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Juki MO-644D Garnet Series Serger

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Juki MO-644D Garnet Series Serger

Juki is a name that is synonymous with sewing machine royalty. If you are looking for a serger or overlocker, Juki is a name you can trust. For those looking for a top quality serger, the Juki MO644D is a recognized as a reasonably-priced 2-needle 2, 3, or 4 thread serger that has outstanding stitch quality and ease of use. 

The MO644D, which is in the Garnet line of Juki sergers, can be used to make sportswear, swimwear, or even evening wear with ease. This machine is good for experienced sewers, yet simple and easy enough for beginners to work with as well. With a max speed of 1,500 spm, this machine will help you accomplish your projects fast!

This versatile MO644D can handle the latest threads and materials, giving you many creative options for your projects. With its differential feed system and a presser foot that can be adjusted, the fact that the stitch quality of this machine is far above average is something to consider.

This affordable overlocker comes with color-coded threading to help thread the serger, a one-rotation tension adjustment, an upper and lower knife for better cutting, an automatic rolled hem setting, a presser foot with multiple functions to add tape, ribbon, elastic, and even sequins, an included seam guide for easy hemming, and bright LED lights to make it easier to see your project.

There are optional presser feet you can purchase that will allow you to enhance your sewing experience. You can get blind stitch, elasticator, cording, beading, gathering, piping, curved pearl, and universal blind stitch presser feet.

Juki sergers come with a 2 year warranty for electronics, a 5 year warranty for the mechanical parts, and a 90 day labor warranty.

The Juki MO 644D - Exceptional Stitch Quality!



  • Sewing Speed: Max 1,500 spm
  • Number of Threads: 2/3/4 Threads
  • Needle: Household Machine Size 11 or 14
  • Overlocking Width: Left Needle: 8mm / Right Needle: 4mm
  • Rolled Hem: 2mm
  • Stitch Length: 1 - 4mm (Standard: 2.5mm) / Rolled Hem: 1.0 - 1.5mm
  • Differential Feed: 0.07 : 2.0 Ratio
  • Tension: Industrial Type Dial / 1 Rotation
  • Built-In Rolled Hemming: Right (Narrow) or Left (Wide) Needle / 2 or 3 Thread
  • Flat Lock: Right or Left Needle, 2 or 3 Thread
  • Universal Presser Foot: Tape, Ribbon, Narrow Elastic Application
  • Presser Foot Lift: 5mm
  • Dimensions: 270mm (W) × 340mm (D) × 295mm (H)
  • Weight: 7.0 kg (15 lbs.)

Included Accessories

  • Foot Control
  • Nets
  • Spool Caps
  • Tweezers
  • Cleaning Brush
  • Looper Threader
  • Needle Set
  • Small Screwdriver
  • Oiler
  • Accessory Bag
  • Dust Cover
  • Foot Control/Power Cord
  • Instruction Manual


Workbook and DVD Combo

This Workbook and Instructional DVD combo is the complete package for users of Juki Lock 600 series Sergers. It contains useful tips, hints, and explinations to make even complicated serger ideas and projects a breeze.


  • Color Coded Threading Guides throughout the machine make threading easy and efficient
  • Adjustable Stitch Length by simply turning the knob inside the machine within the range of 1 -4mm
  • Adjustable Differential Feed is controlled and adjusted by a dial conveniently located on the outside, left-hand side of the machine
  • 1-Rotation Thread Tension Dials with normal tensions highlighted for simple, consistent tension adjustment
  • Easy Dial Knife Adjustment makes the upper knife completely self-adjusting
  • Heavy Duty Knife System operates with dedicated drive to assure consistent and easy cutting of light to heavy weight fabrics
  • Automatic Rolled Hemming can be created wit built-in finger tip control; there is no need to change the foot or plate
  • Sewing Light is placed to give optimum lighting to the fabric and needle areas
  • Multi-Purpose Foot is equipped with a slotted tape guide for sewing woven tape, elastic, sequins and ribbon
  • 2/3 Thread Converter is easy to install and allows 1 needle thread and one lower looper thread for securing overedging
  • Sewing Width Gauge takes the guesswork out of seam allowances and is conveniently located on the guard cover

Optional Deluxe 8 Pack of Accessories

  • Blind Stitch Foot
  • Elasticator Foot
  • Cording Foot
  • Beading Foot
  • Gathering Foot
  • Piping Foot
  • Universal/Blind Stitch Foot

Juki Manufacturers Warranty:
Juki Sergers have a 2 year electronic warranty on motors , light assembly, wiring, switches, circuit boards and speed control. A 5 year mechanical warranty is for "all other parts" however this excludes "consumable parts" such as loopers, feed dogs, knife blades, bulbs, lamps, presser feet, needles and belts. Juki sergers also comes with 90 days labor period on adjustments good through the Juki dealer the machine is originally purchased from. This warranty is valid only on products used for household purposes. Using this product in a commercial environment voids warranty.

