JUKI LBH-1790 Series User manual
Specifications
Sewing speed Max. 4,200sti/min, Normal 3,600sti/min
When the non-lubricated hook (optional) is used: 3,300sti/min
Needle bar stroke 34.6mm
Size of cloth cutting knife 6.4〜31.8mm (1/4"〜1-1/4")
Bartacking width Max. 5.0mm (with special-specification part: Max. 10mm*)
Buttonhole length Max. 41mm (optional: 70mm, 120mm) , LBH1795:120mm
Precision of needle throwing mechanism 0.05mm
Needle thread tension Active tension (electronic thread tension control system)
Number of stitches Automatically computed from the size of the buttonhole and stitch pitch
Needle (at the time of delivery) DP×5 (#11J) #11J〜#14J
Hook DP type, full-rotary hook
Non-lubricated hook (optional)
Lift of the work clamp 14mm (17mm when the reverse-rotation needle-up function is used)
Auto-lifter Provided as standard (stepping motor type)
Needle throwing system Stepping motor
Cloth feeding system Intermittent feed by stepping motor
Cloth cutting knife system By double-acting solenoid
Number of standard patterns 30 patterns
Number of patterns that can be input Max. 99 patterns
Bobbin thread winder Built-in the machine head
Machine head drive system Compact AC servomotor (direct-drive system)
Power requirement/ Power consumption Single-phase 220V, 230V, 240V・3-phase 200〜240V/600VA
Lubrication Only the hook section needs a minute-quantity lubrication.
＊ No lubrication is required when the non-lubricated hook (optional) is used.
Lubricating oil Hook: JUKI New Defrix Oil No.1 (equivalent to ISO VG7)
Total weight 112kg
✽sti/minstands forStitches per Minute
✽The special-specification part is available on a special order. Contact our branch or office in your area.
★CompactFlashor CFA specification compatible media.
★“CompactFlash” is a registered trademark of SanDisk Corporation, U.S.A.
★Other company names and product names/brand names are trademarks or registered trademarks of the respective companies.
The thread tension and main drive mechanisms are electronically controlled.
Computer-controlled, High-speed, Lockstitch Buttonholing Machine
LBH-1790 Series
LBH-1790S (Table stand is optionally available.)
LBH-1790S (Table stand is optionally available.)
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LBH179 S
LBH-1790S (Table stand is optionally available.)
●It is able to store 99 different patterns in its memory, which can be selected as desired from the operation panel.
●All kinds of data can be entered on or selected
from the operation panel.
●Various data, such as pattern numbers and
stitch shapes are indicated on the LCD section
with easy-to-understand pictographs.
[Machine head]
[Control box]
Please note when placing orders, that the model name should be written as follows:
●To order, please contact your nearest JUKI distributor.
MC601
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Power supply Code
3-phase 200〜240V E
200〜240V K
Single-phase CE 230V N
(not provided with power switch)
Type Code
Standard S
LBH1792K
Type Code
For Knit K
Operation panel Code
Standard SS
q
Square
u
Eyelet square
!3
Semilunar
square
!9
Square
semilunar
@0
Square round
@1
Square straight
bartacking
@2
Square taper
bartacking
@3
Radial
semilunar
@4
Radial round
@5
Semilunar
radial
@6
Semilunar
round
@7
Bartacking
@8
Bartacking,
right cut
@9
Bartacking,
left cut
#0
Bartacking,
center cut
!4
Semilunar straight
bartacking
!5
Semilunar taper
bartacking
!6
Eyelet
semilunar
!7
Eyelet round
!8
Square radial
i
Eyelet radial
o
Eyelet straight
bartacking
!0
Eyelet taper
bartacking
!1
Semilunar
!2
Round square
w
Round
e
Radial square
r
Radial
t
Radial straight
bartacking
y
Radial taper
bartacking
STANDARD PANEL IP-420A
●The IP-420 touch panel offers market-proven ease of operation. It is provided
with a wide screen and programmable functions.
●Data can be input/edited while visually checking the needle movement.
● The color LCD unit displays sewing data such as stitch shape, needle thread ten-
sion, enlargement/reduction ratio, sewing speed and the number of stitches at a
glance.
