MO-6900R Series｜Overlock / Safety Stitch Machine| JUKI Industrial Sewing Machine

High-speed, Variable Top-feed, Overlock / Safety Stitch Machine

A smooth feed mechanism free from damage on the material.
The MO-6900R Series comes with a newly-developed feed mechanism that moves the top and bottom feeds separately.
With the combination of the feed's increased differential feed ratio and improved feeding capacity, the machine is able not only to prevent uneven material feed, but also to easily finish difficult processes, such as sewing different types of materials together, ruffling and piping.

Product featuresSpecificationGauge

Product features

Excellent bottom and variable top feed mechanisms
- The locus of the top feed dog increases the surfaces of the top feed dog that horizontally synchronize with the bottom feed dog, to reliably feed the materials without damaging them.
  The feed mechanism smoothly feeds light-weight materials softly or feeds heavy-weight materials with an increased cloth-biting force.
- The fulcrum of the top feed locus can be set at the best-suited position according to the material or process.
The machine has been developed with the intention of providing an extended service life
- The bottom and top feeds are equipped with separate differential feed micro-adjusting mechanisms. Various adjusting mechanisms to adjust the feed to ideally match the material being sewn are equipped as standard, such as the bottom feed dog inclination-adjusting mechanism and the external differential feed-increasing mechanism.
- Comfortable operation is all but guaranteed, by a wider area around the needle entry, the adoption as standard of a micro-lifter feature that offers improved responsiveness to materials and provides the operator with upgraded operability, and by the reduction of operating noise and vibration, which has been achieved by designing an optimally balanced machine.
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.
Additionally, the machine incorporates an improved upper looper unit as well as coming standard with a cartridge type oil filter and cooling fan, thereby ensuring enhanced reliability.
The needle thread heat remover and needle cooler are equipped as standard

To offer improved sewing capabilities as well as to prevent stitching misshapes, the machine is equipped as standard with the needle thread heat remover and needle cooler.
Devices intended for conventional JUKI machines are also interchangeable

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.

Specification

Model name	MO-6904R	MO-6914R	MO-6916R
Stitch type	1-needle overlock	2-needle overlock	Safety stitching
Stitch style in the U.S.A.	504	514	516
Max. sewing speed	7,000sti/min* (longitudinal stroke of top feed dog is 6mm or less) 6,000sti/min* (longitudinal stroke of top feed dog is 6~8.5mm)
Stitch length	0.8~4mm		1.5~4mm
Needle gauge (mm)	-	2.0	3.2, 4.8, 4.8+2.0, 3.2+2.0
Overedging width (mm)	3.2, 4.0, 4.8, 6.4	3.2, 4.0	3.2, 4.0, 4.8, 6.4
Bottom differential feed ratio	For gathering 1:2 (max. 1:4), For stretching 1:0.7 (max. 1:0.6)
Needle bar stroke	24.5mm
Inclination angle of the needle	20°
Needle mechanism	Needle bar method and upper /lower bushing
Needle	DC×27 (excluding some subclass model)
Vertical stroke of top feed dog	3.5~8.5mm (it differs with the machine's specifications.)
Longitudinal stroke of top feed dog	1~7.5mm (it differs with the machine's specifications.)
Max. lift of the presser foot	7mm (excluding some subclass model)
Max. presser foot pressure	63.7N (6.5kgf)
Stitch adjusting method	By push-button
Bottom differential feed adjusting method	By lever (with micro-adjustment)
Top differential feed adjusting method	By lever (with micro-adjustment)
Weight of the machine head	29kg
Lubrication	Automatic
Lubricating oil	JUKI Machine Oil 18 (equivalent to ISO VG18)
Needle cooler	Provided as standard
Needle thread heat remover	Provided as standard
Micro-lifter	Provided as standard

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

When you place orders

Subclass machine list

Gauge

MO-6904R-0D4-3F6

Guage	THROAT PLATE	MAIN FEED DOG	AUXILIARY FEED DOG	DIFFERENTIAL FEED DOG	UPPER FEED DOG	PRESSER FOOT ASM.	PRESSER FOOT HINGE	PRESSER FOOT	NEEDLE CLAMP
Figure
Needle width * Overedging width	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N
3.2	R4200J6DD0C	11597101	13191309	11886207	13277900	13278759	13278908	13278700	40010885

