4-needle, Feed-off-the-arm, Flatseamers, Top and Bottom Coverstitch Machine

4-needle Flatseamer to prove JUKI’s original safety and ingenuity.
Create beautiful seams on underwear, fleece wear, swimsuits, even on new materials.
The sewing machine is provided with various functions for easier use and an increased sense of safety to achieve beautifully finished seams with consistency.
The sewing machine prevents oil leakage. As a result, stain removal work is no longer required to allow the sewing machine to maintain increased productivity.

Product overview

Product features

  • A direct-drive type model has been added

    A servomotor is installed on the machine head for adopting the direct-drive mechanism. The power consumption has been reduced by approximately 52 % as compared with the conventional model. Since the sewing machine provides
    superb responsiveness, the material can be controlled as desired when sewing a curve part. In addition, the belt-drive type sewing machine (when a servomotor is used) has also had its power consumption reduced by 32 %.

  • Oil leakage is prevented

    Frame: The frame is shielded and equipped with mechanisms for micro-quantity lubrication and JUKI’s unique forced oil circulation. The thread take-up mechanism arranged on the outside of the arm prevents the entry of oil splashes and dust.
    Looper section: The MF-3620 is also configured with JUKI’s unique oil-thrower mechanism to protect the looper section from oil infiltration. Excess oil is speedily reclaimed via the new oil groove.

Basic performance

  • The sewing machine is provided as standard with a micro-lifter

    Elastic materials or delicate materials can be sewn with the presser foot slightly raised from the start to the end of sewing, thereby reducing material slippage and damage.

  • The overlapped amount of the materials is adjustable by means of a presser foot shoes
    (L200 type)

    For the both-side trimming type machine (L200), the finished overlapped amount of the materials may not be sufficient depending on the characteristics of the material. In such a case, the overlapped amount of the materials can be adjusted by means of the presser foot shoes supplied with the unit.

  • Designed for upgraded safety and security

    A safety cover has been provided to prevent injury by the bobbin thread cam section.

  • Damage by the feed dog is reduced

    The presser foot of the flat seamer is a special one in which a cloth cutting mechanism is installed. This special presser foot has been originally designed by JUKI. The presser foot ensures a smoother feed of the material and helps reduce
    the load applied to the material. (In addition, the service life of the cloth cutting knife is lengthened.)


Model name MF-3620-B (direct-drive type) MF-3620 (belt-drive type)
Application Light- to heavy weight (knit )
Stitch type (USA) 4-needle, flatseamers, top and bottom coverstitch (607)
Max. sewing speed 4,200sti/min*
Stitch length 1.6~2.5mm (standard 2.1mm)
Needle gauge 5.2mm, 6.0mm
Needle bar stroke 30mm
Needle FL × 118GCS (#10S) #9S~#12S
Retainer needle FLG-8 #8
Lift of the presser foot 6.5mm
Differential feed ratio 1:0.7~1:1.5
Differential feed adjustment By lever
Lubrication Automatic (frame: minute-quantity lubrication)
Lubricating oil JUKI New Defrix Oil No.2 (equvalent to ISO VG32)
Power requirement/Power consumption 3-phase 200V / 300VA -
Weight of the machine head 25Kg 22.5Kg

*"sti/min" stands for "Stitches per Minute."

When you place orders

Subclass machine list