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Super-high-speed, Cylinder-bed, Overlock Machine – MO-6900C series

The MO-6900C Series sewing machine, provided with a small-in-diameter cylinder bed, is capable of runstitching or blind-hemming tubular materials, such as sleeve cuffs, with ease. The operator can carry out sewing of the tubular material while turning it downward. This promises improved workability and contributes to dramatically increased productivity. Comes with differential feed and cloth cutting knife.

The machine ensures both beautiful and upgraded seam quality at higher speeds
Since the machine comes with a needle-thread take-up mechanism as well as a looper thread take-up mechanism, to enable sewing with a lower tension applied to the material, it achieves soft-feeling high-quality seams.

Mechanisms that promise improved operability
Since the machine is provided as standard with the bottom feed dog inclinationadjusting mechanism and the external differential feed-increasing mechanism, it can be easily adjusted to ideally match the material being sewn. In addition, the machine is provided as standard with a micro lifter feature that offers improved responsiveness to materials, and provides the operator with upgraded operability. The stitch length can be easily adjusted with the push-button mounted on the front surface of the sewing machine.

The needle thread heat remover and needle cooler are equipped as standard
To offer improved sewing capabilities as well as to prevent stitching mishaps during high-speed sewing, the machine is provided as standard with the needle thread heat remover and needle cooler.

Further increased reliability
The introduction of a shield-structured needle bar mechanism and upper and lower needle bar bushings, contributes to increased durability and reliability. The machine is provided as standard with a cartridge type oil filter and cooling fan, thereby ensureing enhanced reliability.

Small-in-diameter cylinder bed
The cylinder bed is bestsuited to the runstitching and blind hemming of tubular materials. Gauges and devices you have used with your existing JUKI machines are also interchangeable with no additional machining required. This eliminates both the waste of resources and unwanted extra costs.



Model name MO-6904C MO-6914C
Stitch type 1-needle overlock 2-needle overlock
Stitch style in the U.S.A. 504 514
Max. sewing speed 8,000sti/min*
Stitch length 0.8~3.5mm
Needle gauge 2.0mm
Overedging width 3.2, 4.0, 4.8mm 3.2, 4.0mm
Differential feed ratio Forgathering 1:2.3 (max. 1:4.5), For stretching 1:0.8
Needle bar stroke 24.5mm
Inclination angle of the needle 20°
Needle mechanism Needle bar method and upper/lower bushing
Needle DC×27
Max. lift of the presser foot 7mm (excluding some subclass model)
Max. presser foot pressure 63.7N (6.5kg)
Stitch adjusting method By push-button
Differential-feed adjusting method By
Weight of the machine head 24kg
Lubrication Automatic
Lubricating oil JUKI Machine Oil 18 (equivalent to ISO VG18)
Needle cooler Provided as standard
Needle thread heat remover

*“sti/min”stands for “Stitches per Minute.”


Subclass Machine List

Model No. Materials No. of
No. of
No. of
feed dog
differential feed
Needle system Max.
1-needle overlock
MO-6904C-0D6-307 L~M 1 3 3.2mm 3 3.5mm 1:0.8~1:2.3 7mm DC×27 #11 8,000
MO-6904C-0E6-307 4.0mm
MO-6904C-0F4-307 4.8mm 2 DC×27#14
2-needle overlock
MO-6914C-BD4-307 L~M 2 4 2.0mm 3.2mm 2 3.5mm 1:0.8~1:2.3 6.5mm DC×27#11 8,000
MO-6914C-BD6-307 3
MO-6914C-BE6-307 4.0mm


Devices and Attachments

Model Part No. Description
Chain-off thread trimming device
T043 MAT-0430000A0 Pneumatic side cutter
Blower-type chain-off thread suction device
MC-7B Blower-type chain-off thread suction device + cloth chips
Pneumatic chain-off thread suction device
MC-38 Pneumatic chain-off thread + cloth chips
MC-39 Function of MC-8 + auto-lifter
*The aforementioned devices are not equipped with air regulator. Please purchase the following components when you need to regulate air pressure
PF-0552010-B0 Air regulator (F.R. unit asm.)
GMD-01080000×2 Fixing screw for F.R. unit asm.
F1021-003-000 Tube connector (male)
GAS-12063000* One-touch connector
*Selection parts instead of the tube connector
AK93 GAK-930000A0 Pneumatic type (knee-operated)
AK94 GAK-940000A0 Pneumatic type (with chain-off thread suction device)
AK102 GAK-A02000A0 Pneumatic type (for servomotor)
[Reference] Combination table of “chain-off thread suction device” and “auto-lifer” which correspond to “chain-off thread trimming device”.

Chain-off thread trimming device + Chain-off thread suction device Auto-lifter
T043 MC-7B AK102 (JUKI servomotor)
*― AK94 (any motor will do)
*AK94 is equipped with chain-off thread suction device.
MC-38 AK102 (JUKI servomotor)
MC-39 ― (MC-39 is equipped with auto-lifter.)


Model Part No. Description Feature
Blind hemming device
L124 MAL-124000A0 Blind stitch hemming attachment A ruler used for blind hemming in knits
L125 MAL-125001A0 Automatic folded-edge controlled blind hemming device For flat upper knife For 110, 115, 220, 240V The attachment automatically detects the overlapped section of a material. Then, it makes the needle enter the material deeper to prevent stitch deviation
MAL-125002A0 For 220, 380, 415, 440V
MAL-125001AA For square upper knife For 110, 115, 220, 240V
MAL-125002AA For 220, 380, 415, 440V
Cloth tensioner
TR01 Small-diameter roller for rib attaching
TR02 Large-diameter cloth tensioner
Ruler, Miscellaneous
H153 MAH-153000A0 Cloth edge guide ruler A swing type edge guide
122-26155 Cloth plate Wider material can be sewn by attaching the cloth plate.


When you place orders
Please note when placing orders, that the model name should be written as follows:

MO6900C place orders