Installation of electric brushes
Remove dirt from the grooves of the brush holder and reinstall the brushes, securing them with the latches.
Now is the time to check the performance of the hammer drill. Connect the punch plug to the outlet, turn on the punch for a while in the "drilling" mode. After making sure that the tool is working, turn it off. Set the mode switch to the "shock" position. Do not insert the tool.
Check the operation of the punch in this position. At the same time, you checked the operation of the mode switch.
It remains to check the layout of the speed control button, make sure that the contact connections are reliable, and you can start installing the cover plate.
Installing the cover
The cover is secured with three M × 4 self-tapping screws of different lengths.
Connect the punch to a 220Β mains and test in all modes.
Punch Makita 2450 or 2470 is assembled and works properly!
Features of the choice of oil
One of the main parameters that is taken into account when purchasing a lubricant is the viscosity of the oil. High quality products are usually expensive, but in this case, you do not need to save. The hammer drill is an expensive tool, so you should constantly take care of its performance. Usually, the types of grease are listed in the instructions, but if information is not available, then you can always consult the manager of the service center or the outlet where the device was purchased. Experts will select the optimal composition for the hammer drill.
There are also universal compounds that can be used to lubricate different types of drills. In recent years, graphite lubricants have been very popular because of their good viscosity and high quality level.
Experienced specialists confirm that many branded mixtures are of much lower quality than mixtures produced on the basis of graphite. In addition, they have a fairly affordable cost, so many people confidently make a choice in their favor.
For perforators, you should take substances such as grease and lithol. Litol - 25 is a high quality durable material with low cost. Therefore, it is very popular with power tool owners.
Do not forget that such mixtures can cause slight braking of rotating structures, and can also significantly increase the heating of the tool during operation.
And in order to lubricate the gearbox, a more liquid composition is required, which must completely cover the contacting parts, filling the free cavities. But if there are plastic parts in the gearbox, then the lubricant can only be silicone.
The transmission mechanism can also be lubricated with plastic compounds, however, not every technique can function without interruptions when using funds with a similar consistency.
Thicker mixes are suitable to reduce wear on the tail nozzles. Usually it is indicated on the packaging that they are intended for handling drills.
For cartridges, silicone grease options can be used. Lubricants are branded, which are manufactured by manufacturers of electrical tools, for example, Hitachi or Metabo, as well as AEG, Bosch or Interskol. They can also be produced by enterprises specializing in the production of lubricant mixtures.
The most popular brands are:
- Bosch - produces oils for gear lubrication and tail nozzles;
- Makita - purchased for drills;
- Lubcon Thermoplex - manufactures products for gearboxes;
- Turmogrease - multipurpose greases;
- Nanotek - used for shanks;
- Interskol - optimal for drilling drills;
- PRORAB - is a compound used to process tail fittings;
- Kress - used for lubrication greasing drills.
The main operating modes of the punch
Perforators operate in several basic modes, switchable by the operator, depending on the work being done.
Rock drill operating modes: drilling, drilling, impact
Drilling
It is performed after switching the regulator to the corresponding mode (drill icon). The overwhelming number of models of rock drills are equipped with the function of a gradual set of revolutions of the working shaft. The speed is controlled with the start button. With a slight pressure, the revolutions from zero smoothly rise higher. When the button is pressed all the way, the revolutions become maximum.
Depending on the material to be drilled, it is recommended to adjust the speed of the drill or drill bit. So, wood products are best drilled at high speeds, metal at low speeds, and concrete or stone at medium speeds.
Most often, the hammer drill is used for drilling stone or concrete. This is due to the fact that the device of the chuck for fastening the drill has a backlash in the longitudinal axis, designed for the percussion drilling function. Therefore, when drilling holes in wood or metal, it is not always possible to achieve the desired accuracy. The drill tip may wiggle slightly.
It is recommended to use a chuck with SDS shank for precise drilling of holes. The drill without play is fixed in a chuck, which is inserted into the hammer drill. Jaw chuck included or sold separately. Any holes and materials can be drilled with a replaceable chuck.
Drilling
The drilling mode is turned on by moving the switch register to the middle position (you need to select the drill and hammer icon). Usually indicated by the sign of a drill and a hammer drawn on the body at the same time. Drilling is used for slotting concrete and stone materials. It is possible not only to make holes, but also to lay ducts for routing electrical and other cables in plaster or brick walls.
Since drilling takes many different forms, engineers have developed numerous attachments to suit a variety of conditions. All of them are united by the presence of a special shank, which is combined with the SDS + chuck.