●The memory storage capability of the main body of the sewing machine has
been dramatically enhanced. Now the
USB-ready main body of the sewing
machine uses many different kinds of
media. In addition to the
CompactFlash card, the main body of
the sewing machine is provided as
standard with a USB connector. Now,
data can be input/output to/from
various kinds of media (FD (floppy
disks), SM (SmartMedia), CF
(CompactFlash), SD (Secure Digital
Card) etc.) by means of a USB thumb
device and a card reader.
LBH-1790
The machine offers increased flexibility.
It achieves the highest productivity and seam quality.
The machine offers increased flexibility.
It achieves the highest productivity and seam quality.
The machine offers increased flexibility.
It achieves the highest productivity and seam quality.
The machine offers increased flexibility.
It achieves the highest productivity and seam quality.
USB card reader
*IP-420A shouold be ordered as a part. [IP-420A:40105585
2
0
5
6.4〜31.8mm 5mm×35mm
5mm×120mm
Work clamp type
Code
Knife width
Model
Work clamp type
Code
Knife width
Model
6.4〜25.4mm 5mm×35mm
●
Cloth cutting knife, Work clamp
●
Throat plate
Designation Part No. Description Feature
Non-lubricated hook
400-06345 RP hook (asm.)
400-06349 RP bobbin case
137-29660 Hook sleeve (asm.)
SS-8660612-TP (4 pcs.) Screws
400-06340 Work clamp arm spacer
SM-6040450-TP (3 pcs.) Screws
145-23252 Work clamp foot 70 (asm.)
145-23401 Work clamp 70
145-23708 Urethane work clamp 70 Selectable
145-24102 Flat work clamp 70
Work clamp 400-08646 Work clamp foot 120 (asm.)
(For sewing length of 70 mm, 120mm)
400-08658 Work clamp 120
400-06335 Work clamp arm 120
400-06339 Cloth feeding plate 120
400-06341 Close cam 120
400-06342 Lifting plate 120
SM-6050800-SP (2 pcs.) Screws
SS-6060210-SP (2 pcs.) Screws
Electric bobbin winder
G5001-198-0A0-A Electric bobbin winder (asm.)
400-05405 Power cord (asm.)
400-53150 Tension controller (asm.)
SK-3452001-SE Wood screws
2-pedal unit for standing work GPK-510010B0 Pedal switch (asm.) −
400-03493 Junction cable (asm.)
Options
◎Factory installed on machine △Supplied as an accessory (For LBH-1790S)
◎Factory installed on machine
Bed the left side width of
which has been reduced
Longer distance from machine arm to needle
Solenoid
Auxiliary table (standard accessory)
Bed the left side width of
which has been reduced
Longer distance from machine arm to needle Auxiliary table (standard accessory)
Needle thread tensioner
Solenoid Needle thread tensioner
A
B
A
B
By the installation of non-lubricated hook, the
machine is changed to be a fully dry-head
machine. (In this case, the maximum sewing
speed will be 3,300rpm.)
The work clamp is
applicable to the
sewing length of 70mm
or 120mm. With this
work clamp, holing of
belt holes in child seat
is possible.
It is a device for winding bobbin separately.
Exclusive to 70mm
Exclusive to 120mm
Common to 70 mm
and 120 mm
●The hollowed type frame promises efficient sewing of vertical buttonholes.
The machine can be operated with its head positioned horizontally.
●The distance from the machine arm to the needle has been lengthened and
the left side section of the needle entry has been reduced by a large margin.
This helps in the smooth placement of the sewing product on the machine,
thereby ensuring improved workability.
●The sewing product can further be placed on the machine
easily by installing the auxiliary table (standard accessory).
In addition, the needle entry is located in the center of the
bed, promising easier positioning of the sewing product.
●Thanks to our advanced dry-head technology,
no lubrication is required except for the hook
section. This eliminates oil stains on the
sewing product.
●The machine can be completely changed into
a dry-head machine by replacing the hook
with an optional non-lubricated hook.
(In this case, the maximum sewing speed will
be 3,300rpm.)
●Only a minute-quantity of clean oil is fed to the
hook section from the oil tank.
●Needle thread tension for sewing parallel and bartacking
sections of buttonholes can be separately controlled
through the operation panel and stored in memory
according to various sewing conditions (e.g., type of
thread, type of material and sewing speed).
