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MF-7500 Series
High-speed, Flat-bed, Top & Bottom Coverstitch Machine
MF-7500D Series
Semi-dry-head, Flat-bed, Top & Bottom Coverstitch Machine
MF-7523D-U11-B56
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The feed locus can be adjusted externally. The feed locus is now
adjustable in terms of the vertical direction and horizontal direction,
thereby improving responsiveness to sewing materials.
It is provided with many different sewing-related mechanisms which contribute to
improved seam quality, such as the new feed mechanism, and differential-feed
micro-adjustment mechanism. In addition, the machine is provided as standard with
a looper thread twining prevention mechanism for improved maintenance.
The MF-7500 Series is
a newly developed coverstitch machine
provided with lots of mechanisms
for improving the seam quality.
It is possible to finely adjust the differential feed amount to a best-suited
value for the material to be used. The differential feed ratio is constant
even if the stitch length is changed.
The longitudinal position of the
feed is adjustable. As a result,
uneven material feed and
puckering that are likely to occur
when sewing products made of
elastic materials such as
foundations are reduced. This
means that the machine promises
improved responsiveness to
elastic materials.
Elastic material or delicate
material can be sewn with the
presser foot kept slightly raised.
This effectively helps reduce the
degree of slippage, warpage and
damage of the material.
Seam quality is improved!!
Main
feed dog
Differential
feed dog
Micro-lifter mechanismDifferential-feed micro-adjustment mechanism
The
world's
first
Thanks to the new feed mechanism,
many different types of sewing are achieved.
Feed longitudinal position adjustment mechanism
Horizontal
direction
Vertical
direction
Differential
feed dog
Main
feed dog
Contract
Expand
MF-7500
Series
High-speed, Flat-bed,
Top & Bottom Coverstitch Machine
MF-7500/UT
Series
Direct-drive, High-speed, Flat-bed,
Top & Bottom Coverstitch Machine with Needle- and Looper- Thread Trimmer
MF-7500D
Series
Semi-dry-head, Flat-bed,
Top & Bottom Coverstitch Machine
MF-7500D/UT
Series
Semi-dry-head, Direct-drive, Flat-bed,
Top & Bottom Coverstitch Machine with Needle- and Looper- Thread Trimmer
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JUKI's dry-head technology
protects sewing products from being stained with oil.
In the case of looper thread
breakage, the looper thread
twining prevention mechanism is
activated to trim the looper thread
before the thread twines on the
looper thread cam. In this way, the
looper thread twining prevention
mechanism prevents the looper
thread from twining on the looper
thread cam. In addition, the looper thread cam, which has been
incorporated in the sewing machine, has been changed so that it is
mounted outside of the sewing machine. The externally-mounted looper
thread cam promises improved maintainability.
As a result of the commonality of components, commercially-available
components (presser foot, throat plate and needle clamp) are now
applicable and easily obtainable.
With the excellent functions inherited from the MF-7500 Series, the MF-7500D is provided
with a dry frame mechanism to eliminate the cause of oil stains. Stain removing work or
re-sewing work is substantially reduced by protecting sewing products from being
stained with oil, thereby improving the quality of finished products.
The frame no longer requires oiling.
Dry-head technology has materialized
a frame which does not need oiling.
Environmental consciousness
Dichlorofluoroethane (HCFC-141), which is generally used in
oil stain cleaning fluid, is included in those chemicals which
need to be reduced, as it is a substances that can harm the
ozone layer.
Since oil stains on sewing products are reduced, the quantity
of the use of stain remover generally used in sewing plants
can be reduced.
The needle bar mechanism and spreader mechanism have been applied with a
special surface treatment.
JUKI's unique special grease is used for lubrication. Grease-filled bearings have
been adopted for the crank rod. These allow the machine's frame mechanism to
demonstrate outstanding durability without being oiled.
Unlike the conventional models, the oiling mechanism inside the frame has been eliminated.
As a result, oil does not leak from the needle bar, presser bar or spreader shaft.
Simplified maintenance mechanism
All of the sewing machines with
a thread trimmer are provided
with a direct-drive motor.
By changing over the needle bar stroke, penetrating force of the
needle as well as thread tension to fit heavy-weight materials
(fleece, blankets) can be obtained. The needle bar stroke can be
changed by adjusting the eccentric pin. (Changing of parts is not
required. Factory-set at the time of delivery: 31mm; for sewing
heavy-weight materials: 33mm)
Needle bar stroke conversion mechanism
The direct-drive motor system has
been adopted by all of the sewing
machines with a thread trimmer. As a
result, the sewing machine starts up
swiftly and promises increased stop
accuracy, thereby demonstrating
improved responsiveness. In addition,
the machine is no longer provided with
a V-belt. This means that the adoption
of the direct-drive motor is also
effective in the elimination of belt shavings. Power is directly transmitted
from the motor to the sewing machine, thereby contributing to reduced
power consumption. (This sewing machine reduces power consumption
by 29% as compared with the conventional models.)