Guage	UPPER LOOPER	LOWER LOOPER	CHIP GUARD COVER	UPPER KNIFE	LOWER KNIFE	NEEDLE HOLDER	TRAVELING NEEDLE GUARD	GUIDE SUPPORT GAUGE
Figure
Needle width * Overedging width	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N
3.2	11888104	11999307	13104104	11845807	13150701	11890100	11890001	13131909

Guage	UPPER LOOPER ARM	UPPER LOOPER GUIDE
Figure
Needle width * Overedging width	P/N	P/N
3.2	13131057	40015637

MO-6904R-0E4-300

Guage	THROAT PLATE	MAIN FEED DOG	AUXILIARY FEED DOG	DIFFERENTIAL FEED DOG	UPPER FEED DOG	PRESSER FOOT ASM.	PRESSER FOOT HINGE	PRESSER FOOT	NEEDLE CLAMP
Figure
Needle width * Overedging width	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N
4.0	R4200J6ED00	13191606	13191309	13192802	13277900	13278759	13278908	13278700	40010885

Guage	UPPER LOOPER	LOWER LOOPER	CHIP GUARD COVER	UPPER KNIFE	LOWER KNIFE	NEEDLE HOLDER	TRAVELING NEEDLE GUARD	GUIDE SUPPORT GAUGE
Figure
Needle width * Overedging width	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N
4.0	11888104	11999307	13104104	11845807	13150701	11890100	11890001	13131909

Guage	UPPER LOOPER ARM	UPPER LOOPER GUIDE
Figure
Needle width * Overedging width	P/N	P/N
4.0	13131057	40015637

MO-6904R-0F6-500

Guage	THROAT PLATE	MAIN FEED DOG	AUXILIARY FEED DOG	DIFFERENTIAL FEED DOG	UPPER FEED DOG	PRESSER FOOT ASM.	PRESSER FOOT HINGE	PRESSER FOOT	NEEDLE CLAMP
Figure
Needle width * Overedging width	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N
4.8	R4300J6FE0B	11883303	13191309	11885605	11936804	11932258	11925104	11926102	40010885

Guage	UPPER LOOPER	LOWER LOOPER	CHIP GUARD COVER	UPPER KNIFE	LOWER KNIFE	NEEDLE HOLDER	TRAVELING NEEDLE GUARD	GUIDE SUPPORT GAUGE
Figure
Needle width * Overedging width	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N
4.8	11888104	11999307	13104104	11845807	13150701	11890100	11890001	13132006

Guage	UPPER LOOPER ARM	UPPER LOOPER GUIDE
Figure
Needle width * Overedging width	P/N	P/N
4.8	12122362	40015637

MO-6904R-0H4-50M

Guage	THROAT PLATE	MAIN FEED DOG	AUXILIARY FEED DOG	DIFFERENTIAL FEED DOG	UPPER FEED DOG	PRESSER FOOT ASM.	PRESSER FOOT HINGE	PRESSER FOOT	NEEDLE CLAMP
Figure
Needle width * Overedging width	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N
6.4	R4200J6HG00	11947009	13191309	11947108	11947207	11946860	11946902	11946803	12303905

Guage	UPPER LOOPER	LOWER LOOPER	CHIP GUARD COVER	UPPER KNIFE	LOWER KNIFE	NEEDLE HOLDER	TRAVELING NEEDLE GUARD	GUIDE SUPPORT GAUGE
Figure
Needle width * Overedging width	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N
6.4	11888104	11999307	13104104	11845807	13150701	11890100	11890001	13132006

Guage	UPPER LOOPER ARM	UPPER LOOPER GUIDE
Figure
Needle width * Overedging width	P/N	P/N
6.4	13131057	40015637

MO-6914R-BD4-307

Guage	THROAT PLATE	MAIN FEED DOG	AUXILIARY FEED DOG	DIFFERENTIAL FEED DOG	UPPER FEED DOG	PRESSER FOOT ASM.	PRESSER FOOT HINGE	PRESSER FOOT	NEEDLE CLAMP
Figure
Needle width * Overedging width	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N
2*3.2	R4205J6DE00	11597101	13191309	B1657814B0E	11936705	11932357	11925104	11926201	13175203

Guage	UPPER LOOPER	LOWER LOOPER	CHIP GUARD COVER	UPPER KNIFE	LOWER KNIFE	NEEDLE HOLDER	TRAVELING NEEDLE GUARD	GUIDE SUPPORT GAUGE
Figure
Needle width * Overedging width	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N
2*3.2	12176004	11999307	13104104	11845807	13150701	11890308	11890001	13131909

