Electric meat grinder DIY repair

In detail: do-it-yourself electric meat grinder repair from a real master for the site my.housecope.com.

While scrolling the meat, a medium-sized bone accidentally fell into the meat grinder, after which it began to hum, but stopped rotating.

It is easy and simple to disassemble the meat grinder, for this in the lower part of the case you need to unscrew four screws with an ordinary Phillips screwdriver, after which it is very easy to remove the casing. After that, we remove the large gear by picking up and removing the split fixing washer in front of these.

When I examined the gear, I noticed that many of the plastic teeth were worn off. I had to change it, because I didn't want to pay 500 rubles for a new gear, I printed it on a 3D printer. Collected in reverse order, everything works

After they put crackers in the meat grinder, it began to crack and after a while stopped twisting, I had to carefully disassemble it in order to identify and eliminate the malfunction.

Disassembly is quite simple, first we remove the front gray panel of the latch from below, then we unscrew the five screws and separate the halves. Now you can clearly see the motor and the gearbox housing

We unscrew the four self-tapping screws on the gearbox housing and open it. We see broken teeth at the largest gear. It was not possible to find them on sale.Therefore, they were borrowed from the VITEK meat grinder, although the hexagon axis had to be slightly sharpened and the auger had a seat.

The meat grinder seems to be working, but at the same time it makes extraneous noise and sometimes pops, there were no such sounds before.

In order to repair the meat grinder, you will need to determine the source of the problem and disassemble the electric meat grinder.First of all, we will unscrew the screws, which are marked with red arrows in the figures below.

Video (click to play).

Now we separate our disassembly object into two pieces and see that it consists of two main units: a gearbox, in which plastic gears are installed, and an electric motor, thanks to which rotational movements are carried out.

Now you can disassemble the gearbox to check the gears and the engine.

After that, remove the gear cover. Plastic gears are installed each on its own rod. Remember the location of the gears, or better yet, take pictures of them if they differ from our image.

After dismantling the gears from the rods and examining them, I found fractures of plastic teeth on the smallest of them. The breakdown is unpleasant, because to repair the meat grinder, you will need to replace the gear, but it will not be so easy to find it, because you need to find either exactly the same killed device, or order its manufacture from a familiar machine operator. You can also try to order different sets with similar elements from China, but it is not a fact that you will get there.

In many models, the clutch is a calculated weak link, which must break first when the mechanism is jammed, so that the gears of the reducer and the electric motor remain intact. This sleeve breaks off only when it is sufficiently hard to jam. Such protection is relevant for meat grinders of almost all firms in which the gears of the gearbox are made of plastic. If overloaded in some models, the gear teeth can be ripped off. This will lead to more expensive repairs. And in this case, you can do it yourself by changing the special bushing, which is usually in stock.

The electric Zelmer meat grinder is, of course, more convenient in our household use compared to a simple mechanical meat grinder.

The electrical circuit of the meat grinder can be attributed to simpler circuits.

Zelmer electric meat grinder

As with every household appliance, the meat grinder has its own causes of malfunctions:

untimely care;
power surge;
mechanical damage

and other reasons. What can be attributed to untimely care? - Poor sharpening of the cutting edge of the knives is admissible. In this example, a load is created both on the electric motor of the meat grinder and on the electric circuit of the meat grinder, at which a malfunction of both the electric motor itself and the capacitor in the electric circuit of the meat grinder can occur.

You cannot name all the reasons at once. Let's say you bought a meat grinder in the winter, brought it home and plugged it in right away. In a warm room, condensation has formed on the stator windings, - you connected it and the electric motor of the meat grinder immediately burned out. It is also necessary to pay attention to the correct use of household appliances.

The mechanical part of the electric meat grinder is shown in Fig. 1.

In general, no clarifications on this part are required. Timely it is necessary to monitor the cutting part of the knife, as well as monitor the grate so that it does not become clogged with tendons from the meat.

