JUKI LU-2800 Series Quick start guide

40133310
No. E407-03
ENGINEER’S MANUAL
Unison-feed, Lockstitch Machine with Vertical-axis Large Hook
LU-2800 Series
LU-2810, 2810-7, 2860, 2860-7
LU-2810-6, 2860-6, 2828-6, 2828-7
LU-2818-7, 2868-7

PREFACE
This Engineer’s Manual is written for the technical personnel who are responsible for the service and
maintenance of the machine.
The Instruction Manual for these machines intended for the maintenance personnel and operators at
an apparel factory contains operating instruction in detail. And this manual describes “Standard Adjust-
ment”, “Adjustment Procedures”, “Results of Improper Adjustment”, and other important information
which are not covered in the Instruction Manual.
When carrying out the maintenance work on the sewing machine, be sure to refer also to the Instruction
Manual and the Parts List.
In addition, for the motor for the sewing machine with thread trimmer, refer to the separate Instruction
Manual or This manual gives the “Standard Adjustment” on the former page under which the most basic
adjustment value is described, and on the latter page “Results of Improper Adjustment” under which
stitching errors and troubles arising from mechanical failures and “How to adjust” are described.

i
For the sewing machine, automatic machine and ancillary devices (hereinafter collectively referred to as
"machine"), it is inevitable to conduct sewing work near moving parts of the machine. This means that there
is always a possibility of unintentionally coming in contact with the moving parts. Operators who actually
operate the machine and maintenance personnel who are involved in maintenance and repair of the machine
are strongly recommended to carefully read to fully understand the following Safety precautions of this
engineer's manual before using/maintaining the machine. The content of the Safety precautions of this
engineer's manual includes items which are not contained in the specications of your product.
The risk indications are classied into the following three different categories to help understand the meaning
of the labels of this engineer's manual and the product. Be sure to fully understand the following description
and strictly observe the instructions.
( I ) Explanation of risk levels
( II ) Explanation of pictorial warning indications and warning labels
Warning label
❶
❷
❸
❶
• There is the possibility that slight to serious injury or death may be caused.
• There is the possibility that injury may be caused by touching moving part.
❷• To perform sewing work with safety guard.
• To perform sewing work with safety cover.
• To perform sewing work with safety protection device.
❸
• Be sure to turn the power OFF before carrying out "machine-head threading,"
"needle changing," "bobbin changing" or "oiling and cleaning.
❸
❷
❶
Electrical-shock
danger label
DANGER :
This indication is given where there is an immediate danger of death or serous injury if the person in charge or any third
party mishandles the machine or does not avoid the dangerous situation when operating or maintaining the machine.
WARNING :
This indication is given where there is a potentiality for death or serious injury if the person in charge or any third party
mishandles the machine or does not avoid the dangerous situation when operating or maintaining the machine.
CAUTION :
This indication is given where there is a danger of medium to minor injury if the person in charge or any third party
mishandles the machine or does not avoid the dangerous situation when operating or maintaining the machine.
Items requiring special attention
Pictorial warning indication
There is a risk of injury if contact-
ing a moving section.
Pictorial warning
indication
Be aware that holding the sewing
machine during operation can
hurt your hands.
There is a risk of electrical shock if
contacting a high-voltage section.
There is a risk of entanglement
in the belt resulting in injury.
There is a risk of a burn if contact-
ing a high-temperature section.
There is a risk of injury if you
touch the button carrier.
Be aware that eye deciency can
be caused by looking directly at
the laser beam.
Indication label
The correct direction is indicat-
ed.
There is a risk of contact between
your head and the sewing ma-
chine.
Connection of a earth cable is
indicated.
TO ENSURE SAFE USE OF YOUR SEWING MACHINE
Adjustment :
It means replacement of parts,
disassembly, and repair assembly.

ii
Basic precaution
1. Be sure to read the engineer's manual and other explanatory documents supplied with accessories of
the machine before using the machine. Carefully keep the engineer's manual and the explanatory docu-
ments at hand for quick reference.
2. The content of this section includes items which are not contained in the specications of your product.
3. Be sure to wear safety goggles to protect against accident caused by needle breakage.
4. Those who use a heart pacer have to use the machine after consultation with a medical specialist.
5. Turn OFF the power before starting the work in order to protect against accident that can result in per-
sonal injury.
If it is inevitable to carry out work with the power ON, utmost care should be taken to prevent from de-
pressing the foot pedal or pressing the start switch by mistake.
6. Make sure, after the completion of replacement work, that neither connectors nor cables are damaged,
slipped off or loosened in order to protect against accident that can result in personal injury.
Safety devices and warning labels
1. Be sure to operate the machine after verifying that safety device(s) is correctly installed in place and
works normally in order to prevent accident caused by lack of the device(s).
2. If any of the safety devices is removed, be sure to replace it and verify that it works normally in order to
prevent accident that can result in personal injury or death.
3. Be sure to keep the warning labels adhered on the machine clearly visible in order to prevent accident
that can result in personal injury or death. If any of the labels has stained or come unstuck, be sure to
change it with a new one.
Application and modication
1. Never use the machine for any application other than its intended one and in any manner other than that
prescribed in the engineer's manual in order to prevent accident that can result in personal injury or death.
JUKI assumes no responsibility for damages or personal injury or death resulting from the use of the
machine for any application other than the intended one.
2. Never modify and alter the machine in order to prevent accident that can result in personal injury or death.
JUKI assumes no responsibility for damages or personal injury or death resulting from the machine
which has been modied or altered.
Education and training
1. In order to prevent accident resulting from unfamiliarity with the machine, the machine has to be used
only by the operator who has been trained/educated by the employer with respect to the machine oper-
ation and how to operate the machine with safety to acquire adequate knowledge and operation skill. To
ensure the above, the employer has to establish an education/training plan for the operators and edu-
cate/train them beforehand.
Items for which the power to the machine has to be turned off
Turning the power off: Turning the power switch off, then removing the power plug from the outlet. This
applies to the following.
1. Be sure to immediately turn the power off if any abnormality or failure is found or in the case of power
failure in order to protect against accident that can result in personal injury or death.
2. To protect against accident resulting from abrupt start of the machine, be sure to carry out the follow-
ing operations after turning the power off. For the machine incorporating a clutch motor, in particular,
be sure to carry out the following operations after turning the power off and verifying that the machine
stops completely.
2-1. For example, threading the parts such as the needle, looper, spreader etc. which have to be thread-
ed, or changing the bobbin.
2-2. For example, changing or adjusting all component parts of the machine.
2-3. For example, when inspecting, repairing or cleaning the machine or leaving the machine.
3. Be sure to remove the power plug by holding the plug section instead of the cord section in order to pre-
vent electrical-shock, earth-leakage or re accident.
4. Be sure to turn the power off whenever the machine is left unattended between works.
5. Be sure to turn the power off in the case of power failure in order to prevent accident resulting of break-
age of electrical components.
PRECAUTIONS TO BE TAKEN IN VARIOUS OPERATION STAGES
Accident means "to cause
personal injury or death or
damage to property."
CAUTION
DANGER
SAFETY PRECAUTIONS
1. When it is necessary to open the control box containing electrical parts, be sure to turn the power off and
wait for ve minutes or more before opening the cover in order to prevent accident leading to electrical
shock.

