Upper thread tears in the sewing machine

What to do: sewing machine rips upper thread?

When the upper thread is torn in the sewing machine, a favorite activity for many mistresses turns into a real torture. First of all, such a situation occurs when the master clamps the thread in the tension regulator too tightly. the material simply cannot withstand the load and breaks. If you are convinced that loosening the tension does not lead to a positive outcome and the situation does not change, then you should consider the more serious problems that are often faced by seamstresses.

Another very common case leading to rips can also be related to tension, but in this case, on the contrary, weak. If the material lacks tension, it can tear because the hook is pulling it into the groove, resulting in loops. You have to watch the thread tension and adjust the nut in the right direction. If it is torn and twisted directly in the regulator. you are not using enough quality material, which should be replaced. Pay attention! Before using the thread, make sure that there are no knots and visible defects on its surface. Always choose quality products.

What can be done independently, and when it is better to call a master

When the machine rips and tangles the threads, It will help you:

  • Adjusting the tension;
  • Check that the thread-needle pairing is appropriate for the particular type of fabric;
  • Correct installation of the needle;
  • Proper threading;
  • replacing the defective needle with a new one.
upper, thread, tears, sewing, machine

If after performing the designated actions machine continues to break the thread. the source of the problem lies in the faulty internal parts of technology (eg, in the mechanism for advancing fabric). Self-disassembly device and unqualified adjustment will lead to bad consequences. from the emergence of additional defects to the complete uselessness of the technique for repair.

Why the upper thread is torn? We analyze the reasons.

The specialists of A-Aisberg Service Center will make the diagnosis, detect the source of damage and deliver it in two-three hours at your home. Long-term practice and knowledge of design features of machinery from different companies allow us to take machines from all recognized manufacturers (Janome, Jaguar, Juki, Bernina, etc.).

The quality and the right choice of sewing accessories

Bad thread is one of the frequent circumstances of line breakage. When sewing, you should avoid very twisted fibers, also do not use old Russian 0 thread, because they often do not withstand the standard tension and can have knots on the surface, bulges and other flaws. Tearing can occur near the bobbin, under the needle or anywhere else.

Stitch breakage also occurs when using a huge bobbin cross-section. These bobbins are designed more for industrial machines than for domestic machines. Too much weight of the yarn and the cross-section of the bobbin interfere with the even tension of the fiber and its measured feed.

Defective needle. another cause of the problem. If you find a curvature of the tip or at least some other defect, the needle must be replaced. Often the thread is torn if the wrong needle size is selected when working with very dense fabrics (cotton, leather, canvas, wool).

Proper selection of sewing accessories will allow to avoid breaking a stitch almost always.

Call the master

To drop the application for professional repair is painfully simple. Complete the online form or call us by phone:

If the sewing machine rips thread, the source of the problem can be found in the malfunction of individual parts of the design, as well as in the wrong settings or the wrong choice of sewing accessories. This is one of the most common problems, faced by owners of manual and automatic machines of different manufacturers. from Singer, Brother or Pfaff, imported from other countries, to thrifty Russian models like Podolsk or Chaika. In some cases, you can remove the defect by yourself, but in most cases you need to call the wizard.

Specialists SC “A-Aisberg” do sewing machine repair at least a level of difficulty. All works are fulfilled at home without lifting equipment into the workshop, allowing the customer to save time and money. To call the master call 8 (495) 213-11-90 at any time from 7:00 to 23:00 or leave a request on the website with contacts for feedback.

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Damage to the needle plate and hook

With long-term saturated use of the machine inside the holes needle plate can show jagged edges, roughness and other flaws on which the thread will cling and tear. If there is little wear and tear, the defects can be removed by grinding the hole with a diamond stone. If this does not help. you need to put the latest plate.

Malfunction in the hook mechanism leads to breakage of the upper thread due to very strong tension. With all this machine grinds and knocks. Failure is solved by 2 methods. setting the hook in the correct position or cleaning the inner place of dust, fabric fibers and other impurities. If this is not the case, the hook or the entire machine must be replaced.

Poor thread quality

Sometimes it is not possible to create an even stitch because of problems with the technique. When checking why a sewing machine rips thread, it is worth examining the consumables themselves. Mismatches in spool and fabric or needle numbers often lead to these results. When stuck in the ear at high speed sewing machine rips upper thread. A simple replacement with a thinner one that matched the matter and the needle would solve the problem. If a thread breaks when sewing, you should check its quality. Sometimes materials that have been in stock for a long time are sold. In addition, cheap thread is often of extremely poor quality simply because the manufacturer used low-grade raw materials.