●The machine is able to change the needle thread tensions
at the parallel and bartacking sections of the buttonhole,
to produce a beautiful buttonhole shape. This capability
helps greatly in preventing thread breakage.
●Needle thread tension is activated at the beginning and
end of sewing. This prevents unthreading of the needle
thread, and thread fraying that is likely to occur at the
beginning of sewing.
●Thread tension for basting stitching can be specified
separately.
Oil tank
Hook
Oil tank
Hook
Hook section
(minute-quantity
lubrication)
Non-lubricated
section
Hook section
(minute-quantity
lubrication)
Non-lubricated
section
The machine eliminates oil stains on the sewing product.
JUKI's uni ue active tension (Electronic thread tension control system).
Frame shape offers improved operability.
Mark
6.4mm (1/4")
9.5mm (3/8")
11.1mm (7/16")
12.7mm (1/2")
14.3mm (9/16")
15.9mm (5/8")
17.5mm (11/16")
19.1mm (3/4")
22.2mm (7/8")
25.4mm (1")
31.8mm (1-1/4")
B2702-047-F00
B2702-047-K00-A
B2702-047-I00
B2702-047-L00-A
B2702-047-V00
B2702-047-M00-A
B2702-047-A00
B2702-047-N00
B2702-047-P00
B2702-047-Q00-A
B2702-047-S00-A
F
K
I
L
V
M
A
N
P
Q
S
△
◎
△
△
◎
△
◎
◎
△
◎ ◎
◎
Mark
Part No.
Knife size
Cloth cutting knife Work clamp
For stitch width 5mm
For stitch width 6mm
LBH-1790S (standard) LBH-1792K (for knits) LBH-1790S (standard)LBH-1795S (standard)
Part No.
(Length of cloth cutting knife)
<Type>（A×B）
Part No.
(Length of cloth
cutting knife)
<Type>（A×B）
Part No.
(Length of cloth
cutting knife)
（A×B）
Part No.<Type> Part No.
1790
S
1792
K
1795
S
D1508-773K00
(6.4〜31.8mm)
<3> (5×41mm)
D1508-772-K00
(6.4〜25.4mm)
<2> (5×35mm)
D1508-771-KA0-A
(6.4〜19.1mm)
<1> (4×25mm)
B1552-783-000
(6.4〜31.8mm)
<3> (5×41mm)
B1552-782-000
(6.4〜25.4mm)
<2> (5×35mm)
B1552-781-000-A
(6.4〜19.1mm)
<1> (4×25mm)
40008658
(5×120mm)
40008646
145-24409
(6.4〜31.8mm)
<3> (6×41mm)
D1511-773-KA0
<3>
SS-6060210-SP
(2 pcs.)
D1511-772-KA0
<2>
D1511-771-KA0-A
<1>
Work clamp foot
400-04352 (1.2×6.2mm)
400-04353 (1.2×7.4mm) ◎
◎
5mm
6mm
400-04350 (S5: 1.4×6.2mm)
400-04351 (S6: 1.4×7.4mm)
For needle throwing width
Standard (S) For Knits (K)
Part No. (Marking: A×B)
Purl stitching ←→ Whip stitching Single stitching ←→ Double stitching
●The basting stitch is effective on elastic materials such as knits.
Basting stitch: Since the needle thread is tucked in without fail,
it will never jut out of the buttonhole seams.
Basting stitch can be sewn by nine rounds.
●
(The state in which the material is stretched in
the lengthwise direction after buttonholing)
①Maximum position
Cloth
②Intermediate position
③Sewing position
(For a changeover between purl stitch
and whip stitch, threading of bobbin,
as well as the bobbin thread tension
need to be changed.)
•For double stitching, the bartacking
section is skipped and only the parallel
sections are sewn twice. This prevents
any excessively tight finishes in the
bartacking section of the buttonhole.
•First- and second-round stitches can be
sewn using different stitch widths.