Hit
Impact mode is used for assembly and disassembly work. It is marked with a hammer icon on the mode switch. When working in this mode, there is no rotation of the working shaft. Only the translational movement of the tool takes place.
Reverse
The reverse function allows you to switch the direction of rotation of the chuck in different directions.
Reverse switch is close at hand
Often, when drilling reinforced concrete structures, the drill rests against the reinforcement and enters a clinch with it. In order to release it, a reverse switch is provided, which makes it possible to turn the drill in the opposite direction and continue drilling, bypassing the reinforcement. Usually the reverse button is located directly next to the start button of the unit.
The reverse mode turns the hammer drill into a screwdriver, with which you can tighten and unscrew bolts, nuts and screws of any size and configuration.
Additional tool features
In addition to the above, the standard set of options in a modern rock drill include:
- a ruler to determine the depth of the hole;
- lever for fixing the operating position of the start button;
- safety clutch - stops the motor when the drill gets jammed.
- dust removal - impeller on the engine with a system of dust extraction channels;
- vibration damping - special springs between the body and the power unit;
- electronic regulation of operation and monitoring of the condition of the brushes on the collector of the electric motor.
Specifications
Makita was founded in the Land of the Rising Sun and is considered one of the best power tool manufacturers in professional circles. Makita dates back to the 15th year of the last century, then it began to produce electric motors. The first popular professional tool that made the company famous was the electric plane. To date, the range of the Makita company has about four hundred positions; screwdrivers and hammer drills are the areas that the corporation has been developing especially actively in recent years. Many innovative innovations have been introduced into these devices, for example, self-contained power supplies have been improved, which have become even more compact and energy-intensive.
Many of the corporation's production facilities have been moved outside the country to Asian countries, where labor is much cheaper. This allows Makita to be more competitive and invest in new models and developments. Makita's trademark and pride is its longstanding partnership with NASA (USA) aerospace corporation.
Advantages
Features and benefits of power tools from "Makita":
- compact size;
- good power;
- little weight;
- the presence of double insulation;
- high performance;
- the ability to quickly change nodes;
- versatility and convenient functionality.
disadvantages
Any instrument or device sooner or later falls into disrepair.
The most frequent breakdowns in Makita products:
- the appearance of cracks on the shaft of the unit;
- damage to the striker;
- abrasion of couplings and gears;
- failure of bearings;
- burnout of the winding;
- grease leakage.
Useful Tips
Owners of drills and hammer drills often wonder about the frequency of lubrication. Determining the time frame is problematic, but on average, the optimal period for an oil change is considered to be a period of 12 months if the tool is operated at medium intensity.
Lubrication of many modern instruments is greatly simplified through the introduction of a number of useful improvements. For example, popular brands often make special holes in technology, into which the lubricating composition is simply poured, and the need for its disassembly and subsequent assembly disappears.
Usually, such systems are designed very competently - in addition to the holes for filling the oil, there are also outlets through which the damaged grease is drained.
There are special marks on the surface of the device that directly indicate how much lubricant is needed to maintain the functional operation of the power tool.
Lack of lubricant is often the main cause of serious rock drill malfunctions. In the crushing mode, the lubricant is wasted in a significant amount, and if there is too little lubricant on the gearbox or drill, this often causes overheating of the entire device.
For information on how to properly lubricate the punch, see the next video.
The order of assembly of the punch Makita 2450
Assembling the striking mechanism
And how to assemble the Makita percussion mechanism?
The percussion mechanism is assembled from two units: a barrel shaft with a spur gear and an intermediate shaft with a rolling bearing.
A). A spur gear, pos. 19, is put on the barrel, pos. 21, and pressed by the compression spring, pos. 18.
To fix the spring, it is pressed with a washer 30 pos. 17 and secured with a retaining ring 28 pos. 16.
B). To assemble the striker, it is necessary to put the ring 9, pos. 25, on the shaft of the striker, pull the rubber ring, pos. 26, press down with the metal ring, pos. 27.
Now we go to the opposite side of the barrel, pos. 21. On the other hand, the inner surface of the barrel must be lubricated with grease and the assembled drummer, pos. 24, inserted inside.
Assembling the intermediate shaft and piston
Assembling the intermediate shaft assembly
Intermediate shaft
To assemble the intermediate shaft, it is necessary to put the rolling bearing, pos. 41, on the shaft, pos. 40, with the teeth to the splines of the shaft, put the coupling on the splines, pos. 39, on the splines of the shaft.
Transfer of translational motion
On the opposite side of the shaft, put on helical gear 26 pos. 42, flat washer 8 pos. 45, bearing 608zz pos. 46 and retaining ring 8 pos. 47.
The intermediate shaft is assembled.