The photo shows the electric motor of the Zelmer meat grinder, - with a gearbox.

In this unit, the cause of a malfunction can be both a malfunction of the electric motor itself and wear of the gear transmission of gears.

Consider the electrical diagram of the Zelmer meat grinder without additional elements in Fig. 2, an explanation in this topic will be given to the main causes of malfunctions of the electric meat grinder, such as:

The two stator windings of the electric motor are offset from each other by ninety degrees. The current in winding B differs in phase from the current in winding A, due to this difference, the initial start of the rotor is ensured.

The difference in the currents of the two stator windings is created by a capacitor, namely, the current value for winding B will be greater than that for winding A. That is, the capacitor in the electrical circuit here serves to ensure the initial acceleration of the rotor.

The electric motor of the meat grinder is asynchronous, the rotor speed of which lags behind the rotation speed of the stator magnetic field.

Consider some of the causes of a malfunctioning electric meat grinder. For example, your diagnostics established a capacitor malfunction. How to choose the right capacitor?

The tolerance in the deviations of the capacitance of the capacitor is not important, since the deviations in the capacitors are insignificant. Important characteristics are the capacitance of the capacitor itself and the nominal voltage value of the capacitor.

The next reason for the malfunction is a burned out electric motor. With such a malfunction, it is easier to replace the electric motor itself, if the cost itself is more acceptable for purchase.

These parts are available from the radio store. If the capacitor you need is not on sale, the capacity of the capacitor you need can be selected from two separate capacitors, let's say two capacitors. In this example, to increase the total capacitance, two capacitors are connected in parallel.

Minor causes of malfunctions include:

break in the mains cable wire at the base of the plug;
break in the wire of the network cable along its length

A general diagnosis of all connections can be carried out - with a probe. Diagnostics of the electric motor is carried out by the Ohmmeter device or by the Multimeter device, previously set to measure the resistance of the stator windings of the electric motor.

It's easy to guess: there is an electric motor inside the meat grinder, supplemented by a rotation speed control circuit. If we put aside the cases when it is necessary to replace the protective sleeve, coupling, repairing meat grinders with our own hands concerns the knowledge of the theory, the practice of the operation of AC motors.In electric motors, collector designs are more often used by consumer electronics; in industry, asynchronous ones dominate. Newbies will ask where the authors got their information from. We answer: according to the Ariston service department, since the 90s of the last century, collector motors have been replacing asynchronous motors in the household segment. Today, the percentage of the former reaches 85 of the total. On this bright note, let's start looking at AC electrical machines and control methods.

One often hears the statement: brushed motors work equally well on AC and DC. Let's say more: the alternating current loses part of its power, passing through the stator and rotor chokes, the inductance tries to delay the frequency. 50 Hz is a bit too much for a simple lacquered wire spool. Often, the stator windings are driven out individually, as they are. You can power one. Power suffers, losses are reduced, reaching a minimum size.

How easy it is to regulate an induction motor. Found two methods used by meat grinders:

Changing the amplitude of the supply voltage.
Commutation of windings.

It is clear that the first method requires the inclusion of additional elements in the circuit. I would like to notice about this! I happened to read on the forum about the domestic speed controller of an asynchronous motor, as if there were only resistors. The author hinted at the presence of a resistive voltage divider. But! When the active element operates in a linear mode - most regulators are built by thyristors - the resistance is far from infinity or short circuit. They put radiators, protecting the semiconductor keys, we will touch on the topic below. We would like to bring to the attention of the reader: there will always be losses.

A little blood is not enough. The grinder device contains a motor with two windings, a starting capacitor, the rotor is represented by a drum, we see a 100% asynchronous motor with a squirrel cage rotor. Let's meet a circuit with switching windings. As follows. One coil is wound around the periphery, connected through a capacitor, providing the desired phase shift. The second is wound at an angle of 45 degrees around the circumference, there is no phase shift. One is divided by two unequal windings. Each can be switched on separately, in parallel (together). Gives three speeds.

