, such a hammer drill is intended exclusively for professionals and is unlikely to be useful in everyday life.
However, among the hammer drills there are light weights: for example, the Makita HR 1830 weighs only 1.7 kg, and is inferior in price to the Makita HP 2071 hammer drill. Both of these tools work in the mode of drilling and hammer drilling. Over, with the help of a drill, you can arrange technical holes of a much larger diameter in concrete (without taking into account hardness), and in wood, and in steel.
A natural question arises: what is the difference then? First of all, the difference in power consumption: for the compared hammer drill, the power consumption is 440 W, and for the drill 1010 W. And this is the corresponding load on the network and the cost of paying for electricity on the one hand and an indicator of performance. With another.
But the main difference lies in the purpose, in particular in the main object of the application of efforts. For a drill, drilling in concrete is an additional option, and in the hammer drilling mode, the tool works for self-destruction (more on that below). A hammer drill that easily breaks a monolith will not provide high precision drilling of holes in steel, wood and plastic. The reason for this is the design features of the percussion mechanisms of drills and perforators and the used cartridges for fixing the equipment.
In impact drills, the impact is generated mechanically. Everything is extremely simple there. Two toothed ratchets in drilling mode without impact rotate interlocking teeth, as a whole. When the impact function is turned on, the internal ratchet (located closer to the engine) moves back, and the external one begins to count its teeth with its own. As a result, impact energy is not generated as such: the impact force is predetermined by the height of the teeth and the pressure exerted on the tool by the user, and the frequency of impacts is the number of teeth and the rotation speed.
This is where the self-destruction mentioned above comes from. No matter how strong and wear-resistant the material used for the manufacture of ratchets is, sooner or later the teeth will merge and the impact mechanism will finally fail.
The nature of the impact in rock drills is completely different. The crank mechanism converts the rotation from the engine into reciprocating movements imparted to the piston. That, in turn, activates the striker, but not directly, but through an air gap, which reduces the load on the piston, thereby contributing to the durability of the tool as a whole, and reduces recoil. Such an impact mechanism is three times more effective and, of course, more reliable than a drill ratchet. In the presented model range of Makita rotary hammers, the impact energy ranges from 1.3 to 19.7 J (models HR 1830 and HR 5210 C, respectively).
Some conclusions can already be drawn from the above. For example, that if intensive work is coming up on drilling concrete, then the impact drill will die pretty soon, and the heavy one will not overcome at all. And it is true. But do not be fascinated also by the versatility of three-mode rotary hammers, which are declared by manufacturers as jack of all trades. As a rule, these are instruments of light (up to 4 kg) and medium (5-8 kg) class. These rock drills, and heavy ones too, are equipped with SDS keyless chucks. Plus and SDS. Max, designed exclusively for special drill bits, blades, etc. Whose shanks have a well-defined shape (the presence of grooves and their number). Consumables for rotary hammer drills are much more expensive than conventional drills, and the use of the latter is not possible due to the specifics of the cartridges. To expand the capabilities of rotary hammers, manufacturers quite often complement their models with additional cam chucks, which are mounted in standard SDS-type holders by means of special adapters. At the same time, the tool becomes more cumbersome, and the runout of the chuck increases significantly, which does not benefit the quality. Replacement chucks are an alternative for more accurate drilling. In this case, the main SDS chuck can be easily dismantled, and in its place, thanks to the adapted tip, a conventional cam chuck is installed. For cylindrical drills. An example puncher Makita HR 2811 FT with removable SDS chuck. Plus. It should be noted that such an arrangement is not so common yet and significantly affects the price of the instrument.
So, answering the first question, we have already noted its incorrectness. Both drills and rotary hammers are equally good, but only in the area for which they are intended. The hammer drill is ideal for drilling holes in wood, metals, plastics, brick and lightweight concrete. In addition, it can be used to work with fasteners, and at low speeds as a mixer. The hammer drill is preferable where you often have to drill and hammer concrete (and reinforced concrete) of varying degrees of density, but it will not provide precision drilling in metals and wood. Rock drills, which are equivalent in power to impact drills, are significantly superior in weight and cost. When working with concrete, rock drills are much more reliable, practical and more durable than impact drills. The versatility of impact drills will come in handy in a domestic environment, and hammer drills are more professional. But if you live in a building made of glass and concrete, then, in addition to a hammer drill, it will be useful to have a hammer drill, if not the most expensive and powerful, at hand.