148 Reviews

  • 3
    MO 644D

    Posted by Ray Scotty Zwicker on 24th Jun 2022

    Got it on time and still struggling with the tight thread.

  • 5
    Love my Juki MO-644D Serger!

    Posted by Kira on 23rd Jun 2020

    Easy set up & surprisingly heavy-duty for a home machine! I've already made a couple multiple-layered thick sweatpants & sweatshirts and had no problems. A steal for the price!

  • 5
    Great serger

    Posted by The L. on 25th Jan 2019

    Love it, so quiet.

  • 5
    Fantastic Starter Serger

    Posted by Customer on 25th Jan 2019

    It was my first serger and I agonized between this one and the Brother 1034d because cost was a big factor. Ultimately I chose the Juki after reading many reviews and trying it in a sewing shop. Since then, it seems every time I walk past a dry cleaners I see this Juki serger. I'm nosy and always look. It must be a sign of a good machine! I love this machine. It is simple, reliable and user friendly. I struggled at first but I practiced threading it over and over until I didn't feel intimidated anymore. That is key. Read the instructions, find videos and watch them. Now I find it easy to do. I mainly wanted a serger for sewing my daughter leotards and I can't believe how much more professional the finish is and it is actually easier than trying to use a sewing machine for seams. The fabric goes through it easily and sews beautifully. It is a quality basic serger and I think it's a great buy for beginners. Tip - at the sewing shop the man helping me said you never need to change the thread tension. Leave them on 4 (but move them all to 0 when threading machine then put them back up to 4 before sewing). So far that has worked for me. I may adjust the other options but not the thread tension.

  • 5

    Posted by Idan peretz on 25th Jan 2019

    Love this machine I bought it for the 2nd time, the first I left overseas. I had it for 8 year and never had any problems, I replaced the light bulb once in an 8 years. Highly recommended!

  • 5
    Love my Portable JUKI MO644D Serger

    Posted by Yacousai on 15th Nov 2018

    It's the best buy I could have done, so far I've been using it and its very easy. I'm certain that all the other stitches are also easy as pie

  • 5
    Five Stars

    Posted by minou on 15th Nov 2018

    A dream come true! A gift from my son. I am so excited...

  • 5
    Works Very Well

    Posted by fayedlight on 15th Nov 2018

    I purchased this several years ago and learned to use it via the manual (I copied and laminated it and keep it by the machine) videos, a purchased book, an on-line class and am still learning little things about it. A class at a sewing store would probably be better yet--hands-on training. Sergers are different than regular sewing machines and you need Patience in working with them. Have used it periodically for cushion covers, pillows, clothing projects--just about everything. It got jammed during Christmas season last year and I messed with tensions a lot and couldn't get it to work properly so took it in for a tune up. Works great again. If you purchase, clean and oil it regularly and keep covered when not using. The tune-up ran about $160, which is standard for sergers. I've read that you should have them serviced about once a year because the technicians can clean and oil them internally and check them over. I had mine 3-4 years before taking it in and am willing to pay that every 3-4 years to keep it in good running condition as I don't intend to upgrade to anything pricier. It suits my home sewing needs perfectly.

  • 5
    Juki Serger MO-644D Awesomeness

    Posted by Barbara Joy on 26th Apr 2018

    Wonderful serger. I had been using my Brother 1034D model serger since 2003, as it was in my price range for sergers. A friend and master seamstress highly recommended the Juky 644D and when I came to SewVac Direct I saw a fabulous price! I had also purchased my wonderful Felting Machine (Janome) from SVD so I knew of their great business structure, customer service and fast shipping, so I ordered right away. My Juki arrived super quickly, and it runs like a dream (brand new). Very pleased with all it can do, I even threaded it correctly the FIRST TIME (if you have worked with sergers, you know about "threading" them, LOL!) So, I thank you Juki and Sew Vac Direct - a winning combination!