Let's add asynchronous motors to the theme. The manual for the repair of meat grinders will forget to mention a trifle: a thermal fuse designed for 135 degrees is often placed inside the windings. Foreign elements are often decorated with the letter F, the number has little to do with Fahrenheit. Unlike Elenberg transformers, where the braid honestly writes: there is a thermal fuse inside, asynchronous motors are often devoid of mention. Call the windings: one suffers a break, patiently inspect for different elements hidden between the wire. It can be difficult to do, believe me. The first glance shows only copper, the second - copper, the third - an element of protection is noticed.

The thermal fuse is found, it should be evaporated, ringing. With a positive breakage test, get a new one, solder instead of the old one. Can you guess why you can't short-circuit? Right! The next time it is not the thermal fuse that burns out - the asynchronous motor, the hassle will increase. Similar radioelements are found in many products, there are no special requirements. Surely there is a suitable specimen at the flea market. Be careful not to tinker yourself. As is the case with the regulation of the speed of induction motors. The method of dividing the voltage by a thyristor is suitable; in practice, current cut-off is used.

The supply voltage is supplied bypassing the brushes in series on the rotor and stator. The direction of movement of the shaft is determined by the direction of the windings.
The current flows through a thyristor switch controlled by the sum of the voltages.

The source of the switching signal shaping determines the complexity of the circuit. Brush motors spark. When switching sections, a back-EMF occurs. Directed opposite to power supply. Apply feedback. Through a capacitor, the back-EMF diode is added to the thyristor control electrode. The more the amplitude, the less the gateway is open. The motor starts, or the load increases - the speed decreases. The amplitude of the self-EMF becomes less, the key current increases, and the engine returns to the mode. Needless to say, how important it is to keep the speed constant, the circuits solve this problem. It is clear that part of the power is lost on the key, the inevitable payment for stability. The speed can be adjusted separately via a variable resistor. Who is interested - you will find good options here

The meat grinder is open, we begin to inspect the engine. It is necessary to measure the resistive input resistance. If a capacitor is visible in the circuit, we define it as an open circuit, it is misinterpreted, considering it a breakdown. To repair the grinder yourself, check the proposed engine type. Traditionally collector, it is easy to recognize, thanks to the characteristic drum, broken by segments, two graphite brushes are diametrically adjacent. Asynchronous motors are sold with squirrel-cage, phase-rotor options. In the first case, the rotating part is devoid of electrical contact with the stator, the power source, in the second, there is a pair of rings supplying current to the rotor windings.

The difference between an induction motor with a phase rotor - the shaft is devoid of a segmented drum, there is no pair of brushes. Repair of electric grinders is carried out according to the type of engines. The asynchronous entry is ringing anyway. The collector engine is not enough.

We will ring the section, rotate the shaft, measuring the resistance of each step. The values must be equal. The process stops - the turnover is completed. In collector motors, the stator is often made on a single coil. It is connected to the rotor by a magnetic circuit, represented by a core with wire turns. Do-it-yourself meat grinder repair will be a freebie. Even if the wire is burnt in the center, always buy a roll of a new one with lacquered insulation in the store, wind the required volume with your own hands.

They use a device formed by two pairs of racks mounted vis-a-vis on a long board. Each has a rotating axle. One holds a new spool, the other holds a coil of wire. Here you wind up the old choke to localize the break, how many turns to wind, what is the length of the wire. Most people use a handle, like an old barrel organ, it is allowed to use a screwdriver drive, a drill. Determine the speed so that it is convenient to lay the turns tightly. With the shuttle, the other hand guides the wire from side to side, from edge to edge of the spool. In conclusion, we will ring the coil and measure the electrical resistance.