17mm17mm
Compact AC servomotor
(direct-drive) Stepping motor
for the presser bar lifter Stepping motor for the bobbin thread trimmer
Stepping motor for the cloth feed
Stepping motor for the bobbin thread trimmer
Stepping motor for the cloth feed
Stepping motor
for the needle throw
Stepping motor
for the needle thread trimmer
Double acting solenoid
for the cloth cutting knife
Compact AC servomotor
(direct-drive) Stepping motor
for the presser bar lifter
Stepping motor
for the needle throw
Stepping motor
for the needle thread trimmer
Double acting solenoid
for the cloth cutting knife
●Thanks to the multiple knife-dropping function, it is no longer required
that the knife be changed at the time the buttonhole size is changed.
The number of knife dropping times can be automatically set according
to the buttonholing size in cases where the buttonhole size is frequently
changed for small-lot productions or during the cycle sewing of
buttonholes that are different in size.
●The double-acting solenoid type knife mechanism is free from the faulty
dropping/returning of the knife. In addition, the knife pressure can be
changed according to the material to be sewn.
●The knife supports sewing lengths of 41mm at the maximum. In addition,
knife mechanisms for 70mm and 120mm are optionally available.
Since the LBH-1795 is provided as standard with the 120 mm presser, it
is capable of sewing 12-mm long buttonholes. The LBH-1795 is capable
of sewing long buttonholes such as belt holes in car seats. In addition, it
is applicable to the sewing of buttonholes in men's shirts (continuous
sewing of two buttonholes and the use of two units of sewing machines),
etc.
●The new model of the bobbin thread trimming
mechanism cuts the bobbin thread so that it leaves
a shorter length of thread on the material.
Furthermore, the machine produces bartacks at the
end of sewing, thereby preventing finished seams
from coming undone.
●With the soft-start function, the number of stitches,
as well as the sewing speed at the start of sewing
can be specified, thereby preventing the needle
thread from slipping off from the needle eyelet.
(From the first to the fifth stitches, the sewing speed
can be specified on a stitch-by-stitch basis.)
!
●An electronic control feature has been adopted for the material feed
mechanism, needle rocking mechanism, needle thread trimming mechanism,
bobbin thread trimming mechanism, cloth cutting knife mechanism and presser
bar lifting mechanism. In addition, mechanisms such as V-belts, stop-motion
mechanisms and cams have been substantially reduced to ensure operation
with lower vibration and noise.
●A direct-driven system that directly connects the
compact AC servomotor to the main shaft has been
adopted.
●All adjustment values are entered as data. They can be
set or stored in the memory on the operation panel.
"
●The machine is provided as standard with a newly-developed auto-lifter driven
by a stepping motor. This helps reduce the operator's fatigue. This helps reduce
operator fatigue. As for the pedal, one-pedal and two-pedal models can both be
changed over and the intermediate stop, which facilitates positioning of the
sewing product, can be specified.
●The work clamp foot lift can be set as desired.
The reverse-rotation needle-up function offers
a maximum work clamp foot lift of 17mm.
!
Cycle sewing
●Twenty different programs can be registered, and as many
as 15 different patterns can be stored in one program.
Continuous sewing
●The machine is able to continuously sew two or more
different patterns without requiring the work clamp foot to
be lifted. As may as 20 programs can be registered, and
six different patterns can be stored in one program.
(Related parts need to be exchanged for optional ones.)
#!
●The needle bar can be shifted to the rightmost end
position with the work clamp foot lowered.
This facilitates threading of the machine head.
!
!
Pedal motion
Pedal type
2-pedal 1-pedal 1-pedal
(without intermediate position) (with intermediate position)
Initial position
Setting of sewing product
Start of sewing
End of sewing
Finished state of
double stitching
State of first-
round stitch
Whip stitchingPurl stitching
Without basting stitch With basting stitch Basting stitch
Position of the needle bar
during sewing
The needle bar can be shifted to
the right at the time of threading
②Intermediate position
Presser goes up as high as the pedal
toe down amount of the left side pedal.
Presser comes down when the left
side pedal is depressed.
→③Sewing position
The right side pedal is depressed.
②Presser automatically goes up to
intermediate position.
①Maximum position
The first step of the right side pedal
→③Sewing position
The second step of the right side pedal
①Presser automatically goes up to
maximum position.
①Maximum position
The first step of the right side pedal
→②Intermediate position
↓
The second step of the right side pedal
→③Sewing position
The third step of the right side pedal
①Presser automatically goes up to
maximum position.
