Rules for the safe use of the tool
To ensure safe working conditions and effective use of the tool when working with a puncher, a number of rules should be observed:
be sure to use personal protective equipment for eyes, ears, hands and feet;
inspect the tool before each start of work;
when drilling long holes, it is necessary to start with short drills and drill gradually;
long-term continuous operation leads to overheating of the gearbox and armature winding. In this case, the perforator must be allowed to cool. The permissible duration of operation in idle mode and under load is indicated in the passport of the tool or in the instruction manual;
observe the lubrication regime for the drill shanks. This should be done with lithol or solid oil every 150-200 drilling operations performed. Some sources recommend lubricating the drill shanks each time the drill is inserted into the chuck;
Perform tool maintenance in a timely manner. The scope of maintenance work and its frequency are indicated in the perforator's passport;
if materials of increased hardness are processed, it is necessary to use liquid cooling of the hole;
cool the drill from time to time during intensive work. The metal of the working tool (drill), when overheated, irrevocably changes its mechanical properties (hardness, elasticity). If you do not cool the drill in a timely manner, it will become unsuitable for further work. There is no standardization of the running time of the drill. It depends on the effort applied to the drill, the material being drilled, the intensity of drilling, etc. It is extremely dangerous to determine the heating temperature of the drill by hand.
It is better to pay attention to the heat coming from the punch body. Overheated borax often change color to a darker color, sometimes with a blue tint.
For long-term drilling of especially hard materials, in order to avoid overheating of the drill, a forced liquid cooling system should be used. Such a system is realized by supplying a cooling emulsion or ordinary water to the drilling zone. For this, thin tubes or special water couplings are used.
Liquid supply to the work area
In order not to complicate the work, it is enough to cool the drill in a prepared container with water at regular intervals. These intervals are established empirically relative to the heating temperature of the drill.
It is important not to overheat the drill. Don't bring it to a state where it changes color
When can the lights flash?
If the perforator is equipped with light signaling lamps, then their signal may mean a breakdown or malfunction of any unit or mechanism. If the red light on the punch is flashing, refer to the instruction manual of the device.
Dismantling the electrical part of the Bosch rotary hammer 2-26
Dismantling the Bosch 2-26 punch, its electrical part, begins with removing the back cover on the punch handle by unscrewing three screws.
The next step is to remove the reverse switch.
Turn it to neutral and lift it towards you. The reverse switch is removed.
To remove the stator cover, it is necessary to hold the mechanical unit in your right hand, and to the left stator housing, pull them in different directions, shaking them.
The stator cover will come off.
Separation of the impact unit with rotor and stator
To separate the rotor from the mechanical unit, it is enough to drag these parts in different directions.The rotor is attached to the mechanical assembly by a small helical gear that is inserted into contact with the large helical gear of the mechanical assembly.
The rotor has been released and you can carefully inspect the condition of the collector, bearings.
Rotary hammer bosch
To remove the stator, it is enough to remove the protective plastic protective casing, and knock with a wooden blank or mallet on the end of the housing, into which the stator is inserted. Before doing this, do not forget to unscrew the two screws holding the stator in the housing.
The stator is removed, the rotor is taken out, you can proceed to their inspection and defect detection of all parts that make up the electrical part of the Bosch rotary hammer.
When inspecting the disassembled Bosch 2-26 hammer drill, pay special attention to the condition of the carbon brushes, the coating on the brush holders and the reliability of their fastening, the integrity of the reverse switch contacts, the condition of the wire at the point of entry into the hammer drill. The length of the brushes should not be shorter than 8 mm
There should be no traces of sparking and carbon dust from the brushes on the brush holders, there should be no burnouts or damage to the contacts on the contacts of the reverse switch of the Bosch 2-26 perforator.
The length of the brushes should not be shorter than 8 mm. There should be no traces of sparking and carbon dust from the brushes on the brush holders; there should be no burnouts or damage to the contacts on the contacts of the reverse switch of the Bosch 2-26 perforator.
Electrical part of the Bosch rotary hammer
This concludes the disassembly.
I wish you success!
Impossibility of fixing the working tool in the keyless chuck
Sometimes a malfunction occurs, which manifests itself in the impossibility of fixing the working body in the keyless chuck.
Interskol perforators are equipped with two types of cartridges: SDS-plus and SDS-max.
Clamping the shanks of the working tool provided by their special design.
Failure of the clamping device occurs due to wear of the locking ball.