iii
Transportation
1. Be sure to lift and move the machine in a safe manner taking the machine weight in consideration. Refer
to the text of the engineer's manual for the mass of the machine.
2. Be sure to take sufcient safety measures to prevent falling or dropping before lifting or moving the
machine in order to protect against accident that can result in personal injury or death.
3. Once the machine has been unpacked, never re-pack it for transportation to protect the machine against
breakage resulting from unexpected accident or dropping.
Unpacking
1. Be sure to unpack the machine in the prescribed order in order to prevent accident that can result in
personal injury or death. In the case the machine is crated, in particular, be sure to carefully check nails.
The nails have to be removed.
2. Be sure to check the machine for the position of its center of gravity and take it out from the package
carefully in order to prevent accident that can result in personal injury or death.
Installation
(I) Table and table stand
1. Be sure to use JUKI genuine table and table stand in order to prevent accident that can result in personal
injury or death. If it is inevitable to use a table and table stand which are not JUKI genuine ones, select the
table and table stand which are able to support the machine weight and reaction force during operation.
2. If casters are tted to the table stand, be sure to use the casters with a locking mechanism and lock
them to secure the machine during the operation, maintenance, inspection and repair in order to prevent
accident that can result in personal injury or death.
(II) Cable and wiring
1. Be sure to prevent an extra force from being applied to the cable during the use in order to prevent electri-
cal-shock, earth-leakage or re accident. In addition, if it is necessary to cable near the operating section
such as the V-belt, be sure to provide a space of 30 mm or more between the operating section and the cable.
2. Be sure to avoid starburst connection in order to prevent electrical-shock, earth-leakage or re accident.
3. Be sure to securely connect the connectors in order to prevent electrical-shock, earth-leakage or re
accident. In addition, be sure to remove the connector while holding its connector section.
(III) Grounding
1. Be sure to have an electrical expert install an appropriate power plug in order to prevent accident caused
by earth-leakage or dielectric strength voltage fault. In addition, be sure to connect the power plug to the
grounded outlet without exceptions.
2. Be sure to ground the earth cable in order to prevent accident caused by earth leakage.
(IV) Motor
1. Be sure to use the specied rated motor (JUKI genuine product) in order to prevent accident caused by
burnout.
2. If a commercially available clutch motor is used with the machine, be sure to select one with an entan-
glement preventive pulley cover in order to protect against being entangled by the V-belt.
Before operation
1. Be sure to make sure that the connectors and cables are free from damage, dropout and looseness be-
fore turning the power on in order to prevent accident resulting in personal injury or death.
2. Never put your hand into the moving sections of the machine in order to prevent accident that can result
in personal injury or death.
In addition, check to be sure that the direction of rotation of the pulley agrees with the arrow shown on
pulley.
3. If the table stand with casters is used, be sure to secure the table stand by locking the casters or with
adjusters, if provided, in order to protect against accident caused by abrupt start of the machine.
During operation
1. Be sure not to put your ngers, hair or clothing close to the moving sections such as the handwheel,
hand pulley and motor or place something near those sections while the machine is in operation in order
to prevent accident caused by entanglement that can result in personal injury or death.
2. Be sure not to place your ngers near the surround area of the needle or inside the thread take-up lever
cover when turning the power on or while the machine is in operation in order to prevent accident that
can result in personal injury or death.
3. The machine runs at a high speed. Never bring your hands near the moving sections such as looper,
spreader, needle bar, hook and cloth trimming knife during operation in order to protect your hands
against injury. In addition, be sure to turn the power off and check to be sure that the machine complete-
ly stops before changing the thread.
4. Be careful not to allow your ngers or any other parts of your body to be caught between the machine
and table when removing the machine from or replacing it on the table in order to prevent accident that
can result in personal injury or death.
5. Be sure to turn the power off and check to be sure that the machine and motor completely stop before re-
moving the belt cover and V-belt in order to prevent accident caused by abrupt start of the machine or motor.
6. If a servomotor is used with the machine, the motor does not produce noise while the machine is at rest.
Be sure not to forget to turn the power off in order to prevent accident caused by abrupt start of the motor.
7. Never use the machine with the cooling opening of the motor power box shielded in order to prevent re
accident by overheat.

