JUKI DDL-5550N Handbook page 53

High-speed, Variable Top-feed, Overlock / Safety Stitch Machine
MO-6900R Series
● 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
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 mechanism
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
Materials
Seams Model No.
■ 1-needle overlock
● For runstitching in general fabric
MO-6904R-0D4-3F6
L M
MO-6904R-0E4-300
MO-6904R-0F6-500
M H
MO-6904R-0H4-50M
MO-6904R
1-needle overlock
504
7,000rpm (longitudinal stroke of top feed dog is 6mm or less)
6,000rpm (longitudinal stroke of top feed dog is 6 8.5mm)
3.2, 4.0, 4.8, 6.4
For gathering 1: 2 (max. 1: 4), For stretching 1: 0.7 (max. 1: 0.6)
3.5 8.5mm (it differs with the machine's specifications.)
Number
Number Number Needle Overedging
of of gauge width (mm) feed dog
needles threads (mm) rows
1 3 3.2
1 3 4.0
1 3 4.8
1 3 6.4
MO-6914R
2-needle overlock
514
0.8 4mm
2.0
3.2, 4.0
24.5mm
20
Needle bar method and upper/lower bushing
DC 27 (excluding some subclass model)
1 7.5mm (it differs with the machine's specifications.)
7mm (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
of Stitch stroke
Bottom
length differential- of top-feed
(mm) feed ratio dog (mm)
2 4 1:0.7 1: 2 1 7.5
2 4 1:0.7 1: 2 1 7.5
3 4 1: 0.7 1: 2 1 7.5
2 4 1: 0.7 1: 2 1 7.5
MO-6916R
Safety stitching
516
1.5 4mm
3.2, 4.8, 4.8+2.0
3.2, 4.0, 4.8, 6.4
Remarks
Presser Max.
lifting sewing
amount speed
Needle system
(mm) (rpm)
7 DC 27 #11 7,000 For soft-chains
7 DC 27 #11 7,000
7 DC 27 #14 7,000
4.5 DC 27 #16 7,000 For zipper attaching
MO-6900R Series (September, 2003) 1/3
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MO-6914R