JUKI MO-6900R Series User manual

MO-6914R
■AC SERVOMOTOR/Machine head
MO69 R /AK101/SY35
■WHEN YOU PLACE ORDERS
Please note when placing orders, that the model name should be written as follows:
＊Only the pneumatic auto-lifter is prepared for the
MO-6900R series.
＊Select a sewing speed that
is lower than the machine
head's maximum sewing
speed by 500sti/min.
MO69 R
Stitch type U.S.A Code
1-needle overlock 504 04
2-needle overlock 514 14
2-needle safety stitch 516 16
3-needle safety stitch 43
Type Code
Variable top-feed R
Needle Overedging
gauge (mm) width (mm) Feed dog Code
― 3.2 2-row 0D4
― 4.0 2-row 0E4
― 4.8 3-row 0F6
― 6.4 2-row 0H4
2.0 3.2 2-row BD4
2.0 3.2 3-row BD6
2.0 4.0 3-row BE6
3.2 3.2 3-row DD6
3.2 4.0 2-row DE4
3.2 4.0 3-row DE6
4.8 4.8 3-row FF6
4.8 6.4 3-row FH6
4.8+2.0 3.2 3-row 1D6
3.2+2.0 3.2 3-row 2D6
●To order, please contact your nearest JUKI distributor.
Material Application Special machine Code
classification
Runstitching Standard 300
For general fabrics Runstitching Upper looper high throw 307
Soft-chain Throat plate and feed dog
both provided with a lip 3F6
Specific to knits
such as sweaters Runstitching Upper looper extra high throw 40H
Runstitching Standard 500
Runstitching Upper looper extra high throw 50H
Runstitching For zipper attaching 50M
For heavy-weight Runstitching Upper looper extra high throw 60H
Light- to
medium-weight
Pneumatic auto-lifter Code
Standard type AK101
For the machine provided with T040 AK32
Built-in synchronizer
Set speed＊Code
6,500sti/min SY35
Medium- to
heavy-weight Medium- to
heavy-weight materials
such as denim
■SPECIFICATIONS
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
MO-6900R Series
High-speed, Variable Top-feed, Overlock / Safety Stitch Machine
MO-6900R Series
A smooth feed mechanism free from damage on the material.
✽“sti/min” stands for “Stiches per Minute”
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●To order, please contact your nearest JUKI distributor.