MF-7723/UT31/SC510
MF-7523/UT37/SC921B/CP18B
Servomotor
Direct-drive motor
The semi-dry
head sewing machine
increases its sewing
speed to
5,000
sti/min
head type sewing
machine has been
added.
A semi-dry
The
world's
first
Commercially-available gauge components
are applicable with no additional work.
The looper thread twining prevention mechanism
has been improved and is provided as standard
for the sewing machine.
29%
Power
consumption
Reduced by
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Universal type
(basic type)
T-shirts knitwear sportswear
6,500
6,000
4,200
MF-7523D-U11-B＊＊
MF-7523D-U11-B＊＊ /UT35
MF-7523D-U11-B＊＊ /UT37
Application Seam
Model No.
Number
of
needles
Number
of
threads
Needle
gauge
(mm)
2
3
4
5 5.6,6.4
Stitch
length *
1
(mm)
1.2~3.6
1.2~3.6
1:0.7~1:2 5 (8)
5,000
5 (8)1:0.7~1:2
MF-7500D-U11
Universal type
(basic type)
MF-7500-U11
Universal type
(basic type)
Differentialfeed
ratio
Presser foot
lifting amount *
2
(mm)
Max. sewing
speed
(sti/min)
*1 Stitch length can be adjusted to 4.4mm at the maximum.
*2 The lift of the presser foot is 5mm for the top and bottom coverstitch machine, and 8mm for the bottom coverstitch machine
List of subclass machines
Application Seam
Model No.
Number
of
needles
Number
of
threads
Needle
gauge
(mm)
Stitch
length *
1
(mm)
Differentialfeed
ratio
Presser foot
lifting amount *
2
(mm)
Max. sewing
speed
(sti/min)
List of subclass machines
3.2,4.0
4.0,4.8,56,6.4
6.4
5.6,6.4
4.8,56,6.4
MF-7522-U11-B＊＊
4 6
6.0
MF-7524-U11-D60
4,200
4 6
6.0
MF-7524D-U11-D60
3 5
MF-7523-U11-B＊＊
MF-7523-U11-D64
MF-7523-U11-B＊＊ /UT35
MF-7523-U11-B＊＊ /UT37
Bracket asm.
Replacement parts
for basic type
13303458
U11
MF-7522-C11-B＊＊
MF-7522-C11-B40/TC16
MF-7523-C11-B＊＊
MF-7523-C11-B56/TC16
MF-7522D-C11-B40
MF-7522D-C11-B40/TC16
MF-7523D-C11-B＊＊
MF-7523D-C11-B56/TC16
2
3
2
3
4
5
4 4.0
5
1.2~3.6
1.2~3.6
1:0.6~1:1 5 (8) 6,500
5,0005 (8)1:0.7~1:1.1
MF-7500D-C11
For collarette
attaching
MF-7500-C11
For collarette
attaching
*1 Stitch length can be adjusted to 4.4mm at the maximum.
*2 The numeric value indicates the lifting amount of the presser foot for top and bottom coverstitch. The numeric value given in parentheses indicates the lifting amount of the presser foot for bottom coverstitch.
3.2,4.0
4.0
4.8,5.6,6.4
5.6
5.6,6.4
5.6
This model is best suited for attaching collarettes on underwear, briefs and
knitwear. Ease of use is further improved by using the electromagnetic
type tape cutter (TC16).
＊
U11: Modification to the universal type
(basic type) model is easily achieved simply
by changing the throat plate and feed dog.
For collarette attaching
C11
briefsknitwear
MF-7523D-C11-B56/TC16
MF-7523-U11-B56
A front bracket is supplied
with the sewing machine
as an accessory.
The machine can be used for the hemming process of the sleeves and bottoms
of T-shirts and for the covering process for sportswear and knitwear.
The front cover is trimmed to allow operators to bring their hands closer
near the needle entry area, thereby increasing work efficiency in the
covering process, etc.
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TC16
Electromagnetic type tape cutter
It is a device for cutting the tape or lace at the beginning or end of sewing. It is easily
actuated to cut tape with the knee switch.
●The knife is able to cut lace and tape up to 40mm wide.
●The sharpness of the knife can be easily adjusted. In addition, replacement of the
moving knife and counter knife, as well as the adjustment of their mesh, can be carried
out with ease.
MD11
Mechanical type metering device
●The metering device supplies a consistent length of tape in synchronization with the
feed. (tape lengths: 0.9 to 3.5mm per stitch.)
