Which rotary hammer is better than barrel or straight
The number of revolutions of the perforator has a certain value when performing specific work, but by and large this parameter does not play a significant role, especially when choosing an amateur-class tool.
Craftsmen who are professionally engaged in repair or construction, recommend choosing models with a high rotation speed for the production of small diameter holes or for working with thin walls, thin beams. If the task is to drill thick monolithic walls or logs, high speed will unnecessarily overheat the rig, which will somewhat accelerate its wear.
Rotary hammer types straight and vertical
Structurally, all rotary hammers are divided into two large groups:
- Horizontal or straight.
- Vertical or L-shaped.
Horizontal-type models are presented in a rich variety of modifications, the power of such tools does not exceed 1 kW. They have compact dimensions and low weight. If you want to find an inexpensive but good hammer drill, pay attention to models of this type, among them there are many successful versions at affordable prices.
Vertical engine models are more efficient. Due to the special design of such tools, the vibration level is reduced, a powerful electric motor is installed, respectively, more and weight. The power consumption for various models varies from 900 W to 1.5 kW, as a rule, hammer drills up to 1 kW are household. When choosing such a technique, you should follow the operating rules, especially for an amateur-class power tool. The bottom of the engine, where the vents are located, is not always equipped with a dust protection system, as a result of which there is a high probability of the ingress of abrasive particles.
Number of operating modes
Depending on the modification, this power tool can have 2, 3 or 4 operating modes:
- hammer drilling;
- rotation of the rig (used to set the blade to a comfortable position).
Dual-mode hammer drills are tools for a narrow specialization, there are models where drilling / hammer drilling or hammer drilling / chiselling are combined. Such models are purchased for a certain range of tasks or in pair with another instrument.
Three-mode. universal models for a wide range of purposes. If you need a tool for various household chores. this is the best hammer drill among analogues. The fourth mode with the rotation of the scapula is convenient, but in practice this function is not critical, you can choose a comfortable position in the drilling mode.
The method of setting the mode is always the same for models with a horizontal engine. a round knob at the top or bottom of the case. In the case of “vertical” switches, there are two types of switching: similar to the “horizontal” ones, or in the form of two separate controls. In practice, there is no significant difference between them, the user can choose what is more convenient for him.
We also recommend reading our rating of the best rotary hammers for home use and work: https://tehcovet.ru/reitingi/dly-remonta/rejting-luchshix-perforatorov.html
Which is better hammer drill or hammer drill?
When deciding to purchase a new tool, many are wondering what is more rational to buy: a hammer drill or an impact drill. There is no universal answer to this question, because everything directly depends on the features of the upcoming work.
These two tools are capable of performing the same function. drilling concrete or brick, but structurally they have little in common. The hammer drill mechanism will not provide the same performance as the hammer drill, even if its power consumption is close to 1 kW.
The principle of operation of the percussion mechanism is no less significant, if in a perforator (in most cases) it is pneumatic, then in a drill everything is arranged a little differently: the gears slide relative to each other. With regular drilling of hard materials, methodical, natural wear of parts is added to the low power of the drill.
The hammer drill, with its light weight and dimensions, is used for drilling into products made of metal, wood, plastic, ceramics or other soft materials. Unlike a hammer drill, a drill can make neat holes with very small diameters. This is a convenient and practical tool that can be rationally used for drilling concrete or brick only “on occasion”, when you need to hang a shelf or curtain.
The hammer drill, in turn, was created for working on concrete, here is an approximate list of tasks when you need to purchase such a tool:
- Installation of windows, doors, skirting boards, stretch ceilings.
- Electrical work. shaping a groove for laying cables, drilling holes for sockets.
- Fastening furniture or appliances to the wall (when the work is regular).
- Chipping off old tiles.
- Create window or door openings.
- Removal (chipping) of excess concrete, demolition of the old foundation.
With the appropriate rigging installed, the hammer drill can easily handle drilling any other material, but is more suitable for medium to large diameter holes. A specific model is chosen for certain types of work; there are also relatively universal modifications of a wide range of actions.
General classification of rock drills and their purpose
- Simple tools with mechanical shock will be useful for drilling wood and metal, for example, for drilling logs with twist drills. Concrete and brickwork should be limited to infrequent use.
- Lightweight with “pneumatics”. models with a horizontal engine and a power of no more than 700 watts. Such perforators are suitable for renovating an apartment and laying utility lines, because they easily drill concrete, brick, metal, wood.