MO-6904R-0D4-3F6
L〜M
13 − 3.2 2 4 1:0.7〜1:2 1〜7.5 7 DC×27 #11 7,000 For soft-chains
MO-6904R-0E4-300 1 3 − 4.0 2 4 1:0.7〜1:2 1〜7.5 7 DC×27 #11 7,000
MO-6904R-0F6-500
M〜H
13 − 4.8 3 4 1:0.7〜1:2 1〜7.5 7 DC×27 #14 7,000
MO-6904R-0H4-50M 1 3 − 6.4 2 4 1:0.7〜1:2 1〜7.5 4.5 DC×27 #16 7,000 For zipper attaching
●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.
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.
Shift of fulcrum position of the top feed dog
●Since the rake-in starting time is
consistent at all times, the feed
offers increased bite, to
demonstrating its capabilities
when sewing heavy-weight
materials such as jeans.
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.
Bottom differential-feed
micro adjustment mechanism
Bottom differential-feed
micro adjustment mechanism
Bottom and top differential-feed
micro adjustment mechanism
Bottom and top differential-feed
micro adjustment mechanism
Micro-lifter
Micro-lifter
Excellent bottom and variable top feed mechanisms.
Further increased reliability.
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.
The needle thread heat remover and needle cooler are
equipped as standard.
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.
Devices intended for conventional JUKI machines are also
interchangeable.
The machine has been developed with the intention of providing an extended service life.
●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.
Front-end fulcrum position
Fulcrums front ends
of which are fixed
●The machine is able to make
ruffles uniformly.
Rear-end fulcrum position
Fulcrums rear ends
of which are fixed
Upper
needle bar
bushing
Lower
needle bar
bushing
Upper
needle bar
bushing
Lower
needle bar
bushing
■SUBCLASS MACHINE LIST
<1-needle overlock>
For runstitching in general fabric
MO-6914R-BD4-307
L〜M
242.03.2 241:0.7〜1:2 1〜7.5 6.5 DC×27 #11 7,000
MO-6914R-BD6-307 2 4 2.0 3.2 3 4 1:0.7〜1:2 1〜7.5 6.5 DC×27 #11 7,000
MO-6914R-BE6-307 2 4 2.0 4.0 3 4 1:0.7〜1:2 1〜7.5 6.5 DC×27 #11 7,000
MO-6914R-BD6-40H
M〜H
242.03.2 341:0.7〜1:2 1〜7.5 6.5 DC×27 #11 7,000
MO-6914R-BE6-40H 2 4 2.0 4.0 3 4 1:0.7〜1:2 1〜7.5 6.5 DC×27 #11 7,000
<2-needle overlock>
For runstitching in general fabric
MO-6916R-DD6-300
L〜M
253.23.2 341:0.7〜1:2 1〜7.5 5.5 DC×27 #11 7,000
MO-6916R-DE4-300 2 5 3.2 4.0 2 4 1:0.7〜1:2 1〜7.5 5.5 DC×27 #11 7,000
MO-6916R-DE6-300 2 5 3.2 4.0 3 4 1:0.7〜1:2 1〜7.5 5.5 DC×27 #11 7,000
MO-6916R-FF6-300 2 5 4.8 4.8 3 4 1:0.7〜1:2 1〜7.5 5.5 DC×27 #11 7,000
MO-6916R-FF6-50H
M〜H
254.84.8 341:0.7〜1:2 1〜75DC×27 #16 7,000
Upper looper extra
high throw type
MO-6916R-FH6-60H 2 5 4.8 6.4 3 4.5 1:0.9〜1:1.7 1〜75DC×27 #21 7,000
For jeans
Upper looper extra
high throw type
<Safety stitching>
For runstitching in general fabric
MO-6943R-1D6-307 L〜M3 6
4.8 3.2 3 4 1:0.7〜1:2 1〜7.5 6.5 DC×27 #11 7,000
+2.0
MO-6943R-2D6-40H M~H 3 6 3.2 3.2 3 4 1:0.7〜1:2 1〜7.5 6.5 DC×27 #11 7,000
+2.0
<3-needle safety stitching>
Multi-purpose runstitching
Seams Model No. Materials
Number
of
needles
Number
of
threads
Needle
gauge
(mm)
Overedging
width (mm)
Number
of
feed dog
rows
Stitch
length
(mm)
Presser
lifting
amount
(mm) Needle system
Max.
sewing
speed
(sti/min)
Bottom
differential-
feed ratio
Remarks
Longitudinal
stroke
of top-feed
dog (mm)
Upper looper extra
high throw type
■DEVISES AND ATTACHMENTS
Chain-off thread trimming device
Model Part No. Description
T039
40044157 For 110, 115, 200V
40044158
For 220, 240, 380, 415, 440V
40043900 For 110, 115, 200V
T040
40043901
For 220, 240, 380, 415, 440V
40043902 For 110, 115, 200V
40043903 For 220, 240, 380, 415, 440V