Repair of induction motors is determined by the design. The stator is repairable. The configuration of the rotor windings is complex (if any). However, if there is a lot of strength, time, desire to practice, it is impossible to stop the master. Let the day be spent, the engine again works as part of the meat grinder.

Winding direction.

Number of turns.

Location of terminals.

Three whales will help to correctly position the wire, it is allowed to combine it with neighboring coils, enlisting the help of soldering, applying insulation at the place of electrical connection. The main reasons for the breakdown of meat grinders are the consequences of improper operation. More often, there are two gross violations on the part of users of household appliances:

Exceeding the permissible time of continuous work, underestimating the duration of rest. The parameters are not advertised by manufacturers, not all meat grinders contain protection against overheating. Users are deprived of information about the features. Housewives are losing blenders. The motor breaks easily.

The second oversight is getting hard bones under the auger. Repair of the Zelmer meat grinder consists in replacing the protective sleeve. Sometimes you have to buy a set of spare parts.

Capacitors burn, swell (electrolytic on filters). Call, conduct a visual check: one side sticks out. The butt is pressed through with a cruciform recess. Bends outward. Burnt capacitor - consider a favorable outcome. Happy repair to everyone!A meat grinder is simply an irreplaceable device for grinding different types of meat. If earlier most housewives used manual machines, now more and more users prefer electrical devices. This is not surprising, because the electric meat grinder grinds meat of any quality in a matter of minutes, saving the hostess's time and effort.Unfortunately, all electrical appliances tend to break down, and repairing them is somewhat more difficult than manual ones. This article will tell you how to repair a meat grinder at home, and what you can do with your own hands.Manual meat grinders are made entirely of mechanical parts. When disassembling, it is always easy to see the breakdown and replace the damaged part with a new one. Moreover, all the components are easy to find on sale.There is nothing special to break in manual-type meat grinders. Most often, they have dull knives that can be easily sharpened with a fine grinding wheel. Such a circle is put on the axle of the meat grinder instead of a mesh for the output of products and rotary actions are performed with a handle, as when grinding meat.Occasionally, a strong squeak is possible while the device is operating. Then you should disassemble the mechanism, grease the place of rotation of the handle so that the grease does not get to the meat container.All parts of hand-held devices are made of metal and cannot break if sinewy pieces or small bones hit, as a person will definitely feel tension at hand and clean the mechanism. The exception is modern manual meat grinders, made of fragile metal.All electrical meat grinders, regardless of manufacturer, consist of:

engine;

gearbox - consists of several bearings and gears for transferring the power of the motor to the rotational movements of the cutting mechanisms;

knife systems (auger);

control unit;

power cord.

The main reasons for the failure of all brands of electric meat grinders is their misuse. Only a small percentage depends on poor build quality. The quality of the parts themselves depends on the reliability of the manufacturer. It is not worth saving on it, since repairs can be much more expensive, and it is not so easy to find parts on sale.The most common malfunctions of meat grinders:

the device does not turn on at all;

the meat grinder turns on, but the disc does not grind the product;

the drive works, but does not gain the required number of revolutions;

you hear fumes or smoke during operation;

increased extraneous noise or knocking, which were not previously noticed.