iv
Lubrication
1. Be sure to use JUKI genuine oil and JUKI genuine grease to the parts to be lubricated.
2. If the oil adheres on your eye or body, be sure to immediately wash it off in order to prevent inamma-
tion or irritation.
3. If the oil is swallowed unintentionally, be sure to immediately consult a medical doctor in order to pre-
vent diarrhea or vomiting.
Maintenance
1. In prevention of accident caused by unfamiliarity with the machine, repair and adjustment has to be car-
ried out by a service technician who is thoroughly familiar with the machine within the scope dened in
the engineer's manual. Be sure to use JUKI genuine parts when replacing any of the machine parts. JUKI
assumes no responsibility for any accident caused by improper repair or adjustment or the use of any
part other than JUKI genuine one.
2. In prevention of accident caused by unfamiliarity with the machine or electrical-shock accident, be sure
to ask an electrical technician of your company or JUKI or distributor in your area for repair and mainte-
nance (including wiring) of electrical components.
3. When carrying out repair or maintenance of the machine which uses air-driven parts such as an air cyl-
inder, be sure to remove the air supply pipe to expel air remaining in the machine beforehand, in order to
prevent accident caused by abrupt start of the air-driven parts.
4. Be sure to check that screws and nuts are free from looseness after completion of repair, adjustment
and part replacement.
5. Be sure to periodically clean up the machine during its duration of use. Be sure to turn the power off
and verify that the machine and motor stop completely before cleaning the machine in order to prevent
accident caused by abrupt start of the machine or motor.
6. Be sure to turn the power off and verify that the machine and motor stop completely before carrying out
maintenance, inspection or repair of the machine. (For the machine with a clutch motor, the motor will
keep running for a while by inertia even after turning the power off. So, be careful.)
7. If the machine cannot be normally operated after repair or adjustment, immediately stop operation and
contact JUKI or the distributor in your area for repair in order to prevent accident that can result in per-
sonal injury or death.
8. If the fuse has blown, be sure to turn the power off and eliminate the cause of blowing of the fuse and
replace the blown fuse with a new one in order to prevent accident that can result in personal injury or
death.
9. Be sure to periodically clean up the air vent of the fan and inspect the area around the wiring in order to
prevent re accident of the motor.
10. In order to prevent accidents resulting in personal injury or death, adjustments have to be carried out
within the instructions described in this Engineer's Manual and in the Instruction Manual by the person-
nel who have been well trained by the employer with respect to the latest knowledge and safety for the
machine.
11. Make sure that water is contained in cylinders and pipes, then remove water from them in order to pre-
vent accidents due to a malfunction of the machine.
Operating environment
1. Be sure to use the machine under the environment which is not affected by strong noise source (electro-
magnetic waves) such as a high-frequency welder in order to prevent accident caused by malfunction of
the machine.
2. Never operate the machine in any place where the voltage uctuates by more than "rated voltage ±10 %"
in order to prevent accident caused by malfunction of the machine.
3. Be sure to verify that the air-driven device such as an air cylinder operates at the specied air pressure
before using it in order to prevent accident caused by malfunction of the machine.
4. To use the machine with safety, be sure to use it under the environment which satises the following
conditions:
Ambient temperature during operation 5°C to 35°C
Relative humidity during operation 35 % to 85 %
5. Dew condensation can occur if bringing the machine suddenly from a cold environment to a warm one.
So, be sure to turn the power on after having waited for a sufcient period of time until there is no sign
of water droplet in order to prevent accident caused by breakage or malfunction of the electrical compo-
nents.
6. Be sure to stop operation when lightning ashes for the sake of safety and remove the power plug in
order to prevent accident caused by breakage or malfunction of the electrical components.
7. Depending on the radio wave signal condition, the machine may generate noise in the TV or radio. If this
occurs, use the TV or radio with kept well away from the machine.
8. In order to ensure the work environment, local laws and regulations in the country where the sewing
machine is installed shall be followed.
In the case the noise control is necessary, an ear protector or other protective gear should be worn ac-
cording to the applicable laws and regulations.
9. Disposal of products and packages and treatment of used lubricating oil should be carried out properly
according to the relevant laws of the country in which the sewing machine is used.

v
Transportation
1. Be sure to lift this machine with four or more workers and use a carriage for moving it in order to pre-
vent personal injury.
2. Be sure to take sufcient safety measures to prevent falling or dropping before lifting or moving the
machine in order to protect against accident that can result in personal injury or death.
3. Installation is described in the Instruction Manual. Be sure to fully understand the description before
putting the machine into operation.
Replacement of parts
1. In prevention of accident that can result in personal injury, be sure to carry out disassembly/assembly
work within the specied range given in this Engineer's Manual and in the Instruction Manual.
2. Turn OFF the power before starting the work in order to protect against accident that can result in per-
sonal injury.
If it is inevitable to carry out work with the power ON, utmost care should be taken to prevent from de-
pressing the foot pedal or pressing the start switch by mistake.
3. Be sure to carry out replacement work after having installed the machine in a stable state in order to
protect against accident that can result in personal injury.
In addition, be sure to select appropriate tools.
4. In prevention of accident that can result in personal injury, make sure, after the completion of adjust-
ment work, that neither screws nor nuts are loosened or come in contact with other parts.
5. Be sure to use JUKI genuine parts when replacing any of the machine parts.
JUKI assumes no responsibility for any accident caused by any part other than JUKI genuine one.
In addition, in the event you cannot replace parts within the specied range, immediately stop the re-
placement work and ask JUKI or distributor in your area for replacement of the parts.
Adjustment
1. Be sure to adjust according to the instructions given in this Engineer's Manual and in the Instruction
Manual in order to protect against accident that can result in personal injury.
2. Be sure to carry out replacement work after having installed the machine in a stable state in order to
protect against accident that can result in personal injury.
In addition, be sure to select appropriate tools.
3. In prevention of accident that can result in personal injury, make sure, after the completion of adjust-
ment work, that neither screws nor nuts are loosened or come in contact with other parts.
4. Turn OFF the power before starting the work in order to protect against accident that can result in per-
sonal injury.
If it is inevitable to carry out work with the power ON, utmost care should be taken to prevent from de-
pressing the foot pedal or pressing the start switch by mistake.
5. In prevention of accident that can result in personal injury or entanglement accident, be sure to ensure
safety at the time of test run. In addition, be sure to take care not to allow hair or cloths to come in con-
tact with the machine belt.
Disassembly/assembly
1. In prevention of accident that can result in personal injury, be sure to carry out disassembly/assembly
work within the specied range given in this Engineer's Manual and in the Instruction Manual.
2. Be sure to carry out replacement work after having installed the machine in a stable state in order to
protect against accident that can result in personal injury.
In addition, be sure to select appropriate tools.
3. In prevention of accident that can result in personal injury, make sure, after the completion of adjust-
ment work, that neither screws nor nuts are loosened or come in contact with other parts.
4. In prevention of accident that can result in personal injury, be sure to tighten screws and nuts in assem-
bly work with a specied torque, if specied, or with an appropriate torque, if not specied.
After the completion of assembly work, be sure to check that screws and nuts are not loosened before
starting test run.
5. In prevention of accident that can result in personal injury, be sure to check whether the direction of
rotation is correct at the time of test run.
6. In prevention of accident that can result in personal injury or entanglement accident, be sure to ensure
safety at the time of test run. In addition, be sure to take care not to allow hair or cloths to come in con-
tact with the machine belt.
PRECAUTIONS TO BE TAKEN IN VARIOUS OPERATION STAGES
Mechanical components
CAUTION

