Nitto Kohki LO-3550 User manual

The specifications and configurations contained in this document are subject to
change without prior notice due to improvements we are making day in, day out.
Manufactured by :
NITTO KOHKI Co., Ltd.
2-9-4, Nakaikegami, Ohta-ku,
Tokyo, 146-8555, Japan
TEL : [phone]
FAX : [phone]
E-mail : [email protected]
URL : www.nitto-kohki.co.jp
Keep the manual handy – so you can use it whenever necessary.
PORTABLE MAGNETIC DRILLING MACHINE
Read this manual carefully before operating your Nitto Kohki Portable
Magnetic Drilling Machine. Keep this manual with your machine. All users
of the Nitto Kohki Portable Magnetic Drilling Machine must read this
manual.
ATRA ACE Model LO-3550
Professional Tool For One-Touch Type Annular Cutter Only
(Side-Lock Type Annular Cutter cannot be used.)
Specifications
Model LO-3550
Drill Motor
Power Supply (Single Phase) 220-240 V 〜50/60 Hz
Rated Power Consumption 800 W
Rated Current 3.3 A
No-load Speed 950 min
Magnet Power Consumption 35 W
Drilling Capability JETBROACH One-touch type Hole diameter: 12 mm to35 mm dia.
Plate thickness: MAX. 50 mm
Max Magnetic Force 5500 N
Magnet Size 65 mm × 145 mm
Weight 8.7 kg
(Cord and Sub handle are not included.)
Original Instruction

1
The following Safety notations are used throughout the manual to highlight safety precautions for the user and for
the machine.
DANGER: Indicates an imminently hazardous situation which, if not avoided by following the
instructions given, will result in death or serious injury.
WARNING: Indicates a potentially hazardous situation which, if not avoided by following the
instructions given, could result in death or serious injury.
CAUTION: Indicates a potentially hazardous situation which, if not avoided by following the
instructions given, could result in injury or material damage.
Caution: Important precautions for machine or tool setup, operation and maintenance.
Thank you very much for your
purchase of this Nitto Kohki product.
Before using your machine, please
read this manual carefully so that you
may use it properly to get the most
out of it.
Please keep the manual handy - so
you can use it whenever necessary.
CONTENTS page
GENERAL SAFETY RULES ………………………………… 2
GENERAL POWER TOOL SAFETY WARNINGS ………… 3
POWER TOOL SAFETY……………………………………… 5
ABOUT YOUR NITTO PORTABLE MAGNETIC
DRILLING MACHINE ………………………………………… 5
1. APPLICATION
…………………………………………… 8
2. RECEIVING INSPECTION ……………………………… 8
3. PART NAMES …………………………………………… 9
4. FUNCTIONS OF ELECTRONIC CONTROL ……… 10
5. MACHINE SETUP …………………………………… 10
6. MACHINE OPERATION ……………………………… 14
7. TROUBLESHOOTING
……………………………… 17
8. MAINTENANCE/SERVICE
…………………………… 18
9. OPTIONAL PARTS …………………………………… 19
10. ATRA ACE LO-3550 MOTOR ASSEMBLY
AND PARTS LIST …………………………………… 21
11. ORDERING PARTS …………………………………… 22
PICTOGRAM
Warning: It might be dangerous to operate the
machine if the instructions supplied are not followed.
Do not allow the main body or the power source to get
wet as it will cause electric shock and leakage.
Using this machine improperly could result in serious
injury. Read the instruction manual before use.
Always wear suitable eye protection.
Always wear suitable hearing protection.
Always wear respiratory protective equipment (PPE).
●Sound pressure level(LpA)= 85dB(A) according to EN 60745.
●Sound Power Level(LwA)= 96dB(A) according to EN 60745.
●Uncertainty K=1.2 dB(A)
Vibration total values (triax vector sum) determined
according to EN 60745:
●Vibration emission value ah=32m/s2
●Uncertainty K=2.2m/s2
●Operating Temperature : 5℃〜40℃
●Operating Humidity : Maximum 90% at 25℃
●Altitude : 1000m Max.
・English :Please ask your dealer or
distributor for instruction manual
in local language(s).
・German :Bitte fragen Sie lhren Händler
nach eine Betriebsanleitung in
Landessprache.
・French :S'il vous plait, veuillez demandez
á votre foumisseur de manuel
instruction en langue locale.
・Spanish :Por favor, cantacte con su
distribuidor para el manual de
instrucciones en español.
・Portuguese :Por favor pessa ao seo agente
ou distribuidor o manual de
instrucces ih linguagen local.
・Italian :Per Manuale lstruzioni in lingua
locale Vi preghiamo di rivolgervi
al rivenditore o distributore.
・Dutch :Vraag uw handelaar
om een nederladstalige
gebruiksaanwijzing.
・Swedish :Be er lokala Åtreförsäljare eller
distributör om manualer pá
svenska.
・Danish :Venligst henvend Dem til den
danske distributør for instructions
manualer.
・Polish :Prosze pytac swojego dealera
lub dystrybutora o instrukcje
obslugi w jezyku localnym.
・中文 :請向當地供應商或経銷商詢問中
文使用説明書