Assembling the reducer assembly
The assembly of the gear unit is carried out on the inner casing, pos. 49.
Inner body
By the way, there are cases when the axles pop out of the inner aluminum housing. Both axles are pressed into the housing.
The assembled intermediate shaft is inserted into the housing of pos. 49, the rolling bearing lever of which must fall into the hole in the cylinder hinge.
In this case, the lever of the rolling bearing, pos. 41, of the intermediate shaft must fall into the joint of the cylinder, pos. 32, and the lower bearing of the intermediate shaft, into the seat in the housing. This procedure is usually performed by rocking the structure until the parts are completely in the indicated places.
The puncher hits badly - what is the reason?
If the power tool does not work completely, then the most likely failure of the components of the electrical part - the cable, button, brushes, electric motor. If the drilling mode functions, but the hammer drill has begun to hammer badly (or has completely stopped), the following breakdowns are most likely:
- damage to the floating ("drunk") bearing - usually it does not withstand and its cage is destroyed - or to the crank mechanism in "barrel" models;
- wear of piston or striker rubber rings that need periodic replacement;
- failure of the striking mechanism. Most often, improper use of the tool leads to the splitting of the steel striker, as a result of which the impact becomes weaker and finally disappears;
- wear of the splines located on the intermediate shaft of the clutch;
- destruction of elements included in the piston group - liners and / or pistons.
A universal hammering tool with a percussion-rotary mechanism, also known as a hammer drill, is used by construction crews, electricians and repairmen. They also use it in their home workshop.
Like other electrical appliances, the hammer drill sometimes breaks. Take it to the service and leave a certain amount there, or take advice and repair the tool yourself - everyone decides for himself. If the decision to repair the puncher at home is made, first you should study the features of its device and the advice of the masters for diagnostics and repair.
Comparison with other models
The domestic company Interskol and Makita have the highest sales of power tools in Russia. Makita is a renowned company, it produces a professional power tool that can be operated daily for 8-10 hours. Such requirements presuppose a large functional resource. Interskol focuses more on the production of household tools, the resource is laid less than that of Japanese technology, but the products of Interskol are much cheaper. For household needs, when a perforator or drill is needed every six months, you cannot find better equipment.
In terms of the breadth of the assortment, the Russian company is in no way inferior to the eminent corporation from the Land of the Rising Sun. The advantage of Japanese products is that each model is carefully thought out and worked out, it is convenient and pleasant to work with such a tool. According to the quality criterion, Makita is the undisputed leader.
Disadvantages of Interskol:
- a backlash sometimes appears in the tooling, which affects the accuracy of the work;
- the instrument is noisier;
- hammer drills are larger and weigh more.
Bosch and Makita are the two largest players in the global power tool market.
Bosch also specializes in the following areas:
- production of components for cars;
- production of turbines and household appliances.
Makita is "sharpened" only for the production of power tools, in terms of the breadth of models in this segment, the company is not inferior to Bosch, and in some ways even surpasses the German corporation.For example, Makita makes electric hammers - over twenty positions - while Bosch makes only five. The Bosch Green Line is a tool designed for household needs. The Blue Series is a tool for professionals. It makes sense to compare only "blue" "Bosch" with "Makita". Most often, Bosch bypasses Makita in terms of innovation, the scientific and technical base of the German giant is richer. The SDS-Plus cartridge (a device for attaching drills to rock drills) was invented and implemented by a German company.
How to choose?
The criteria for choosing the Makita perforator are based on the information: what kind of work will be performed predominantly by the perforator. All this will affect:
- on the power of the perforator;
- what battery is needed for the device;
- how many modes of operation are required (three-mode, two-mode);
- what additional accessories should be in the form of attachments.
As an example, the following fact can be cited: a perforator is being bought for dismantling premises. The unit is supposed to be used almost daily for many hours. In this case, it is required to purchase lithium chargers (Li-ion), they are more expensive than nickel-cadmium (Ni-Ca) chargers, but they provide a longer operating mode (50%). It is clear that with intensive use, lithium cells will pay off in a short time.
Instructions for using the device
Rotary hammers are widely used in modern construction industry, they have replaced monotonous and ineffective manual labor. But its use is fraught with certain risks that you need to be aware of before starting work.
Working with a hammer drill requires accuracy
First of all, you need to work with a serviceable tool in a regular mode authorized by the manufacturer. The power supply must be provided through a cable with a cross-section suitable for the power consumption.
After transporting the rotary hammer in the cold season, to soften the lubricating fluids inside the mechanism, you must wait at least half an hour.
The operator performing the work must be healthy. Before work, it is necessary to study the instructions for the device and safety rules.