When looking for a reason why a sewing machine rips thread, it is worth looking at the needle. It is in direct contact with both the material and the mechanism, it can break and lose its sharpness. Servicing a sewing machine, it is worth carefully inspecting all of its components. Needles should be replaced periodically, especially if they have been pressurized, there is deformation. When the sewing machine is in operation, especially when the upper thread is often torn, it is this element that is checked as one of the first.

An unobvious cause of thread breaks

Why does the upper thread of a sewing machine break??

  • Incorrectly installed needle, read more about this in the article “How to insert the needle into the sewing machine correctly”
  • The upper thread is incorrectly threaded;
  • The upper thread has too much tension or vice versa too little tension;
  • Thread is torn because of serrations on machine parts: needle, needle plate, hook.
  • The thread tension mechanism is incorrectly assembled;
  • Thread and/or needle of inadequate thickness The upper thread can break if poor quality thread is used: uneven in thickness, knots, time-worn, and poorly twisted (shaggy). Also, if the thread has an unbalanced twist.

We will not go into the details of the production of sewing threads and find out why you get unbalanced twist, let’s go straight to practice.

Unbalanced thread creates loops, such as the photo below (the photo is enlarged by clicking)

Loop caught between the plates of the thread tension mechanism, jams, pulls up and breaks.

And usually the seamstress has no way of knowing what is going on, t.к. the mechanisms are fine, the thread tension is correct, there are no knots in the thread, no bent fibers either, after threading the machine sews well again for a while until the next break

The only thing you can feel before the thread breaks is a very strong tension in the upper thread. the thread stretches like a string and breaks. Everything happens very quickly.

The intervals between breaks may be more frequent or less frequent, it all depends on the particular spool of thread.

In the sewing industry, such threads are usually reclassified as defective and are not used.

If your upper thread tears for some unknown reason, check the threads for balanced twist

How to check the thread for balanced twist?

The balance of the threads in torsion is determined as follows.

upper, thread, tears, sewing, machine

A length of I m yarn is folded in half. If the thread is balanced in twist, it will hang in a loop (Fig.a), and if it is not balanced, it will twist (Fig.б). For a balanced thread is allowed no more than 6 turns on its hanging part of 1 m of thread.

Unfortunately, often the thread has not 6, but many more turns, in the video below you can see it with your own eyes (the video, of course, bad quality, but the way the thread is twisted, you can see perfectly)

Very often unbalanced twist is found in ideal, dor tak and similar threads.

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What to do if you bought a spool of unbalanced thread?

I do the following. I wrap a strip of fabric around the sleeve of the sewing machine, pass the thread under this strip of fabric. A strip of fabric prevents the thread from twisting into loops.

Here’s a simple solution to a complicated problem.

By the way, unbalanced by the twist thread can not only lead to thread breaks, but also be the cause of skipped stitches (this happens not as often as thread breaks).

How to fix the cause yourself

The most common causes of thread breaks are the materials used improperly. In that case you just need to review all the threads and needles for defects, and change them.

Also need to check the tension of the thread. Properly adjusted tension must weave the thread from the inside, not on top of the material. It is best to adjust only the tension of the upper thread. Adjust the bottom part only in emergency situations.

If the tie has become tight, and the material began to wrinkle, it is also due to improper thread tension. In this case it is necessary to make adjustments to both the tension and the length of the string. Increase the length for thick material and decrease it for thin material.

If the tension is normal, check if the needle is correctly positioned in the hole in the plate. To do this, turn the wheel slowly, and with a magnifying glass, make sure that the needle does not touch the walls of the hole.

Make sure the spring is in the correct position. If the main part protrudes in the wrong direction, it must be turned around. If the slit is too tight, unscrew the nut a little.

You also need to make sure that the regulator, which controls the voltage, is properly assembled. What the sewing machine instruction manual will be needed for. You need to pay attention to both the correct location of the parts, as well as the side in which they are unfolded.

It is not uncommon for thread breaks to occur after disassembling various parts of a sewing machine. Usually, the problem is in the improper mounting of the pusher. if this part is accidentally installed the other way, when the flattened part of the pusher is turned toward the lever, it will definitely lead to breakage. Sometimes this element is not installed at all. You should also pay attention to the squeeze washer, it’s probably not installed correctly either.

If the machine has recently been disassembled, you need to make sure that all the elements are in their places, they are not deformed and securely fastened. If any part is missing, it must be ordered.

Important! often than not, the problem of a thread break can be fixed yourself. But if after all the activities carried out the problem remains, it is necessary to refer to the adjuster.

Why does the sewing machine brother rips the upper thread? Repair with your own hands.


