SPECIFICATIONS

LH-4500C Series
Model name LH-4578CFF LH-4578CFS LH-4578CFS-7 LH-4588CFS-7 LH-4578CFG-7 LH-4588CFG-7
Specification Full digital
Application Foundation Medium-weight Jeans and heavy-weight materials
Semi-dry head, 2-needle Lockstitch Sewing System
Corner stitching
(Organized split needle bar mechanism)
Not provided provided Not provided provided

Lubricating system Semi-dry / Hook section: Minute-quantity lubrication ( tank system)

Feed system Needle feed
Max. sewing speed 3,000sti/min*
Max. stitch length 4mm 5mm 7mm
Thread take-up lever Slide type
Needle bar stroke
Needle thread tension
33.4mm
Independent right and left active tension mechanism
Inspire the Knowledge in Sewing Adjustment
Epoch-making Sewing Systems in history
Active presser foot Standard
Lift of the presser foot (max.) 13mm
Multilayered portion detection Option Standard
Knee lifter Option
Reverse feed stitching lever Not provided Standard
Needle DP× 5 #10 (#9~ #16) DP × 5 #14 (#9 ~ #16) DP × 5 #21 (#16 ~ #23 )
#30 - #3 (for #8 - #3,
Thread used #80 - #30
bobbin thread count should be #20 )
Hook Vertical-axis large hook (1.8 - fold )
Free space under the arm 120 mm (height ) x 266 mm (distance from machine arm to needle ) x 87 mm (height of the jaw section )
Lubricating oil JUKI New Defri x Oil No.1 (Equivalent to ISO VG7)
* sti/min is the abbreviation for "stitches per minute"

LH-4578CFS-7
Registered Organization:
Head Office
The Scope of the Registration: The activities
of research, development, design, sales,
distribution, and maintenance services of
industrial sewing machines, household
sewing machines and industrial robots, etc.,
including sales and maintenance services of
data entry systems.

2-11-1, TSURUMAKI, TAMA-SHI,

TOKYO 206-8551, JAPAN
PHONE: ( 81) 42-357-2370
FAX: ( 81) 42-357-2274 Semi-dry head, 2-needle Lockstitch Sewing System

LH-4500C Series
SEWING MACHINERY & SYSTEMS BUSINESS UNIT https://www.juki.co.jp/en
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 catalogue prints with environment-friendly soyink on recycle paper.
Paper from responsible sources FSC™ C001712 FEBRUARY, 2021 Printed in Japan(TN)
Digital sewing system proposes the production process added with
a computerized new value to all the people who engage in production. Multilayered portion detection device ( S/G type: Standard equipment, F type: Option)

The sewing machine is provided as standard with the multilayered portion detection device.
Semi-dry head, 2-needle Lockstitch Sewing System This device contributes to the realization of stable pitch / well-tensed seam when sewing the multilayered portion.

LH-4500C Series
Since the sewing correction can be respectively set the multilayered portion run-on portion and for the top of
multilayered portion, stitch gathering at the multilayered portion can be improved.

Corner stitching capability has been improved ( only for the LH-4588C)

Changeover from the normal stitching to the corner stitching is carried out semi-automatically
using the lever while ensuring ease of operation. The operator only needs to input data on the
needle gauge/stitching angle through the operation panel. Then, the operator can start the corner
stitching only by operating the lever during sewing. Thereafter, the sewing machine automatically
changes the sewing mode between the normal stitching and the corner stitching. This means that even the inexperi-
enced operator can produce consistent seam quality while improving productivity. In addition, the problem that the seam
inside the corner stitching floats*1 can be solved by the active - tension correction function*2.

*1 Seams where the inside of the corner stitching has floated *2 Active tension setting screen

Model name(Top): LH-4578CFS-7 / (Bottom): LH-4588CFG-7

Reduction of setup changing time

上段：LH-4578CFS-7、下段：LH-4588CFG-7
A large hook of 1.8-fold capacity (as compared with the standard size hook ) is adopted.
Active tension mechanism is adopted As a result, frequency of thread changing is reduced in half. This is the world’s first sewing machine not only for
jeans and heavy-weight materials, but also for foundation and medium-weight materials that is provided with a large
Seam quality is improved by introducing the separately-driven right hook. This sewing machine provides further stable seam quality.
and left active tension mechanisms.
Motor-controlled horizontal feed is introduced. Stitch pitch can be set on the operation panel.
The needle thread tension is automatically corrected according the sewing
Reduction in time required for adjustment of hook timing
speed. Consistently seam quality is, therefore, achieved regardless of
Hook timing adjustment is required in the case of changing the needle gauge. The time required for this adjustment
changes in sewing speed.
is reduced. Adoption of the hook timing adjustment mode that can be activated by operating the operation panel as
The needle thread tension is automatically corrected according to the well as new hook driving shaft saddle achieves substantial reduction in workload required at the time of changing
remaining amount of bobbin thread. Seam quality is, therefore, stabilized the needle gauge. Needle guard of the hook can be adjusted with screw with ease.
even when the remaining amount of bobbin thread has reduced.