120mm buttonhole
LBH-1795S
Purl stitching ←→ Whip stitching Single stitching ←→ Double stitching
●The basting stitch is effective on elastic materials such as knits.
Basting stitch: Since the needle thread is tucked in without fail,
it will never jut out of the buttonhole seams.
Basting stitch can be sewn by nine rounds.
●
(The state in which the material is stretched in
the lengthwise direction after buttonholing)
①Maximum position
Cloth
②Intermediate position
③Sewing position
(For a changeover between purl stitch
and whip stitch, threading of bobbin,
as well as the bobbin thread tension
need to be changed.)
•For double stitching, the bartacking
section is skipped and only the parallel
sections are sewn twice. This prevents
any excessively tight finishes in the
bartacking section of the buttonhole.
•First- and second-round stitches can be
sewn using different stitch widths.
17mm17mm
Compact AC servomotor
(direct-drive) Stepping motor
for the presser bar lifter Stepping motor for the bobbin thread trimmer
Stepping motor for the cloth feed
Stepping motor for the bobbin thread trimmer
Stepping motor for the cloth feed
Stepping motor
for the needle throw
Stepping motor
for the needle thread trimmer
Double acting solenoid
for the cloth cutting knife
Compact AC servomotor
(direct-drive) Stepping motor
for the presser bar lifter
Stepping motor
for the needle throw
Stepping motor
for the needle thread trimmer
Double acting solenoid
for the cloth cutting knife
●Thanks to the multiple knife-dropping function, it is no longer required
that the knife be changed at the time the buttonhole size is changed.
The number of knife dropping times can be automatically set according
to the buttonholing size in cases where the buttonhole size is frequently
changed for small-lot productions or during the cycle sewing of
buttonholes that are different in size.
●The double-acting solenoid type knife mechanism is free from the faulty
dropping/returning of the knife. In addition, the knife pressure can be
changed according to the material to be sewn.
●The knife supports sewing lengths of 41mm at the maximum. In addition,
knife mechanisms for 70mm and 120mm are optionally available.
Since the LBH-1795 is provided as standard with the 120 mm presser, it
is capable of sewing 12-mm long buttonholes. The LBH-1795 is capable
of sewing long buttonholes such as belt holes in car seats. In addition, it
is applicable to the sewing of buttonholes in men's shirts (continuous
sewing of two buttonholes and the use of two units of sewing machines),
etc.
●The new model of the bobbin thread trimming
mechanism cuts the bobbin thread so that it leaves
a shorter length of thread on the material.
Furthermore, the machine produces bartacks at the
end of sewing, thereby preventing finished seams
from coming undone.
●With the soft-start function, the number of stitches,
as well as the sewing speed at the start of sewing
can be specified, thereby preventing the needle
thread from slipping off from the needle eyelet.
(From the first to the fifth stitches, the sewing speed
can be specified on a stitch-by-stitch basis.)
!
●An electronic control feature has been adopted for the material feed
mechanism, needle rocking mechanism, needle thread trimming mechanism,
bobbin thread trimming mechanism, cloth cutting knife mechanism and presser
bar lifting mechanism. In addition, mechanisms such as V-belts, stop-motion
mechanisms and cams have been substantially reduced to ensure operation
with lower vibration and noise.
●A direct-driven system that directly connects the
compact AC servomotor to the main shaft has been
adopted.
●All adjustment values are entered as data. They can be
set or stored in the memory on the operation panel.
"
●The machine is provided as standard with a newly-developed auto-lifter driven
by a stepping motor. This helps reduce the operator's fatigue. This helps reduce
operator fatigue. As for the pedal, one-pedal and two-pedal models can both be
changed over and the intermediate stop, which facilitates positioning of the
sewing product, can be specified.
●The work clamp foot lift can be set as desired.
The reverse-rotation needle-up function offers
a maximum work clamp foot lift of 17mm.
!
Cycle sewing
●Twenty different programs can be registered, and as many
as 15 different patterns can be stored in one program.
Continuous sewing
●The machine is able to continuously sew two or more
different patterns without requiring the work clamp foot to
be lifted. As may as 20 programs can be registered, and
six different patterns can be stored in one program.
(Related parts need to be exchanged for optional ones.)
#!
