Juki Mf-7500 series User manual

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

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

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

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

needles

Number

threads

Needle

gauge

(mm)

5 5.6,6.4

Stitch

length *1

(mm)

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

needles

Number

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

4 4.0

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.

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

needles

Number

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

3.2,4.0

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＊

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

Compressedair / Air consumption

(with automatic thread trimmer)

UT35 Electromagnetic type top and bottom thread trimming device/Auto-lifter

UT37Pneumatic 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

Thread trimmer drive mechanism

Air blow type

wiper

Air consumption

dm3/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

Stitch type

2-needle, top and bottom coverstitch

Code

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

D type D

Stitch type

2-needle, top and bottom coverstitch

Code

3-needle, top and bottom coverstitch 23

4-needle, top and bottom coverstitch 24

Tongue shape of throat plate

B type

Code

D type D

Tongue shape of throat plate

B type

Code

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

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

※2

Specify 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

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

※2

Specify 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)※2 TC16B

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

With automatic thread trimmer (Direct-drive motor)

SC-921B

CP-18B

Control box

Operation panel

SC-921B

CP-18B

Control box

Operation panel

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

JUKI Machine Oil 18 (equivalent to ISO VG18)

Provided as standard

Lubricating oil