Consider another budget option for a jigsaw - the Crimean Fiolent. This is a perfectly acceptable model both in terms of price and quality. There are two problems in the operation of a jigsaw. This is a possible failure of the stem during improper handling of the tool and insufficient or illiterate lubrication.
In the first case, in order to avoid this damage, it is enough to carefully and carefully handle the tool.But if this does happen, you will have to replace the damaged stem. For this you need:
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In the second case, everything is much more serious. It would seem, what is difficult about lubrication? But due to the fact that the tool constantly works in extreme conditions, the ingress of wood dust into the device cannot be avoided, it is necessary to carry out service work according to the intensity of operation, but at least once a year.
All mating parts and assemblies need to be lubricated. To do this, you need to disassemble the jigsaw. But if in the first case, for example, you limited yourself only to dismantling the stem, now we disassemble the tool completely and re-lubricate all the rubbing surfaces of the parts.
For lubrication, the manufacturer offers Litol 24, but it will not work in the jigsaw gearbox, due to its thick consistency, therefore, as a rule, it is lubricated with oils. You can combine Litol 24 with Feol 2U graphite grease in a ratio of 3: 1.
However, it should be borne in mind that now the fluidity of the lubricant mixture is higher, and after some operating time it will begin to enter the engine rotor. The reason for this is left-hand drive. When the rotor rotates, the lubricant mixture is captured by the teeth and is fed to the rotor like a screw. The oil separator installed inside the motor housing does not fulfill its function. In theory, it should throw away the incoming mixture, but in practice this does not happen. This is evidence of the imperfection of the design proposed by the manufacturer.
To avoid this problem, some work needs to be done. Or rather, put the oil separator not inside, but outside the motor housing. At the same time, in order for the oil separator snail to work and discard oil, it is turned over.
One more nuance. The bore diameter is Ø 9 mm, and the diameter of the outer part of the oil separator is Ø 9.2 mm - it ideally blocks the passage for the lubricant mixture. But when installing it, you need to apply a certain effort and a nozzle in the form of a pipe of a suitable size.
In addition, it is advisable to install a dust washer on the rear bearing of the armature. It will protect it from wood dust and extend its service life.
After that, you need to assemble the oiled jigsaw and test it for performance. After 10 hours of operation, the tool should be checked for grease penetration into the motor housing. If everything is done correctly, then such an option is excluded.
And of course Bosch. The power tool of this manufacturer is distinguished by the high quality of components, assembly and a long service life, provided that it is treated with care. He also has a drawback - the price. Moreover, both the product as a whole and the spare parts are expensive.
It should be noted that the Bosch tool practically does not break, but there are some nuances that appear during long-term use. For example, wear on the brushes of the electric motor, failure of the speed controller or the device for holding the saw blade.There are accidents and more complicated ones, failure of a rod or an anchor, but this is, rather, from incorrect handling.
As in the case of Metabo, Bosch jigsaws are best repaired at service centers. There they will install original spare parts and give a guarantee for the repair performed. But this is an expensive pleasure.
After reading the article, the user gained theoretical knowledge about jigsaw failures. Now, in the event of a breakdown, he will be able to determine the cause and make the right decision, and maybe even perform minor repairs.
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The device and principle of operation of an electric jigsaw
Types of faults
Mechanical faults
Engine malfunctions
Replacing the stem
Replacing the file holder
Replacing brushes
Replacing the start button
Tool prophylaxis
The overall efficiency of the whole mechanism depends on each of its separately taken parts. In the case of a modern electric jigsaw, with a relatively complex design, this is the case. Each element of this device is designed to perform a specific function for the sake of the overall result - the execution of a controlled cut. If a malfunction occurs on one of the components of the mechanism, the performance of the tool may decrease, down to zero. To get your apparatus back into operation, it is enough to find and eliminate the “weak link”. We will tell you how to fix a jigsaw with your own hands and reduce further wear and tear of its parts.
To learn how to identify and troubleshoot a mechanism, you must first understand how it works. The numerous components of the jigsaw design may seem rather difficult to understand at first glance. In fact, the principle of operation of this device is very simple, especially for those who know a little about technology.Next, we will tell you how an electric jigsaw works, outlining the main points in the most popular language, understandable even to an inexperienced reader in electrics.
The mechanism of any electric jigsaw is based on an electric motor, a gearbox and a rod. These are the main elements that make the file make the necessary movements. Often a cooling fan and pendulum mechanism are connected to the engine. The function of supplying energy and in some models of speed regulation is performed by a special start button with an electrical circuit. All of the above elements are compactly and reliably placed in a plastic case, interacting with each other.