2
GENERAL SAFETY RULES
WARNING
TO OPERATORS
Always Wear Proper Clothing
●Do not wear loose clothing. Loose clothing can
become caught in the drilling machine. This could
cause severe injuries. Be careful that loose clothing
does not come into contact with the machine.
●Wear non-skid footwear. If you lose your footing,
you could contact moving portions of the machine.
This could cause severe injuries. Always wear non-
skid footwear and remain balanced when using the
drilling machine.
●Be careful of long hair. Wear a hat or a hair net to
contain long hair. Long hair can become caught in
the drilling machine. This will cause severe injuries.
Be careful that long hair does not come into contact
with the drilling machine.
Always Wear Suitable Eye Protection
●Always wear suitable eye protection. The operation
of your drilling machine will cause flying chips and
particles. These will cause severe eye injuries. You
must always wear suitable eye protection.
●Not all glasses are suitable eye protection. Wear
only suitable eye protection that comply with ANSI
standards. Not all of the lenses are shock resistant.
Ordinary glasses will not provide sufficient eye
protection.
Glasses only for visual correction are not appropriate
to be used as safety glasses.
Always Wear Suitable Hearing Protection
●Always wear suitable hearing protection. The
operation of your drilling machine will cause big
sound occurs. These will cause severe hearing loss
injuries. You must always wear suitable hearing
protection.
Always Wear respiratory protective equipment (PPE)
●Always Wear respiratory protective equipment
(PPE) when working in an environment where dust
particles are generated in operation.
Maintain Good Posture
●Always wear non-skid footwear and maintain good
posture. Do not use the drilling machine when you
are tired. Fatigue or loss of balance could cause
you to lose control of the machine. This could cause
severe injuries. Always stay balanced. Always keep
good posture. Stop using the machine if you are tired.
Never Touch the Cutting Tip
●Never touch the moving or cutting tip. Contact with
the moving tip will cause severe injuries. Always
keep all parts of your body away from the cutting tip.
Always keep your hand and clothing away from the
cutting tip.
ABOUT THE WORK AREA
Keep Work Area Clean
●Always keep your work area clean. Cluttered work
areas cause accidents. Always keep clear of other
objects.
●Never use the magnetic drilling machine when it is
wet. Always use the drilling machine in a dry area.
Do not use the drilling machine in the rain. If you
use the machine when it is wet you can get electric
shock. If you use the machine in the rain you can
get an electric shock.
●Always use the drilling machine in a well-lighted
area. Do not use the drilling machine in the dark.
●Avoid all flammable materials. Use of the drilling
machine may cause a spark that could ignite a fire
or an explosion. Never use the machine near any
flammable material.
●Keep away from children. Always keep the drilling
machine away from children. Do not operate drilling
machine when children are present.
BEFORE OPERATION
Make sure that all parts are free from damage
●Make sure that the drilling machine is in good
operating condition. Operation of a damaged
machine could result in severe injuries. If there
is any damage to the machine, do not use the
machine. If there is any damage to the machine,
take it to an authorized Nitto dealer for repair.
●Do not attempt service or repair of the drilling
machine. All service or repair should be done by an
authorized Nitto dealer.
When a failure is observed with the switch, request
for repair to the sales agent where the product was
purchased or your nearest authorized Nitto dealer.
Do not use the machine that cannot be started or
stopped by the start switch.
When a damage is observed with the power cord,
request for repair to the sales agent where the
product was purchased or your nearest authorized
Nitto dealer.
Secure Your Work
●Always secure your work piece. Improperly mounted
work can become loose. This can cause severe
injuries. Always secure all work.
●Always use a vice or a clamp. Do not attempt to
hold any work piece with your hand. Attempting to
hold a work piece with your hand may cause severe
injuries. Always use a vice or clamp to hold the work
piece.