Not always, with the slightest breakdowns, you should take the device to a service center, where it can successfully lie for many weeks, and you will have to pay decently for repairs.If the meat grinder does not turn on at all, the cause of the breakdown may be in the absence of contact or a malfunction of the control panel.Disassemble the device by unscrewing all necessary screws. Sometimes the plastic parts of the case snap together, then you should find all the grooves and snap them VERY CAREFULLY. Otherwise, the case may be damaged, then it will not be possible to fold it back. An example of the case disassembly can be found in the pictures of the "SCARLETT" model disassembly.SCARLETT meat grinder disassembly diagram: unscrew the metal panelSCARLETT Meat Grinder Disassembly Diagram: Remove the Mounting ScrewsSCARLETT meat grinder disassembly diagram: get the gearboxCheck all the contacts, the connection of the power cord to the device, maybe something needs to be twisted or soldered.If the meat grinder turns on, but the auger does not grind the product, the reason may be a faulty gearbox. Bearings could have crumbled or gears could be worn out from a heavy load or hit by bones.In this case, disassemble the relay, check all parts for defects. Whether the gears scroll easily, are all the teeth present, are there any extra backlash when moving. Switch on the disassembled device without loading the auger.Do this carefully so that all parts do not fly to the sides and something does not interfere with the operation of the engine!Do not forget to photograph or memorize the location of the parts, so that later you do not puzzle over what to put where.Relay breakdowns are the most common reason for a meat grinder to fail.If the cause turned out to be defects in the gears (which is very likely, since they are made of plastic), the damaged parts should be replaced with new ones. It is not so easy to find new gears on sale, they are not sold separately for most models. You may have to contact local services to buy the necessary used part from another device or try spare parts from other models.In some rare cases, the cause of the auger turning interruptions may be the wear of the socket for its fastening or the misalignment of the shaft. This can occur from a constant increased load on the device or improper manufacture of a socket from a metal that is too soft. Loosening of the auger and licking of rotary mechanisms is a very big problem. To eliminate it, you will need the help of specialists.If the grinder is working, but not picking up the required speed, most likely an overload has occurred. This problem is most common in Kenwood mg devices.The device should be disconnected from the power supply, disassembled, cleaned and cut the meat before serving into the meat grinder in smaller portions.The main reason for extraneous noise, knocking in the operation of devices is the ingress of unnecessary objects inside: small bones or veins. They can get stuck and clog the joints between different parts of the appliance. Also, on insufficiently washed parts after previous use, food particles can dry out and cause blockages.In such cases, the device should be disassembled, cleaned, and all foreign objects removed.Sometimes the cause of extraneous noise and sharp sounds in the operation of the electric meat grinder can be crumbled bearings. They are easy to find on sale and replace.If you hear fumes or smoke from a working meat grinder, most likely the reason is engine breakdown.To repair the motor yourself, you will need some knowledge of electrical engineering, the direction of alternating current, adjusting the operation of a synchronous and asynchronous motor. If there is no such knowledge, it is better to immediately contact the service center. But, at the same time, the importance of repairs should be appreciated.The cost of repairing a motor is usually very high, so sometimes it is easier to buy a new device under warranty than to repair an old one.If you have certain knowledge, it should be borne in mind that both spirals of the electric motor winding are offset from one another by 90 degrees. In the second winding, the currents differ in phase. As a result of this difference, the rotor starts. The difference in currents is created by the capacitor. It is used to provide the initial acceleration of the rotor.Electric meat grinder motor and rotorThe motors for household electric grinders are asynchronous. In them, the rotor speed lags behind the stator magnetic field. A damaged capacitor can be the main cause of a grinder breakdown.If the capacitor is damaged, it should be replaced with a new one.When buying, pay attention to the capacity and voltage rating.If one of the windings is burned out, the motor must be rewound.In any case, before repairing a meat grinder at home, you should evaluate your strength and knowledge so as not to aggravate the breakdown.The electric assistant today is very popular and in high demand among Russian buyers. Despite high-quality manufacturing and high reliability in operation, electrical appliances tend to break down over time. Many breakdowns can be repaired at home, so we will tell you in detail about the repair of an electric meat grinder, which you can easily do with your own hands.It doesn't matter what kind of meat grinder you have - Kenwood, Zelmer or Moulinex, each of them has its own nuances, but the faults are pretty typical for all. Electric meat grinder repair specialists have compiled the following register of the main problems encountered in these products:

violation of various contacts of the electrical circuit;

deformation of the engine rotor;

breakage of the teeth of the gears of the reducer - arises from the increased load;

malfunctions of the electric motor, extreme wear of the brushes;

wear of the cutting tool due to the processing of too stringy meat, the ingress of small bones due to the user's oversight;

breakage of keys, safety devices;

damage to insulation, power cord;

replacing the motor or rewinding its windings.