Repair of the Interskol perforator, and specifically its keyless chuck, consists in replacing the balls and lubricating the drill shanks with special grease. It is recommended to use a specially formulated ointment as a lubricant for the drill shanks.
Mode switch malfunctions
Interskol perforators are equipped with mode switches of various designs. And this is no accident.
Often, users switch the hammer operation mode without stopping the tool. And this is the main reason for the breakdown of the mode switch in rotary hammers.
The mode switch of Interskol perforators includes a different number of parts.
The mode switch of the Interskol P-18 / 450ER perforator is distinguished by a certain complexity.
Punch mode switch Interskol P-18 / 450ER
Switching modes is carried out by transferring the cam coupling half pos. 44 out of engagement with the pinion shaft pos. 43.
The translation is carried out using the mode switching bracket, pos. 52, the switch bar, pos. 55, and the switch knob, pos. 16.
Malfunctions are manifested in the impossibility of transferring the switch to the desired mode.
The malfunction is eliminated by replacing the spring pos. 48, aligning or replacing bent parts.
The complex design of the mode switch of the Interskol P-18 / 450ER perforator forced the developers to design a new scheme and implement it in the Interskol P-26 / 800ER perforator.
Punch mode switch Interskol P-26 / 800ER
Modes are switched by means of the switch leash, pos. 55, the spring, pos. 56, and the switch knob, pos. 28.
The design uses the smallest number of parts, which increases the reliability and performance of the Interskol P-28 / 800ER perforator.
In the perforator Interskol P600ER, a slightly different design of the mode switch is used.
Mode switch perforator Interskol P-600ER
Modes are switched by removing the clutch (pos. 40) from the rolling bearing (pos. 41).
Preventive measures
After we have sorted out the main reasons for the malfunction of the hammer drill, as well as ways to repair the breakdown, we can highlight several points on how to extend the life of your percussion instrument.
- In the case of frequent repairs, the punch should be cleaned at least once a month.
- Remember to lubricate the parts of the device regularly.
- To prevent malfunctions, you should choose a quality rotary hammer. Cheap devices only work a couple of times a year.
- So that the mechanism does not overheat and the brushes are not erased, it is worth taking breaks from work. For example, after use for 20-30 minutes, let yourself and the punch rest for 10 minutes.
- Last but not least, after you are done, do not leave the hammer drill dirty. Be sure to clean it after each use and put it in a special drawer.
By following these little tips, you can extend the life of your hammer drill, which will save you both time to repair it and money on buying a new tool.
Don't be afraid to take it apart, maybe it stopped working due to a small malfunction that you can solve with your own hands.
For information on how to fix a punch with your own hands, see the next video.
The principle of disassembling the rotary hammer
Repair of any device begins with a neat and careful disassembly of the unit. If the design of the device is poorly understood, it is better to photograph each stage of disassembly, so that in the future it will be easier to carry out the process of reassembling the element.
Elimination of almost any malfunction of a hammer drill involves its partial or complete disassembly. The only exception is damage to the electrical plug of the unit. Due to the fact that almost all models of perforators are structurally arranged in the same way, the process of disassembling them is carried out according to a similar scheme.
Do-it-yourself repair of the hammer drill cartridge begins after removing it from the unit itself. The cartridge is disassembled using a flat screwdriver after removing the working attachment. When a drill, chisel or drill gets stuck in the chuck, it can be difficult to get it out. If the fixture is jammed, then you need to add a few drops of grease inside and gently tap the cartridge with a rubber hammer. After a few minutes of pause, a second attempt to remove the instrument will be successful. Next, you should disassemble the cartridge:
- Pull the plastic skirt down.
- Using a screwdriver, pick up and remove the protective rubber boot.
- Carefully open and remove the retaining ring located behind the boot.
- Then remove the plastic boot, lock plates, spring and balls.
- All removed parts must be cleaned of debris and old grease.
During the dismantling process, you need to carefully inspect all the component parts of the cartridge in order to identify faulty parts. The question of how to change the cartridge on the hammer drill is easily solved if you have a spare, fully serviceable part of the device in stock. Replacing it is carried out when the device is fully assembled after the damage has been eliminated.
Next, you should disassemble the punch body. First of all, it is necessary to remove the mode switch of the unit. For this:
- We set the jackhammer mode on the switch.
- Then we turn the lever a little lower, while simultaneously pressing the button until it clicks.
- We pull the switch towards ourselves, pry it with a screwdriver, remove it from the case. On some models, this device can be secured with screws.