- Average. This category includes the most powerful horizontal models with high impact force and all “vertical” rock drills with the SDS-Plus chuck. A tool of this class is suitable for intensive use, including drilling and chiselling of load-bearing walls, where concrete is very strong.
- Heavy. In terms of its parameters, this type of hammer drill is superior to all other models. They differ in increased productivity and are used mainly for chiselling, for example, creating or expanding openings of doors or windows, they are used to demolish an old foundation. The technical feature of this class is high parameters of power and impact force, large mass, SDS-Max cartridge type.
If you are deciding which perforator to choose for concrete or brick, choose a model with a pneumatic impact. It is impossible to visually determine the type of mechanism, and not every seller will give a full consultation. It is easy to understand the issue: for models with a mechanical shock at idle, vibration is felt, and the pneumatics forms a shock only under load, directly during drilling.
Type of food
Choosing a good model for home or work, the user must decide on the type of power supply: mains or battery. With network punchers, everything is very clear, the unit is connected to an outlet or extension cord, respectively, if there is no electricity, the tool will not work.
When thinking about buying a cordless hammer drill, you should be aware of all the features of this technique:
- Battery life limited.
- The second option should be chosen between the built-in and the removable battery. Even better if the battery type is Li-Ion. they are much lighter than Ni-Cd.
- Wireless models are very convenient when working on the roof, in the country or in a garage without electricity, but in terms of power they are several times inferior to network punchers.
- The acquisition will be rational in a pair with a network tool. The mobile model helps out when network connection is impossible or requires a lot of preparation, and the amount of work is small.
An excellent ratio of price, functionality and quality is demonstrated by the German Kruger rotary hammer. It is a compact device that weighs only 3.1 kg, which greatly improves the ease of use.
Despite such parameters, the Kruger hammer drill is increased in power: this indicator in the device significantly exceeds the analogues of other manufacturers and is 1400 W. A rubberized handle is also provided for the convenience of users. It provides a secure grip and does not slip while working with the device.
How to choose a good rotary hammer for home and work
A hammer drill is a unique tool, no repair or construction can do without it. There are many recommendations on how to choose the right puncher for home or work, but for you we have collected the most useful.
Almost all models of rock drills are not limited to a single mode. The devices are equipped with the functions of a drill, a jackhammer. the impact mode will help to break the old plaster, drilling combined with impact can make holes in hard surfaces, and if you need to hang a cornice or assemble furniture, you can use the simple drilling option.
In general, virtually any major home improvement requires this device. To change wiring or lay new cables, you need to grind down the walls. Hang the air conditioner or wall cabinets. you need to make holes for the supporting elements, change the plumbing. you can’t do without parsing the floor and removing the tiles. When redeveloping, it becomes necessary to demolish walls, knock out old window blocks, and replace door frames. And all these tasks are handled by the modern version of the hammer drill. And no matter what material needs to be processed, it does a great job with stone floors, metal surfaces and wooden structures.
Meet the best manufacturers: TOP 10 best rock drill manufacturers
Structurally, the tools differ in the location of the engine. They are easy to distinguish. L-shaped rock drills are called vertical (barrel), and elongated tools are called horizontal, straight or pistol. Home craftsmen often find it difficult to choose: which perforator for which repair task is best suited. straight or barrel? Let’s figure out how these devices differ.
Vertical (barrel) rock drill
This type of tool has a more complex device. the motor is located perpendicular to the axis of the drill, in the lower, vertical part of the body. Therefore, the design provides for a gearbox that transmits torque to the motor shaft. These devices are more powerful than direct ones and are equipped with a cooling air system. It is these devices, like the Makita HR4013C, that belong to professional ones, since in terms of operation they are comparable to jackhammers.
The design includes a crank mechanism, due to which the impact indicators of the device are increased. With such a device, it is possible to perform heavy construction operations in solid reinforced concrete and stone structures: demolishing walls, removing the concrete layer of the floor, drilling large holes.
Also, the device proved to be indispensable when mixing large volumes of building mixtures. Cooling of the motor in drum units is more efficient, so frequent breaks do not need to be taken.
The disadvantages of such devices include their considerable weight, but in some works, the mass of the device increases the kinetic energy of destruction.