In the case of using the automatic needle thread tension correction Hook timing
feature according to the remaining amount of bobbin thread, the adjustment mode
bobbin-thread change notification signal is provided to warn the operator
when the remaining amount of bobbin thread has reduced to the
predetermined level.

Active presser foot mechanism is adopted

Thanks to the adoption of the active presser foot, the presser foot pressure
can now be corrected according to the sewing speed.

Hook driving shaft saddle Change in needle gauge Needle guard adjustment
 Work environment

Operator fatigue reduction

For the LED hand light, the improved toning function with two additional colors (white / light bulb color) is provided.
Various digitalized functions This LED hand light helps reduce the operator's eye fatigue who is engaged in sewing work for a long time.

Data and sewing machine management with IoT ( Internet of Things)

A "Two-way" contactless communication for parameter

adjustment data can be conducted with the sewing
machine by a commercial Android terminal. Mixed color White Light bulb color
This feature allows sewing machines in a sewing line
to be uniformly set and status checked quickly, thereby
contributing to stabilization in product quality.
Energy-saving effect
Control panel is standardized with USB ports,
promising simplicity in data management and system Automatic OFF function of the operation-panel backlight
updates. The operation-panel light can be turned OFF after a lapse of the preset time. can be automatically turned OFF.
(The setting is from 1 to 20 minutes.)

Sleep mode (Automatic power-OFF function)

If no operation is carried out for a predetermined period of time, power supply such as motor can be turned off.
JUKI Smart APP allows you to send (The setting is from 1 to 50 minutes.)

and confirm various data *These options can be set up on the operation panel.

In the application, there are items of management setting ( terminal registration), sewing machine data
( sewing data ), problem-solution chart. Reduction in noise and vibration
In the problem-solution chart, we can generate production graphs, the availability chart, etc. for each
acquired sewing machine data so it can be used for checking the current situation and analyzing it. Reduction in power consumption
Since the LH-4500C is provided with a compact AC servomotor, optimized presser foot lifting control method and the
actuator with increased power efficiency, its power consumption is reduced by 30.8 % as compared with the
LH-3500A. In addition, the power consumption during standby state is reduced by 50.8 % due to the operation panel
screen on which display can be turned OFF.

Reduction in noise / vibration

Noise / vibration produced by the LH-4500C is
reduced by various improvements such as the
adoption of 1/2 opener system. The LH-4500C
provides the work environment that helps reduce
the operator's fatigue. Bobbin case opening lever ( open ) Bobbin case opening lever ( close)

Comparison with the conventional model Comparison with the conventional model

Reduction by 35% Reduction by 40%

*Android OS Version 6.0 is recommended to use JUKI Smart APP.

( Operation is confirmed with respect to Versions 5.0 and later. )
Contact JUKI distributor in your area for how to use the application software.
LH-3500A LH-4500C LH-3500A LH-4500C
The sewing machine can be paired with equipment which supports NFC ( Near Field Communication )
only by holding the equipment over the sewing machine.
Comparison of noise Comparison of vibration
Conditions: 3,000 sti/min, Stitch length 3.0mm
* N-Mark is the trademark or registered registered mark of NFC Forum Inc. in the US and other countries.

JUKI ECO PRODUCTS The LH-4500C is an eco-friendly product which complies with JUKI ECO PRODUCTS standards for protecting the environment.

The sewing machine complies with the "Juki Group Green Procurement Guidelines" on the use of hazardous substances,
which is stricter than other restrictions, such as those of the RoHS Directive.
For details of JUKI ECO PRODUCTS, refer to: https://www.juki.co.jp/en/company/eco
The RoHS Directive is an EU Directive limiting the use of 6 hazardous substances (lead, hexavalent chromium, mercury, cadmium, PBB and PBDE) in electrical and electronic equipment.
The Juki Green Procurement Guideline is the voluntarily established criteria to eliminate not only the aforementioned six substances, but also other ones which also adversely affect the environment.
 WHEN YOU PLACE ORDERS
Large hook (1.8-fold capacity hook) is adopted for foundation type and medium-weight type
Please note when placing orders, that the model name should be written as follows:
A larger hook (1.8-fold capacity hook) is adopted for foundation type that use thin threads and for medium-weight type.
This is the world’s first use of a large hook (1.8-fold capacity hook) for foundation type and medium-weight material Machine head
type. As a result, the frequency of thread changing is reduced by approximately 40%, the work hours are reduced and without automatic thread trimmer

LH 4 5 7 8 C F F0 B
the operator’s fatigue is reduced. In addition, the bobbin thread remaining amount correction function of this machine
contributes to more consistent seam quality.