vi
Transportation
1. Be sure to lift this machine with four or more workers and use a carriage for moving it in order to pre-
vent personal injury.
2. Be sure to take sufcient safety measures to prevent falling or dropping before lifting or moving the
machine in order to protect against accident that can result in personal injury or death.
3. Installation is described in the Instruction Manual. Be sure to fully understand the description before
putting the machine into operation.
Replacement of parts
1. In prevention of accident caused by unfamiliarity with the machine or electrical-shock accident, be sure
to ask an electrical technician of your company or JUKI or distributor in your area for replacement of
electrical components.
2. When it is necessary to open the control box containing electrical parts, be sure to turn the power off
and wait for ve minutes or more before opening the cover in order to prevent accident caused by un-
familiarity with the machine or electrical-shock accident. In addition, do not carry out replacement work
with wet hands in order to prevent electrical-shock accident.
3. Be sure to replace parts according to the instructions given in this Engineer's Manual and in the Instruc-
tion Manual in order to protect against accident that can result in personal injury.
4. Be sure to carry out replacement work after having installed the machine in a stable state in order to
protect against accident that can result in personal injury.
In addition, be sure to select appropriate tools.
5. Make sure, after the completion of replacement work, that there is no loose soldering, no contact with
other parts, inadequate contact between connectors and receptacles, and loose screws/nuts in order to
protect against accident that can result in personal injury.
6. Make sure, after the completion of replacement work, that neither connectors nor cables are damaged,
slipped off or loosened in order to protect against accident that can result in personal injury.
It should be remembered that some parts have been factory-insulated with tubes or tapes, or oated
above the PWB for safety's sake. In addition, internal wiring has been factory-routed or -clamped in such
a way that it does not come close to high-voltage parts. Be sure to re-place those parts as they are at the
time of delivery.
7. Be sure to use JUKI genuine parts when replacing any of the machine parts.
JUKI assumes no responsibility for any accident caused by any part other than JUKI genuine one.
In addition, in the event you cannot replace parts within the specied range, immediately stop the re-
placement work and ask JUKI or distributor in your area for replacement of the parts.
8. If the fuse has blown, be sure to turn the power off and eliminate the cause of blowing of the fuse and
replace the blown fuse with a new one in order to prevent accident that can result in personal injury or
death.
Adjustment
1. In prevention of accident caused by unfamiliarity with the machine or electrical-shock accident, be sure
to ask an electrical technician of your company or JUKI or distributor in your area for adjustment of
electrical components.
2. When it is necessary to open the control box containing electrical parts, be sure to turn the power off
and wait for ve minutes or more before opening the cover in order to prevent accident caused by un-
familiarity with the machine or electrical-shock accident. In addition, do not carry out adjustment work
with wet hands in order to prevent electrical-shock accident.
3. In prevention of accident that can result in personal injury, adjust adjustment variable resistor or the like
installed on PWB within the specied range given in this Engineer's Manual and in the Instruction Manu-
al.
4. Be sure to carry out replacement work after having installed the machine in a stable state in order to
protect against accident that can result in personal injury.
In addition, be sure to select appropriate tools.
5. In prevention of accident that can result in personal injury, make sure, after the completion of adjust-
ment work, that neither screws nor nuts are loosened or come in contact with other parts.
6. Make sure, after the completion of replacement work, that neither connectors nor cables are damaged,
slipped off or loosened in order to protect against accident that can result in personal injury.
7. In prevention of accident that can result in personal injury or entanglement accident, be sure to ensure
safety at the time of test run. In addition, be sure to take care not to allow hair or cloths to come in con-
tact with the machine belt.
Disassembly/assembly
1. In prevention of accident that can result in personal injury, be sure to carry out disassembly/assembly
work within the specied range given in this Engineer's Manual and in the Instruction Manual.
PRECAUTIONS TO BE TAKEN IN VARIOUS OPERATION STAGES
Electrical components
CAUTION

vii
2. In prevention of accident caused by unfamiliarity with the machine or electrical-shock accident, be sure
to ask an electrical technician of your company or JUKI or distributor in your area for disassembly/as-
sembly of electrical components.
3. When it is necessary to open the control box containing electrical parts, be sure to turn the power off
and wait for ve minutes or more before opening the cover in order to prevent accident caused by unfa-
miliarity with the machine or electrical-shock accident. In addition, do not carry out disassembly/assem-
bly work with wet hands in order to prevent electrical-shock accident.
4. Be sure to carry out replacement work after having installed the machine in a stable state in order to
protect against accident that can result in personal injury.
In addition, be sure to select appropriate tools.
5. In prevention of accident that can result in personal injury, be sure to tighten screws and nuts in assem-
bly work with a specied torque, if specied, or with an appropriate torque, if not specied.
After the completion of assembly work, be sure to check that screws and nuts are not loosened before
starting test run.
6. In prevention of accident that can result in personal injury, make sure, after the completion of adjust-
ment work, that neither screws nor nuts are loosened or come in contact with other parts.
7. Make sure, after the completion of replacement work, that neither connectors nor cables are damaged,
slipped off or loosened in order to protect against accident that can result in personal injury.
It should be remembered that some parts have been factory-insulated with tubes or tapes, or oated
above the PWB for safety's sake. In addition, internal wiring has been factory-routed or -clamped in such
a way that it does not come close to high-voltage parts. Be sure to re-place those parts as they are at the
time of delivery.
8. In prevention of accident that can result in personal injury, be sure to check whether the direction of
rotation is correct at the time of test run.
9. In prevention of accident that can result in personal injury or entanglement accident, be sure to ensure
safety at the time of test run. In addition, be sure to take care not to allow hair or cloths to come in con-
tact with the machine belt.