T041S 400-60703 Pneumatic flat cutter
T045 MAT-045000A0 Pneumatic side cutter
Pneumatic chain-off thread suction device
MC-4 ―Specific to chain-off thread, pedal-operated
MC-5 ―Specific to chain-off thread
MC-8 ―Pneumatic chain-off thread + cloth chips
MC-9 ―Function of MC-8 + auto-lifter
MC-24 ―Pneumatic chain-off thread + cloth chips
Auto-lifter
AK32 GAK-320000B0 Pneumatic type (knee-operated)
AK49 GAK-490000A0 Pneumatic type (pedal-operated)
AK52 GAK-520000A0A Pneumatic type (with chain-off thread suction device)
AK101 GAK-A01000A0 Pneumatic type (for servomotor)
Gathering device
S167 MAS-167000A0 Swing-type upper-cloth gathering device
(interlocked with pedal)
―PF-0552010-B0 Air regulator (F.R. unit asm.)
―GMD-01080000×2Fixing screw for F.R. unit asm.
―F1021-003-000 Tube connector (male)
―GAS-12063000＊One-touch connector
＊Selection parts instead of the tube connector
One-touch type tape cutter
and chain-off thread
trimming device
(electromagnetic type)
Automatic tape cutter
+ chain-off thread
trimming device
(number-off-stitch
control and electro-
magnetic type)
[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
T039
T040
T041S
or
T045
Chain-off
thread
suction
device
Auto-lifter
MC-8 AK101 (JUKI servomotor)
MC-9 ―(MC-9 is equipped with auto-lifter.)
MC-5 AK32 (any motor will do)
MC-24 AK32 (any motor will do)
MC-4 ―
MC-8 AK101 (JUKI servomotor)
MC-9 ―(MC-9 is equipped with auto-lifter.)
For semi-
sunken type
For fully-
sunken type
Blind hemming device
L121 MAL-121000A0 Blind stitch hemming attachment A ruler used for blind hemming in knits
Piping folder
＊The aforementioned devices are not equipped with air regulator.
Please purchase the following components when you need to regulate air pressure.
Model Part No. Description Feature
The attachment opens with the presser foot pedal. This facilitates material
setting on the machine. Furthermore, knee-control type differential-feed
adjusting device is built in the attachment. It controls a differential-feed ratio as
desired, thereby enabling the operator to make beautiful gathers.
MO-6916R
Runstitching in general fabric
MO-6914R-BE6-307
Needle thread
heat remover
Needle thread
heat remover
Needle cooler
Needle cooler
M056 MAM-0560J0A0 Piping folder This piping folder makes a piping first, then turns up the tape.
M075 MAM-0750J0A0 Piping folder (to be used with knit tape)
This attachment can be used for both “cotton bias tape with gimp” and “knit tape”.
The operation mode can be changed over with a fingertip control.
M076 MAM-0760N0A0 Ready-made piping folder The dimension of ready-made tapes can be adjusted within the range of 8 to 13mm.
M077 MAM-0770J0A0 Piping folder for gathering The attachment makes gathers on the lower fabric while making decorative piping.
M222
MAM-2220M0A0 Piping folder upper-cloth gathering
(finished width 12mm, tape width 26mm)
MAM-2220J0A0 Piping folder upper-cloth gathering
(finished width 9mm, tape width 20mm)
M224 MAM-2240N0A0 Ready-made piping folder for upper-cloth gathering
Guide, Ruler
H153 MAH-153000A0 Cloth edge guide ruler (for overlock machine) A swing type edge guide.
H154 MAH-154000A0 Cloth edge guide ruler (for safety stitch machine)
 141 MA  -141000B0 Tape guide
This attachment is used attached on the machine head (face plate).
It is used for tapes with the width of 7mm or less.
This folder is to be used together with upper-cloth gathering device S167.
Gimp size that can be used is φ2 to φ2.5mm.
This folder is to be used together with upper-cloth gathering device S167.
Tape, of which width is 8 to 18mm, can be used.
Miscellaneous
 