In general, the advantageous features of barrel-type tools, for example, the Bosch GBH 4-32 DFR SET, are:
- The device is wear-resistant, has a long durability resource when chiselling (as opposed to a straight one);
- The achieved torque indicators allow performing the functions of a mixer;
- The ability to create holes of large diameters in hard textures;
- Impact parameters are sufficient for dismantling walls;
- Efficient vertical drilling.
Which of the 2 types of rock drills is better. vertical or horizontal?
Professional rock drills for dismantling partitions and other destructive operations have been used by builders for a long time. modern tools are already aimed at home craftsmen. they are lighter, more functional and at the same time no less productive.
Horizontal (pistol) perforator
The appearance of these tools resembles a drill due to the horizontal position of the motor, as in the Makita HR2470 model. Since the motor is mounted on the axis of the drill, the torque is transmitted directly to it. This, on the one hand, allows you to achieve good speed during drilling operations, on the other hand, it limits the force of impact. Such a device is more suited for home use, since it is convenient to hold, it is compact, and the rotation speed of the rig is sufficient for most simple operations. Many craftsmen choose this type of tool because of the following advantages:
- The device is lightweight, balanced. does not require excessive effort for drilling, fits comfortably in the hand;
- Due to its compactness and elongated shape, it can be used in narrow slots and openings;
- Repair and service is affordable and easy;
- It costs less than a barrel, there are excellent budget models.
Of the shortcomings, users note a weak impact force and low power. In addition, you should always monitor the heating of the case. Pistol devices such as the Sparky BPR 280CE do not cool the engine well enough, so frequent breaks are required so as not to overheat the engine.
Hammer Drill vs Rotary Hammer Drill PART 2 | What’s the difference?
Usually, such devices are considered semi-professional, since their power is low and they cannot cope with the demolition of structures. Most often, pistol models, like the Bosch GBH 2-28, are used to install chipboard shields, chipping walls and other small household tasks.
- For household needs, it is better to choose a horizontal type of instrument. although it is weaker than a barrel one, its power is quite enough for household and repair tasks. Do not overpay for a powerful unit with unnecessary functions.
- If there is a serious renovation of an apartment with redevelopment, demolition of partitions, replacement of electrics, you should think about a more productive model with good shock performance, the possibility of long-term operation without annoying interruptions for cooling the device and anti-vibration protection. These characteristics are present in devices with a vertical motor placement.
- An important factor when choosing is the manufacturer. You should focus on brands that are well known in the world of power tools. This will ensure that the declared characteristics correspond to the valid ones.
- Always adhere to the manufacturer’s instructions and recommendations.
For example, let’s compare the barrel Makita HR2810 and the straight Makita HR2300:
Punch of which company to choose
Which hammer drill to choose: useful tips
During any construction or repair work, you cannot do without a hammer drill. And how to choose the right puncher, for the masters, question number one.
Now we will tell you about all the nuances of choosing and even how to choose a hammer drill for home use that will meet all your expectations.
In this article:
- Punch of which company to choose
- How to choose the right hammer drill for home: selection criteria
- Which punch to choose for a home craftsman
- Which rotary hammer to choose for work: important points
- Which hammer drill to choose barrel or straight
- Rotary hammers Yato: rules of operation
Which rotary hammer to choose for work: important points
Accordingly, as far as work is concerned, for professional use you need to choose powerful rotary hammers.
For example, even experienced craftsmen are wondering which perforator to choose in terms of power so that the tool can withstand many hours of stress.
That is why, before choosing a hammer drill for work, be sure to pay attention to the power of the tool. One of the most important technical parameters of rock drills is power. And, the more the power of the tool, the more it will weigh. Almost all tools are made according to this principle, so you yourself have to choose the right rotary hammer for work, given its weight.
Often, buyers also have questions about how to choose a hammer drill for production, or which hammer to choose for installing air conditioners.
In both cases, it is necessary to take into account all working conditions and individually select a perforator. Since there are many parameters that affect the operation of the punch.
How to choose the right hammer drill for home: selection criteria
You often ask how to choose a household rotary hammer and what to look for when buying such a tool. First, you need to familiarize yourself with what types and types of rock drills exist in general.
For example, according to the method of use and the recommended loads, perforators are divided into:
As for professional tools, they weigh much more and are much more powerful than others. The big and main advantage of professional tools is that they can withstand large and prolonged loads.
In turn, household tools are designed for periodic work.
