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JUKI MO-623 Overlock Serger Machine

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Detailed Description

JUKI MO-623 Overlock Serger Machine

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Machine Manual

This 1-needle, 2/3 thread overlock machine featuring built-in rolled hemming handles the latest materials and threads to assist you in sewing the most fashionable apparel and accessories, crafts, and home decorating items. Enjoy its color-coded threading, multi-purpose foot, and more as you sew on a MO-623. Perfect for clothing construction, its features allow you to create projects that are more versatile with ease and a clean finish. Quick and clean, this machine is ready for any project you throw at it.

Main Features

Color-Coded Threading Guides
Threading the MO-623 is a breeze. With color-coded and clearly marked thread paths.

Easy Tension Adjustment
1-Rotation Thread Tension Dials with normal tensions highlighted for simple, consistent tension adjustment. Specially designed guides keep thread in place and ensure proper sewing tension at any speed.

Multi-Function Presser Foot
The multipurpose presser foot, standard on the MO-623, allows you to create overlock stitches and add tape, elastic, ribbon, or sequins to your creations. Snap-on presser feet mean that you can easily change from the multi-purpose foot to one of the Juki Specialty feet and expand the creative potential of the MO-623.

Heavy Duty Knife System
The knife system on the MO-623 operates with a dedicated drive to assure consistent and easy cutting for both light and heavy weight fabrics.

Surging Precision
The built-in seam guide takes the guesswork out of seam allowances. Just use the conveniently located gauge on the guard cover and serge away, creating accurate seam allowances as you go.

Bright Lights Better View
Lighting on the MO-623 provides optimum lighting to the fabric and needle areas.

Easy Cutting Width Adjustment
The lower knife cutting width easily and quickly adjusts with the turn of the dial allowing you to create perfect seams and rolled edges.

Differential Feed Adjustment
Keep things moving along evenly, or create fashion techniques, like lettuce edges, with the easy-to-use differential feed dial located on the exterior right-hand side.

Easy Stitch Length Adjustments
Change the stitch length for specialty thread or overlock techniques using the conveniently located dial.

Flip and Roll
Automatic rolled hemming can be created quickly and easily with a flip of a switch. No need to change the needle plate or foot - Just flip and roll!

Basic Features

  • Sewing Speed: Max. 1,500 spm
  • Number of Threads: 2/3
  • Needles: Household(HAx1) #11-14
  • Max. Stitch Length: 0.2" (4mm)
  • Presser Foot Lift: 0.2" (5mm)
  • Differential Feed: 0.7 - 2.0 Ratio
  • Max Overlock Width: 0.2" (4mm)
  • Tension: Industrial Type Dial / 1 Rotation


  • Needle pack
  • Presser foot
  • Spool caps
  • Looper threader
  • Brush & needle inserter
  • Thread nets
  • Accessory pouch
  • Foot control & power cord
  • Tweezers
  • Screwdriver
  • Light bulb
  • Oiler
  • Vinyl cover
  • Instruction manual


  • 10.6”(W) x 13.5”(H) x 11.5”(D)
  • Machine Weight: 15lbs

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