 
Pneumatic chain-off thread suction device
(for 1-needle machines)
Pneumatic chain-off thread suction device
(for 1-needle machines)
Simplified device for tucking chain-off thread sewn at the beginning of sewing
in overlocked seams. (chain-off thread lower clamping method)
Simplified device for tucking chain-off thread sewn at the beginning of sewing
in overlocked seams. (chain-off thread lower clamping method)
Upper looper extra
high throw type

MO-6904R-0D4-3F6
L〜M
13 − 3.2 2 4 1:0.7〜1:2 1〜7.5 7 DC×27 #11 7,000 For soft-chains
MO-6904R-0E4-300 1 3 − 4.0 2 4 1:0.7〜1:2 1〜7.5 7 DC×27 #11 7,000
MO-6904R-0F6-500
M〜H
13 − 4.8 3 4 1:0.7〜1:2 1〜7.5 7 DC×27 #14 7,000
MO-6904R-0H4-50M 1 3 − 6.4 2 4 1:0.7〜1:2 1〜7.5 4.5 DC×27 #16 7,000 For zipper attaching
●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.
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.
Shift of fulcrum position of the top feed dog
●Since the rake-in starting time is
consistent at all times, the feed
offers increased bite, to
demonstrating its capabilities
when sewing heavy-weight
materials such as jeans.
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.
Bottom differential-feed
micro adjustment mechanism
Bottom differential-feed
micro adjustment mechanism
Bottom and top differential-feed
micro adjustment mechanism
Bottom and top differential-feed
micro adjustment mechanism
Micro-lifter
Micro-lifter
Excellent bottom and variable top feed mechanisms.
Further increased reliability.
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.
The needle thread heat remover and needle cooler are
equipped as standard.
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.
Devices intended for conventional JUKI machines are also
interchangeable.
The machine has been developed with the intention of providing an extended service life.
●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.
Front-end fulcrum position
Fulcrums front ends
of which are fixed
●The machine is able to make
ruffles uniformly.
Rear-end fulcrum position
Fulcrums rear ends
of which are fixed
Upper
needle bar
bushing
Lower
needle bar
bushing
Upper
needle bar
bushing
Lower
needle bar
bushing
■SUBCLASS MACHINE LIST
<1-needle overlock>
For runstitching in general fabric
MO-6914R-BD4-307
L〜M
242.03.2 241:0.7〜1:2 1〜7.5 6.5 DC×27 #11 7,000
MO-6914R-BD6-307 2 4 2.0 3.2 3 4 1:0.7〜1:2 1〜7.5 6.5 DC×27 #11 7,000
MO-6914R-BE6-307 2 4 2.0 4.0 3 4 1:0.7〜1:2 1〜7.5 6.5 DC×27 #11 7,000
MO-6914R-BD6-40H
M〜H
242.03.2 341:0.7〜1:2 1〜7.5 6.5 DC×27 #11 7,000
MO-6914R-BE6-40H 2 4 2.0 4.0 3 4 1:0.7〜1:2 1〜7.5 6.5 DC×27 #11 7,000
<2-needle overlock>
For runstitching in general fabric
MO-6916R-DD6-300
L〜M
253.23.2 341:0.7〜1:2 1〜7.5 5.5 DC×27 #11 7,000
MO-6916R-DE4-300 2 5 3.2 4.0 2 4 1:0.7〜1:2 1〜7.5 5.5 DC×27 #11 7,000
MO-6916R-DE6-300 2 5 3.2 4.0 3 4 1:0.7〜1:2 1〜7.5 5.5 DC×27 #11 7,000
MO-6916R-FF6-300 2 5 4.8 4.8 3 4 1:0.7〜1:2 1〜7.5 5.5 DC×27 #11 7,000
MO-6916R-FF6-50H
M〜H
254.84.8 341:0.7〜1:2 1〜75DC×27 #16 7,000
Upper looper extra
high throw type
MO-6916R-FH6-60H 2 5 4.8 6.4 3 4.5 1:0.9〜1:1.7 1〜75DC×27 #21 7,000
For jeans
Upper looper extra
high throw type
<Safety stitching>
For runstitching in general fabric
MO-6943R-1D6-307 L〜M3 6
4.8 3.2 3 4 1:0.7〜1:2 1〜7.5 6.5 DC×27 #11 7,000
+2.0
MO-6943R-2D6-40H M~H 3 6 3.2 3.2 3 4 1:0.7〜1:2 1〜7.5 6.5 DC×27 #11 7,000
+2.0
<3-needle safety stitching>
Multi-purpose runstitching
Seams Model No. Materials
Number
of
needles
Number
of
threads
Needle
gauge
(mm)
Overedging
width (mm)
Number
of
feed dog
rows
Stitch
length
(mm)
Presser
lifting
amount
(mm) Needle system
Max.
sewing
speed
(sti/min)
Bottom
differential-
feed ratio
Remarks
Longitudinal
stroke
of top-feed
dog (mm)
Upper looper extra
high throw type
■DEVISES AND ATTACHMENTS
Chain-off thread trimming device
Model Part No. Description