Which punch to choose for a home craftsman
In addition to the fact that perforators are divided into household and professional, they are also divided according to several parameters, in particular, according to the method of power supply.
This is quite an important criterion, since you need to choose a hammer drill based on where you will work on it and in what conditions.
So, according to the feeding method, all rotary hammers are divided into:
- Electrical tools. This type of power supply allows you to operate the instrument only when there is an electrical outlet or where an extension cord can reach. The advantage of such rock drills is that they can work continuously and without recharging.
- Cordless tools. If you have a need to work on the street, or in the country, then you will need a cordless tool, since you will not be dependent on the availability of outlets nearby.
Also, it is worth considering that some modern models of battery-powered rotary hammers can work without losing power at all. Therefore, the question remains how to choose a cordless rotary hammer for home use.
The only thing you have to get used to and do not forget about recharging the battery.
Based on the fact that most often you will work at home, where there are sockets everywhere, you do not need to buy a cordless tool, you can easily do with a network puncher.
If you still do not know how to choose a good rotary hammer, then an ideal example of a tool that is suitable for both domestic work and for longer is the SDS Yato rotary hammer, model YT-82770.
This is a fairly light hammer drill that will be comfortable to hold in your hand while working. Such a hammer drill weighs only 2 kilograms.
Thanks to its low weight, short body and long-life battery, it is ideal for stretch ceilings and serial drilling in concrete.
It is also recommended to buy such a tool not only for household work, but also for installers and electricians.
It should be borne in mind that this Yato rotary hammer is capable of performing as many as three functions, in particular, drilling and hammer drilling, as well as forging.
The Yato rotary hammer also boasts a good battery, for example, with one battery charge, it can easily make close to 60 holes in concrete. It is also recommended to have a second (spare) battery to replace.
In addition, there is a special quick-detachable SDS-plus holder, a 4-stage battery charge indicator and protection against overheating of battery cells.
It is worth considering that for domestic use, you can choose an inexpensive rotary hammer, since infrequent work does not require the most powerful tool.
Which hammer drill to choose barrel or straight
There is another difference worth paying attention to that affects the work process and productivity. The point is that rock drills are still divided after the location of the engine into straight and barrel rock drills. Now we will help you figure out how they differ from each other and how this affects the work in general.
If we take a closer look at straight perforators, then in appearance they look more like a drill. They are also characterized by a horizontal engine and basically this type of model weighs a little.
The straight type hammer drill works best in tight spaces due to its compact body and weight.
Drum rock drills are classified as medium to heavy rock drills. The body of such perforators is in the form of a cylinder and is located vertically relative to the body, an active anti-vibration system, then it is not so comfortable to work with it due to the increased amount of vibration.
Rotary hammers Yato: rules of operation
In order for your perforator to last longer and perform the assigned tasks without any problems, you need to adhere to the elementary rules for operating the tools.
Among the rules that must be followed, it is worth highlighting:
- Use chucks for their intended purpose and in accordance with the hammer drill. For a specific type and model of rotary hammer, use only cartridges that are designed for that model.
- Remember to clean and lubricate every time after use.
- You should not use the hammer drill continuously, it should be allowed to rest every few hours.
- You cannot use only the shock mode for a long time, it is necessary to alternate the modes if possible.
- If you notice even the smallest malfunction or breakdown, then first of all you need to contact the service center.
Also, do not forget about your own safety rules while working and take care of yourself. Be sure to work with protective gloves, special clothing and during the work process, focus on the tool. If you do not feel well, then in no case do not start work.
Technical features: which rotary hammer is better to choose
Depending on the location of the engine, rock drills are straight and L-shaped (barrel).
The engine of the former is in a horizontal plane, which gives the system a relative thinness and elongation, which means that it makes it possible to work in narrow openings.
In tools of the second type, the motor is installed vertically, so the length of such rotary hammers is shorter. This design contributes to more efficient ventilation of the motor and increases the continuous running time. Often the total working life of L-shaped models is greater.
To choose the right tool, you need to decide on the number of required modes.
Rotary hammers can operate in non-hammer drilling mode (like a drill), hammer drilling mode (basic mode) and hammer mode.