viii
PRECAUTIONS TO BE TAKEN SO AS TO USE THE LU-2800
SERIES MORE SAFELY
DANGER
1. Keep your hands away from needle when you turn ON the power switch or while the
machine is in operation.
2. Do not put your ngers into the thread take-up cover while the machine is operating.
3. Turn OFF the power switch when tilting the machine head, or removing the belt cover
or the V belts.
4. During operation, be careful not to allow your or any other person’s head, hands or
clothes to come close to the handwheel, V belt and motor. Also, do not place anything
close to them.
5. Do not operate your machine with the belt cover and nger guard removed.
6. To avoid personal injury, be careful not to allow your ngers in the machine when tilt-
ing the machine head.
CAUTION
1. To ensure safety, never operate the machine with the ground wire for the power supply
removed.
2. When inserting/removing the power plug, the power switch has to be turned OFF in
advance.
3. In time of thunder and lightening, stop your work and disconnect the power plug from
the receptacle so as to ensure safety.
4. If the machine is suddenly moved from a cold place to a warm place, dew condensa-
tion may be observed. In this case, turn ON the power to the machine after you have
conrmed that there is no danger of water drops in the machine.
5. To prevent res, periodically draw out the power plug from the plug socket and clean
the root of the pins and the space between pins.
6. The hook rotates at a high speed while the machine is in operation.
To prevent possible injury to hands, be sure to keep your hands away from the vicinity
of the hook during operation. In addition, be sure to turn OFF the power to the ma-
chine when replacing the bobbin.
7. To avoid possible accidents due to abrupt start of the machine, be sure to turn OFF
the power to the machine.
8. Be careful of handling this product so as not to pour water or oil, shock by dropping,
and the like since this product is a precision instrument.
9. When tilting or returning the sewing machine to the home position, hold the upper
side of the machine head with both hands and perform the work quietly so that ngers
or the like are not caught in the machine.

ix
CAUTION BEFORE OPERATION
• Before you put the machine into operation for the rst time after the set-up, clean it thoroughly.
Remove all dust gathering during transportation and oil it well.
• Conrm that voltage has been correctly set.
Conrm that the power plug has been properly connected to the power supply.
• Never use the machine in the state where the voltage type is different from the designated one.
• The direction of normal rotation of the machine is counterclockwise as observed from the pulley
side.
Take care not to allow the machine to rotate in the reverse direction.
• Never operate the machine unless the machine head and the oil tank have been lled with oil.
• For a test run, remove the bobbin and the needle thread.
• For the rst month, decrease the sewing speed and run the sewing machine at a speed of 80% or
less of the maximum sewing speed. As to the maximum sewing speed, see “2.-(18) SEWING SPEED
TABLE”.
• Operate the handwheel after the machine has totally stopped.
WARNING :
To avoid malfunction and damage of the machine, conrm the following.

x
CONTENTS
1. Specications........................................ 1
2. Standard adjustment ............................ 4
(1) Needle entry position
(Standard gauge type) ............................. 4
(2) Needle entry position
(Europe gauge type) ................................ 6
(3) Height of the feed dog ............................. 8
(4) Height of the hook.................................... 8
(5) Adjusting the opener ............................. 10
1) Clearance of opener .................................... 10
2) Opener timing .............................................. 12
(6) Needle-to-hook timing ........................... 14
1) Height of the needle bar.............................. 14
2) Needle-to-blade point of hook timing ........ 14
3) Adjusting the hook needle guard............... 14
(7) Lift of the presser foot ........................... 16
1) Hand lifter..................................................... 16
2) Knee lifter (Without thread trimmer only) ... 18
3) Automatic presser foot lifter
(Machine with thread trimmer only)........... 20
(8) Feed adjustment..................................... 22
1) Horizontal feed cam timing......................... 22
2) Vertical feed cam timing ............................. 22
3) Alternate momentum................................... 24
4) Top feed cam timing .................................... 24
(9) Needle sway
(Adjusting the bottom feed amount) .... 26
(10) Stitch length of forward/reverse feed... 28
(11) Position of the reverse feed
control lever............................................ 30
(12) Safety clutch........................................... 32
(13) Balancer .................................................. 34
(14) Reverse feed cylinder ............................ 36
(15) Lubrication.............................................. 40
(16) Thread trimmer device
(Except for LU-2828-6 and 2828-7) ....... 42
1) Position of the counter knife
and the clamp spring .................................. 42
2) Position of the counter knife base............. 44
3) Vertical position of the moving knife......... 46
4) Thread trimmer cam timing ........................ 48
5) Position of the thread trimmer cam ........... 50
6) Adjusting the knife pressure ...................... 50
(17) Adjusting the thread trimmer compo-
nents for LU-2828-6 and 2828-7 ............ 52
1) Adjusting the moving knife, the counter
knife and the bobbin thread clamp ............ 52
2) Adjusting the thread trimmer cam timing ... 54
(18) Detection switch of the amount of
alternate vertical movement.................. 56
(19) DL device ................................................ 58
(20) Adjusting the bottom feed momentum ... 60
(21) 2P feed adjustment ................................ 62
1) LU-2810-6, 2810-7, 2860-6, 2860-7.............. 62
2) LU-2828-6, 2828-7 ........................................ 64
3) LU-2818-7, 2868-7 ........................................ 66
(22) Replacing the motor .............................. 70
(23) Adjusting the condensation stitch
(LU-2828-6, 2828-7) ................................ 72
(24) Condensation cylinder
(LU-2818-7, 2868-7) ................................ 72
3. Portion to which LOCKTITE is
applied.................................................. 74
4. Selective parts and consumable
parts ..................................................... 75
5. Applying grease .................................. 77
(1) Applying grease ..................................... 77
(2) Greasing points...................................... 77
1) Needle bar rocking base ............................. 77
2) Alternate vertical change base................... 78
3) Horizontal feed change base...................... 78
4) Greasing point indication drawing
(* Indicating the points where grease is
applied at shipment.)................................... 79
6. Engraved marker dots on the hand-
wheel (for the machine with thread
trimmer only) ....................................... 99
7. Machine head wiring......................... 100
(1) LU-2810-7, 2860-7................................. 100
1) Connectors coming from machine head
(Connect to control box)........................... 100
2) Connectors that are connected
in the head cover ....................................... 101
(2) LU-2810-6, 2860-6................................. 101
1) Wiring diagram .......................................... 101
2) Details of connectors ................................ 102
(3) LU-2828-7 .............................................. 105
1) Connectors coming from machine head
(Connect to control box)........................... 105
2) Connectors that are connected
in the head cover ....................................... 106
(4) LU-2828-6 .............................................. 106
1) Wiring diagram .......................................... 106
2) Details of connectors ................................ 107
(5) LU-2818-7, 2868-7................................. 110
1) Connectors coming from machine head
(Connect to control box)........................... 110
2) Connectors that are connected
in the head cover ........................................111
8. Troubles and corrective measures...112
(1) With regard to sewing.......................... 112
(2) With regard to thread trimming........... 117
9. Lubrication route diagram................ 123
(1) LU-2810, 2810-6, 2810-7, 2828-6,
2828-7, 2818-7....................................... 123
(2) LU-2860, 2860-6, 2860-7, 2868-7.......... 124
10. Drawing of table ................................ 125
(1) For without thread trimming
(LU-2810, 2860)..................................... 125
(2) For SC-922 (LU-2810-7, 2860-7) .......... 126
(3) For V-belt (Machine with thread
trimmer) (LU-2810-6, 2860-6)............... 127
(4) For SC-922 (LU-2810-7, 2860-7,
2828-7, 2818-7, 2868-7) ........................ 128
(5) For V-belt (Machine with thread
trimmer) (LU-2810-6, 2860-6, 2828-6) ... 129