T039
40044157 For 110, 115, 200V
40044158
For 220, 240, 380, 415, 440V
40043900 For 110, 115, 200V
T040
40043901
For 220, 240, 380, 415, 440V
40043902 For 110, 115, 200V
40043903 For 220, 240, 380, 415, 440V
T041S 400-60703 Pneumatic flat cutter
T045 MAT-045000A0 Pneumatic side cutter
Pneumatic chain-off thread suction device
MC-4 ―Specific to chain-off thread, pedal-operated
MC-5 ―Specific to chain-off thread
MC-8 ―Pneumatic chain-off thread + cloth chips
MC-9 ―Function of MC-8 + auto-lifter
MC-24 ―Pneumatic chain-off thread + cloth chips
Auto-lifter
AK32 GAK-320000B0 Pneumatic type (knee-operated)
AK49 GAK-490000A0 Pneumatic type (pedal-operated)
AK52 GAK-520000A0A Pneumatic type (with chain-off thread suction device)
AK101 GAK-A01000A0 Pneumatic type (for servomotor)
Gathering device
S167 MAS-167000A0 Swing-type upper-cloth gathering device
(interlocked with pedal)
―PF-0552010-B0 Air regulator (F.R. unit asm.)
―GMD-01080000×2Fixing screw for F.R. unit asm.
―F1021-003-000 Tube connector (male)
―GAS-12063000＊One-touch connector
＊Selection parts instead of the tube connector
One-touch type tape cutter
and chain-off thread
trimming device
(electromagnetic type)
Automatic tape cutter
+ chain-off thread
trimming device
(number-off-stitch
control and electro-
magnetic type)
[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
T039
T040
T041S
or
T045
Chain-off
thread
suction
device
Auto-lifter
MC-8 AK101 (JUKI servomotor)
MC-9 ―(MC-9 is equipped with auto-lifter.)
MC-5 AK32 (any motor will do)
MC-24 AK32 (any motor will do)
MC-4 ―
MC-8 AK101 (JUKI servomotor)
MC-9 ―(MC-9 is equipped with auto-lifter.)
For semi-
sunken type
For fully-
sunken type
Blind hemming device
L121 MAL-121000A0 Blind stitch hemming attachment A ruler used for blind hemming in knits
Piping folder
＊The aforementioned devices are not equipped with air regulator.
Please purchase the following components when you need to regulate air pressure.
Model Part No. Description Feature
The attachment opens with the presser foot pedal. This facilitates material
setting on the machine. Furthermore, knee-control type differential-feed
adjusting device is built in the attachment. It controls a differential-feed ratio as
desired, thereby enabling the operator to make beautiful gathers.
MO-6916R
Runstitching in general fabric
MO-6914R-BE6-307
Needle thread
heat remover
Needle thread
heat remover
Needle cooler
Needle cooler
M056 MAM-0560J0A0 Piping folder This piping folder makes a piping first, then turns up the tape.
M075 MAM-0750J0A0 Piping folder (to be used with knit tape)
This attachment can be used for both “cotton bias tape with gimp” and “knit tape”.
The operation mode can be changed over with a fingertip control.
M076 MAM-0760N0A0 Ready-made piping folder The dimension of ready-made tapes can be adjusted within the range of 8 to 13mm.
M077 MAM-0770J0A0 Piping folder for gathering The attachment makes gathers on the lower fabric while making decorative piping.
M222
MAM-2220M0A0 Piping folder upper-cloth gathering
(finished width 12mm, tape width 26mm)
MAM-2220J0A0 Piping folder upper-cloth gathering
(finished width 9mm, tape width 20mm)
M224 MAM-2240N0A0 Ready-made piping folder for upper-cloth gathering
Guide, Ruler
H153 MAH-153000A0 Cloth edge guide ruler (for overlock machine) A swing type edge guide.
H154 MAH-154000A0 Cloth edge guide ruler (for safety stitch machine)
 141 MA  -141000B0 Tape guide
This attachment is used attached on the machine head (face plate).
It is used for tapes with the width of 7mm or less.
This folder is to be used together with upper-cloth gathering device S167.
Gimp size that can be used is φ2 to φ2.5mm.
This folder is to be used together with upper-cloth gathering device S167.
Tape, of which width is 8 to 18mm, can be used.
Miscellaneous
 