Many failures of reliable technology are due to violations of operating conditions and only a few - a factory defect or a human factor during assembly.If any malfunction occurs, it is necessary to immediately carry out diagnostics in order to find out the cause and localize the breakdown. Inspection of the mechanical part of the product is carried out visually, and the electrical circuits are checked with special devices. If a visual inspection of all parts of the mechanical part did not give a positive result, then you need to dismantle the product and inspect the gearbox, electric motor. May have happened clogged lubricant rubbing parts, the bearings do not work correctly, they need to be replaced.Timely diagnostics allows you to identify and eliminate malfunctions at an early stage of their development, which significantly extends the life of the entire product.Let's consider in detail the malfunctions of the meat grinder and methods of their correction.

The engine does not reach the set speed - the reason may be broken switch or the engine itself. Replace worn mechanisms or an electric motor.

Interruptions observed in the drive - extreme wear of graphite brushes, you need to install new ones.

Image - DIY electric meat grinder repair

Extraneous sounds, burning smell during product operation - defective engine... To restore it, you need diagnostics, repair or complete replacement. However, the cost of replacing the engine is quite high - it would be more cost effective to purchase a new grinder and solve the problem.

The reason for the appearance of sounds unusual for the normal operation of the meat grinder may be bearingsthat wear out during operation. To confirm the diagnosis, it is necessary to disassemble the main body of the product, get to the place of their installation and check the rotation, if necessary, replace it.

Reducing the speed of the electric motor - overload, the food is fed too fast, the meat grinder does not have time to grind them. The Kenwood mg model is particularly susceptible to this malfunction. Reduce the feed dosage and everything is normalized.

No shaft rotation - the transmission mechanism of the reducer is seized... Perhaps one of the gears or its teeth is broken and needs to be replaced.

The product auger has stopped. If at the same time the engine is operating in the same mode, then turn off the meat grinder and dismantle its mechanical part in order to find out the reason.

In the latter case, there are several reasons for the occurrence of such an unusual failure: incorrect assembly of the gearbox, cranking of the motor shaft, breakage of the drive gear teeth, and very rarely licking of the connection by the auger shaft (erasure of the hexagon).

On a note! The non-conformity of the metal of the part leads to its breakage during the ultimate load.

If the hexagonal receiver, where the auger shaft is inserted, is made by mistake of a softer metal, then during operation it quickly expands, or its edges wear off, the tight contact will be broken... The same can happen with the auger tip. It is difficult to repair a meat grinder with such problems with your own hands; the help of professional repairmen of similar equipment is required.

In order for the electric meat grinder to delight you with flawless work for a long time, you must follow simple recommendations for proper operation:

before starting work, always carefully check if the assembly is correct and reliable fixation of all parts;
pay special attention to the contact between the cutting tool and the grate - they must fit snugly, the fixing nut must be tightened with effort;
cut the product into piecesnot exceeding the diameter of the loading cylinder, in order to avoid them getting stuck;

disassemble, clean and rinse all parts and the internal volume of the meat grinder after each use;

keep all parts of the mechanical part of the product only disassembled.

Special attention! Before processing meat and fish, it is necessary to free them from bones, remove large veins, make sure that small bones that can damage the knives do not get inside the product.

Do not turn on the meat grinder without loading, do not try to push through the stuck pieces of food with your hands - there is a special pusher for this, never overload it. If you thoroughly fulfill all the requirements, then the product will work flawlessly for the entire period assigned to it by the manufacturer, and she will not need repairs with her own hands.

Do-it-yourself electric meat grinder repair, causes of breakdowns and malfunctions.

