The Best Self Threading Serger Machines Guide- Top 3 Reviews

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As there weren’t enough machines in the world of sewing already, a new family member just turned up around the block. And this one’s another one that will step up your game without a doubt: the self-threading serger. Although the serger itself already has a prominent place in most sewing rooms and ateliers, the self-threading version of this nifty device will spare a lot of frustration when threading a serger manually. Therefore, a self-threading variant is expected to take the place of the classic good old serger as we know it and will partner up so well with your regular sewing machine.

The fact that this type of serger sewing machine is suitable for both beginning sewers as professionals confirm the expectation mentioned above even more. But, as it is a relatively new invention on the market, it sure deserves some research. Because, when you are looking to invest in a machine like this, it’s understandable that you want to invest your money the right way. That’s why we have listed and reviewed for you the three best self-threading serger machines from this moment.

Below, you will find an extensive description of each self-threading serging machine. Next to that, we have put together a buying guide for you below to provide you with the needed background information about this type of sewing machine itself and the most asked questions around this new type of serger machine. Read on and discover!

Top Rated: The Best Self Threading Serger of 2021

We have reviewed the below-listed self-threading serger sewing machines on several criteria and features – such as pricing, abilities, and user-friendliness – to ensure you make the right choice in the available options to purchase right now. Ready? 

#1: Best Overall & Editor’s Choice: Juki MO-1000 Serger with Jet Air Looper Threader

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When you are on the hunt for a self-threading serger machine that has the complete package of both basic and advanced features: Juki MO-1000’s serger is your guy. Not only has this extensive serging machine an automatic threading feature with Jet Air technology (of course), but it is also equipped with an adjustable differential feed option, automatic rolled hemming feature, and a quick sewing speed, with 1500 stitches per minute.

The overlock sewing machine has a sound dampening design that minimizes vibration and operating noise when in use. What makes the Juki MO-1000 even easier to use is the color-coded threading guides. Another great plus to this machine is that the upper knife can be deactivated when you don’t wish to use it. All in all, this serging machine by Juki has many features that will ease out all your sewing projects, regardless of the fabric, and provide them with a professional finish.  


  • Jet Air Technology
  • Automatic needle threader
  • 1500 stitches per minute
  • Adjustable differential feed
  • The package includes several accessories, such as screwdrivers, spool caps, needles pack, 2/3 thread selector, and thread nets. 
  • Extended thread cutter
  • Upper looper converter 2-/3- thread conversion 
  • LED sewing light
  • Easy stitch length adjustment
  • Warranty: 2 years on machine electronics, five years machine’s head unit.


  • Easy to use for both beginners and more experienced sewers
  • Includes many other sewing options besides self-threading
  • Operates super quietly
  • It comes with an instructional DVD 


  • The automatic threader is not always 100% reliable
  • The lower cutting blade may not be strong enough

#2: Best Value for Money: Janome MyLock 634D 4 Thread Overlock Serger with Self Threading Lower Looper

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Value for money is a term we like, and also, in this range of overlock machines, we have granted it. This 4 thread overlock serger by well-known manufacturer Janome soothes out your serging experience straight away, whether you are a beginner or a seasoned sewer. The MyLock 634D is either a 2, 3, or 4 thread serger equipped with a lay-in thread technology. 

The color-coded charts are easy to follow; the machine has an adjustable presser foot and comes, moreover, with a bonus package. Also, this second option on our list is a quick machine that can speed up to 1,300 stitches per minute. The overlock machine is extremely quiet, comes pre-threaded from the factory, and comes with a handy instructional DVD. Last but not least, the machine has a built-in rolled hem that doesn’t require plate changing.

The stitching options of the MyLock 634D are somewhat limited, but that isn’t a dealbreaker at all for a steady, well-built machine like this.


  • Lay-in thread tension dial
  • Threading chart and color-coded threading guide
  • 1,300 stitches per minute
  • Adjustable differential feed
  • Snap-on presser feet
  • Tension release device
  • The bonus package includes several accessories, such as beading attachment, blind stitch foot, and 3-pack needles. 
  • Adjustable stitch length
  • Easily retractable upper knife
  • Quickly changeable to the rolled hem
  • Warranty: 25 years warranty on mechanical parts, 2 years warranty on electrical components, 1 year on labor.


  • Comes pre-threaded from the factory
  • Built-in light
  • The machine operates super quiet
  • Comfortable in use, regardless of experience level
  • The overlock machine has a convenient size, not too big, and can be used almost everywhere


  • The machine might not always be stable, which can result in difficulties while stitching.

#3: Best Choice for Entry-Level: Juki MO-50E, 3 or 4 Thread Serger with Automatic Lower Looper Threader

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Regardless of the fact that most self-threading sergers are already way more compatible with beginning sewing artists with a smaller bank account than the classic, manually threaded serger, this Juki MO-50E model wins the prize either way. On both aforementioned levels, Juki’s serger is a great contestant. Similar to numbers one and two on the list, this device is equipped with a built-in rolled hem and a retractable upper knife.