Other details to watch out for:
- Safety clutch, which protects both the engine and the operator when the drill gets jammed;
- Anti-vibration system responsible for the convenience of work;
- Changing the direction of rotation to use the hammer drill as a screwdriver and release a jammed tool;
- Soft start function for a smoother and more accurate start of drilling;
- A release button that maintains established performance and eliminates the need to constantly press the Start button;
- Ventilation and dust protection, which increase the duration and comfort of work;
- Drilling depth and rotation speed adjustment, on which the drilling accuracy depends;
- Additional electronics capable of adjusting the rotation speed based on material analysis;
- Built-in vacuum cleaner to remove dust in the bag.
For a home craftsman. a person who uses a tool from time to time, a hammer drill is a more functional tool than a drill.
But the ideal option for all occasions is the presence of both tools.
Most impact drills have two or more rotational speeds, but there are also single-speed samples.
Drills can be equipped with a soft start system and electronic speed stabilization, as well as a reverse, which allows you to change the direction of rotation of the engine, that is, tighten and unscrew screws and screws during carpentry, locksmith and construction work.
The infinitely variable speed control makes it easier to start drilling and ensures the optimum torque for screwing in the screws.
The torque limiter ensures that the screws are tightened with a uniform force, the integrity of their heads, and also increases the safety of working with the drill. If the drill gets jammed, the electric motor turns off automatically, therefore, the possibility of injury to the wrist joint is excluded.
A safety clutch shuts down the drill in case of overload, protecting the motor or gearbox from damage.
The optimal operating mode of the tool, taking into account the material being processed, is provided by the presetting of the speed range.
And the drilling depth is adjusted using a limit stop. Additional handle for comfortable work.
Impact work: what to choose. a drill or a hammer drill?
How to choose a puncher
Unlike an impact drill, the main purpose of a hammer drill is to punch holes in concrete, stone and brick. Rock drill demonstrates higher productivity with less wear on the hammer mechanism.
Perforators differ in the way of forming a blow.
A ratchet mechanism is used in an impact drill, but an electro-pneumatic or electromagnetic method is implemented in the hammer drill. The force of the generated impact here does not depend on the force with which the operator presses the tool.
What are the types of cartridges?
Impact drills are often fitted with a traditional jaw or toothed chuck, a special tool in which the drill is held in place with a wrench.
The more advanced one- or two-sleeve keyless chuck provides low-force drill clamping. The drill is clamped here by hand and does not require a special clamping wrench. over, the clamping quality of such a chuck is not worse than that of a gear.
The two-sleeve chuck is equipped with two rotating rings. for clamping and releasing the drill.
The easiest way to change the drill is in the latest generation single sleeve chucks, where the drill spindle is automatically locked after the engine stops. To replace and fix the drill, simply turn the drill chuck.
Impact drills equipped with SSBF single or double sleeve keyless chuck are used in combination with spindle lock. PressLock and Auto-Lock. PressLock is a spindle lock by pressing a button on the top of the tool body, after which the chuck can be loosened or clamped by rotating it.
The essence of Auto-Lock locking, which allows you to replace the drill without a key, is that after the drill rotor stops, the spindle locks itself.
In this case, it is only necessary to rotate the chuck to change the drill. Auto-Lock is usually used on more powerful models.
Basic classification of impact drills
According to the power source used, drills are divided into mains and battery, according to the intensity of the workload. into household and professional.
The latter are designed for hours of work, they are much more reliable than household ones. The advantages of household tools are low price and low weight.
The working life of such a drill is limited not only by the total number of working hours, but also by the drilling time for each approach.
When choosing an impact drill, take into account the scope of its application. Powerful corded drills are required for drilling in concrete and stone.
Use the cordless hammer drill if there are no power outlets nearby or for work that requires frequent movement. A significant drawback of such a tool is the short operating time between recharges.
But many rechargeable models come with two batteries and a charger to compensate for this shortcoming.
Impact drill: what is it for
An impact drill differs from a perforator in that holes are made in it in structures made of metal, wood, tiles, drywall, brick, concrete and other building materials.
Holes in fragile and soft materials. tiles, plaster, hollow bricks, aerated concrete. are made in the drilling mode, and in hard wall materials (concrete, solid brick). in the drilling mode with axial impact.
The design of the drill includes an impact mechanism, consisting of two contacting ratchets. gear mechanisms of intermittent movement.
They are designed to convert reciprocating rotary motion into intermittent rotary motion in one direction. Impact is made by pressing force.
The disadvantages of this principle of operation are the relatively small amplitude of the impact, its low energy, the need for significant efforts, increased vibration of the tool and its rapid wear in the perforation mode.