Guage	UPPER LOOPER ARM	UPPER LOOPER GUIDE
Figure
Needle width * Overedging width	P/N	P/N
2*3.2	13131156	40016841

MO-6914R-BD6-307

Guage	THROAT PLATE	MAIN FEED DOG	AUXILIARY FEED DOG	DIFFERENTIAL FEED DOG	UPPER FEED DOG	PRESSER FOOT ASM.	PRESSER FOOT HINGE	PRESSER FOOT	NEEDLE CLAMP
Figure
Needle width * Overedging width	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N
2*3.2	R4305J6DE00	13192000	13191309	13193206	13278007	13278858	13278908	13278809	13175203

Guage	UPPER LOOPER	LOWER LOOPER	CHIP GUARD COVER	UPPER KNIFE	LOWER KNIFE	NEEDLE HOLDER	TRAVELING NEEDLE GUARD	GUIDE SUPPORT GAUGE
Figure
Needle width * Overedging width	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N
2*3.2	12176004	11999307	13104104	11845807	13150701	11890308	1189000	13131909

Guage	UPPER LOOPER ARM	UPPER LOOPER GUIDE
Figure
Needle width * Overedging width	P/N	P/N
2*3.2	13131156	40016841

MO-6914R-BE6-307

Guage	THROAT PLATE	MAIN FEED DOG	AUXILIARY FEED DOG	DIFFERENTIAL FEED DOG	UPPER FEED DOG	PRESSER FOOT ASM.	PRESSER FOOT HINGE	PRESSER FOOT	NEEDLE CLAMP
Figure
Needle width * Overedging width	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N
2*4	R4305J6EE00	13192000	13191309	13193206	13278007	13278858	13278908	13278809	13175203

Guage	UPPER LOOPER	LOWER LOOPER	CHIP GUARD COVER	UPPER KNIFE	LOWER KNIFE	NEEDLE HOLDER	TRAVELING NEEDLE GUARD	GUIDE SUPPORT GAUGE
Figure
Needle width * Overedging width	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N
2*4	12176004	11999307	13104104	11845807	13150701	11890308	11890001	13131909

Guage	UPPER LOOPER ARM	UPPER LOOPER GUIDE
Figure
Needle width * Overedging width	P/N	P/N
2*4	13131156	40016841

MO-6914R-BD6-40H

Guage	THROAT PLATE	MAIN FEED DOG	AUXILIARY FEED DOG	DIFFERENTIAL FEED DOG	UPPER FEED DOG	PRESSER FOOT ASM.	PRESSER FOOT HINGE	PRESSER FOOT	NEEDLE CLAMP
Figure
Needle width * Overedging width	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N
2*3.2	R4305J6DE00	13192000	13191309	13193206	13278007	13278858	13278908	13278809	13175203

Guage	UPPER LOOPER	LOWER LOOPER	CHIP GUARD COVER	UPPER KNIFE	LOWER KNIFE	NEEDLE HOLDER	TRAVELING NEEDLE GUARD	GUIDE SUPPORT GAUGE
Figure
Needle width * Overedging width	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N
2*3.2	12176103	11999307	13104104	11845807	13150701	11890308	11890001	13132006

Guage	UPPER LOOPER ARM	UPPER LOOPER GUIDE
Figure
Needle width * Overedging width	P/N	P/N
2*3.2	13131156	40051913

MO-6914R-BE6-40H

Guage	THROAT PLATE	MAIN FEED DOG	AUXILIARY FEED DOG	DIFFERENTIAL FEED DOG	UPPER FEED DOG	PRESSER FOOT ASM.	PRESSER FOOT HINGE	PRESSER FOOT	NEEDLE CLAMP
Figure
Needle width * Overedging width	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N
2*4	R4305J6EE00	13192000	13191309	13193206	13278007	13278858	13278908	13278809	13175203

Guage	UPPER LOOPER	LOWER LOOPER	CHIP GUARD COVER	UPPER KNIFE	LOWER KNIFE	NEEDLE HOLDER	TRAVELING NEEDLE GUARD	GUIDE SUPPORT GAUGE
Figure
Needle width * Overedging width	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N
2*4	12176103	11999307	13104104	11845807	13150701	11890308	1189000	13132006

Guage	UPPER LOOPER ARM	UPPER LOOPER GUIDE
Figure
Needle width * Overedging width	P/N	P/N
2*4	13131156	40051913