●The needle bar can be shifted to the rightmost end
position with the work clamp foot lowered.
This facilitates threading of the machine head.
!
!
Pedal motion
Pedal type
2-pedal 1-pedal 1-pedal
(without intermediate position) (with intermediate position)
Initial position
Setting of sewing product
Start of sewing
End of sewing
Finished state of
double stitching
State of first-
round stitch
Whip stitchingPurl stitching
Without basting stitch With basting stitch Basting stitch
Position of the needle bar
during sewing
The needle bar can be shifted to
the right at the time of threading
②Intermediate position
Presser goes up as high as the pedal
toe down amount of the left side pedal.
Presser comes down when the left
side pedal is depressed.
→③Sewing position
The right side pedal is depressed.
②Presser automatically goes up to
intermediate position.
①Maximum position
The first step of the right side pedal
→③Sewing position
The second step of the right side pedal
①Presser automatically goes up to
maximum position.
①Maximum position
The first step of the right side pedal
→②Intermediate position
↓
The second step of the right side pedal
→③Sewing position
The third step of the right side pedal
①Presser automatically goes up to
maximum position.
120mm buttonhole
LBH-1795S
●
Cloth cutting knife, Work clamp
●
Throat plate
Designation Part No. Description Feature
Non-lubricated hook
400-06345 RP hook (asm.)
400-06349 RP bobbin case
137-29660 Hook sleeve (asm.)
SS-8660612-TP (4 pcs.) Screws
400-06340 Work clamp arm spacer
SM-6040450-TP (3 pcs.) Screws
145-23252 Work clamp foot 70 (asm.)
145-23401 Work clamp 70
145-23708 Urethane work clamp 70 Selectable
145-24102 Flat work clamp 70
Work clamp 400-08646 Work clamp foot 120 (asm.)
(For sewing length of 70 mm, 120mm)
400-08658 Work clamp 120
400-06335 Work clamp arm 120
400-06339 Cloth feeding plate 120
400-06341 Close cam 120
400-06342 Lifting plate 120
SM-6050800-SP (2 pcs.) Screws
SS-6060210-SP (2 pcs.) Screws
Electric bobbin winder
G5001-198-0A0-A Electric bobbin winder (asm.)
400-05405 Power cord (asm.)
400-53150 Tension controller (asm.)
SK-3452001-SE Wood screws
2-pedal unit for standing work GPK-510010B0 Pedal switch (asm.) −
400-03493 Junction cable (asm.)
Options
◎Factory installed on machine △Supplied as an accessory (For LBH-1790S)
◎Factory installed on machine
Bed the left side width of
which has been reduced
Longer distance from machine arm to needle
Solenoid
Auxiliary table (standard accessory)
Bed the left side width of
which has been reduced
Longer distance from machine arm to needle Auxiliary table (standard accessory)
Needle thread tensioner
Solenoid Needle thread tensioner
A
B
A
B
By the installation of non-lubricated hook, the
machine is changed to be a fully dry-head
machine. (In this case, the maximum sewing
speed will be 3,300rpm.)
The work clamp is
applicable to the
sewing length of 70mm
or 120mm. With this
work clamp, holing of
belt holes in child seat
is possible.
It is a device for winding bobbin separately.
Exclusive to 70mm
Exclusive to 120mm
Common to 70 mm
and 120 mm
●The hollowed type frame promises efficient sewing of vertical buttonholes.
The machine can be operated with its head positioned horizontally.
●The distance from the machine arm to the needle has been lengthened and
the left side section of the needle entry has been reduced by a large margin.
This helps in the smooth placement of the sewing product on the machine,
thereby ensuring improved workability.
●The sewing product can further be placed on the machine
easily by installing the auxiliary table (standard accessory).
In addition, the needle entry is located in the center of the
bed, promising easier positioning of the sewing product.
●Thanks to our advanced dry-head technology,
no lubrication is required except for the hook
section. This eliminates oil stains on the
sewing product.
●The machine can be completely changed into
a dry-head machine by replacing the hook
with an optional non-lubricated hook.
(In this case, the maximum sewing speed will
be 3,300rpm.)
●Only a minute-quantity of clean oil is fed to the
hook section from the oil tank.