Chucks and shanks: what they are for
Drill, lance, drill, chisel and crown. possible working attachments of the hammer drill.
Due to the operating characteristics of the system, rock drill bits differ in shank shape. This is due to the requirements for the movement of the drill during impact work.
Attach the drill to the hammer drill using an SDS-chuck (from the English Special Direct System. “special guide system”).
For small models (weighing up to 4 kg) SDS shanks are used. They can be used to hammer holes with a diameter of up to 30 mm.
For larger-scale work with heavy equipment (drilling up to 55 mm), SDS-max liners are used.
Ordinary drills from drills can also be attached to the hammer drill. To do this, you need an adapter or replaceable chuck.
An additional cartridge is used as an adapter, which is put on the main one. In other models, the SDS chuck can be completely removed and the chuck can be installed under conventional drill bits.
It should be understood that the elongated design of the adapter reduces drilling accuracy and increases the radial runout of the tool.
But even the option of a replaceable cartridge will not be optimal when you need to solve a problem that requires increased accuracy. The design of the rotary hammer is simply not designed for such work, since it allows for backlash.
The performance of the barrel puncher. https://storgom.ua/perforators/1753-vertikalnoe is much better than in the direct form of the device. The engine is located at the bottom, has a vertical position. The gearbox is responsible for the torque, which is built directly into the design of the device. The principle of operation is much more effective, which provides high impact power.
The purpose of the barrels is to carry out construction work in iron and concrete structures.
The advantages of a barrel rock drill:
- wear resistance;
- drilling efficiency.
These types are used to work in the professional construction industry.
Straight hammer drills
The technical characteristics and structure of the body of straight rock drills are reminiscent of drills. The main difference is the location of the motor. The engine has a horizontal position, so these types of rock drills are also called pistol. The motor is located directly on the axis of the drill, the torque is transmitted directly. This arrangement benefits the drill mode, namely, it speeds up drilling operations. The horizontal installation of the motor also has its drawbacks. the impact force is weaker. They are more suitable for home, not large-scale construction work.
Straight rock drills have some advantages:
- ease of use;
- compact size, making the device easy to hold;
- can be used for drilling or dismantling small cracks, small sections of wall ceilings;
- due to their simple design, straight rock drills are easy to maintain and repair;
- affordable cost compared to other types of rotary hammer.
The horizontal tool has some disadvantages. One of them is the weak power of the striking mechanism. The second drawback is poor cooling. It is necessary to monitor its load. In case of severe overheating, the device should be turned off and allowed to cool.
Which hammer drill is better to choose: straight or barrel. The main differences
It doesn’t matter whether you start small or large construction work, in any case, they cannot do without such a common tool as a hammer drill. You will have to face tasks for which an ordinary drill is not an option. For example, to work with a concrete surface, it is necessary to use an impact mechanism that has a perforator.
BEST ROTARY HAMMERS!
Such devices are designed for chipping away plaster, demolition of wall ceilings, and other dismantling work. Almost all models and types of perforators have two modes: a drill for nailing and an impact mechanism for breaking floors.
There are two types of device: straight and barrel. The main differences are the location of the motor and the area of application. Which one is better to choose depends on several criteria.
Which rotary hammer is better: straight or barrel
Which perforator is better: straight or barrel, and which one to choose depends on the type of work (making holes, dismantling walls), place of work (house or large-scale construction).
A horizontal view is best for a home, it is most suitable for small repairs.
If you need to demolish partitions, wall or other ceilings, to carry out a full-fledged renovation of the building, you will need a more powerful vertical, barrel-type perforator. This type will provide high performance as opposed to the horizontal type, as well as power. Much more work can be done with this device.
Another important selection criterion is the manufacturer. Before choosing, it is advisable to check which brand is better, read user comments. After purchase, the instructions should be followed carefully to avoid breakage.
Which rotary hammer is better, barrel or straight
Which rotary hammer is better, barrel or straight
A hammer drill is a tool that greatly facilitates the process of carrying out construction work. Its main purpose is to make holes in hard materials such as stone, brick and concrete.
Quite often, hammer drills are confused with impact drills. Their main difference is the shaping of the blow. The vibrations of the drill in the hammer drill occur due to the electromagnetic or pneumatic mechanism, and in the drill. due to the ratchet mechanism. In turn, the formation of a blow occurs due to two electromagnetic coils, which create a reciprocating movement of the core. Thus, the impact is transmitted to the end part of the drill and hammer drilling is ensured. Currently, two types of perforators are produced. L-shaped (barrel) and straight, differing in external design. That is why buyers often have a question, which rotary hammer is better.