– 1 –
1. Specications
No. Item Application
1 Model LU-2810S (Standard gauge type)
LU-2810A (Europe gauge type)
LU-2810S-6 (Standard gauge type)
LU-2810A-6 (Europe gauge type)
LU-2810S-7 (Standard gauge type)
LU-2810A-7 (Europe gauge type)
2 Model name Direct-drive, 1-Needle, Unison-feed
Lockstitch Machine with a Vertical-
axis Large Hook
Direct-drive, 1-Needle, Unison-feed
Lockstitch Machine with a Vertical-
axis Large Hook with an Automatic
Thread Trimmer and V-belt
Direct-drive, 1-Needle, Unison-feed
Lockstitch Machine with a Vertical-
axis Large Hook with an Automatic
Thread Trimmer
3 Application For heavy-weight materials
4 Sewing speed Max. 3,000 sti/min (See “2.-(18) SEWING SPEED TABLE”.) *1
5 Needle GROZ-BECKERT 135 x 17 (Nm 125 to Nm 180) (Standard : Nm 160)
6 Applicable thread
size for sewing
#30 to #5 (US : #46 to #138, Europe : 20/3 to 60/3)
7 Applicable thread
size to be cut
#30 to #5 (US : #46 to #138, Europe : 20/3 to 60/3)
8 Stitch length Max. 9 mm (forward/reverse feed)
9 Stitch length dial 1-pitch dial 2-pitch dial
10 Presser foot lift Hand lifter : 10 mm
Knee lifter : 20 mm *2
Hand lifter : 10 mm
Automatic presser foot lifter : 20 mm *2
11 Stitch length
adjusting
mechanism
By dial
12 Reverse stitch
adjusting method
By lever Air cylinder type (with touch-back switch)
13 Thread take-up Link thread take-up
14 Needle bar stroke 40 mm
15 Amount of the
alternate vertical
movement
1 mm to 9 mm (6.5 mm at the time of delivery) *2
Alternate vertical dial adjustment type
16 Hook Full-rotary vertical-axis 2-fold hook (Latch type)
17 Feed mechanism Box feed
18 Top and bottom
feed actuation
mechanism
Timing belt
19 Thread trimming
method
Cam-driven scissors type
20 Lubrication Automatic lubrication by oil tank (with oil gauge)
21 Lubricating oil JUKI New Defrix Oil No. 1 (equivalent to ISO standard VG7) or JUKI MACHINE OIL No. 7
22 Bed size 643 mm × 178 mm
23 Space under the
arm
347 mm × 127 mm
24 Hand wheel size V-belt effective diameter : ø76.0 mm
Outer diameter : ø140 mm
V-belt effective diameter : ø76.0 mm
Outer diameter : ø123 mm
Outer diameter : ø123 mm
25 Motor/Control box M51N 750W SC-922
26 Machine head
weight
56 kg 61 kg 61 kg
27 Rated power
consumption
120 VA 110 VA
28 Noise - Equivalent continuous emission sound pressure level (LpA) at the workstation:
A-weighted value of 83.0 dB; (Includes KpA = 2.5 dB); according to ISO 10821- C.6.2 - ISO 11204 GR2 at 3,000
sti/min.
- Sound power level (LWA);
A-weighted value of 88.5 dB; (Includes KWA = 2.5 dB); according to ISO 10821- C.6.2 - ISO 3744 GR2 at 3,000
sti/min.
*1 For the LU-2810-7, the sewing speed is automatically set according to the amount of the alternate vertical
movement.
*2 To use the machine with amount of the alternate vertical movement is set at more than 6.5 mm, use it to lower
the presser foot lift (20mm).

– 2 –
No. Item Application
1 Model LU-2860S (Standard gauge type)
LU-2860A (Europe gauge type)
LU-2860S-6 (Standard gauge type)
LU-2860A-6 (Europe gauge type)
LU-2860S-7 (Standard gauge type)
LU-2860A-7 (Europe gauge type)
2 Model name Direct-drive, 2-Needle, Unison-feed
Lockstitch Machine with a Vertical-
axis Large Hook
Direct-drive, 2-Needle, Unison-feed
Lockstitch Machine with a Vertical-
axis Large Hook with an Automatic
Thread Trimmer and V-belt
Direct-drive, 2-Needle, Unison-feed
Lockstitch Machine with a Vertical-
axis Large Hook with an Automatic
Thread Trimmer
3 Application For heavy-weight materials
4 Sewing speed Max. 2,700 sti/min (See “2.-(18) SEWING SPEED TABLE”.) *1
5 Needle GROZ-BECKERT 135 x 17 (Nm 125 to Nm 180) (Standard : Nm 160)
6 Applicable thread
size for sewing
#30 to #5 (US : #46 to #138, Europe : 20/3 to 60/3)
7 Applicable thread
size to be cut
#30 to #5 (US : #46 to #138, Europe : 20/3 to 60/3)
8 Stitch length Max. 9 mm (forward/reverse feed)
9 Stitch length dial 1-pitch dial 2-pitch dial
10 Presser foot lift Hand lifter : 10 mm
Knee lifter : 20 mm *2
Hand lifter : 10 mm
Automatic presser foot lifter : 20 mm *2
11 Stitch length
adjusting
mechanism
By dial
12 Reverse stitch
adjusting method
By lever Air cylinder type
(with touch-back switch)
13 Thread take-up Link thread take-up
14 Needle bar stroke 40 mm
15 Amount of the
alternate vertical
movement
1 mm to 9 mm (6.5 mm at the time of delivery) *2
Alternate vertical dial adjustment type
16 Hook Full-rotary vertical-axis 2-fold hook (Latch type)
17 Feed mechanism Box feed
18 Top and bottom
feed actuation
mechanism
Timing belt
19 Thread trimming
method
Cam-driven scissors type
20 Lubrication Automatic lubrication by oil tank (with oil gauge)
21 Lubricating oil JUKI New Defrix Oil No. 1 (equivalent to ISO standard VG7) or JUKI MACHINE OIL No. 7
22 Bed size 643 mm × 178 mm
23 Space under the
arm
347 mm × 127 mm
24 Hand wheel size V-belt effective diameter : ø76.0 mm
Outer diameter : ø140 mm
V-belt effective diameter : ø76.0 mm
Outer diameter : ø123 mm
Outer diameter : ø123 mm
25 Motor/Control box M51N 750W SC-922
26 Machine head
weight
61 kg 66 kg 66 kg
27 Rated power
consumption
95 VA 110 VA
28 Noise - Equivalent continuous emission sound pressure level (LpA) at the workstation:
A-weighted value of 83.0 dB; (Includes KpA = 2.5 dB); according to ISO 10821- C.6.2 - ISO 11204 GR2 at 2,700
sti/min.
- Sound power level (LWA);
A-weighted value of 88.5 dB; (Includes KWA = 2.5 dB); according to ISO 10821- C.6.2 - ISO 3744 GR2 at 2,700
sti/min.
*1 For the LU-2860-7, the sewing speed is automatically set according to the amount of the alternate vertical
movement.
*2 To use the machine with amount of the alternate vertical movement is set at more than 6.5 mm, use it to lower
the presser foot lift (20mm).