3
●Always secure your drilling machine. Improperly
mounted drilling machine can come loose. This can
cause severe injuries. Always secure the drilling
machine.
Avoid Clutter
●Always stay clear of other objects. Cluttered work
areas cause accidents. Always keep a clean work
area and stay away from other objects.
Always Remove Spanner Wrenches and
Adjustment Tools
●Always remove spanner wrenches and adjustment
tools after adjustments have been made to the
drilling machine. Always remove all adjustment tools
before using the drilling machine.
Always Use a Cutter that is Appropriate for Your
Work
●Always use a Cutter that is appropriate for your
work. Avoid heavy-duty work that is the beyond the
capacity of your drilling machine. If the work exceeds
the capacity of your drilling machine, this can cause
accidents and severe injuries. Always use the
drilling machine in accordance with its performance
specifications.
SAFE HANDLING
●Never leave the magnetic drilling machine
unattended while it is running. When the machine
is unattended, disconnect the power source. Do
not leave the work area until the machine comes to
a complete stop. Operating the machine while it is
unattended can case accidents that may result in
severe injuries.
HOW TO STORE YOUR MAGNETIC DRILLING
MACHINE
●Always store the machine in a dry area.
●Always keep the machine out of the reach of
children.
HOW TO CARRY YOUR MAGNETIC DRILLING
MACHINE
●Disconnect the power and turn off the machine
whenever you carry the machine.
●Pay attention when carrying the machine.
Keep your hands away from the start switch when
carrying the machine.
Do not hold parts other than the handle to carry the
machine.
MAINTENANCE
Do not take apart or modify your magnetic drilling
machine.
●Do not attempt to disassemble or modify your
magnetic drilling machine.
●Do not modify your magnetic drilling machine.
Modifications can cause accident and severe
injuries.
●All service and repairs must be performed by an
authorized Nitto dealer. Any attempt to service or
repair the machine yourself may result in an accident
and severe injuries.
Check all Parts for Damage.
●Always inspect the magnetic drilling machine before
use.
●Always check that the pilot pin and cutter are in
good condition. Use of the machine with worn pilot
pins or worn cutter can cause accidents and severe
injuries.
●Inspect all cutter before you put them on the
magnetic drilling machine.
●Do not operate the magnetic drilling machine with a
damaged or worn cutter. Do not operate the machine
with a damaged or worn pilot pin. Do not operate the
machine with any damaged accessory. Operating
the machine with any damaged part or accessory
can cause accidents and severe injuries. If there is
any damage to the magnetic drilling machine do not
operate the machine. Take it to an authorized Nitto
Dealer for repair.
●Always have the magnetic drilling machine repaired
at an authorized Nitto dealer. Always take the
magnetic drilling machine to an authorized Nitto
dealer for service, repair and replacement parts. If
you cannot locate an authorized Nitto dealer near
you, please contact your sales representative.
●Always use Nitto genuine parts. The use of improper
or non-Nitto parts can cause accidents and severe
injuries. Never use unauthorized parts. To obtain
genuine Nitto parts, contact your sales agent.
●Do not remove any nameplate from your magnetic
drilling machine. Do not remove any labels from
your magnetic drilling machine. If any label or
nameplate is damaged contact your sales agent for
a replacement.
●When a damage is observed with the power cord,
request for replacement at your nearest authorized
Nitto dealer to avoid accidents.
GENERAL POWER TOOL SAFETY WARNINGS
WARNING
●Read all safety warnings and all instructions.
Failure to follow the warnings and instructions may
result in electric shock, fire and/or serious injury.
●Save all warnings and instructions for future
reference.
●The term "power tool" in the warnings refers to your

4
mains-operated power tool.
<Work area safety>
●Keep work area clean and well lit. Cluttered or
dark areas invite accidents.
●Do not operate power tools in explosive
atmospheres, such as in the presence of
flammable liquids, gases or dust. Power tools
create sparks which may ignite the dust or
fumes.
●Keep children and bystanders away while
operating a power tool. Distractions can cause you
to lose control.
<Electric safety>
●Power tool plugs must match the outlet. Never
modify the plug in any way. Do not use any
adapter plugs with earthed (grounded) power
tools. Unmodified plugs and matching outlets will
reduce risk of electric shock.
●Avoid body contact with earthed or grounded
surfaces, such as pipes, radiators, ranges and
refrigerators. There is an increased risk of electric
shock if your body is earthed or grounded.
●Do not expose power tools to rain or wet
conditions. Water entering a power tool will
increase the risk of electric shock.
●Do not abuse the cord. Never use the cord for
carrying, pulling or unplugging the power tool.
Keep cord away from heat, oil, sharp edges
or moving parts. Damaged or entangled cords
increase the risk of electric shock.
●When operating a power tool outdoors, use an
extension cord suitable for outdoor use. Use of
a cord suitable for outdoor use reduces the risk of
electric shock.
●If operating a power tool in a damp location is
unavoidable, use a residual current device (RCD)
protected supply. Use of an RCD reduces the risk
of electric shock.
<Personal safety>
●Stay alert, watch what you are doing and use
common sense when operating a power tool. Do
not use a power tool while you are tired or under
the influence of drugs, alcohol or medication. A
moment of inattention while operating power tools
may result in serious personal injury.
●Use personal protective equipment. Always wear
eye protection. Protective equipment such as dust
mask, non-skid safety shoes, hard hat, or hearing
protection used for appropriate conditions will
reduce personal injuries.
●Prevent unintentional starting. Ensure the
switch is in the off-position before connecting
to power source and/or battery pack, picking up
or carrying the tool. Carrying power tools with your
finger on the switch or energising power tools that
have the switch on invites accidents.
●Remove any adjusting key or wrench before
turning the power tool on. A wrench or a key left
attached to a rotating part of the power tool may
result in personal injury.
●Do not overreach. Keep proper footing and
balance at all times. This enables better control of
the power tool in unexpected situations.
●Dress properly. Do not wear loose clothing or
jewellery. Keep your hair, clothing and gloves
away from moving parts. Loose clothes, jewellery
or long hair can be caught in moving parts.
●If devices are provided for the connection of
dust extraction and collection acilities, ensure
these are connected and properly used. Use of
dust collection can reduce dust-related hazards.
<Power tool use and care>
●Do not force the power tool. Use the correct
power tool for your application. The correct power
tool will do the job better and safer at the rate for
which it was designed.
●Do not use the power tool if the switch does not
turn it on and off. Any power tool that cannot be
controlled with the switch is dangerous and must be
repaired.
●Disconnect the plug from the power source from
the power tool before making any adjustments,
changing accessories, or storing power tools.
Such preventive safety measures reduce the risk of
starting the power tool accidentally.
●Store idle power tools out of the reach of
children and do not allow persons unfamiliar
with the power tool or these instructions to
operate the power tool. Power tools are dangerous
in the hands of untrained users.
●Maintain power tools. Check for misalignment or
binding of moving parts, breakage of parts and
any other condition that may affect the power
tool’s operation. If damaged, have the power tool
repaired before use. Many accidents are caused
by poorly maintained power tools.
●Keep cutting tools sharp and clean. Properly
maintained cutting tools with sharp cutting edges are
less likely to bind and are easier to control.
●Use the power tool, accessories and tool bits
etc. in accordance with these instructions,
taking into account the working conditions and