What is the difference between barrel and straight rock drills
Straight rock drills are engine mounted horizontally. Such models have an elongated shape. This allows them to be used for working in crevices and openings. In drum rock drills, the motor is located vertically. This allows the tool length to be reduced and the motor cooling area to be increased. This results in increased tool life.
In addition to the shape, drum and straight rock drills have other differences. So, L-shaped models are somewhat heavier than straight perforators. This is due to the fact that they have a large resource. Thus, when choosing this tool in shape, first of all, you should decide for yourself what is more important, resource or weight.
Note that barrel models, due to effective engine cooling, function efficiently and for a long time without overheating. They have a long service life.
Thus, it can be noted that the drum rock drill has such important advantages as compactness and efficient cooling system, due to which it is characterized by reliability and durability. But the main advantage of the direct puncher is its light weight and the ability to work with these tools in narrow places. Currently, the following models of rotary hammers are in greatest demand: EINHELL BRH 1500/1, BOSCH GBH 2-24 D, MAKITA HR2470T.
The principle of operation of the punch
23 March 2020, Mon
Rotary hammer models differ in design features and scope. But at the same time, they have similar nodes and characteristics. In this article, you will find a detailed description of each characteristic and its impact on the capabilities of the instrument.
How does a puncher work?
The principle of operation of this tool is to convert the energy of electricity into a shock. The hammer drill consists of main and additional systems. The main ones. ensure efficiency, additional ones. add comfort during operation, increase the quality and reliability of the power tool.
The main units include: an electric motor, a percussion mechanism, a chuck for securing a drill and a gearbox. Auxiliary systems include anti-vibration mechanisms, accessories for limiting the drilling depth, switches, regulators and dust extraction system.
Electric motor. Rock drills are equipped with vertical and horizontal motors. Horizontal (straight) models are lighter and more compact. Convenient for working in confined spaces. Their main disadvantages are poor cooling and exposure to increased shock loads.
The vertical arrangement is used in barrel models. It reduces shock loading and contributes to better engine cooling. And the additional usable volume is used for mounting the crank mechanism with an increased piston stroke. Vertical models are stronger, more durable, but heavier.
Removable DFR cartridge. An important element of the hammer drill. Allows you to quickly change the SDS chuck to the jaw chuck.
Tool holder type. Designated by the abbreviation SDS (translated from German: insert, turn, secured). There are 5 types of SDS mounts: regular, top, quick, plus and max.
The SDS-plus chuck is designed for impact forces up to 5 J. It can fix tools with a diameter of 6-12 mm and a length of up to 1 meter. Used in light to medium rock drills.
SDS-max chuck withstands shock loads of up to 30 J. Equipped with an additional guide groove, which provides a more reliable tool fixation. SDS-max is used in professional rock drills.
Impact mechanism. There are 2 types. electromechanical and electro-pneumatic. Electro-pneumatic is better. It allows you to get the maximum impact energy even with a low-power motor, turns off at idle and saves tool life.
There are 2 options for the electro-pneumatic mechanism: bearing and crank mechanism
The bearing is used in household tools, the crank bearing creates a large impact energy, is used in professional models.
Anti-vibration system. It dampens the vibration energy of the instrument. There are 2 types. passive and active (AVS). Active. represented by a combination of counterweight and spring. Installed on a professional instrument.
Additional vibration damping is provided by a handle attached to the body by a spring and a hinge. The passive system consists of anti-vibration pads. They are located on the body and handles.
Control scheme. Needed to control the engine speed. There are different types. Typically this is a variable force trigger or dial. Professional models are equipped with a different circuit: it provides the same engine speed regardless of the load.
Body material. The hammer drill body is made of metal and shockproof plastic. The metal is more durable, characterized by increased thermal conductivity. Therefore, in the area of the engine and working mechanism, the body is metal. Lining is made of plastic to protect against hot metal and the part of the body in which the wiring with controls is located.
Safety clutch. Disconnects the chuck from the shaft when the drill gets jammed. Protects the engine from overheating. Prevents injuries that can result from a sudden stop of the tool. Manufacturers use 2 types of clutches. friction and spring-cam.