Example of brassier tape attaching process

Type of hook Large hook ( 1.8-fold capacity hook) Regular hook Digital Seam Needle gauge Code Nipper and Option Code
Code
Specifications application 6.4mm (1/4) F one-touch type reverse feed Multilayered portion
Amount of thread wound on a bobbin / time 108m 60m Code S
Foundation FF One-touch type detection device
Number of times of bobbin changing / day 11 times 19 times Full digital type Nipper
Medium-weight FS reverse feed Not provided -
Number of times of bobbin changing / month 550 times (two bobbins ) 950 times (two bobbins )
Not Provided Provided 0B *Seam application “FS” is available
● 8 hours / day; 25 days /month; Replacing a bobbin requires approximately one minutes.
for “Multilayered portion detection
device” only.

Tape attaching gauge LH-4578CFF: For foundation with automatic thread trimmer

The tape attaching gauge that is best-suited to the foundation tape attaching process is now standard equipment. LH 4 5 8 C F F7 B
(Tape attaching throat plate, Presser foot with guide, Sliding plate with groove)
Also, various sizes are available as optional parts.
Part number
Machine head Code Digital Seam Needle gauge Code Nipper and
Code
inch mm Tape attaching Presser foot
Large hooks 7 Specifications application 6.4mm (1/4) F one-touch type reverse feed
throat plate with guide Code
guide Organized split needle bar, Medium-weight FS Nipper
One-touch type
1/8 3.2 40232772 22647051 8 Full digital reverse feed
large hooks Jeans and
3/16 4.8 40232774 22647150 type FG
heavy-weight Not Provided Provided 0B
7/32 5.6 40232775 22647259 Provided Provided NB
1/4 6.4 40221496 22647358 Bed slide ( this side ):
Tape attaching throat plate Presser foot Part number 23206709
9/32 7.1 40232776 22647457
This throat plate has a recess on with guide The bed slide reduces
5/16 7.9 40232777 22647556 Needle gauge size
the operator side to help smoothly the height when securing
guide the tape to be attached.
● For the foundation specifications, the above 1/4 inch
the tape attaching holder. ［ ○: A gauge designed for factory-installation at delivery. △: A gauge available as a part. ］
(6.4 mm) gauge is standard equipment.
Seam application
Needle gauge
Code LH-4578CF LH-4578CF LH-4578CF-7 LH-4588CF-7 LH-4578CF-7 LH-4588CF-7
OPTION inch mm F S G
A 3/32 2.4            
Tape cutter device (AT-45 )
B 1/8 3.2 △ △ △ △ △ △
C 5/32 4.0   △ △ △ △ △
This tape cutter helps increase productivity in processes such as the tape sewing process where the thread
D 3/16 4.8 △ △ △ △ △ △
trimmer cannot be used and a pair of scissors is used instead.
E 7/32 5.6 △ △ △ △ △ △
F 1/4 6.4 ○ ○ ○ ○ ○ ○
1. The AT-45 tape cutter is a motor-driven device. Therefore, its operating noise is
G 9/32 7.1 △ △ △ △ △ △
considerably lower than that of the air-driven tape cutter.
H 5/16 7.9 △ △ △ △ △ △
2. The tape cutter does not require air piping. This means that you can move the
sewing machine as you like in the case of changing the workshop layout. K 3/8 9.5 △ △ △ △ △
W 7/16 11.1 △ △ △
3. The tape cutter is able to cut the tape short just behind the presser foot (2.2 mm
away from center of the presser foot bar). L 1/2 12.7 △ △ △ △ △
M 5/8 15.9 △ △ △ △ △
4. Since the height of the standby position of the knife is 25 mm above the throat plate
surface, you do not need to worry about the product being caught by the knife. N 3/4 19.1 △ △ △ △ △

5. The tape cutter is provided with a Safety control function. The safety device P 7/8 22.2 △ △ △ △ △
prevents the tape cutter from operating while the sewing machine is in operation. Q 1 25.4 △ △ △ △ △
Therefore, the tape cutter will never damage the product by mistake. R 1-1/8 28.6 △ △ △
6. Three different operating methods are available. Select one from them; i.e., by S 1-1/4 31.8 △ △ △
pressing the touch-back switch, by depressing the back part of the pedal and by T 1-3/8 34.9 △
operating the external input switch (part number: 40232800). U 1-1/2 38.1 △
● Refer to the Parts List for details

Device name Device No. Needle gauge size Throat plate

AT45AK Control box

40246381
(Single phase 200~240V) Coad

AT45AD
(3-phase 200~240V, 40252490* inch mm Standard with tape guide S C 9 5 6 B
Single-phase 110V) D 3/16 4.8 40240834 40246475

AT45AN E 7/32 5.6 40240833 40246476

40253196* Power supply Code
(Single phase 200~240V(CE)) F 1/4 6.4 40240832 40246477
Single-phase 100 ~ 120V S
*To be available in the near future G 9/32 7.1 40240835 40246478
3-phase 200 ~ 240V D
H 5/16 7.9 40240836 40246479
Single-phase 200 ~ 240V K
● Throat plate is not supplied with the main body of the AT-45 tape cutter. It is therefore necessary to separately
place an order for the throat plate given in table as shown above. Single-phase 200 ~ 240V (for CE) N
● Please note that this needle plate cannot be attached to a sewing machine with automatic thread trimmer.
Single-phase 200 ~ 240V (for China ) U