JUKI LH-3126F Installation guide

The LH-3126F is the most optimally suited model for sewing brassieres.
With its various capabilities such as topstitching and tape-attachment
on the peripheries of bra cups, the machine flexibly responds to a wider
range of sewing requirements for sewing brassieres.
2-needle, Needle-feed/Bottom-feed, Lockstitch Machine
For Foundation
LH-3126F
●Lining tape attachment folder (M060) is optionally available.

Operating noise of the machine
is dramatically reduced The strokes of the right and
left thread take-up are
separately adjustable The adjustment range of the
needle thread tension is widened
●The operating noise produced by the
hook and thread take-up lever is
substantially reduced.
With its decreased noise level and
improved sound quality, the machine
offers a comfortable work environment
that reduces operator fatigue.
●The improved opener reduces the
impact against the bobbin. By reducing
variations of bobbin thread tension
caused by the opener, irregular stitches
are eliminated.
The machine has two thread take-up guides,
one for the right thread and the other for the
left thread. As a result, the strokes of the
right and left thread take-ups are separately
adjustable. When the right and left portions
of the material differ in thickness, the
strokes of the thread take-up can be
accurately adjusted for the right and left
threads. With this capability, the machine
delivers consistently improved seam quality.
●The needle tension controller has been
changed to the 1-needle, lockstitch type.
The style of the thread take-up spring
has been modified not only to allow the
spring to work more effectively, but also
to widen the needle thread adjustment
range compared with that possible with
the conventional thread take-up spring.
The thread tension can be easily
adjusted when changing the material to
be sewn. In addition, the thread tension
is further stabilized even when sewing
under a lower thread tension.
●
To downsize the design, the thread take-
up spring is integrated with the tension-
regulating knob. As a result, these parts
project out less from the machine, opening
up a clearer view of the area around the
needle entry for easier operation. In
addition, the machine offers easier
threading of the needle as compared with
the conventional machine head.
●One available model is equipped with a newly developed a hook
that uses a non-rotational bobbin for the vertical-axis hook. For
the hook with a non-rotational bobbin, the bobbin is secured in
the bobbin case and does not rotate as the bobbin thread feeds.
This prevents variations in thread tension caused by changes in
the amount of remaining bobbin thread and idling of the bobbin.
With this hook and bobbin, the machine is able to use the full
amount of bobbin thread and sew consistent with a lower thread
tension compared with that used with the conventional hook.
●The machine type provided with a latch hook is also available.
Select the type that fits your purpose.
(The latch hook is exclusively designed for the LH-3126F.
However, the conventional bobbin can be used with the latch
hook.)
Hook with a non-rotational bobbin Specific latch hook
Hook HookBobbin case Bobbin Bobbin
The machine is equipped with a hook that uses a non-rotational bobbin

Height and inclination of the
feed dog can be adjusted Thefeedmethodcanbechanged
over between the needle-feed
and the bottom-feed Upgraded maintainability
Both the height and inclination of the
feed dog are easily adjustable. Adjust
the feed dog according to sewing
conditions such as the specification,
process, and material to be sewn.
Through a simple adjustment of the
machine and replacement of the gauge, the
feed method can be changed over between
the needle-feed and bottom-feed types.
When the bottom-feed method is selected,
the needle entry position can be adjusted
(in the feeding direction) using the needle-
feed/bottom-feed change-over mechanism.
This allows the machine to flexibly adapt to
commercially available gauges.
●When replacing the gauge, the screw
in the hook-driving shaft saddle can be
tightened diagonally from above to
ensure safety and operability.
●The hook is lubricated automatically
when adjusting the oil discharge. This
helps stabilize and regulate amount of
oil in the hook more effectively.
■WHENYOU PLACE ORDERS
Please note when placing orders, that the model name should be written as follows:
●To order, please contact your nearest JUKI distributor.
Needle
gauge
mm
3.2
4.8
6.4
7.1
7.9
Feed
Needle-feed
Bottom-feed✽
inch
1/8
3/16
1/4
9/32
5/16
B
D
F
G
H
Code Code
Code
1P
4✽
Attachment
Combination availability table
C
Automatic reverse
feed function
Automatic reverse
feed function SC-910
SC-800
Standard throat plate, standard slide plate,
standard presser foot
Pedal switch type
(AK89)✽
Not provided
Provided
Code
A
B00
0B
Hook
Latch hook
Hook with
non-rotational
bobbin
Throat plate for tape-attachment, slide plate for tape-
attachment, presser foot for tape-attachment
Code
0
Motor✽
Compatible with clutch motor
(without synchronizer and
resistor pack)
1
Compatible with SC-800 and EC-10B
(with built-in synchronizer and
resistor pack)
Code
S
Auto-lifter
Not provided
Motor
0
(Not provided)
B
(Provided)
Cluth motor EC-10B
Where "0" is selected
Where "1" is selected
Where "0" is selected
Where "1" is selected
○
×
×
×
×
○
×
○
×
○
×
○
Code
Z
✽For the "Bottom-
feed: B," only the
needle gauges B,
D, and F are
applicable.
✽For the above category 4, select the feed category A (needle-feed). ✽For the AK-89, select the
motor compatibility category 1
(SC-910, SC-800 or EC-10B).
✽Refer to the combination availability table.
✽Refer to the combination
availability table.
LH3126F
Adjustment of the
feed dog inclination
Adjustment of the
feed dog height
Hook oil
regulating screw
Needle-feed
Bottom-feed
■SPECIFICATIONS ■OPTIONS
■WHENYOU PLACE ORDERS
■SPECIFICATIONS ■OPTIONS
●Micro-lifter
Part No.: 236-11056
This device can be installed on
the back of the face plate. It is
very convenient for frequent
use.
●
Automatic reverse feed kit
Part No.: 226-56854
The automatic reverse feed
function device can be moun-
ted on the machine after the
setup. This device can be in-
stalled on the back of the face
plate. It is very convenient for
frequent use.
●Tension-free feeder
(tape feeder)V059
Part No.: MAV-059000AA
The amount of tape to be fed
can be adjusted in accordance
with the sewing speed of the
machine. It is adaptable to
processes for attaching rein-
forcement tape, attaching elas-
tic tape or lace to foundation.
●Tape cutter AT-36
The tape cutter is able to cut
the tape just behind the press-
er foot (20mm away from the
needle entry point).
The cutter pressure is adjust-
able according to the material
thickness.
Max. sewing speed
Max. stitch length
Thread take-up
Needle bar stroke
Lift of the presser foot
Hook (selectable)
Needle
(at the time of delivery)
Feed system
Lubrication
Distance from
needle to machine arm
Bed size
Weight of the machine
head
3,000rpm
4mm (normal / reverse feed)
Slide type
33.4mm
By hand : 5.5mm / By knee : 12mm
Vertical-axis hook (regular fold)
Specific latch hook or specific hook with non-rotational bobbin
DP
×
5 (#10) #9
〜
#11
Change-over between needle-feed / bottom-feed
Fully automatic lubrication system by means of plunger pump
245mm
517mm
×
178mm
43kg
Adjustment of the
feed dog inclination
Adjustment of the
feed dog height
Hook oil
regulating screw
Needle-feed
Bottom-feed
■WHENYOU PLACE ORDERS
■SPECIFICATIONS ■OPTIONS