To obtain high-frequency reciprocating movements of the saw blade, the energy supplied to the power tool undergoes significant transformations in its body. Bypassing the start button, electricity goes to the graphite brushes of the engine, forcing the rotor to rotate around its axis. The torque is transmitted to a special mechanism "reducer", which converts the movement from rotary to reciprocating, directing it to the rod. The final assembly is the fastener that reliably connects the stem to the saw blade, forming a solid movable structure.
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Prolonged or improper use of the tool can most likely cause damage to it. A malfunction of the device appears as a result of excessive pollution, wear of parts of the mechanism or a short circuit of the electric motor. Repair of a jigsaw, depending on the characteristics of the breakdown, is reduced to cleaning and lubricating the elements, or completely replacing them. Below, we will look at the most common types of breakdowns.
This category includes contamination, wear or complete breakdown of parts of the mechanism. At the same time, the engine of the tool works, but it does not come out to get the required cut. There may be several reasons for mechanical breakdowns requiring repair of jigsaws. Here are the most typical ones.
The jigsaw cuts crooked
Strong vibration and noise
The jigsaw hits when cutting
Oddly enough, numerous jigsaw breakdowns occur not only on moving parts, elements interacting with each other. Very often the device stops functioning (partially or completely) due to damaged electronics. To detect such malfunctions, a special instrument “multimeter” is required, which determines the characteristics of the current in the circuit of the device. It is necessary for a complete diagnosis, although some problems can be detected without it.
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The jigsaw does not turn on
Does not cut under load
Floating revs and burning smell
Sparking brushes during work
The procedure for removing a damaged stem with the installation of a new one is quite trivial and comes down to a banal analysis of the tool. Depending on the design of the jigsaw, you can access the element by unscrewing the front panel or the side panel, if the first is missing. The defective stem is removed and a new one is put in its place. When installing, pay attention to the moving metal parts located at the base of the stem. They must be positioned in such a way that they fall into the grooves of the upper mount and the metal frame serving as the base of the stem. The assembled structure must be abundantly lubricated with a thick grease such as lithol-24.
A more visual demonstration of replacing the stem can be seen in the video below about DIY Fiolent jigsaw repair.
VIDEO
Replacing some types of fasteners is much easier than finding these parts. To perform a similar operation with shoe and screw clamps, you do not even need to unscrew the tool body. Saw holders of this type are attached to the end of the rod with one or two screws, which makes it quite convenient to change them. In the case of some screw mountings, replacement will require removal of the stem for a more convenient and secure fixation of the holder.
In the video below about repairing a jigsaw with your own hands, the process of replacing a block type of fastening is clearly demonstrated.
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If things are relatively simple with simple saw holders, then replacing the quick-clamping one can cause some difficulties, especially for an inexperienced craftsman. To begin with, these types of mounts, according to the arrangement of the levers, are divided into radial, side and frontal.The first type is the most common and spare parts for its repair can be found, but the last 2 are unique, which can be ordered directly from the manufacturer. In the case of a radial type of fastening, you can purchase a repair kit and try to sort it out on your own, but it would be best to buy it assembled, along with a stem.
Due to erasing, or burning of contacts, jigsaw brushes are very often the main contenders for replacement. In some models of power tools, such an operation does not require removing the case and occurs by simply unscrewing a pair of bots. Unfortunately, the quick access function is not provided on all models, so we will consider a more common option.
First of all, you need to get access to the electric motor. To do this, we disassemble the case or remove a certain part of it. Further, in the area of the collector, we are looking for brushes and study the principle of their attachment. On different models of tools, the attachment of these elements can vary significantly. Somewhere they are pressed by metal plates, somewhere they are snapped into place with special levers, and sometimes they are held at all by the tool body. The replacement process itself does not represent some incredibly complex do-it-yourself jigsaw repair. It is enough to carefully remove the defective brushes and replace them with new identical ones. A similar process is clearly demonstrated in the following video.
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In the case of choosing the latter option, all the difficulty will be in the search, since the trigger must be absolutely identical to the standard one. Perhaps you are lucky and the necessary item will be found in the nearest store. It all depends on the place and model of the instrument. The installation process fully corresponds to the removal, only in the reverse order. We connect the wires to the contacts and twist the body of the device.