5
the work to be performed. Use of the power tool
for operations different from those intended could
result in a hazardous situation.
<Service>
●Have your power tool serviced by a qualified
repair person using only identical replacement
parts. This will ensure that the safety of the power
tool is maintained.
●Hold power tool by insulated gripping surface,
when performing an operation where the cutting
accessory may contact hidden wiring. Cutting
accessory contacting a “live” wire may make
exposed metal parts of the power tool “live” and
could give the operator an electric shock.
Drill safety warnings
- Wear ear protectors when impact drilling.
Exposure to noise can cause hearing loss.
- Use auxiliary handle(s), if supplied with the tool.
Loss of control can cause personal injury.
POWER TOOL SAFETY
WARNING
●Always make sure that the machine is properly
grounded. If the machine is not properly grounded,
someone can get an electric shock.
●If you have any doubt about the grounding of
the magnetic drilling machine, contact a licensed
electrician.
●Never connect the grounding conductor to a gas
pipe. This will result in an explosion and severe
injuries or death.
●Always check the grounding conductor. If you have
any doubts about the grounding conductor contact a
licensed electrician.
●Wiring connections to a grounding rod require the
expertise of a licensed electrician. Do not attempt
the wire connections yourself. Always contact a
licensed electrician.
●Do not abuse the power cord. A damaged power
cord can cause an electrocution. A damaged power
cord can cause fires. Always inspect the cord. If the
cord is damaged, do not use the magnetic drilling
machine.
●Do not carry the machine by the cord. Do not pull
the cord to disconnect it from a socket.
●The cord can become damaged from heat, contact
with sharp objects or from being twisted. Always
inspect the cord. Do not use the machine if the cord
is damaged.
●Always use a ground fault circuit interrupter. The use
of a ground fault circuit interrupter may be required
by government regulations. The failure to use a
ground fault circuit interrupter may result in electric
shock.
●Avoid starting the magnetic drilling machine abruptly
or unintentionally.
●Always make sure that the switch is turned off before
connecting the power source.
●Always disconnect the power source and turn off
the switch before setting up for work operations.
Always disconnect the power and turn off the
switch when inspecting work. Always disconnect
the power and turn off the switch before attempting
any maintenance. Failure to disconnect the power
and turn off the switch during set up, inspection
or maintenance can cause accidents and severe
injuries.
ABOUT YOUR NITTO PORTABLE
MAGNETIC DRILLING MACHINE
DANGER
Do not use your portable drilling machine on the
ceiling.
●Use of the portable drilling machine on the ceiling
is dangerous. The machine could fall. The falling
machine could cause severe injuries or death.
WARNING
Do not use the Magnet for more than five hours.
●More than five hours of uninterrupted operation may
cause a fire. Five hours of uninterrupted operation
generates extreme heat in the Magnet. This heat
can cause a fire. Do not touch the Magnet. When
the Magnet is hot, touching it will cause a severe
burn injury. Never use the Magnet for more than
five continuous hours. When you are not using the
Magnet, turn the switch to the OFF position and pull
the Plug out of the power source.
Do not use the Drill Motor for over 30 minutes.
●Uninterrupted operation of the Drill Motor for over 30
minutes generates heat. This heat can cause a fire.
Never use the Drill Motor for over 30 minutes. When
you are not using the Drill Motor, turn the switch to
the OFF position and pull the Plug from the power
source.
Use only on magnetic materials.
●Your portable drilling machine cannot be used
on non-magnetic materials, such as aluminum,