Friction clutch. consists of 2 discs that transmit rotational energy to the chuck. At the moment of jamming, they slip and disconnect the shaft from the chuck.
The spring-cam clutch consists of two toothed parts pressed by a spring. If the resistance is higher than the spring force, the couplings will slip and disconnect the shaft from the chuck. The spring clutch is more reliable, but it wears out and begins to block the tool even under light load.
Reducer. It transfers engine energy to the chuck and activates the impact mechanism. There are one and two-speed. Consists of gears of various shapes, lubricated with grease, which is changed during repair or maintenance of the tool.
For household chores, the WRH13-26DFR rotary hammer is enough. For dismantling, it is better to take a barrel-shaped rock drill RH18-38X with an extended service life.
Straight or barrel rock drill, how to choose?
The hammer drill market today is very large and varied. Many manufacturers offer their models and most of them strive to diversify their assortment and produce devices of all types. Today we will analyze the design features of these devices, their advantages and disadvantages, and also give some tips for choosing a tool for novice craftsmen.
Rotary hammers are designed to dismantle various materials by destroying them. Despite the external resemblance to drills, due to their similar designs, rotary hammers have their own unique functionality. Even the simplest models of these devices have at least two modes of operation. The main modes of operation of the devices are as follows: drilling, impact without drilling, impact with drilling or drilling. Depending on the mode, the machine can perform different tasks with different materials.
The drilling mode differs from the similar drilling mode in that the device uses special drills, drills and accessories, with different shanks. The hammer drill is not able to completely replace the drill in this regard, but in many situations its capabilities will be sufficient.
Impact mode, which is characterized by the use of a chisel or chisel, intended for demolition of brick structures, screeds, removing plaster or tiles. If you plan to work a lot in this particular mode, then you will need a powerful one with high impact force. But if the device is needed for irregular operation in this mode, then buying an expensive powerful model will be unjustified.
Drilling (hammer drilling), characterized by the use of various drills, the mode allows you to work with brick, stone, concrete and other hard materials. In this mode, it is easy to make neat holes as well as destroy solid materials.
To choose a puncher, you need to at least superficially know their structure, this will help you choose a device that will have the functionality that is ideal for you. Fortunately, most manufacturers now honestly focus on the quality of their hammer drills, because they have an understanding that these are primarily percussion tools that need a large margin of safety. Chucks and shanks for rock drills differ from their counterparts for drills in design, which is more resistant to stress and durable. But the inherent advantage is the electric shock system. Mechanical and pneumatic shock systems are distinguished, which in turn are divided into several subspecies. But in any case, just know that the more impact force a tool has, the harder materials it can handle. And of course, that such a percussion instrument cannot do without anti-vibration protection, they, in turn, also come in 2 types. The passive system is made up of rubber pads on the handles of the tools, while the active system is a whole set of springs and counterweights that absorb vibration. The passive system is effective on less powerful models, and the active system is indispensable for more powerful devices. Pay attention to the characteristics listed above to select the right tool.
Depending on the structure of the body and the placement of the engine, rock drills are divided into straight and barrel drills.
Straight rock drills are so named due to the fact that the engine inside their housing is placed horizontally. Most of these models are lightweight and are better suited for home or semi-professional use. Hence, their main advantages and disadvantages follow. They are relatively comfortable, both due to their low weight and due to their ergonomics. But at the same time, they are not designed for regular intensive use, they often overheat and generally have little productivity.
Drum rock drills got their name for their characteristic shape, which is due to the vertical placement of the engine inside the housing. They are also known as L-shaped rock drills. Most of these models are intended for semi-professional and professional use. Some of them are able to compete with light bumpers in destructive potential. Due to this design, it was possible to increase the working resource and the impact force, which allows even low-power devices of this type to perform rather difficult tasks. For the sake of such characteristics, I had to sacrifice comfort. Ergonomics of devices are worse than those of direct analogs, and strong vibration complicates the workflow.
Considering all of the above, it is easy to say only that for not the most intensive home use, it is better to choose a light and cheap straight puncher, but for a regular professional barrel hammer. But such cases, when the master needs the lightest or, on the contrary, very heavy device are rather exceptions. In most cases, it is possible to choose between perforators of both types that are similar in characteristics, and in this case it is already a matter of preferences of the master.
For more details on how to choose a specific model of the device, read our material How to choose a puncher? Which manufacturers do Ukrainians trust??
Enjoy your shopping and all the best.!