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Bottom-feed, Overlock / Safety Stitch Machine
for Extra Heavy-weight Materials
MOJ-3900 SERIES
The MOJ-3900 series incorporates a newly developed feed mechanism
that permits independent motion of the top and bottom-feed dogs.
With its upgraded efficiency of feed and stronger clamping force, the
feed mechanism eliminates irregular feed of extra heavy-weight materials,
thereby helping improve the quality of finished products and enhance
efficiency in sewing.
The machines are equipped with a full range of newly developed
functions that are ideal for the sewing extra heavy-weight materials
including, an extra high-throw upper looper (equipped as standard),
tractor foot, and exclusive feed dog.
outstanding capabilities in the sewing of various kinds of extra
heavy-weight materials, including raised materials, mats and carpets.
SPECIFICATIONS
Model name
Stitch type
Stitch style in the U.S.A.
Feed system
Max. sewing speed
Stitch length
Needle gauge (mm)
Overedging width (mm)
Bottom differential-feed ratio
Needle bar stroke
Inclination angle of the needle
Needle (at the time of delivery)
Vertical stroke of top-feed dog
Longitudinal stroke of top-feed dog
Max. lift of the presser foot
Max. presser foot pressure
Stitch length adjusting method
Differential-feed adjusting method
Upper knife
Weight of the machine head
Lubrication
Lubricating oil
Needle cooler
Needle thread heat remover
SUBCLASS MACHINE LIST
Number
Seams
Model No.
needles
MOJ-3904E-0A6-600
MOJ-3914E-CH6-600
MOJ-3916E-FF6-700
MOJ-3916E-FH6-700
MOJ-3943E-FDE6-600
The machines demonstrate
MOJ-3904
1-needle, 3-thread
variable top-feed overlock
504
Longitudinal stroke of top-feed is 6mm or less : 6,000rpm
Longitudinal stroke of top-feed is 6mm to 8.5mm : 5,500rpm
2.5
5mm
4.8
For gathering 1: 1.8 (max. 1: 3.8)
For stretching 1: 0.6
GROZ-BECKERT
142 5 (#130)
Number
Number
Needle
Overedging
feed dog
of
of
gauge
width
threads
(mm)
(mm)
1
3
–
4.8, 6.4
2
4
2.6
6.4
2
5
4.8
4.8
2
5
4.8
6.4
4.8
3
6
4.0
+ 3.2
MOJ-3914
2-needle, 4-thread
variable top-feed overlock
514
Variable top-feed (rake-in type)
2.5 4mm
2.6
6.4
For gathering 1: 2.0 (max. 1: 3.8)
For stretching 1: 0.7 (max. 1: 0.6)
28.8mm
20°
GROZ-BECKERT
142 5 (#110)
8.5mm
1 8.5mm
8mm
58.8N (6kg)
By push-button
By lever (with micro-adjustment)
Cemented square knife
30kg
Automatic
JUKI New Defrix Oil No.2 (equivalent to ISO VG32)
By silicon oil lubricating unit for the needle tip
By silicon oil lubricating unit for the needle thread
Max.
Longitudinal
of
stitch
Bottom
stroke of
length
top-feed dog
differential-
rows
(mm)
feed ratio
(mm)
3
5
1: 3.8 1: 0.6
8
3
4
1: 3.8 1: 0.6
8
3
5
1: 3.8 1: 0.6
8
3
5
1: 3.8 1: 0.6
8
3
5
1: 3.8 1: 0.6
8
MOJ-3916
2-needle, 5-thread
variable top-feed safety stitch
516
2.5 5mm
4.8
4.8, 6.4
For gathering 1: 1.8 (max. 1: 3.8)
For stretching 1: 0.6
GROZ-BECKERT
142 5 (#130)
Presser
Max.
Remarks
lifting
sewing
amount
speed
Needle system
(mm)
(rpm)
For runstitching
Groz
extra heavy-weight
1 8.5
6,000
materials such as
142 5 #130
denim and drill.
Groz
For overedging
1 8.5
6,000
jersey, etc.
142 5 #110
Groz
1 8.5
6,000
142 5 #130
For safety stitching
Groz
extra heavy-weight
1 8.5
6,000
142 5 #130
materials such as
denim and drill.
Groz
1 8.5
6,000
142 5 #130
MOJ-3900 SERIES (June, 2001) 1/2
3
MOJ-3904
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