– 3 –
No. Item Application
1 Model LU-2828-7 LU-2828-6 LU-2818-7 LU-2868-7
2 Model name 1-needle, unison-feed,
lockstitch machine with
automatic thread trimmer
(with 2.7-fold vertical axis
hook / shorter-remaining-
thread / direct drive type)
(Europe gauge type only)
1-needle, unison-feed,
lockstitch machine with
automatic thread trimmer
(with 2.7-fold vertical axis
hook / shorter-remaining-
thread / V-belt type)
(Europe gauge type only)
1-needle, unison-feed,
lockstitch machine with
automatic thread trimmer
(with 2.7-fold vertical axis
hook / long pitch / shorter-
remaining-thread / direct
drive type)
(Europe gauge type only)
2-needle, unison-feed,
lockstitch machine with
automatic thread trimmer
(with 2.7-fold vertical axis
hook / long pitch / shorter-
remaining-thread / direct
drive type)
(Europe gauge type only)
3 Application Medium- to heavy-weight materials, car seat, furniture
4 Sewing speed *1 Max. 3,000 sti/min Max. 2,700 sti/min
(See “2.-(18) SEWING SPEED TABLE”.)
5 Needle SCHMETZ 134-35 (Nm 125 to Nm 180)
(Standard : Nm 140)
GROZ-BECKERT 135 x 17 (Nm 125 to Nm 180)
(Standard : Nm 160)
6 Applicable thread
size for sewing
#30 to #5 (US : #46 to #138, Europe : 20/3 to 60/3)
7 Applicable thread
size to be cut
#30 to #5 (US : #46 to #138, Europe : 20/3 to 60/3)
8 Stitch length Max. 9 mm (forward/reverse feed) Max. 12 mm (forward/reverse feed)
9 Stitch length dial 2-pitch dial
10 Presser foot lift Hand lifter : 10 mm, Knee lifter : 20 mm
11 Stitch length
adjusting
mechanism
By dial
12 Reverse stitch
adjusting method
Air cylinder type
(with touch-back switch)
13 Thread take-up Link thread take-up
14 Needle bar stroke 40 mm
15 Amount of the
alternate vertical
movement
1 mm to 9 mm (6.5 mm at the time of delivery)
Alternate vertical dial adjustment type
16 Needle thread
tension
Possible to changeover of single / double tension
17 Hook Full-rotary vertical-axis 2.7-fold hook (Latch type)
18 Feed mechanism Box feed
19 Top and bottom
feed actuation
mechanism
Timing belt
20 Thread trimming
method
Cam-driven scissors type
21 Lubrication Automatic lubrication by oil tank (with oil gauge)
22 Lubricating oil JUKI New Defrix Oil No. 1 (equivalent to ISO standard VG7) or JUKI MACHINE OIL No. 7
23 Bed size 643 mm × 178 mm
24 Space under the
arm
347 mm × 127 mm
25 Hand wheel size Outer diameter : ø123 mm V-belt effective diameter :
ø76.0 mm
Outer diameter : ø123 mm
Outer diameter : ø123 mm
26 Motor/Control box SC-922 SC-922
27 Machine head
weight
62 kg 66 kg 68.5 kg
28 Rated power
consumption
180 VA 120 VA 110 VA
29 Noise *2 - Equivalent continuous emission sound pressure level
(LpA) at the workstation:
A-weighted value of 81.0 dB; (Includes KpA = 2.5 dB);
according to ISO 10821- C.6.2 - ISO 11204 GR2 at
3,000 sti/min.
- Sound power level (LWA);
A-weighted value of 85.5 dB; (Includes KWA = 2.5 dB);
according to ISO 10821- C.6.2 - ISO 3744 GR2 at
3,000 sti/min.
- Equivalent continuous
emission sound pressure
level (LpA) at the
workstation:
A-weighted value of 84.0
dB; (Includes KpA = 2.5
dB); according to ISO
10821- C.6.2 - ISO 11204
GR2 at 2,750 sti/min.
- Sound power level (LWA);
A-weighted value of 84.0
dB; (Includes KWA = 2.5
dB); according to ISO
10821- C.6.2 - ISO 3744
GR2 at 3,000 sti/min.
- Equivalent continuous
emission sound pressure
level (LpA) at the
workstation:
A-weighted value of 84.0
dB; (Includes KpA = 2.5
dB); according to ISO
10821- C.6.2 - ISO 11204
GR2 at 2,600 sti/min.
- Sound power level (LWA);
A-weighted value of 84.0
dB; (Includes KWA = 2.5
dB); according to ISO
10821- C.6.2 - ISO 3744
GR2 at 2,700 sti/min.
*1 The speed setting according to the amount of the alternating vertical movement of the walking foot and
presser foot is automatically carried out.
*2 The noise level show in the table is the level generated in the case JUKI's control box (SC-922) is used.

