How to use the punch correctly and safely An overview of the device and the rules for using the punch. How to safely use a hammer drill, how to insert and remove a drill, how to drill holes.
The reverse function allows you to switch the direction of rotation of the chuck in different directions.
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, which can be used to tighten and unscrew bolts, nuts and screws of any size and configuration.
The principle of the hammer drill
The innovative essence of the invention of the rock drill is that the impact force is generated by the tool itself. This happens due to the conversion of the rotational energy of the electric motor into the translational movement of the piston. The piston sets in motion the striker (striker), which already directly performs the work.
Depending on which tool is used, which mode is activated, the hammer drill can drill, drill or work in the mode of a jackhammer.
The rated power of the rock drill ranges from 1.5 kJ to 20 kJ. If we imagine that a 1 kg weight was dropped on the floor from a height of 1 m, it will hit the floor surface with a force of 1 kJ. Accordingly, a 20 kg weight will hit with a force of 20 kJ.
How to insert / pull out a drill or drill
To work safely with a hammer drill, you need to master a few simple skills. Mandatory skills include installing and removing a drill, drill or any other accessory.
Rotary hammer drill lubricant how to use?
To do this, it is enough to squeeze the mixture out of the tube into the open grooves and distribute it evenly over the entire length of the groove, and for closed grooves it is necessary to lubricate with a napkin without leaving a “thick” layer. After the end of the work, the shank must be thoroughly wiped off so that it is clean during storage, the residual film of lubricant is sufficient to prevent the metal from rusting. In addition to the Bush company, similar lubricants are produced by companies: Makita, Metaba, Interskol.
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Punch chuck operation
After the firing pin strikes the end of the shank, inertia forces the bit forward, transferring the impact energy to the end of the working tool. When you press the drill body, the working tool returns to its original position and the striker strikes the end of the drill again. The stronger the pressure, the greater the recoil from the impact of the piston striker, and vice versa, if there is no return of the shank, the working piston will work idle.
So is the punch bit shank lubricated? Undoubtedly needed. If we proceed from the operating conditions, then it is clear that thick and abundant lubrication is needed for the guides of the open grooves, for the closed grooves that work as a bearing, abundant lubrication is not needed, it is even harmful because balls operating under load will not help, but it can collect dust in the grooves.
Fig. 3 Firms, manufacturers of lubricants for shanks of the working tool of the hammer drill.
To lubricate the shanks of the working tool, manufacturers produce a separate grease that meets the requirements for lubricating open and closed grooves. Such greases have been developed and are widely used, for example, Bosch released grease for bosch rock drill drills, which are used to lubricate the shanks of working tools.
The work of the hammer mechanism of the punch
The name of the punch assumes the presence of a slotting tool function, which can be combined with a drill function, i.E. Rotation. In other words, the hammer drill combines two tools in one: the reciprocating movement of the working body and its rotation. The work of the rock drill is mainly intended for drilling holes in hard materials: concrete or stone.
Taking proper care of your hammer drill
The hammer drill is a hybrid of two types of equipment used to create holes in different materials. Unlike the classic hammer drill, such a drill has some design flaws, which makes its maintenance more difficult and not very convenient. Such disadvantages, in particular, include:
- Lack of a special container into which the lubricating composition is poured;
- The complexity of servicing the cartridge due to the peculiarities of its structure.
The main care of a drill with the functions of a hammer drill is that after each use, the drill of such equipment (including the tail) must be well cleaned of drilling waste, and before inserting such a tool into the drill, a small amount should be applied to its shank lubricants (you can use ordinary grease). Excessive lubricant on the shank will not harm the tool and equipment used, but may adversely affect the appearance of the surface you are drilling, as excess lubricant will spray out from the rotating chuck.
Impact Drill Gear Lubrication
As a rule, drills with the functions of a perforator are purchased for domestic use, since their price is quite affordable, and they do quite well with their functions when performing simple repairs around the house. Despite the fact that these power tools have the features mentioned above, maintenance of the rotary hammer drill is not time-consuming and does not cause problems even for inexperienced users.