 
Pneumatic chain-off thread suction device
(for 1-needle machines)
Pneumatic chain-off thread suction device
(for 1-needle machines)
Simplified device for tucking chain-off thread sewn at the beginning of sewing
in overlocked seams. (chain-off thread lower clamping method)
Simplified device for tucking chain-off thread sewn at the beginning of sewing
in overlocked seams. (chain-off thread lower clamping method)
Upper looper extra
high throw type

MO-6904R-0D4-3F6
L〜M
13 − 3.2 2 4 1:0.7〜1:2 1〜7.5 7 DC×27 #11 7,000 For soft-chains
MO-6904R-0E4-300 1 3 − 4.0 2 4 1:0.7〜1:2 1〜7.5 7 DC×27 #11 7,000
MO-6904R-0F6-500
M〜H
13 − 4.8 3 4 1:0.7〜1:2 1〜7.5 7 DC×27 #14 7,000
MO-6904R-0H4-50M 1 3 − 6.4 2 4 1:0.7〜1:2 1〜7.5 4.5 DC×27 #16 7,000 For zipper attaching
●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.
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.
Shift of fulcrum position of the top feed dog
●Since the rake-in starting time is
consistent at all times, the feed
offers increased bite, to
demonstrating its capabilities
when sewing heavy-weight
materials such as jeans.
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.
Bottom differential-feed
micro adjustment mechanism
Bottom differential-feed
micro adjustment mechanism
Bottom and top differential-feed
micro adjustment mechanism
Bottom and top differential-feed
micro adjustment mechanism
Micro-lifter
Micro-lifter
Excellent bottom and variable top feed mechanisms.
Further increased reliability.
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.
The needle thread heat remover and needle cooler are
equipped as standard.
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.
Devices intended for conventional JUKI machines are also
interchangeable.
The machine has been developed with the intention of providing an extended service life.
●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.
Front-end fulcrum position
Fulcrums front ends
of which are fixed
●The machine is able to make
ruffles uniformly.
Rear-end fulcrum position
Fulcrums rear ends
of which are fixed
Upper
needle bar
bushing
Lower
needle bar
bushing
Upper
needle bar
bushing
Lower
needle bar
bushing
■SUBCLASS MACHINE LIST
<1-needle overlock>
For runstitching in general fabric
MO-6914R-BD4-307
L〜M
242.03.2 241:0.7〜1:2 1〜7.5 6.5 DC×27 #11 7,000
MO-6914R-BD6-307 2 4 2.0 3.2 3 4 1:0.7〜1:2 1〜7.5 6.5 DC×27 #11 7,000
MO-6914R-BE6-307 2 4 2.0 4.0 3 4 1:0.7〜1:2 1〜7.5 6.5 DC×27 #11 7,000
MO-6914R-BD6-40H
M〜H
242.03.2 341:0.7〜1:2 1〜7.5 6.5 DC×27 #11 7,000
MO-6914R-BE6-40H 2 4 2.0 4.0 3 4 1:0.7〜1:2 1〜7.5 6.5 DC×27 #11 7,000
<2-needle overlock>
For runstitching in general fabric
MO-6916R-DD6-300
L〜M
253.23.2 341:0.7〜1:2 1〜7.5 5.5 DC×27 #11 7,000
MO-6916R-DE4-300 2 5 3.2 4.0 2 4 1:0.7〜1:2 1〜7.5 5.5 DC×27 #11 7,000
MO-6916R-DE6-300 2 5 3.2 4.0 3 4 1:0.7〜1:2 1〜7.5 5.5 DC×27 #11 7,000
MO-6916R-FF6-300 2 5 4.8 4.8 3 4 1:0.7〜1:2 1〜7.5 5.5 DC×27 #11 7,000
MO-6916R-FF6-50H
M〜H
254.84.8 341:0.7〜1:2 1〜75DC×27 #16 7,000
Upper looper extra
high throw type
MO-6916R-FH6-60H 2 5 4.8 6.4 3 4.5 1:0.9〜1:1.7 1〜75DC×27 #21 7,000
For jeans
Upper looper extra
high throw type
<Safety stitching>
For runstitching in general fabric
MO-6943R-1D6-307 L〜M3 6
4.8 3.2 3 4 1:0.7〜1:2 1〜7.5 6.5 DC×27 #11 7,000
+2.0
MO-6943R-2D6-40H M~H 3 6 3.2 3.2 3 4 1:0.7〜1:2 1〜7.5 6.5 DC×27 #11 7,000
+2.0
<3-needle safety stitching>
Multi-purpose runstitching
Seams Model No. Materials
Number
of
needles
Number
of
threads
Needle
gauge
(mm)
Overedging
width (mm)
Number
of
feed dog
rows
Stitch
length
(mm)
Presser
lifting
amount
(mm) Needle system
Max.
sewing
speed
(sti/min)
Bottom
differential-
feed ratio
Remarks
Longitudinal
stroke
of top-feed
dog (mm)
Upper looper extra
high throw type
■DEVISES AND ATTACHMENTS
Chain-off thread trimming device
Model Part No. Description