6
stainless steel, copper or alloys. The Magnet will not
work on non-magnetic materials. Attempting to use
the Magnet on non-magnetic materials could cause
an accident.
Use caution during wall operation.
●When using your portable magnetic drilling machine
on a magnetic wall, always use caution.
●Never stand under the machine.
* Never allow anyone to stand under the machine.
* Never put any part of your body under the
machine.
* If the machine falls, it could result in severe injury
or death.
●Always remove Cutting Oil from the Tank before
using the machine on a wall. You must manually
apply Cutting Oil to the cutting tool.
Always use a work piece that is at least 6 mm thick.
●The work piece must be at least 6 mm thick. If a
work piece is too thin, the magnetic power of your
machine will decrease. This will cause the machine
to move during operation. This could result in an
accident.
6 mm or more
Fig. 1
Use an iron back-up plate.
●If the work piece is less than 6 mm thick, you must
use an iron back-up plate that is more than 7 mm
in thickness. The surface area of the iron back-up
plate must he greater than the surface area of the
magnet. An appropriate back-up plate is necessary
to boost the holding power of the Magnet.
Use of an inappropriate back-up plate can result in
an accident, If the back-up plate is not thick enough
or big enough, the machine will come loose during
operation. This can result in an accident and severe
injuries.
Less than 6 mm Place an iron back-up plate of 7 mm or thicker
Fig. 2
Always keep surfaces clean.
●Always keep the Magnet surface clean. Always keep
the work piece surface clean. If there are any foreign
objects between the Magnet and the work piece
surfaces, this will reduce magnetic power. This could
cause the machine to move during operation. This
can result in an accident. Keep all surfaces clean of
rust, chips or other foreign material.
Do not place the machine over a hole.
●Do not attempt to position the Magnet over a hole.
Attempting to straddle a hole will reduce the power
of the Magnet. This will cause the work piece to
come loose during operation and can cause an
accident.
Use the accessory safety strap to prevent the unit
from falling off.
●Use the safety strap to fix the unit to the work piece
when there is a risk that it might fall off from a high
place or tumble over if for some other reason the
power stops and the magnet is lift off. (Fig. 3)
Use the supporting magnet Ass’y (option) to prevent
unit from falling off when the safety strap cannot be
wound around too big work piece.
Safety Strap
Buckle
Fig. 3

7
Align the magnet parallel to the longer direction of
the work piece.
●Since the surfaces of both sides of H-beam is
normally warped as shown in Fig. 4, the magnet
should be placed parallel to the longer direction of
the work piece to ensure good adhesion and safe
job. Insecure magnetic adhesion is the cause of
cutter damage and unexpected accidents.
Fig. 4
Fig. 5
Be careful about chips.
●Keep your hands away from the cutting area at all
times. During drilling, there will be chips. The chips
are sharp. The chips are rotating with the cutter. Any
contact with the chips can cause severe injuries.
Do not touch the slug.
●Do not touch the slug. The slug is very hot. It will
cause severe burns. Make sure that no one touches
the slug. Make sure that there is no one below the
work area during operation. Hot slugs will fall. Hot
slugs can cause severe burns, other severe injuries,
or even death. Always wear protective equipment,
including protective headgear, eye protection,
hearing protection, and gloves. Do not allow any
person without protective equipment to come near
the machine.
Do not use your hands to remove chips.
●Chips have sharp edges. Use a screwdriver to
remove chips. If you use your hands to remove
chips, you can be injured, even if you are wearing
gloves. Do not use your hands to remove chips
under any circumstances.
The cutting edge is sharp.
●Always wear gloves when changing the cutter. The
cutting edge is sharp. If you do not wear gloves,
you will be cut. Attempting to change the cutter can
result in severe injuries.
Do not use Cutting Oil for other purposes.
●Cutting Oil should be used only for drilling. Please
refer to Section 5-6 of this manual for further
warnings and instructions about Cutting Oil.
CAUTION
Always use a compatible Pilot Pin.
●The Pilot Pin must be compatible with the cutter. An
improper Pilot Pin may result in an accident. See
Section 5-3 to identify compatible Pilot Pins and
cutters. The proper Pilot Pin to be used will vary,
depending on the type of cutter, the diameter of the
cutter, and the length of the cutter.
Do not use power that is generated by an engine-
driven welder.
●The use of an engine-driven welder as a power
source may cause your magnetic driven machine to
malfunction, Power from an engine-driven welder
can damage the electronic circuits in your portable
drilling machine.
Use a Proper extension cord.
●Do not use an extension cord that is too thin. Do
not use an extension cord that is too long. Do not
use an extension cord that is wound on a drum. Do
not share an extension cord with other motor-driven
tools. These uses can cause voltage to drop and
can reduce the holding power of the magnetic base,
causing the machine to move during operation. This
can decrease performance and may cause damage
to the machine. (Fig. 6)
Extension Cord
Max length Size (nominal cross-section
area of the conductor)
10 m Min 1.25 mm2or more
20 m Min 2.00 mm2or more
30 m Min 3.50 mm2or more
Fig. 6