Why do punch elements need lubrication
Lubricant, including that used for a perforator, is a viscous substance, the use of which is necessary to reduce the coefficient of friction between structural elements of a mechanical device moving relative to each other. Thus, the lubricant only reduces friction, but does not completely eliminate it, therefore, the lubricating composition is gradually saturated with wear products of rubbing parts with metal dust. As a result, not only does the viscosity of the lubricating composition change, but it itself becomes the cause of more intensive wear of the equipment.
Over time, the grease becomes dirty and loses its properties
How to choose the right lubricant for a specific rock drill model? First of all, it is necessary to take into account the recommendations of the equipment manufacturer, which necessarily indicates both the required type of lubricant composition and the frequency of its replacement. It is especially important to be guided by such recommendations before the warranty period for the hammer drill has expired. Otherwise, in the event of a device breakdown, you will not be able to take advantage of the manufacturer’s warranty obligations.
After the expiration of the warranty period, many owners of rotary hammers begin to use not proprietary formulations for lubrication, but their cheaper counterparts lithol or solidol. Of course, such lubricants are not able to harm the structural elements of the perforator, but when using them, it should be borne in mind that they should be replaced much more often.
The hammer drill reducer is the most complex structural unit of the device, therefore it requires special attention. It is not so difficult to lubricate the perforator gearbox, but self-assembly of a previously disassembled unit can cause serious difficulties. If the hammer drill is still under warranty, then it is best to contact a specialized workshop with a question about lubricating its gearbox, which provides warranty service for such equipment.
A detailed diagram of the device of your punch will help you understand the mechanism and correctly assemble the tool
If, however, the hammer drill you own is not covered by any warranty or the warranty period for your equipment has already expired, and the authorized service center is far enough away, you can lubricate the gearbox yourself, observing the maximum accuracy and care. To do this, you need:
- A set of locksmith tools with which you will assemble and disassemble the perforator gearbox;
- Clean rags;
- The composition itself for performing the lubrication.
Native grease for the Makita P-08361 gearbox. Refills upon initial tool assembly and is recommended for maintenance
It is better if the lubricant is a proprietary agent specially designed for equipment of a certain brand. So, it can be grease for a Makita rotary hammer or grease for a Bosch rotary hammer. If you do not have a branded lubricant, but you cannot buy it, you can also use inexpensive domestic lubricants.
It is very important that you have instructions for the hammer drill you are going to lubricate. Naturally, if you are the owner of a Makita or Bosch hammer drill, this should be a manual for the equipment of these particular brands.
All parts of the gearbox must be completely cleaned of old grease
Having carefully studied the instructions for the hammer drill, you can begin the procedure for lubricating its gearbox.
- Before disassembling, the rotary hammer should be well cleaned of dust.
- When disassembling the gearbox, it is advisable to immediately remember how the elements of its design are located in it. It should be borne in mind that it is not recommended to disassemble and lubricate the gearbox immediately after using the hammer drill. This is explained by the fact that the still hot parts of the gearbox can lose their physical characteristics when a cold lubricant gets on them.
- After all the components of the gearbox have been removed from its housing, they should be thoroughly washed with gasoline or spindle oil and wiped dry.
- The inside of the gearbox housing must also be washed, wiped clean (as far as possible) and allowed to dry completely.
- When disassembling the perforator gearbox, you can pay attention to the fact that there is no lubrication on some elements of its design. This only means that such parts do not need lubrication and there is no need to apply it to them.
- As mentioned above, it is better to use a proprietary lubricant for the gearbox of a drill or hammer drill, which has a number of advantages. In particular, branded lubricants retain their original characteristics much longer, so they can be used much less frequently. In addition, the proprietary lubricant composition has such an important quality as water resistance, so it effectively protects the metal parts of the hammer drill from moisture and, accordingly, from corrosion. As a good alternative to branded lubricants for a hammer drill or drill gear, you can use Metabo oil, the cost of which is quite affordable.
- After lubrication of all elements, the gearbox must be carefully assembled following the reverse sequence.
Before performing this procedure, the tool shank must be thoroughly cleaned. After that, a special lubricant for rock drill drills or regular lithol is usually applied. In addition, if an open-type cartridge is installed on the perforators, it is advisable, after wiping it, to process its oil seal, which will provide more reliable protection of the inside of the device from dust entering it.
Hammer drill bit lubrication