T039
40044157 For 110, 115, 200V
40044158
For 220, 240, 380, 415, 440V
40043900 For 110, 115, 200V
T040
40043901
For 220, 240, 380, 415, 440V
40043902 For 110, 115, 200V
40043903 For 220, 240, 380, 415, 440V
T041S 400-60703 Pneumatic flat cutter
T045 MAT-045000A0 Pneumatic side cutter
Pneumatic chain-off thread suction device
MC-4 ―Specific to chain-off thread, pedal-operated
MC-5 ―Specific to chain-off thread
MC-8 ―Pneumatic chain-off thread + cloth chips
MC-9 ―Function of MC-8 + auto-lifter
MC-24 ―Pneumatic chain-off thread + cloth chips
Auto-lifter
AK32 GAK-320000B0 Pneumatic type (knee-operated)
AK49 GAK-490000A0 Pneumatic type (pedal-operated)
AK52 GAK-520000A0A Pneumatic type (with chain-off thread suction device)
AK101 GAK-A01000A0 Pneumatic type (for servomotor)
Gathering device
S167 MAS-167000A0 Swing-type upper-cloth gathering device
(interlocked with pedal)
―PF-0552010-B0 Air regulator (F.R. unit asm.)
―GMD-01080000×2Fixing screw for F.R. unit asm.
―F1021-003-000 Tube connector (male)
―GAS-12063000＊One-touch connector
＊Selection parts instead of the tube connector
One-touch type tape cutter
and chain-off thread
trimming device
(electromagnetic type)
Automatic tape cutter
+ chain-off thread
trimming device
(number-off-stitch
control and electro-
magnetic type)
[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
T039
T040
T041S
or
T045
Chain-off
thread
suction
device
Auto-lifter
MC-8 AK101 (JUKI servomotor)
MC-9 ―(MC-9 is equipped with auto-lifter.)
MC-5 AK32 (any motor will do)
MC-24 AK32 (any motor will do)
MC-4 ―
MC-8 AK101 (JUKI servomotor)
MC-9 ―(MC-9 is equipped with auto-lifter.)
For semi-
sunken type
For fully-
sunken type
Blind hemming device
L121 MAL-121000A0 Blind stitch hemming attachment A ruler used for blind hemming in knits
Piping folder
＊The aforementioned devices are not equipped with air regulator.
Please purchase the following components when you need to regulate air pressure.
Model Part No. Description Feature
The attachment opens with the presser foot pedal. This facilitates material
setting on the machine. Furthermore, knee-control type differential-feed
adjusting device is built in the attachment. It controls a differential-feed ratio as
desired, thereby enabling the operator to make beautiful gathers.
MO-6916R
Runstitching in general fabric
MO-6914R-BE6-307
Needle thread
heat remover
Needle thread
heat remover
Needle cooler
Needle cooler
M056 MAM-0560J0A0 Piping folder This piping folder makes a piping first, then turns up the tape.
M075 MAM-0750J0A0 Piping folder (to be used with knit tape)
This attachment can be used for both “cotton bias tape with gimp” and “knit tape”.
The operation mode can be changed over with a fingertip control.
M076 MAM-0760N0A0 Ready-made piping folder The dimension of ready-made tapes can be adjusted within the range of 8 to 13mm.
M077 MAM-0770J0A0 Piping folder for gathering The attachment makes gathers on the lower fabric while making decorative piping.
M222
MAM-2220M0A0 Piping folder upper-cloth gathering
(finished width 12mm, tape width 26mm)
MAM-2220J0A0 Piping folder upper-cloth gathering
(finished width 9mm, tape width 20mm)
M224 MAM-2240N0A0 Ready-made piping folder for upper-cloth gathering
Guide, Ruler
H153 MAH-153000A0 Cloth edge guide ruler (for overlock machine) A swing type edge guide.
H154 MAH-154000A0 Cloth edge guide ruler (for safety stitch machine)
 141 MA  -141000B0 Tape guide
This attachment is used attached on the machine head (face plate).
It is used for tapes with the width of 7mm or less.
This folder is to be used together with upper-cloth gathering device S167.
Gimp size that can be used is φ2 to φ2.5mm.
This folder is to be used together with upper-cloth gathering device S167.
Tape, of which width is 8 to 18mm, can be used.
Miscellaneous
 