With three or four threads compatibility and features such as the color-coded thread guides and lay-in tension, threading this machine is incredibly easy. The machine allows you to switch quickly and comfortably between overlock and rolled hem without having to stop the machine. A great option to start with! 


  • Lay-in thread technology
  • Color-coded thread guides
  • 1,300 stitches per minute
  • Easy stitch length adjustment
  • Adjustable differential feed
  • Adjustable calibrated knife
  • Quickly changeable from overlock to rolled hem
  • Comes with an instructional DVD + Juki Book
  • Compact size 
  • Operates quietly
  • Built-in light
  • Warranty: 2 years on machine electronics, five years machine’s head unit.


  • The more affordable option in the reviewed sergers, but also in general
  • It has many noteworthy features, such as the rapid change in between overlock and rolled hem
  • Easy, entry-level serging machine
  • Super-versatile in applications


  • The threads might snap and can get stuck under the presser foot

The machine might miss some stitches

Our Verdict: What is the best self-threading serger?

The self-threading serger that has the best qualities of this moment is, according to us, without a doubt, the Juki MO-1000 serger. In general, the brand is very reliable and manufactures high-quality sewing machines. When purchasing this machine, many other features will contribute to your sewing process. 

Not only is the serger equipped with the newest Jet Air technology to thread the needle, but it also includes many built-in features for finishing your projects with rolled hemming and a flatlock stitch. Although the price differs slightly from the other options on the list, all these extra options on the machine and the reliable, trusted quality of Juki as a brand make this option an accurate value for money that will last a lifetime.

The Buyer’s Guide

Are you looking for a bit more information before you choose the self-threading serger that meets your needs? In our detailed buyers’ guide, we have collected all the things to consider before you buy, and many other facts and tips that will be of good help when you are looking for a machine like this.

Is there a self-threading serger?

Yes, and that means no more hassle of threading your serger manually! Many manufacturers choose to provide their newest serger with a technology called ‘Jet Air.’ With that being said, there are also variants on the market that are equipped with an automatic lower looper threader. It does make the process of threading a lot easier, but it isn’t as complete as the Jet Air technology, where, with one push on the button, your serger is threaded.

Types of self-threading serger machines

Below, we will briefly explain the difference between the two types of self-threading sergers on the market.

Jet Air ThreadinTechnology Sergers

Self-threading sergers that feature the Jet Air technology are completely automatic self-threaded. With the use of air, the threads are flowing through the tubes, to which the threading ports are connected. The air does the trick, in this case, and threads both upper loopers as lower loopers. This model is often a bit more on price, but it is as complete as it could be. As this type of machine simplifies the process a lot, it is a super easy machine to use for beginners as well.

Lay-In Threading Technology Sergers

In contrast to the serging machines that are supplied with the Jet Air technology and thread both loopers in the machine, the Lay-In technology only threads the lower looper. Compared to ‘regular’ sergers, this is already an improvement and is likely to make the threading process a lot easier. What assists you in that is the color-coded route on the machine that indicates which way the thread should be placed. Serger machines that include this technology are often more budget-friendly as they have fewer options.

Brands that manufacture self-threading sergers

As you could see on our reviews list, brands in the sewing industry that manufacture self-threading sergers are Juki and Janome. However, there are a handful of other brands that added this type of machine into their collection, as follows:

  • Brother 
  • Elna
  • Baby Lock

You will discover a difference in price, abilities, and features amongst all of these big names. However, the most popular brands of this moment are Juki and Janome.

What kind of thread do I use for my serger?

Because a serger sewing machine is typically used to finish off the seams of your sewing project strongly, the thread used for it is different than the regular sewing thread. Compared to the regular thread, the type of thread used for a serger machine is finer. This has a number of reasons, including that finer thread is less likely to create bulky seams. The smoothness of it allows the thread through the machine and your sewing project.

What is also important in the serger thread is the amount of lint it produces, or better: what it doesn’t produce, as this can easily clog up the serger. And we all know that’s no fun! Usually, this type of thread comes in large spools or cones and has a quite long length, around 3000 yards. Using normal thread in your serger can work, but as it is not as strong (and more expensive), it is not recommended. Serger thread is made of cotton, cotton-poly, polyester, wooly nylon, or nylon. 

Top tip: for an extra professional-looking seam and finishing on your sewing projects, make sure to carefully pick the color and material of your thread to match it with the fabric color you used.

The Benefits of Using a Self-Threading Serger

Oh, there are many. To us, the three most important and outstanding benefits to investing in a machine like this are:

  • With the right thread and the new jet air technology, the amount of lint that gets built up is significantly reduced, or even impossible. This means a longer-lasting machine!
  • Super easy to use, no matter if you are a beginner or a seasoned sewer; it just makes life so much easier. Threading an overlocker has always been seen as challenging, but not anymore!
  • No more twisted, tangled, or knotted threads. 

How much does a self-threading serger machine cost?

Given the fact that this is a relatively new technology in the market of sewing and serging machines,  it has a price tag to it as well. Of course, it firstly depends on what features you are looking for. A serger that has lay-in technology and is equipped with only a lower looper threader will cost you less than a jet air technology serger. According to us, the best serger is the type with the most features so you won’t have to compromise or use more machines. The price varies from $300 to $1,500.