8
Don’t use this machine on the steel material being
electrically welded.
●When the electric welder is not properly grounded,
electricity will run through the Atra Ace machine
via its Magnet, causing possible failure or
malfunctioning, which in turn may cause accident.
Don’t force to feed cutter when drilling manually.
●Because the Hi-Broach and Jet-Broach have
rather thin cutting edges with less cutting pressure
resistance as compared to twist drill, do not force to
feed the cutter when drilling manually.
If you feed it with too much force, the cutter may
break or end up with shorter life than otherwise.
1 APPLICATION
This is a portable drilling machine with a Magnet,
geared to drilling mild steel (mild steel or equivalent)
using One-Touch type Jet-Broach. The machine
will be mounted on the workpiece to be drilled with
the Magnet securely fastening the machine to the
workpiece while drilling takes place.
2 RECEIVING INSPECTION
Upon unpacking, check to see that the shipment is
complete without damage or oil leakage in transport.
Should you find any damage or short-shipment,
please contact sales agent through which you have
purchased your machine or an authorized dealer near
you for corrective actions.
Package Contents Q’ty Check
ATRA ACE 1set
Soluble Cutting Oil 0.5
ℓAss’y
1set
Handle Ass’y 1set
Sub Handle Ass’y 1set
Pilot Pin 08050 1
Spanner 17 1
Hex. Socket Head Cap
Screw 5×12 1
Hex. Socket Screw Key 4 1
Hex. Socket Screw Key 5 1
Safety Strap 1
Hex. Socket Screw With Dog
Point 8×35 1
Blade 1
Guard 1
Instruction Manual 1

9
3 PART NAMES
Red LED
Blue LED
Start Switch
Stop Switch
Power Switch
Switch Cover
Coolant Tank
Handle Power Plug
Grip
Lock Screw
Magnet
Pilot Pin
Cutter
Fig. 7

10
4 FUNCTIONS OF ELECTRONIC
CONTROL
4-1. Overload Detecting Function
When overload is detected during drilling operation,
the following automatic functions are activated.
Please note, however, that there may be cases
where the overload detector does not work properly
if power is drawn from an engine generator or power
source with too high or too low voltage fluctuation.
(1) Load Indication
Two LED lamps indicate the load conditions on the
drill motor. The blue LED lamp is lit under normal
load on the drill and the red LED lamp under
overload.
(2) Automatic Stop
Overload on the drill motor illuminates the red LED
lamp and increasing load on the drill motor will
reduce the motor output and the red LED lamp
will blink. If the drill motor is further loaded for two
seconds, the drill motor will stop automatically for its
own protection and the blue LED lamp will blink.
(3) Automatic Re-start
If the load is released before the electric drill comes
to a complete stop due to the continued overload,
the drill motor will resume its normal operation.
When the drill motor comes to a complete stop, you
can re-start the drilling by pushing the start switch
again.
4-2. Re-start Prevention
The re-start prevention function comes into play
when power failure is restored that has occurred
during operation.
Thanks to this feature, when the electric plug that
has been disconnected during operation is re-
plugged into the receptacle or when power failure
that has occurred during operation is restored, the
drill motor will not re-start automatically preventing
possible accident, although magnetic power IS
restored.
To resume operation, turn on the start switch which
is located on top of the machine to start the drill
motor.
4-3. Magnet Interlock
When the Magnet fails, the drill motor will not start
revolving and the red LED lamp will blink. To repair
defective magnet, please contact the sales agent
from whom you purchased your unit or an authorized
dealer near you.
5 MACHINE SETUP
WARNING
●When setting up machine, turn off the Magnet
Switch and disconnect the power supply plug
from power source.
5-1. Accessory Installation
Insert the accessory feed handle into the handle
shaft on the side of the body. (Fig. 8)
※The handle bar can be positioned on the right or
left side for comfortable drilling and mounting in
confined spaces.
See Fig. 9 for the mounting position of the sub
handle.
When mounting the sub handle, align the pin on the
body to the cutout on the sub handle then assemble
as shown in Fig. 9.
Handle Shaft
Feed Handle Feed Handle
Fig. 8
Hex. Socket Head Cap Bolt
Cutout on Sub Handle
Hex. Socket Head
Cap Bolt
Mounting Position of Sub Handle
Fig. 9

