MO-6900R Series (September, 2003) 1/3
● 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.
● 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.
SPECIFICATIONS
High-speed, Variable Top-feed, Overlock / Safety Stitch Machine
M
O
-6900R Series
MO-6914R
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
7,000rpm (longitudinal stroke of top feed dog is 6mm or less)
6,000rpm (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
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 (6.5kg)
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
SUBCLASS MACHINE LIST
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
■ 1-needle overlock
● For runstitching in general fabric
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
(rpm)
Bottom
differential-
feed ratio
Remarks
Longitudinal
stroke
of top-feed
dog (mm)
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