If you want to repair the jigsaw button yourself, we recommend that you familiarize yourself with the video below, in which this process is demonstrated in great detail.
VIDEO
Long service life and constant efficiency of the tool depend not only on the peculiarities of its operation, but also on the timely maintenance of its mechanism. Regular preventive maintenance will significantly reduce wear on parts, reducing the likelihood of serious breakdowns.
Carrying out a similar procedure will require only a screwdriver, a piece of cleaning cloth and a little grease. The whole process takes no more than an hour and consists in disassembling the jigsaw and carefully cleaning its parts. Most thoroughly it is necessary to clean and lubricate the gearbox and stem assembly. Prevention should be carried out as soon as the tool becomes dirty, based on the frequency of its use.
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The jigsaw is designed for cutting various materials. The design is simple, but breakdowns are also inevitable. Do-it-yourself jigsaw repair usually consists in replacing a blade that has worn out, fixing units, and a support roller. In the event of a breakdown of the motor, it is recommended that the device be returned to the master for repair.
Jigsaw device diagram.
How to determine if the jigsaw needs repair or preventive measures? There are a number of signs to look out for:
the body began to heat up too much during operation;
when switching on and further operation, uncharacteristic sounds are heard;
collector brushes sparkle;
the engine cannot be adjusted, there are other problems.
Replacing the jigsaw rod guide bushings.
When the listed symptoms are found, you must immediately turn off the jigsaw, then inspect it, determine the malfunction. All types of such breakdowns can be conditionally divided into 2 large groups.
Electrical breakdowns:
A factory defect in the form of a rotor breakdown (cannot be repaired, you must contact the service center).
The stator or rotor gets very hot during operation, there is a melting on the insulation. The reason is dust ingress, pollution, incorrect loading.
The brushes are worn out (replaced).
If the speed regulator does not work, then it needs to be replaced. It is best to contact a master.
Breakdown of the mechanical part of the jigsaw:
The internal structure of the jigsaw.
The gear has been found to have wear or deformation of the teeth. It is possible to repair the jigsaw, a complete replacement of the gear is required, in the future it is necessary to carefully monitor the loads, the correct choice of the blade.
The stem breaks, there are kinks on it. It is required to repair the jigsaw by replacing the stem, in the future, choose the right saws in accordance with the type of material. For example, for wood or metal, take only specially designed devices.
The balancers that guide the rollers are worn out. The balancers need to be replaced; in the future, you need to monitor the loads.
If the bearings are worn out, they are replaced. It is best to contact a master.
Other types of breakdowns can also be observed. For example, a strong impact may cause the body to split. Do not drop the jigsaw, in this case, you can damage other parts of it. It is best not to fix engine breakdowns with your own hands, but immediately contact the service center. Replacing worn parts can be handled by yourself ... To do this, the manufacturer provides instructions, following it, you can easily cope with the work yourself.
The main characteristics of household jigsaws.
How do I repair when I find a problem? The support roller can break if the load is applied too much, i.e. cutting technology is broken. The file is attached to this particular roller if it is broken, but the file cannot be used. To prevent a breakdown from occurring:
Use only high quality hacksaw blades.
Blunt files must not be used.
Hacksaw blades should be selected only in full accordance with the purpose. For example, for metal, only the fabric is used that is intended specifically for this material.
If the roller is not replaced when it is broken, the equipment may jam during operation. The repair will begin not with replacing the roller, but with cutting it with another tool and then replacing it. The renovation itself is not too difficult. The support roller with traces of damage must be removed, and then replaced with a new one corresponding to the used jigsaw model.
The blade fixation unit usually breaks when a large amount of dust gets on it. During operation, dust is not uncommon, therefore, for prevention, it is regularly required to clean the surface of the fasteners. Over time, the situation will get worse, the equipment may completely fail. Repair usually consists of completely replacing the retainer.
To prevent malfunctions, you can carry out regular preventive maintenance.
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It consists in performing a number of actions:
The assembly must be constantly cleaned and then lubricated.
During work, you must use a dust collector, which will prevent a large amount of dust from getting on the tool.
Repairs may be required in other cases as well. Breakdowns can be associated with physical wear and tear of the equipment.
VIDEO Replacement of certain parts is required in the following cases:
VIDEO
Video (click to play).
Jigsaws are usually easy to repair. The job is to replace the worn out part. To extend the service life of the equipment, it is necessary to follow the operating rules and carry out preventive maintenance. In case of more complex breakdowns, it is better to immediately contact the master.