 
Pneumatic chain-off thread suction device
(for 1-needle machines)
Pneumatic chain-off thread suction device
(for 1-needle machines)
Simplified device for tucking chain-off thread sewn at the beginning of sewing
in overlocked seams. (chain-off thread lower clamping method)
Simplified device for tucking chain-off thread sewn at the beginning of sewing
in overlocked seams. (chain-off thread lower clamping method)
Upper looper extra
high throw type

MO-6914R
■AC SERVOMOTOR/Machine head
MO69 R /AK101/SY35
■WHEN YOU PLACE ORDERS
Please note when placing orders, that the model name should be written as follows:
＊Only the pneumatic auto-lifter is prepared for the
MO-6900R series.
＊Select a sewing speed that
is lower than the machine
head's maximum sewing
speed by 500sti/min.
MO69 R
Stitch type U.S.A Code
1-needle overlock 504 04
2-needle overlock 514 14
2-needle safety stitch 516 16
3-needle safety stitch 43
Type Code
Variable top-feed R
Needle Overedging
gauge (mm) width (mm) Feed dog Code
― 3.2 2-row 0D4
― 4.0 2-row 0E4
― 4.8 3-row 0F6
― 6.4 2-row 0H4
2.0 3.2 2-row BD4
2.0 3.2 3-row BD6
2.0 4.0 3-row BE6
3.2 3.2 3-row DD6
3.2 4.0 2-row DE4
3.2 4.0 3-row DE6
4.8 4.8 3-row FF6
4.8 6.4 3-row FH6
4.8+2.0 3.2 3-row 1D6
3.2+2.0 3.2 3-row 2D6
●To order, please contact your nearest JUKI distributor.
Material Application Special machine Code
classification
Runstitching Standard 300
For general fabrics Runstitching Upper looper high throw 307
Soft-chain Throat plate and feed dog
both provided with a lip 3F6
Specific to knits
such as sweaters Runstitching Upper looper extra high throw 40H
Runstitching Standard 500
Runstitching Upper looper extra high throw 50H
Runstitching For zipper attaching 50M
For heavy-weight Runstitching Upper looper extra high throw 60H
Light- to
medium-weight
Pneumatic auto-lifter Code
Standard type AK101
For the machine provided with T040 AK32
Built-in synchronizer
Set speed＊Code
6,500sti/min SY35
Medium- to
heavy-weight Medium- to
heavy-weight materials
such as denim
■SPECIFICATIONS
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
MO-6900R Series
High-speed, Variable Top-feed, Overlock / Safety Stitch Machine
MO-6900R Series
A smooth feed mechanism free from damage on the material.
✽“sti/min” stands for “Stiches per Minute”

       
          
      
       
            
 
! "         
  
#! $    
%! &    '( !
)! *      !
+! *    
,! -        
  !
   
✽ .    /       
✽ *            
✽ "    '     
0"01&* # 2   3!
#'' ".4*435- "33'.6-
"0570 #,'8++ 3239
2609& 
8!)#'%+:'##+)
;3< 
8!)#'%+:'##:)
==/
●To order, please contact your nearest JUKI distributor.

MO-6914R
■AC SERVOMOTOR/Machine head
MO69 R /AK101/SY35
■WHEN YOU PLACE ORDERS
Please note when placing orders, that the model name should be written as follows:
＊Only the pneumatic auto-lifter is prepared for the
MO-6900R series.
＊Select a sewing speed that
is lower than the machine
head's maximum sewing
speed by 500sti/min.
MO69 R
Stitch type U.S.A Code
1-needle overlock 504 04
2-needle overlock 514 14
2-needle safety stitch 516 16
3-needle safety stitch 43
Type Code
Variable top-feed R
Needle Overedging
gauge (mm) width (mm) Feed dog Code
― 3.2 2-row 0D4
― 4.0 2-row 0E4
― 4.8 3-row 0F6
― 6.4 2-row 0H4
2.0 3.2 2-row BD4
2.0 3.2 3-row BD6
2.0 4.0 3-row BE6
3.2 3.2 3-row DD6
3.2 4.0 2-row DE4
3.2 4.0 3-row DE6
4.8 4.8 3-row FF6
4.8 6.4 3-row FH6
4.8+2.0 3.2 3-row 1D6
3.2+2.0 3.2 3-row 2D6
●To order, please contact your nearest JUKI distributor.
Material Application Special machine Code
classification
Runstitching Standard 300
For general fabrics Runstitching Upper looper high throw 307
Soft-chain Throat plate and feed dog
both provided with a lip 3F6
Specific to knits
such as sweaters Runstitching Upper looper extra high throw 40H
Runstitching Standard 500
Runstitching Upper looper extra high throw 50H
Runstitching For zipper attaching 50M
For heavy-weight Runstitching Upper looper extra high throw 60H
Light- to
medium-weight
Pneumatic auto-lifter Code
Standard type AK101
For the machine provided with T040 AK32
Built-in synchronizer
Set speed＊Code
6,500sti/min SY35
Medium- to
heavy-weight Medium- to
heavy-weight materials
such as denim
■SPECIFICATIONS
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
MO-6900R Series
High-speed, Variable Top-feed, Overlock / Safety Stitch Machine
MO-6900R Series
A smooth feed mechanism free from damage on the material.
✽“sti/min” stands for “Stiches per Minute”

       
          
      
       
            
 
! "         
  
#! $    
%! &    '( !
)! *      !
+! *    
,! -        
  !
   
✽ .    /       
✽ *            
✽ "    '     
0"01&* # 2   3!
#'' ".4*435- "33'.6-
"0570 #,'8++ 3239
2609& 
8!)#'%+:'##+)
;3< 
8!)#'%+:'##:)
==/
●To order, please contact your nearest JUKI distributor.