11
5-2. Using Cutter
CAUTION
●Use One-Touch type cutters only.
●
For better workability and safety, do not use
worn or damaged cutters.
5-3. Combination of Cutter and Pilot Pin
CAUTION
●
Do not use any other combinations than those
shown in the compatibility table.
Use a Pilot Pin appropriate for the cutter. (Fig. 10)
A Pilot Pin to be used varies depending on the cutter
type, diameter, length (depth). A wrong combination
of cutter and Pilot Pin would not allow slug to be
ejected at the end of drilling and/or prevent Cutting
Oil from reaching the cutting point, resulting in
cutting tool damage.
Diameter (mm) Depth (mm) Pert No. Pilot Pin
12 〜17 25L TK01167 06025 (C1)
50L TK01166 06050 (C2)
17.5 〜35 35L TJ15859 08035 (A2)
50L TJ16019 08050 (A3)
Fig. 10
5-4. Mounting/Removing Cutter
WARNING
●Wear safety gloves when replacing cutter.
CAUTION
●Do not use any other combinations of Pilot
Pin and cutter than those shown in the
compatibility table.
(1) Lift the cutter up by turning handle
counterclockwise. (Fig. 11)
Upward Downward
When mounted on the left side
Fig. 11
Downward Upward
When mounted on the right side
Fig. 12
(2) Insert a pilot pin, appropriate for the cutter you
use, into the cutter. (Fig. 13)
Cutter
Pilot Pin
Fig. 13
(3) Align the round depression on the cutter with the
white line on the sleeve, then push up the cutter.
If you insert the cutter deep to the hilt, the sleeve
will turn clockwise and lock by itself with a click.
※When you find it hard to insert the cutter all the
way, turn the sleeve counterclockwise to take it
out and do the insert all over again.
Spindle Arbor
Align
Sleeve
Flat depression
White Line
Fig. 14

12
(4) To remove the cutter, turn the sleeve
counterclockwise. The cutter will come off. (Fig. 15)
Come off
Turn the sleeve
counterclockwise
Sleeve
Spindle Arbor
Fig. 15
5-5. Preparation of Cutting Oil
Cutting Oil Safety Precautions
WARNING
(1) Use
●Use Cutting Oil for cutting purpose only. Don’t use it
for household purposes.
(2) Handling Precautions
●The Cutting Oil contains amine. Do not mix it up
with rust inhibitor, etc. containing nitrite.
●Wear safety glasses for eye protection when
handling Cutting Oil: eye injury may results if it gets
into your eyes.
●Wear protective gloves for hand protection when
handling Cutting Oil: skin injury may result if it
comes into contact with your skin.
●Wear respirator when exposure to respiratory
hazards with oil mist or vapor is anticipated.
Inhalation of oil mist or vapor may make you feel
sick.
●When diluting Cutting Oil, follow the instructions per
the Operation Manual.
●Keep Cutting Oil out of reach of children.
●Don’t drink Cutting Oil.
(3) First Aid
●If Cutting Oil gets into your eyes, immediately open
your eyelids with your fingers and wash your eyes
with plenty of water for at least 15 minutes. If your
eyes feel irritated, consult with a medical doctor and
follow his/her instructions.
●If Cutting Oil comes into contact with your skin,
immediately wash it away with plenty of water and
soap. Take off contaminated clothes. Clean the
clothes if you need to wear it again. If your skin
feels irritated, consult with a medical doctor for
medical instructions.
●If someone inhales oil mist or vapor, immediately
take him/her to an area where fresh air is abundant
and wrap up his/her body with a blanket, etc. to
keep body temperature. Have him/her take a
rest and consult with a medical doctor for medical
instructions.
●If someone drinks Cutting Oil, immediately make
him/her drink plenty of water and vomit it. Consult
with a medical doctor for medical instructions. When
unconscious, do not pour water into his/her mouth
nor induce him/her to vomit.
(4) Instructions in Case of Fire
●If fire breaks out in the vicinity, wear PPE (personal
protective equipment) and use foam, powder or
CO2fire extinguisher to put the fire out from the
windward.
(5) Storage
●When storing Cutting Oil after use, put it into a
container and put a lid on for tight sealing so
that dust or moisture, which is a catalyst for
contamination, may not get in.
●Avoid direct sunlight, rainwater or the like and store
Cutting Oil in a dim cool area.
(6) Disposal
●For disposal of concentrate solution and used fluid,
request a waste-disposal company to dispose them
as industrial waste in accordance with the local laws
and regulations.
●Treat flushing water through pH adjustment,
condensation/sedimentation, activated sludge
process, activated carbon adsorption, etc., and
discharge it in accordance with the regulations of
your local municipal bylaw.
●Residual dross will remain in an emptied container:
be careful when handling an empty container.
(7) Others
●When Cutting Oil is poured into another container
for use, post chemical and label information at the
site where it is kept. At the same time, keep the
Operation Manual handy so that it can be referred to
whenever necessary.
●For further details, contact us for product safety data
sheet.
●All the information and descriptions that have been
provided are based on the currently available
documents and information, which may be revised
upon our new recognition and/or discovery.
●The precautions provided apply to regular handling.
If special handling method is used, take safety
measures that are suitable for your applications and
usage.
●The information contained herein is for your