What to do if your new brother sewing machine constantly rips the upper thread. Let’s together try to fix this problem with their own hands at home.

Yay! You have a new Brother sewing machine!

Compared to a mechanical one or an old electric one (almost a rarity) this is fantastic.

And here you are, almost ready to believe in miracles and relax, as your miracle out of the blue begins to tear the thread. And rips, and rips.

You do everything according to the instructions, read the manual, change the thread, change the needle, turn all the adjustment wheels and nuts, but nothing helps.

We turn to the all-knowing Internet, and there are the same advice from the instruction manual (which you have already fulfilled for the hundredth time). And at the end a wise recommendation. contact the master.

Of course maybe you’ll be lucky and you’ll come across the magic saving phrase of a specialist. clean and remove the jammed thread from the upper thread tensioner, or otherwise from the upper thread tension spring But where is it and what is it, is a second question.

After all, looking at the machine we see only a slot in the body, into which we pull the thread, but what happens to it inside the body we have no idea.

And believe me, even if you remove the casing, you will not immediately understand where to look for this cherished mechanism.

Let’s try to help with our advice to anyone who has faced the same problem.

1 First, you need to unplug the sewing machine from the network. All actions will be performed with the power off.

2 Unscrew the screw on the front cover of the housing (it is the only screw, it is not difficult to find).

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3 And now the main thing with the help of our photo find the mechanism, but simply speaking two parts screwed together by a big screw, which clamp our thread.

upper, thread, tears, sewing, machine

To make it easier to get to it, gently turn the spinning wheel back and forth.

4 And then it’s a matter of technique. If you have found the mechanism, it’s not difficult to find the jammed thread. It is better to remove it with tweezers. Sometimes there is not one but a bunch of threads, you should try to remove them all.

5 After our procedure is finished screwing the front cover back on. The procedure is finished.

Perhaps you have some information. how to prevent thread jamming and thread breakage in the upper thread puller mechanism.

Maybe you just need to lubricate the mechanism or put a gasket to prevent it from further clogging.

We will be very grateful for your suggestions in the Комментарии и мнения владельцев below. We and all visitors of our site will be glad to get your Комментарии и мнения владельцев.

Hopefully after that your machine will stop being capricious and will please you in the future!

Other problems

There are other circumstances that can affect stitch quality and cause the thread to tear at the most important moment:

  • If all possible causes are tried and tested, but the sewing machine is still ripping thread, it may not have been subjected to preventive lubrication for a long time. Parts and assemblies must be well lubricated to move easily and not tear threads in the sewing machine.
  • Make sure that the thread comes evenly from the spool mounted on the sewing machine. it is not tangled on the spool or on the holder on which it is mounted.
  • Upper and lower threads should be the same thickness.
  • A blunt or deformed needle should be replaced without regret. must be careful not to miss any holes or grooves.
  • Having dealt with the problem of a broken upper thread, you may encounter such a malfunction as looping stitching. This sometimes occurs due to excessive loosening of the tension control. Or if you forgot to insert the spring that holds the discs in place.

After checking each of the possible causes, you can almost certainly find the source of the problem and adjust the sewing machine yourself. For complex faults, you may need to call in a technician, who will fix serious malfunctions and adjust the sewing machine’s operation.

You can also read an article on our site about overlock stitches and their differences.

Needle malfunctions

Top thread breaks in the sewing machine and sometimes due to trivial wear and tear or damage to the needle. Relate the size and grade of the needle very carefully to the density and thickness of the fabric to be worked, as well as the characteristics of the thread. Breakage can occur due to the difficulty of passing the needle through the material, too sharp needle ears, which lead to breakage time.

Compensation spring. an important element for the formation of proper stitching, which holds the upper thread in the right tension. Too much tension can cause the thread to overstretch and break, while too little tension can lead to loops. Depending on the model of the machine, you can adjust the tension of the compensating spring to the right values. If the spring was broken, incorrectly installed or damaged during disassembly of the sewing equipment, you have to urgently resolve the problem, otherwise you will not be able to achieve high quality sewing.

Manhole breakdowns

If the part was not installed correctly at the factory, install the hook correctly so that the sewing machine performs its intended function.

If the pusher is low in relation to the hook, disassemble the sewing machine assembly and put under the pusher ring threaded bushing.

If there is misalignment between the needle and hook, release the crank clamps, put it in the correct position and secure it in the housing.

The surface of the hook should be smooth, not rough. This is not difficult to achieve with sandpaper and felt wheel.

If the impact of the pusher causes a pothole in the shuttle, you will need a diamond file to level it out.

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