●Needle thread tension for sewing parallel and bartacking
sections of buttonholes can be separately controlled
through the operation panel and stored in memory
according to various sewing conditions (e.g., type of
thread, type of material and sewing speed).
●The machine is able to change the needle thread tensions
at the parallel and bartacking sections of the buttonhole,
to produce a beautiful buttonhole shape. This capability
helps greatly in preventing thread breakage.
●Needle thread tension is activated at the beginning and
end of sewing. This prevents unthreading of the needle
thread, and thread fraying that is likely to occur at the
beginning of sewing.
●Thread tension for basting stitching can be specified
separately.
Oil tank
Hook
Oil tank
Hook
Hook section
(minute-quantity
lubrication)
Non-lubricated
section
Hook section
(minute-quantity
lubrication)
Non-lubricated
section
The machine eliminates oil stains on the sewing product.
JUKI's uni ue active tension (Electronic thread tension control system).
Frame shape offers improved operability.
Mark
6.4mm (1/4")
9.5mm (3/8")
11.1mm (7/16")
12.7mm (1/2")
14.3mm (9/16")
15.9mm (5/8")
17.5mm (11/16")
19.1mm (3/4")
22.2mm (7/8")
25.4mm (1")
31.8mm (1-1/4")
B2702-047-F00
B2702-047-K00-A
B2702-047-I00
B2702-047-L00-A
B2702-047-V00
B2702-047-M00-A
B2702-047-A00
B2702-047-N00
B2702-047-P00
B2702-047-Q00-A
B2702-047-S00-A
F
K
I
L
V
M
A
N
P
Q
S
△
◎
△
△
◎
△
◎
◎
△
◎ ◎
◎
Mark
Part No.
Knife size
Cloth cutting knife Work clamp
For stitch width 5mm
For stitch width 6mm
LBH-1790S (standard) LBH-1792K (for knits) LBH-1790S (standard)LBH-1795S (standard)
Part No.
(Length of cloth cutting knife)
<Type>（A×B）
Part No.
(Length of cloth
cutting knife)
<Type>（A×B）
Part No.
(Length of cloth
cutting knife)
（A×B）
Part No.<Type> Part No.
1790
S
1792
K
1795
S
D1508-773K00
(6.4〜31.8mm)
<3> (5×41mm)
D1508-772-K00
(6.4〜25.4mm)
<2> (5×35mm)
D1508-771-KA0-A
(6.4〜19.1mm)
<1> (4×25mm)
B1552-783-000
(6.4〜31.8mm)
<3> (5×41mm)
B1552-782-000
(6.4〜25.4mm)
<2> (5×35mm)
B1552-781-000-A
(6.4〜19.1mm)
<1> (4×25mm)
40008658
(5×120mm)
40008646
145-24409
(6.4〜31.8mm)
<3> (6×41mm)
D1511-773-KA0
<3>
SS-6060210-SP
(2 pcs.)
D1511-772-KA0
<2>
D1511-771-KA0-A
<1>
Work clamp foot
400-04352 (1.2×6.2mm)
400-04353 (1.2×7.4mm) ◎
◎
5mm
6mm
400-04350 (S5: 1.4×6.2mm)
400-04351 (S6: 1.4×7.4mm)
For needle throwing width
Standard (S) For Knits (K)
Part No. (Marking: A×B)
LBH179 S
LBH-1790S (Table stand is optionally available.)
●It is able to store 99 different patterns in its memory, which can be selected as desired from the operation panel.
●All kinds of data can be entered on or selected
from the operation panel.
●Various data, such as pattern numbers and
stitch shapes are indicated on the LCD section
with easy-to-understand pictographs.
[Machine head]
[Control box]
Please note when placing orders, that the model name should be written as follows:
●To order, please contact your nearest JUKI distributor.
