JUKI DDL-5550N Handbook page 60

Variable Top-feed, Overlock / Safety Stitch Machine
for Extra heavy-weight materials
MO-6900J Series
● The machine incorporates a mechanism and parts that are optimum
for the sewing of extra heavy-weight materials, such as an extra
high-lift type upper looper, tractor foot and coarse type feed dog.
It demonstrates an excellent performance ability in the sewing of
various kinds of heavy-weight materials such as jeans, raised fabric
materials, mats and carpets.
● The MO-6900J Series comes with a newly-developed feed mechanism
that moves the top and bottom feeds separately.
feeding capacity and stronger cloth-biting force, the feed
mechanism prevents uneven material feed when sewing extra heavy-
weight materials.
SPECIFICATIONS
Model name
Stitch type
Stitch style in the U.S.A.
Max. sewing speed
Stitch length
Needle gauge (mm)
Overedging width (mm)
Bottom differential feed ratio
Needle bar stroke
Inclination angle of the needle
Needle bar bushing
Needle
Vertical stroke of top feed dog
Longitudinal stroke of top feed dog
Max. lift of the presser foot
Max. presser foot pressure
Stitch adjusting method
Bottom differential feed adjusting method
Top differential feed adjusting method
Weight of the machine head
Lubrication
Lubricating oil
Needle cooler
Needle thread heat remover
Micro-lifter
SUBCLASS MACHINE LIST
Number
Materials of
Model No.
needles
MO-6904J-0F6-700 1
MO-6914J-CH6-700 EH 2
MO-6916J-FF6-700 2
MO-6916J-FH6-700 2
MO-6916J-FF6-70Q 2
With its improved
MO-6904J
1-needle overlock
504
2.5 5mm
4.8
For gathering 1:1.75 (max. 1:3.8)
For stretching 1:0.7 (max. 1:0.6)
2.7 7mm (it differs with the machine's specifications.)
Number
of Stitch
Number Needle Overedging
of gauge width (mm) feed dog length
threads (mm) rows (mm)
3 4.8 3
4 2.6 6.4 3
5 4.8 4.8 3
5 4.8 6.4 3
5 4.8 4.8 3
MO-6914J
2-needle overlock
514
6,000rpm
2.5 4mm
2.6
6.4
For gathering 1:2 (max. 1:3.8)
For stretching 1:0.8 (max. 1:0.6)
28.8mm
20°
Upper/lower bushing method
DO 5 (excluding some subclass model)
8.5mm
8mm (excluding some subclass model)
63.7N (6.5kg)
By push-button
By lever (with micro-adjustment)
By lever (with micro-adjustment)
29kg
Automatic
JUKI Machine Oil 18 (equivalent to ISO VG18)
Provided as standard
Provided as standard
Provided as standard
Longitudinal Presser
stroke lifting
Bottom
differential- of top-feed amount
feed ratio dog (mm) (mm)
5 1:0.6 1:1.75 2.7 7 8
4 1:0.7 1:2 2.7 7 8
5 1:0.6 1:1.75 2.7 7 8
5 1:0.6 1:1.75 2.7 7 8
5 1:0.7 1:1.75 2.7 7 8
MO-6916J
MO-6916J
Safety stitching
516
2.5 5mm
4.8
4.8, 6.4
For gathering 1:1.75 (max. 1:3.8)
For stretching 1:0.7 (max. 1:0.6)
Remarks
Max.
sewing
speed
Needle system
(rpm)
For runstitching
DO 5 #21 6,000 extra heavy- weight
materials such as denim
DO 5 #18 6,000 For overedging jersey, etc.
For safety stitching
DO 5 #21 6,000
extra heavy-weight
DO 5 #21 6,000
materials such as denim
DC 27 #16 6,000 For safety stitching bathrobe, etc.
MO-6900J Series (September, 2003) 1/2
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