What is a Serger Sewing Machine Used for?

A serger is a used to seam fabric using multiple threads while overcasting simultaneously to cover rough edges. A serger also goes by ‘overlocker’ in European countries owing to its primary stitch, the overlock stitch. You can use the names interchangeably. It also depends on where the manufacturer of the machine is based. For example, Bernina, from a Swiss-based manufacturer, is commonly referred to as an overlocker even in the U.S.

Sergers are essentially sewing machines with improved functionality because they come with 3, 4, or 5 bobbins with three or four threads attached. Normal heavy duty sewing machines, on the other hand, only have one thread. You can use a serger to sew non-stretchy materials and finish raw edges using an overlock stitch to prevent fraying. Sergers are incredible machines for constructing and finishing off projects.

A serger can be also be used to piece a quilt. Indeed, using a serger for quilting is much easier and faster once you get used to the machine. You can chain-stitch or use three or four threads.3 Surprising Ways to Use your Serger

Threading on a Serger

Threading on a serger is not hard once you understand the machine. Sergers were designed to be user-friendly. For example, the Bernina overlocker’s threading path is color-coded, and you just need to follow the order from the blue looper (upper) to the red (lower) and, finally, the green and yellow thread needles. Here’s how to thread on the serger.

  1. Open your machine to access essential threading tools. You will find tweezers, threader/needle holder, lint brush, and screwdriver behind the cover door.
  2. Raise the machine’s presser foot to release tension disks on the threads so you can tie them together and sew with ease.
  3. Find the needle position window and make sure the red line is at the same position.
  4. Reach at the back of the sewing machine for the retractable thread stand and raise it, then place your thread on it and guide it to the top of the stand. You can use spool nets and stabilizers to manage thread.
  5. Place your thread into the pre-tension guide atop the sewing machine.
  6. Raise the machine’s presser foot to open the tension disc and lay the thread into it.
  7. Next, use a thread chart to place threads into their respective guides.
  8. Press down the lower looper threader lever to access a thread guide, place your thread into it, and then pull the lever back up. Thread loopers using tweezers. You can also use tweezers to get threads into guides.
  9. Next, thread your needles according to your stitch arrangement. For each needle, follow the color-marked thread path. Remove any needle that is not threaded.
  10. Set the appropriate machine tension for your stitch arrangement. Make sure to input the right needle, left needle lower looper, upper looper settings, and pressure foot tension.
  11. Next, dial in the cutting width and engage the MTC and rolled hem levers.
  12. Finally, set desirable stitch length, then take your machine for a test spin, adjust settings as needed, and then get to threading.

What Stitches can you Create on the Serger?

There are 16 different types of stitches you can create on your overlocker machine. The most popular are as follows.

The 4-thread overlock

Enclose the seam of your fabrics using an overlock stitch and use multiple threads to finish raw edges. This is the strongest stitch because it uses two needles. Use it on woven fabrics that need to be flexible and durable.

The 3-thread overlock

A great stitch for use on woven fabrics and stretchy knits without putting excess stress on the materials. It requires only one needle and is useful for making a blind hem.

The 2-thread rolled edge.

Some serger machines create 2-thread stitches, such as the 2-thread rolled edge for narrow edges on sheer cloth. It is commonly used as a decoration on napkins and tablecloths.

 2 thread flatlock

The 2-thread flatlock is a popular stitch on stretchy clothing. It’s recognized by its loops and ladders. This thin and flat stitch is used in athletic wear and yoga pants because it doesn’t’ add significant weight to clothing.

Rolled hem

The rolled hem is another common hem on lightweight fabric. It is created by rolling the edge of the cloth down and enclosing it with thread. It gives garments an expensive look without weighing them down.

Advantages of Sergers

Sergers present unique features and different capabilities compared to normal sewing machines. You can sew with multiple threads to create a stronger seam.

Sergers also make it easy to finish edges and embellish garments. There’s a suitable stitch for every fabric material, strength, and stretch. Another advantage is speed. Sergers can make more than 1500 stitches in a minute, enabling you to speed up through projects and save time. And what’s more, the flow of threads is automatically controlled; you won’t have to control it manually like in the normal sewing machine.

Overlockers are also known for their feed dog system for feeding fabric through the sewing machine in-between stitches resulting in high-quality and smooth stitches.

The Takeaway

Self-threading sergers are an invention that we can imagine every sewer to be happy with. With this new technology, anyone that has been dealing with the ongoing struggle of threading their overlock machine manually can entirely and easily skip this step by investing in a long-lasting, strong, and reliable self-threading serger. 

As we discussed above, there are so many reasons to decide to invest in a machine like this, including the fact that this new top of the market machine includes so many other options besides a self-threading feature. They are 100% likely to save you up a lot of time and expand your sewing qualities!

Although it takes some time to find the machine that is right for you, hopefully, our reviews list has helped you already with a step in the right direction. Are self-threading sergers new to you, or are you working with a self-threading serger machine already?