MO-6916R-DD6-300

Guage	THROAT PLATE	MAIN FEED DOG	AUXILIARY FEED DOG	DIFFERENTIAL FEED DOG	UPPER FEED DOG	HINGING PRESSER ASM.	PRESSER FOOT HINGE	FRONT PRESSER	REAR PRESSER
Figure
Needle width * Overedging width	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N
3.2*3.2	R4608J6DD00	11882909	13191408	12173209	12330007	12320057	12320206	12320008	12320107

Guage	CHAIN LOOPER NEEDLE CLAMP	UPPER LOOPER	LOWER LOOPER	CHAIN LOOPER	CHIP GUARD COVER	UPPER KNIFE	LOWER KNIFE	NEEDLE HOLDER	NEEDLE HOLDER	NEEDLE HOLDER
Figure
Needle width * Overedging width	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N
3.2*3.2	12257002	11888104	11999307	12120705	13104203	11845807	13150701	12015301	12015400	12177903

Guage	TRAVELING NEEDLE GUARD	GUIDE SUPPORT GAUGE	UPPER LOOPER ARM	UPPER LOOPER GUIDE
Figure
Needle width * Overedging width	P/N	P/N	P/N	P/N
3.2*3.2	11890001	13132006	13131057	40015637

MO-6916R-DE4-300

Guage	THROAT PLATE	MAIN FEED DOG	AUXILIARY FEED DOG	DIFFERENTIAL FEED DOG	UPPER FEED DOG	HINGING PRESSER ASM.	PRESSER FOOT HINGE	FRONT PRESSER	REAR PRESSER
Figure
Needle width * Overedging width	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N
3.2*4	R4508J6ED00	13192406	13191408	13193602	12330007	12320057	12320206	12320008	12320107

Guage	CHAIN LOOPER NEEDLE CLAMP	UPPER LOOPER	LOWER LOOPER	CHAIN LOOPER	CHIP GUARD COVER	UPPER KNIFE	LOWER KNIFE	NEEDLE HOLDER	NEEDLE HOLDER	NEEDLE HOLDER
Figure
Needle width * Overedging width	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N
3.2*4	12257002	11888104	11999307	12120705	13104203	11845906	13150701	12015301	12015400	12177903

Guage	TRAVELING NEEDLE GUARD	GUIDE SUPPORT GAUGE	UPPER LOOPER ARM	UPPER LOOPER GUIDE
Figure
Needle width * Overedging width	P/N	P/N	P/N	P/N
3.2*4	11890001	13132006	13131057	40015637

MO-6916R-DE6-300

Guage	THROAT PLATE	MAIN FEED DOG	AUXILIARY FEED DOG	DIFFERENTIAL FEED DOG	UPPER FEED DOG	HINGING PRESSER ASM.	PRESSER FOOT HINGE	FRONT PRESSER	REAR PRESSER
Figure
Needle width * Overedging width	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N
3.2*4	R4608J6ED00	11882909	13191408	12173209	12330007	12320057	12320206	12320008	12320107

Guage	CHAIN LOOPER NEEDLE CLAMP	UPPER LOOPER	LOWER LOOPER	CHAIN LOOPER	CHIP GUARD COVER	UPPER KNIFE	LOWER KNIFE	NEEDLE HOLDER	NEEDLE HOLDER	NEEDLE HOLDER
Figure
Needle width * Overedging width	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N
3.2*4	12257002	11888104	11999307	12120705	13104203	11845807	13150701	12015301	12015400	12177903

Guage	TRAVELING NEEDLE GUARD	GUIDE SUPPORT GAUGE	UPPER LOOPER ARM	UPPER LOOPER GUIDE
Figure
Needle width * Overedging width	P/N	P/N	P/N	P/N
3.2*4	11890001	13132006	13131057	40015637

MO-6916R-FF6-300

Guage	THROAT PLATE	MAIN FEED DOG	AUXILIARY FEED DOG	DIFFERENTIAL FEED DOG	UPPER FEED DOG	HINGING PRESSER ASM.	PRESSER FOOT HINGE	FRONT PRESSER	REAR PRESSER
Figure
Needle width * Overedging width	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N
4.8*4.8	R4612J6FD00	11884004	13191408	12173308	12330114	12320552	12320701	12320503	12320602