1
2
1.4
1.15
φ1.4
φ1.6 φ2.0
φ2.2
1.7
φ1.4
1.7
1.15
φ1.4
1.7
φ1.4
1.6
1.15
φ1.4
1.7
φ1.4
■Gauges installed at the time of delivery
Gauge size
Needle-feed gauges
Throat plate
Standard type
For tape attachment
Standard type
For tape attachment
Standard type
For tape attachment
Presser foot Feed dog
(small pitch)Code
mm
inch
Gauge size
Code
mm
inch
Gauge size
Code
mm
inch
Throat plate Presser foot Feed dog
Throat plate
Feed dog (small pitch) Feed dog (large pitch)
Presser foot
Feed dog (small pitch) Feed dog (large pitch)
Bottom-feed gauges Common gauges for
needle-feed and bottom-feed
Slide plate (front)
■Optional gauges
Feed dog
(large pitch) Rectangular feed For light-weight materials
B
D
F
G
H
3.2
4.8
6.4
7.1
7.9
1/8
3/16
1/4
9/32
5/16
101-47650
101-47858
101-48054
101-48153
101-48252
226-25107
226-25305
226-25503
226-25602
226-25701
232-06808
B1109-512-D0B
B1109-512-F0B
B1109-512-G0B
B1109-512-H0B
226-27152
226-27350
226-27558
226-27657
226-27756
226-47051
226-47150
226-47358
226-47457
226-47556
B1613-512-B0B
B1613-512-D0B
B1613-512-F0B
B1613-512-G0B
B1613-512-H0B
B
D
F
3.2
4.8
6.4
1/8
3/16
1/4
228-45200
228-45408
228-45606
103-91852
103-92058
103-92256
232-05107
232-05305
232-05503 B1110-051-0A0 232-06709
B
D
F
G
H
3.2
4.8
6.4
7.1
7.9
1/8
3/16
1/4
9/32
5/16
Gauge size
Code
mm
inch
B
D
F
G
H
3.2
4.8
6.4
7.1
7.9
1/8
3/16
1/4
9/32
5/16
101-08108
101-08207 B1109-528-B00
B1106-528-D00
B1109-528-G00
101-86302
101-86401
101-86500
101-40804
101-40903 22637656
22637854
22638050
22638258
22638357
226-35107
226-35304
226-35502
226-35700
226-35809
226-34000
226-34208
226-34406
226-34505
226-34604
Bed with flat top surface
With behind-the-
needle-slot grooves With behind-the-
needle-slot grooves With behind-the-
needle-slot grooves Without behind-the-
needle-slot grooves Without behind-the-
needle-slot grooves
For tape attachment
Slide plate (front)
226-08558
All-thin type
Needle slot
φ2.0 (B gauge)
φ2.2 (D and F gauges)
With swivel guide With behind-the-
needle-slot grooves
Needle clamp
Needle-feed gauges
With tape inserting
recess
Throat plate
For tape attachment
226-28002
226-28200
226-28408
226-28507
226-28606
Needle-feed gauges Common gauges for
needle-feed and
bottom-feed
INTERNATIONAL SALES H.Q.
✽
Specifications and appearance are subject to change without prior notice for improvement.
✽
Read the instruction manual before putting the machine into service to ensure safety.
✽
This catalog is printed on recycle paper.
FEBRUARY, 2004 Printed in Japan(AD)
8-2-1
, KOKURYO-CHO, CHOFU-SHI,
TOKYO
182-8655
, JAPAN
PHONE :
(81)3-3480-2357, 2358
FAX :
(81)3-3430-4909, 4914
http://www.juki.com
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considered,
➁the conservation of the energy and resources, and the recycling,
in the research, development, design, distribution, sale and
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household sewing machines and industrial-use robots, etc.and
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commodities including the healthcare products.
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