Experts refer to the schemes of electric meat grinders as simple options, but for the layman, even they can turn out to be difficult. Typically, an electric grinder breaks for the following common reasons:

- Improper care. This is a poor sharpening of cutting knives. Because of this, an additional load is created on the engine and the electrical network of the device, due to which over time it breaks down;

The electric motor of the meat grinder burns out due to the fact that condensation forms in it. It is simply impossible to list all the reasons why this can happen. For example, a new device was brought from the cold and immediately connected to the network, turned on. The electric motor will immediately burn out due to the formation of condensation on the stator windings.

In order to avoid breakages, it is necessary to monitor not only how sharp the knives are, but also behind the bars. They should not be clogged with tendons from meat, and if this happens, then timely cleaning is required. Such correct operation will help to exclude more complex breakdowns, for the repair of which it will be necessary to disassemble the device and work with circuits.

Electric diagram of a meat grinder (without additional elements)

If the malfunction is such that the meat grinder needs to be disassembled, then you should know how to do it correctly. The explanations in this part of the article relate to the moments when the electric motor of the device or the capacitor failed.

Two windings of the electric motor are offset relative to each other. The offset is equal to 90 degrees. In the second winding, the currents differ in phase, and due to this difference, the rotor is started. The difference in currents between the two windings is created by the capacitor. This means that the current value for one winding will always be higher than for the other. A capacitor is needed in this electrical circuit in order to ensure the initial acceleration of the rotor.

The electric motor of the described household appliance is asynchronous. This means that the rotor speed lags behind the rotation speed of the stator magnetic field. If, when disassembling the device, it is found that the capacitor is faulty, this is the main reason why the device does not turn on.

How to choose a capacitor

The values do not have a tolerance in the deviations of the capacity of this part. Because the deviations will be minor. An important characteristic is the capacitance of the capacitor, as well as the nominal value of its voltage. When the correct part is selected, then to repair the device, you just need to replace the old capacitor with a new one.

If the electric motor burns out

The engine needs to be replaced again. But here you need to watch that the price of a new part is not higher than the price of the meat grinder itself. When such a situation arises, it is better to buy a new electric meat grinder with a free service guarantee. You can see the cost and range of electric motors in the store, in the radiator department.

Other possible malfunctions:

- Sometimes the device does not work due to the fact that there was a break in the mains cable at the very base of the plug. Here you just need to replace this part;

- Sometimes the cable can be damaged along its entire length, for repair it will be necessary to completely replace it with a new one;

In general, if there is no relevant experience, you should not go inside the device. Many problems can be fixed at home by a person who is at least minimally familiar with the principles of household appliances. But for the correct operation of the devices so that it breaks down, the hostess will be able to keep track of herself.

More and more often, in the trade market and even in large mega-tech centers, buyers ask sellers about the guaranteed level of reliability and the quality of the purchased goods. Some people really want to sell the product. Others want to buy it, but a third party produces what someone will buy anyway.

Believe it or not, a lot of brand-name products are often ‘children's toys’.

Another indignation of the hostess was caused by the recently purchased electric meat grinder. In the assembled state, when the electric motor is turned on, the auger rotates. When feeding the product for chopping into the auger chamber electric meat grinder auger stops even though the motor runs non-stop.

There are several reasons that can cause such a malfunction.

Inaccurate assembly of the transmission mechanism.

Sometimes the ‘curious’ owners of electric combines or ordinary electric meat grinders are drawn to carry out maintenance, which often ends in ‘technical murder’ or ‘mutilation’ of the kitchen unit.

During such services, hammers and other tools for other purposes are used. Lubrication of rubbing parts with sunflower oil or complete removal of factory grease. Replacement of parts made of inappropriate material, repairs using inappropriate glue, open fire, impacts. With this technique, skews appear in the axes of rotation, chips, an uneven gap in the teeth of the gears.

Breakdown of the electric motor shaft from the drive gear of the reducer.

The drive gear of the reducer is mounted directly on the rotor shaft of the electric motor. On different models of an electric meat grinder or food processor, the gear is fixed on the motor shaft through a key, pin, through lock, spline connection or pressing.