Guage	CHAIN LOOPER NEEDLE CLAMP	UPPER LOOPER	LOWER LOOPER	CHAIN LOOPER	CHIP GUARD COVER	UPPER KNIFE	LOWER KNIFE	NEEDLE HOLDER	NEEDLE HOLDER	NEEDLE HOLDER
Figure
Needle width * Overedging width	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N
4.8*4.8	12150306	11888104	11999307	12120705	13104203	11845807	13150701	12015301	12015400	12177903

Guage	TRAVELING NEEDLE GUARD	GUIDE SUPPORT GAUGE	UPPER LOOPER ARM	UPPER LOOPER GUIDE
Figure
Needle width * Overedging width	P/N	P/N	P/N	P/N
4.8*4.8	11890001	13132006	13131057	40015637

MO-6916R-FF6-50H

Guage	THROAT PLATE	MAIN FEED DOG	AUXILIARY FEED DOG	DIFFERENTIAL FEED DOG	UPPER FEED DOG	HINGING PRESSER ASM.	PRESSER FOOT HINGE	FRONT PRESSER	REAR PRESSER
Figure
Needle width * Overedging width	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N
4.8*4.8	R4612J6FF00	11883006	13191408	12173506	12330205	12320958	12168407	12320909	12165908

Guage	CHAIN LOOPER NEEDLE CLAMP	UPPER LOOPER	LOWER LOOPER	CHAIN LOOPER	CHIP GUARD COVER	UPPER KNIFE	LOWER KNIFE	NEEDLE HOLDER	NEEDLE HOLDER	NEEDLE HOLDER
Figure
Needle width * Overedging width	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N
4.8*4.8	12257507	11991908	11999307	12120705	13104203	11845807	13150701	12015301	12015400	12177903

Guage	TRAVELING NEEDLE GUARD	GUIDE SUPPORT GAUGE	UPPER LOOPER ARM	UPPER LOOPER GUIDE
Figure
Needle width * Overedging width	P/N	P/N	P/N	P/N
4.8*4.8	11890001	13132006	13131156	40015637

MO-6916R-FH6-60H

Guage	THROAT PLATE	MAIN FEED DOG	AUXILIARY FEED DOG	DIFFERENTIAL FEED DOG	UPPER FEED DOG	HINGING PRESSER ASM.	PRESSER FOOT HINGE	FRONT PRESSER	REAR PRESSER
Figure
Needle width * Overedging width	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N
4.8*6.4	R4612J6HK00	12171104	13191408	12174207	12330205	12320958	12168407	12320909	12165908

Guage	CHAIN LOOPER NEEDLE CLAMP	UPPER LOOPER	LOWER LOOPER	CHAIN LOOPER	CHIP GUARD COVER	UPPER KNIFE	LOWER KNIFE	NEEDLE HOLDER	NEEDLE HOLDER	NEEDLE HOLDER
Figure
Needle width * Overedging width	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N
4.8*6.4	12150702	12176202	11999802	12120705	13104203	11565900	11566502	12015301	12015400	12177903

Guage	TRAVELING NEEDLE GUARD	GUIDE SUPPORT GAUGE	UPPER LOOPER ARM	UPPER LOOPER GUIDE
Figure
Needle width * Overedging width	P/N	P/N	P/N	P/N
4.8*6.4	11890001	13132006	13131156	40051913

MO-6943R-1D6-307

Guage	THROAT PLATE	MAIN FEED DOG	AUXILIARY FEED DOG	DIFFERENTIAL FEED DOG	UPPER FEED DOG	HINGING PRESSER ASM.	PRESSER FOOT HINGE	FRONT PRESSER	REAR PRESSER
Figure
Needle width * Overedging width	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N
2*3.2	R4612J6DE01	11884004	13191408	12173308	12330114	12321451	12320701	12321402	12320602

Guage	CHAIN LOOPER NEEDLE CLAMP	UPPER LOOPER	LOWER LOOPER	CHAIN LOOPER	CHIP GUARD COVER	UPPER KNIFE	LOWER KNIFE	NEEDLE HOLDER	NEEDLE HOLDER	NEEDLE HOLDER
Figure
Needle width * Overedging width	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N	P/N
2*3.2	12275004	12176004	11999307	12120705	13104203	11845807	13150701	11999406	12015301	12177903

Guage	TRAVELING NEEDLE GUARD	GUIDE SUPPORT GAUGE	UPPER LOOPER ARM	UPPER LOOPER GUIDE
Figure
Needle width * Overedging width	P/N	P/N	P/N	P/N
2*3.2	11890001	13131909	13131156	40051917

MO-6900R Series