– 4 –
2. Standard adjustment
(1) Needle entry position (Standard gauge type)
WARNING :
Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the
sewing machine.
Standard adjustment
Model Dimension E
(mm) Gauge type
LU-2810
7.5 ± 0.1 Standard
gauge type
LU-2810-6
LU-2810-7
LU-2860
LU-2860-6
LU-2860-7
[Conditions]
• Needle bar at lowest dead point
• Feed amount : 0 mm
• Height of feed dog : 0.5 to 0.6 mm
(Highest position)
❶
E
Top surface of ❸
❽
❼
❷
❻
❹
❺
❷
󱢳, 󱢴
❹
󱢳
󱢴
❷
❷
In case of 2-needle

– 5 –
Adjustment procedures Results of Improper adjustment
1. Set the feed pitch to the maximum (P=9).
2. Turn the handwheel to turn the feed base arm ❹in the direc-
tion of the arrow.
Make sure that a clearance is secured in the hexagonal hole in
clamping screw, right 󱢳of the feed base arm into which a tool
can be inserted.
3. Only loosen clamping screw, right 󱢳of the feed base arm.
4. Set the stitch dial to “0”. (Due to adjustment work of the initial
position of feed dog)
5. Turn the handwheel to bring the needle bar to the lowest dead
point of its stroke.
6. Loosen clamping screw ❶of the needle bar rocking link.
7. In the state that the presser foot is raised, adjust the clearance
between presser bar ❼and walking bar ❽to dimension E,
then securely tighten clamping screw ❶of the needle bar rock-
ing link.
8. Loosen clamping screw, left 󱢴of the feed base arm.
9. Move the feed base ❺to adjust so that needle ❻enters the
center of the needle hole in feed dog ❷. Then securely tighten
clamping screw, left 󱢴of the feed base arm. (a = a’)
10. Perform the adjustment work of step 1. to 2.
11. Tighten clamping screw, right 󱢳of the feed base arm.
12. Check to be sure that the lateral clearances of feed dog ❷in
terms of the window of throat plate ❸to almost equal values. (A
= B)
In case of 2-needle, check to be sure that A = B and C = D are
almost obtained.
[Checking method]
1. Set the stitch dial to the maximum.
2. Turn the handwheel and make sure that feed dog ❷does not
come in contact with the throat plate ❸at the position where
the feed dog ❷travels fully to the front or to the rear.
o
Stitch skipping or needle break-
age will result.
o
Poorly tensed stitches will result.

– 6 –
(2) Needle entry position (Europe gauge type)
WARNING :
Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the
sewing machine.
Standard adjustment
Model
group Model Dimension E (mm) Gauge type
Z
LU-2810
5.7 ± 0.2 Europe
gauge type
LU-2810-6
LU-2810-7
LU-2860
LU-2860-6
LU-2860-7
YLU-2828-6
LU-2828-7
XLU-2818-7 9.8 ± 0.1
LU-2868-7
[Conditions]
• Needle bar at lowest dead point
• Feed amount : 0 mm
• Height of feed dog : 0.5 to 0.6 mm (Highest
position)
❷
❻
❶
❹
E❸
❷
Operator's side
󱢴
󱢳
❷
❷
In case of 2-needle
❹
󱢳
󱢴
E
Top surface of ❸
❽
❼
❹
❺
❷
󱢳, 󱢴
Model group Z, YModel group X

– 7 –
Adjustment procedures Results of Improper adjustment
1. Set the feed pitch to the maximum.
2. Turn the handwheel to turn the feed base arm ❹in the direc-
tion of the arrow.
Make sure that a clearance is secured in the hexagonal hole in
clamping screw, right 󱢳of the feed base arm into which a tool
can be inserted.
3. Only loosen clamping screw, right 󱢳of the feed base arm.
4. Set the stitch dial to “0”. (Due to adjustment work of the initial
position of feed dog)
5. Turn the handwheel to bring the needle bar to the lowest dead
point of its stroke.
------------------------------------------------------------------------------------------
[Model group Z, Y]
6. Loosen clamping screw, left 󱢴of the feed base arm.
7. Adjust the clearance between throat plate ❸and feed dog ❷
to dimension E, then securely tighten clamping screw, left 󱢴of
the feed base arm.
8. Loosen clamping screw ❶of the needle bar rocking link.
9. Move the needle bar rocking base to adjust so that needle ❻
enters the center of the needle hole in feed dog ❷. Then se-
curely tighten clamping screw ❶of the needle bar rocking link.
(a = a’)
[Model group X]
6. Loosen clamping screw ❶of the needle bar rocking link.
7. In the state that the presser foot is raised, adjust the clearance
between presser bar ❼and walking bar ❽to dimension E,
then securely tighten clamping screw ❶of the needle bar rock-
ing link.
8. Loosen clamping screw, left 󱢴of the feed base arm.
9. Move the feed base ❺to adjust so that needle ❻enters the
center of the needle hole in feed dog ❷. Then securely tighten
clamping screw, left 󱢴of the feed base arm. (a = a’)
------------------------------------------------------------------------------------------
10. Perform the adjustment work of step 1. to 2.
11. Tighten clamping screw, right 󱢳of the feed base arm.
12. Check to be sure that the lateral clearances of feed dog ❷in
terms of the window of throat plate ❸to almost equal values. (A
= B)
In case of 2-needle, check to be sure that A = B and C = D are
almost obtained.
[Checking method]
1. Set the stitch dial to the maximum.
2. Turn the handwheel and make sure that feed dog ❷does not
come in contact with the throat plate ❸at the position where
the feed dog ❷travels fully to the front or to the rear.
o
Stitch skipping or needle break-
age will result.
o
Poorly tensed stitches will result.

– 8 –
(3) Height of the feed dog
WARNING :
Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the
sewing machine.
Standard adjustment
(4) Height of the hook
WARNING :
Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the
sewing machine.
Standard adjustment
❶
❸
❷
A
Top surface of ❹
❸
❹
Model Dimension A
(mm)
LU-2810
0.5 to 0.6
LU-2810-6
LU-2810-7
LU-2860
LU-2860-6
LU-2860-7
LU-2828-6
LU-2828-7
LU-2818-7
LU-2868-7
[Conditions]
• Feed amount : 0 mm
• Height of feed dog : maximum
Model Dimension A
(mm)
LU-2810 1 ± 0.1
LU-2810-6 1.5 ± 0.1
LU-2810-7
LU-2860 1 ± 0.1
LU-2860-6
1.5 ± 0.1
LU-2860-7
LU-2828-6
LU-2828-7
LU-2818-7
LU-2868-7
❷
A
❶
❹
❷
❺
❼
❸
❻