MC601
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Power supply Code
3-phase 200〜240V E
200〜240V K
Single-phase CE 230V N
(not provided with power switch)
Type Code
Standard S
LBH1792K
Type Code
For Knit K
Operation panel Code
Standard SS
q
Square
u
Eyelet square
!3
Semilunar
square
!9
Square
semilunar
@0
Square round
@1
Square straight
bartacking
@2
Square taper
bartacking
@3
Radial
semilunar
@4
Radial round
@5
Semilunar
radial
@6
Semilunar
round
@7
Bartacking
@8
Bartacking,
right cut
@9
Bartacking,
left cut
#0
Bartacking,
center cut
!4
Semilunar straight
bartacking
!5
Semilunar taper
bartacking
!6
Eyelet
semilunar
!7
Eyelet round
!8
Square radial
i
Eyelet radial
o
Eyelet straight
bartacking
!0
Eyelet taper
bartacking
!1
Semilunar
!2
Round square
w
Round
e
Radial square
r
Radial
t
Radial straight
bartacking
y
Radial taper
bartacking
STANDARD PANEL IP-420A
●The IP-420 touch panel offers market-proven ease of operation. It is provided
with a wide screen and programmable functions.
●Data can be input/edited while visually checking the needle movement.
● The color LCD unit displays sewing data such as stitch shape, needle thread ten-
sion, enlargement/reduction ratio, sewing speed and the number of stitches at a
glance.
●The memory storage capability of the main body of the sewing machine has
been dramatically enhanced. Now the
USB-ready main body of the sewing
machine uses many different kinds of
media. In addition to the
CompactFlash card, the main body of
the sewing machine is provided as
standard with a USB connector. Now,
data can be input/output to/from
various kinds of media (FD (floppy
disks), SM (SmartMedia), CF
(CompactFlash), SD (Secure Digital
Card) etc.) by means of a USB thumb
device and a card reader.
LBH-1790
The machine offers increased flexibility.
It achieves the highest productivity and seam quality.
The machine offers increased flexibility.
It achieves the highest productivity and seam quality.
The machine offers increased flexibility.
It achieves the highest productivity and seam quality.
The machine offers increased flexibility.
It achieves the highest productivity and seam quality.
USB card reader
*IP-420A shouold be ordered as a part. [IP-420A:40105585
2
0
5
6.4〜31.8mm 5mm×35mm
5mm×120mm
Work clamp type
Code
Knife width
Model
Work clamp type
Code
Knife width
Model
6.4〜25.4mm 5mm×35mm
Specifications
Sewing speed Max. 4,200sti/min, Normal 3,600sti/min
When the non-lubricated hook (optional) is used: 3,300sti/min
Needle bar stroke 34.6mm
Size of cloth cutting knife 6.4〜31.8mm (1/4"〜1-1/4")
Bartacking width Max. 5.0mm (with special-specification part: Max. 10mm*)
Buttonhole length Max. 41mm (optional: 70mm, 120mm) , LBH1795:120mm
Precision of needle throwing mechanism 0.05mm
Needle thread tension Active tension (electronic thread tension control system)
Number of stitches Automatically computed from the size of the buttonhole and stitch pitch
Needle (at the time of delivery) DP×5 (#11J) #11J〜#14J
Hook DP type, full-rotary hook
Non-lubricated hook (optional)
Lift of the work clamp 14mm (17mm when the reverse-rotation needle-up function is used)
Auto-lifter Provided as standard (stepping motor type)
Needle throwing system Stepping motor
Cloth feeding system Intermittent feed by stepping motor
Cloth cutting knife system By double-acting solenoid
Number of standard patterns 30 patterns
Number of patterns that can be input Max. 99 patterns
Bobbin thread winder Built-in the machine head
Machine head drive system Compact AC servomotor (direct-drive system)
Power requirement/ Power consumption Single-phase 220V, 230V, 240V・3-phase 200〜240V/600VA
Lubrication Only the hook section needs a minute-quantity lubrication.
＊ No lubrication is required when the non-lubricated hook (optional) is used.
Lubricating oil Hook: JUKI New Defrix Oil No.1 (equivalent to ISO VG7)
Total weight 112kg
✽sti/minstands forStitches per Minute
✽The special-specification part is available on a special order. Contact our branch or office in your area.
★CompactFlashor CFA specification compatible media.
★“CompactFlash” is a registered trademark of SanDisk Corporation, U.S.A.
★Other company names and product names/brand names are trademarks or registered trademarks of the respective companies.
The thread tension and main drive mechanisms are electronically controlled.
Computer-controlled, High-speed, Lockstitch Buttonholing Machine
LBH-1790 Series
LBH-1790S (Table stand is optionally available.)
LBH-1790S (Table stand is optionally available.)
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5
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