●Elastic tapes of up to 80mm in width can be used. The tape width can be easily
adjusted. For lace of which the width is 15 to 80mm, change the currently-mounted
guide with the wider-tape guide that is supplied with the unit as an accessory.
●The drive roller/driven roller can be held open to facilitate tape placement.
Device
Application Seam
Model No.
Number
of
needles
Number
of
threads
Needle
gauge
(mm)
Stitch
length *
1
(mm)
Differentialfeed
ratio
Presser foot
lifting amount *
2
(mm)
Max. sewing
speed
(sti/min)
List of subclass machines
6,500
MF-7523-E11-B＊＊
MF-7523-E11-B＊＊ /MD11
MF-7523-E11-B＊＊ /MD11/TC16＊
0.9~3.6
1:0.9,1:1.8
(1:0.6,1:1.1)
5 (8)
*1 Stitch length can be adjusted to 4.4mm at the maximum.
*2 The lift of the presser foot is 5mm for the top and bottom coverstitch machine, and 8mm for the bottom coverstitch machine
2 4
3 5
3 5
3.2,4.0
MF-7522-E11-B＊＊
5,0000.9~3.6
1:0.9,1:1.8
(1:0.6,1:1.1)
5 (8)
4.0
5.6
5.6,6.4
5.6
MF-7522D-E11-B40/MD11
MF-7523D-E11-B56
MF-7523D-E11-B＊＊ /MD11
MF-7523D-E11-B56/MD11/TC16＊
5,000
6,500
5,000
4.0
5.6,6.4
MF-7522-E11-B40/MD11
MF-7522-E11-B40/MD11/TC16＊
24
MF-7500-E11
Elastic lace
attaching
MF-7500D-E11
Elastic lace
attaching
For elastic lace attaching
(with right hand fabric trimmer)
E11
Shorts
Ladies'
inner wear
This model is best suited for the sewing of elastic lace in shorts and underwear.
The right hand fabric trimmer cuts the multi-layered part of a joined section with outstanding
consistency. Beautifully finished products are achieved with the seams and material edges aligned.
The right hand fabric trimmer mechanism's easy installation / removal of the entire unit facilitates
the adjustment of related parts, such as the alignment of a looper.
＊The machine can also be used for collarette-attaching processes by removing the knife unit. (Replacement of the gauge and cover is required.)
MF-7523D-E11-B56/MD11/TC16
TC16
Adjustment of the tape feeding amount
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Compressedair / Air consumption
(with automatic thread trimmer)
UT35
Electromagnetic type top and bottom thread trimming device/Auto-lifter
UT37
Pneumatic type top and bottom thread trimming device/Auto-lifter
It is an electromagnetic type automatic thread trimming device/auto-lifter.
The machine does not need an air compressor to achieve easy layout changing.
Presser lifter drive mechanism
Air blow type wiper
It is a pneumatic automatic thread trimming device / auto-lifter.
Since the automatic lift of the presser foot and automatic thread trimming can be activated by lightly
depressing the pedal, work efficiency is dramatically increased.
By using an air blow type wiper nozzle
(supplied as an accessory), the
needle thread can be blown upon
thread trimming at the end of bottom
coverstitching.
Thread trimmer drive mechanism
Presser lifter drive mechanism
1
Thread trimmer drive mechanism
2
1
2
Air blow type
wiper
Air consumption
dm
3
/min (ANR)
Compressed air
MPa
Top and bottom
thread trimmer
Auto-lifter
―●
●
0.7
182
0.5
●
UT37
Device
Electromagnetic type top and bottom
thread trimming mechanism
Pneumatic type top and bottom
thread trimming mechanism
MF-7523D-U11-B56/UT37
MF-7523-U11-B56/UT35
1
2
1
2
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Stitch type
2-needle, top and bottom coverstitch
Code
22
3-needle, top and bottom coverstitch
23
4-needle, top and bottom coverstitch
24
Stitch type Code
3-needle, top and bottom coverstitch 23
Tongue shape of throat plate
B type
Code
B
D type
D
Stitch type
2-needle, top and bottom coverstitch
Code
22
3-needle, top and bottom coverstitch
23
4-needle, top and bottom coverstitch
24
Tongue shape of throat plate
B type
Code
B
D type
D
Tongue shape of throat plate
B type
Code
B
Thread trimming device
Electromagnetic type top and bottom
thread trimming device
Code
UT35
Pneumatic type top and bottom
thread trimming device
UT37
Stitch type Code
3-needle, top and bottom coverstitch 23
Tongue shape of throat plate
B type
Code
B
Thread trimming device
Electromagnetic type top and bottom
thread trimming device
Code
UT35
Pneumatic type top and bottom
thread trimming device
UT37
MF75
//
MF75 D
//
MF-7500
MF-7500D (Semi-dry-head)
※1※2Specify the MD11 when placing your order.