Due to jamming in the gearbox, with excessive load on the auger, overheating of the electric motor with heat transfer to the shaft, the fixation between the electric motor shaft and the drive gear is weakened. It breaks the splines and the key, and with a locking connection with a through lock, the gear breaks, the pressing weakens immediately. In such cases, the rotor shaft of the electric motor rotates freely in the drive gear housing.

But when the gearbox is still reliable, stopping the electric motor can lead to overheating of the electric motor windings and its failure.

The auger in the chamber without load can rotate intermittently or evenly, but slower than usual and with a characteristic sound. Electric meat grinder gearbox also has its own sound, which is also manifested in good condition.

Broken teeth on the transmission gears of the reducer.

A similar case is rare and more on old units or on an assembly with low-quality material. When the teeth of the gears are worn or when the gap between the teeth of the intermediate gears is uneven, one of the gears of the reducer jumps tooth to tooth with jamming or breaks loose teeth, the fragments of which fall into the gaps between the remaining teeth of the gears.

When the teeth on the gears break off or the gears of the reducer wedge 'tooth to tooth', the rotor shaft of the electric motor can turn in the drive gear housing with a press-fit connection or tear off the pin, key or retainer.

Rotation of the shaft in the drive housing or in the driven plastic gear wheel of the gearbox.

Modern electric meat grinders are usually equipped with synchronous electric motors with sufficient shaft power.

When the gearbox jams when the electric motor is on, the connection between the motor shaft and the drive gear is often weakened. Can tear off a key, pin, slot. The fixation of the motor shaft with the drive gear will loosen and the shaft will turn in the gear itself.

In the case when the gearbox is made of durable material and assembled without violations of the assembly technology, there is a rotation of the driven gear on its shaft, the elongated part of which serves to transfer rotation to the meat grinder auger through the 'shaft to shaft' connection. But this very rarely happens when the rotating auger is completely jammed and its shaft and the driven gear shaft are tired.

And the most unpredictable and not uncommon reason is ‘licking’ of the driven gear shaft of the reducer by the auger shaft.

The hardness of the steel used for the auger shafts and the driven gear of the reduction gear is insufficient. The steel is soft and very easily amenable to any cold work. There is even a trace of a simple kitchen knife.

With the next assembly of the auger chamber for chopping some product, the tightness of the 'shaft to shaft' connection between the auger shaft and the driven shaft of the gearbox weakens over time. The connection gap increases and there comes a moment when, with an increase in the load on the meat grinder auger, the shafts rotate relative to each other. The edges and edges of the shafts 'lick' and the stronger the softer the steel and the greater the load.

It happens that the manufacturer did not provide for the full compatibility of parts and completes his product with parts only in some parameters, that is, it corresponds to the diameter - does not correspond to the length, corresponds to the length and diameter - does not correspond to the fastening. And the main discrepancy is the discrepancy of the material for the parts used to the expected degrees of stress on them.

The first photo above shows that the auger shaft was not fully fitted onto the driven shaft of the gearbox. The reason is simple: the auger shaft was made 6 mm shorter and the effective connection area was less than envisaged - only four millimeters. Either the auger from other models, or the auger shaft is made ‘their own way’ or with defects.

Corrected such a defect in a meat grinder using electric welding and emery stone.

The auger shaft was shortened by 3mm and a prepared X8 hex socket was welded to it. Thus, the shaft was increased by 14 millimeters, since the head had a length of 17 millimeters.

The rest is simple. On an emery stone, without a strong pressure, they grinded off the head so that in the assembled state the driven shaft of the gearbox would fully enter the auger shaft, and when the knife was installed, the grate would not completely enter its seat.

Video (click to play).

The clamping nut can be used to adjust the tightness between the knife and the grate, which affects the quality of cutting the product and the operation of the kitchen unit as a whole.

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