MyLock 644D

The MyLock 644D includes essential features for simple serging. The differential feed system of two feed dogs virtually eliminates puckered edges on woven fabrics and stretched edges on knits. Its unique rolled hem conversion feature eliminates the need to change the needle plate, foot, or tension setting for rolled hemming. Janome has restructured the lower looper guides for easy access. Colour-coded guides are easy to follow for 2, 3, or 4 thread serging. All of the features on this machine are specially designed to make this serger the easiest to use on the market today.

ML644D Brochure



ML644D_1Differential Feed:

 The MyLock 644D is equipped with a unique differential feed device designed to prevent fabrics from puckering or stretching.





ML644D_2Lower Looper Pre-Tension Slider

Easy to adjust the looper thread tension for rolled hemming.





ML644D_3Changeable Thread Guide

You can change the thread tension setting depending on whether you’re doing 3, 4, or 2 thread serging.





ML644D_4Easy Lower Looper Threading

By rotating the thread guide, the lower looper thread guides will become accessible to make threading easier. The lower looper thread guide will return to its original position automatically by turning the handwheel.




ML644D_5Easy Upper Knife Release

Upper knife can be quickly and easily deactivated by the slide of a knob.


Thread Overlock

2, 3, or 4 thread overlock

Lay-in Tension Dial


Seam Width

1 – 5mm seam length3.3mm (narrow)

Rolled Hem

7.5mm (wide) 2.0mm

Slim Foot


Needle Threader

Handy needle threader

Thread Cutter

Convenient thread cutter

Easy Rolled Hem Changeover


Feed Ratio

0.5 – 2.2 differential feed ratio

Upper Knife

Easy upper knife release

Cutting Width

Adjustable cutting width: 3.1 – 5.1mm

Easy Lower Looper Threading


Differential Feed


Lower Looper Pre-Tension Setting Slider


Thread Guides

Changeable , colour-coded

Needle Guard

Front and back needle guard

Tension Dials


Snap-on Presser Feet


Code No. Name Description
741814003 Oil
790005005 Spare Upper knife
791006227 Waste chip box
787805003 Accessory box
791829006 Instruction Book
791831001 Instructional DVD
C-2030 Foot Control
784810002 Screwdriver (large)
647803004 Screwdriver (small)
624801001 Tweezers
624806006 Nets x 4
822020503 Spool Cap

Fatal error: Call to a member function get_sku() on a non-object in /home/jatemp2janomeaus/public_html/wp-content/plugins/janome-machine-accessories/janome-machine-accessories.php on line 136