The TC16 can be retrofitted to the machine.
Application
Universal type
Code
U11
Collarette attaching
C11
Elastic lace attaching
E11
Needle gauge
3.2mm
Code
32
4.0mm
40
4.8mm
48
5.6mm
56
6.0mm
60
6.4mm
64
Application
Universal type
Code
U11
Needle gauge
Code
4.8mm
48
5.6mm
56
6.4mm
64
Application
Universal type
Code
U11
Needle gauge
Code
5.6mm
56
6.4mm
64
Device and attachment
Not provided
Code
Mechanical type metering device
※1
MD11
Electromagnetic type tape cutter (3-phase 200-440V)
※2
TC16A
Electromagnetic type tape cutter (Single-phase 100-240V)
※2
TC16B
Electromagnetic type tape cutter (SC-921)
※2
TC16C
※Refer to the subclass models list
for the needle gauge of the
respective models.
Application
Universal type
Code
U11
Collarette attaching
C11
Elastic lace attaching
E11
Needle gauge
Code
4.0mm
40
5.6mm
56
6.0mm
60
6.4mm
64
※Refer to the subclass models list
for the needle gauge of the
respective models.
※Refer to the subclass models list for
the tongue shape of throat plate of
the respective models.
※1※2Specify the MD11 when placing your order.
The TC16 can be retrofitted to the machine.
Device and attachment
Not provided
Code
Mechanical type metering device
※1
MD11
Electromagnetic type tape cutter (3-phase 200-440V)
※2
TC16A
Electromagnetic type tape cutter (Single-phase 100-240V)※2TC16B
Electromagnetic type tape cutter (SC-921)
※2
TC16C
※Refer to the subclass models list for
the tongue shape of throat plate of
the respective models.
MF7523U11B UT
MF7523DU11B UT
WHEN YOU PLACE ORDERS
Please note when placing orders, that the model name should be written as follows:
Without automatic thread trimmer
Without automatic thread trimmer
With automatic thread trimmer (Direct-drive motor)
With automatic thread trimmer (Direct-drive motor)
SC-921B
CP-18B
Control box
Operation panel
SC-921B
CP-18B
Control box
Operation panel
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SEPTEMBER, 2013 Printed in Japan(C)
SEWING MACHINERY BUSINESS UNIT
2-11-1, TSURUMAKI, TAMA-SHI,
TOKYO
206-8551, JAPAN
PHONE : (81) 42-357-2254
FAX :
(
81
)
42-357-2274
http://www.juki.com
✽
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.
Juki Corporation operates an environmental management system
to promote and conduct the following as the company engages in
the research, development, design, sales, distribution,and
maintenance of industrial sewing machines, household sewing
machines, industrial robots, etc., and in the provision of sales and
maintenance services for data entry systems:
(1) The development of products and engineering processes
that are safe to the environment
(2) Green procurement and green purchasing
(3)
Energy conservation (reduction in carbon-dioxide emissions)
(4) Resource saving (reduction of papers purchased, etc.)
(5) Reduction and recycling of waste
(6) Improvement of logistics efficiency (modal shift and
improvement of packaging, packing, etc.)
JUKI ECO PRODUCTS
The MF-7523U11B56/UT37 is an eco-friendly product which complies with
JUKI ECO PRODUCTS standards for protecting the environment.
This sewing machine reduces power consumption by 29% as compared with the conventional models.
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 : http://www.juki.co.jp/eco_e/index.html
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.
Stitch type
Needle
Lift of the presser foot
Lubrication
2-needle/3-needle/4-needle top and bottom covering stitch
UY128GAS (#10S) #9~#12
Silicon oil tank for needle tip and needle thread
Cartridge oil filter
Provided as standard
Provided as standard
JUKI Machine Oil 18 (equivalent to ISO VG18)
Provided as standard
Provided as standard
Lubricating oil
Feed dog inclination adjustment
Micro-lifter
Stitch pitch adjustment
Differential feed adjustment
By dial
By micro-adjustment mechanism
Model name
MF-7500 series MF-7500D series
Automatiac
Automatic
(frame: no lubrication)
45kg (without device), 53kg (with UT35), 58kg (with UT37)
45kg (without device)
46kg (without device)
U11
C11
E11
Weight of the machine head
"sti/min" stands for "Stitches per Minute."
SPECIFICATIONS (U11, C11, E11
)
5mm (with top and bottom covering stitch),
8mm (with bottom covering stitch)
Needle bar stroke converting function
Provided as standard: 31mm: at the time of delivery /
When sewing a heavy-weight material: 33mm
Power consumption 500VA (with automatic thread trimmer)
Power requirement
Single-phase 100~120V / 200~240V,
3-phase 200~240V (with automatic thread trimmer)
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