13
reference purpose only, to which we make no
warranty of any kind and for which we shall not be
held responsible.
(1) Always use our genuine cutting oil. With other
cutting oil, the cutting performance and service
life would be decreased.
(2) Dilute the cutting oil eight to ten portions of tap
water. Do not use well water.
(3) Fill the diluted cutting oil into the tank container
on top of the body. The oil flow control is done as
follows.
・
When the front lever is turned to the left cutting
oil flows, and turned to the right, stops. (Fig. 16)
・
Filling the tank container with too much cutting
oil may cause cutting oil overflow when the
cutter is lifted up. The level of cutting oil in the
tank container should not be more than as is
shown in Fig. 16.
Lock Screw
Max.acceptable level of cutting oil
Cutting oil flows Cutting oil stopsCutting oil flows Cutting oil stops
Fig. 16
・Loosen the lock screw and you can allow the
tank container to rotate for position change. In
perpendicular drilling on standing wall, change
the position of tank container so that the air vent
of the tank comes on top. (Fig. 17)
Fig. 17
(4) Jet Oiler squeeze bottle is available as the
optional accessory. Use as follows:
Remove the tank container from the unit body.
Mount the optional oil supply adapter, tubes, and
the Jet Oiler all connected as shown in Fig. 18.
Fill up cutting oil into the Jet Oiler.
Jet Oiler
Tube
Oil supply adapter
Fig. 18
5-6. Mount Chip Breaker
When setting the chip breaker, see that the tip of
blade may not come into contact with the cutting
tool. Chip Breaker shreds cutting chips generated
in the drilling into small pieces and facilitates chips
smooth discharging.
Set the blade
(1) Mount cutter
Loosen the hex socket head cap screw, and pull
the blade away in the direction as shown by the
arrow until it would no longer move. And then,
mount a cutter.
(2) Set the blade
Set the blade so that the cutter and the blade will
have a clearance of 0.5 – 0.8mm and fasten it
securely to the blade stay with hex. socket head
cap screws.

14
Blade stay
Blade
Pull the blade away
Clearance 0.5〜0.8mm
Fig. 19
6 MACHINE OPERATION
WARNING
●Always Wear Safety Glasses.
●Always Wear Hearing Protection.
●Wear respiratory protective equipment.
●Never touch the mounted cutter and the
rotating parts of the machine such as the
Spindle Arbor after the power cable is
connected to power source.
6-1. Start and Stop
(1) Magnet ON
Turn on the power switch to activate magnetic
power. (Fig. 20).
(2) Drill Motor ON
Turn on the start switch to run the drill motor.
(Fig. 20)
(3) Stop
Turn off the stop switch to stop the drill motor.
Turn off the power switch to deactivate magnet
power, and make complete stop.
ONOFF
LOAD
Stop switch OVER LOAD
OFF
OFF
ON
ON
MAGNET
Power switch
Start switch
Fig. 20
6-2. How to Use the Feed Handle (Fig. 21)
The socket part of handle has ratchet mechanism.
You do not have to remove the handle from the
handle shaft every time in order to change the
position.
Pulling the handle in the direction of arrow causes
the handle to disengage from the handle shaft.
While disengaging from the shaft, the handle can
be turned to the next lock position. Handle lock
positions are fixed at each 60° pitch.
Handle position can be
changed without moving
up or down the cutter.
Pulling the handle in the
direction of arrow causes
the handle to disengage
from the handle shaft.
Fig. 21
6-3. Drilling Oblong Hole
CAUTION
Always drill slowly.
Drill round holes in the order of ①, ②, ③to get an
oblong hole. For the steps ②and ③, take care so
that the cutter may not be fed into the work piece
with so much force.
File away any remaining excesses. See Fig. 22.
Spacing of round holes should be so arranged that
the Pilot Pin will always hit the material yet to be
machined.
123
File away any remaining excesses.
Fig. 22
6-4. Drill Stacked Plates
CAUTION
●
When drilling stacked plates, fix the steel plates
so that the gap between the plates must be less
than or equal to 1mm.
●
Use special one-touch Jetbroach Cutters
exclusively designed for stacked plates.
6-5. Drilling Procedure
CAUTION
(1) Punch Mark
Always a large punch mark should be stamped
quite vertical to the work piece. Be careful to get
the precise position for the punch mark since it
serves as the drilling center guide. (Fig. 23)

15
Fig. 23
(2) Make sure to clean the both portions of surface
of the work piece where the magnet is placed and
the hole is cut.
WARNING
Always keep the magnet sole clean. Always
keep the work piece surface clean. Any foreign
object between the magnet and the work piece
will reduce magnetic power. This could cause
the machine to move around during operation,
which may result in an accident. Keep all working
surfaces clean and flat without any rust, chips or
undulations.
(3) Align with Punch Mark
WARNING
Make sure that the lock screw to fix body position
is securely fastened before drilling.
Loosen the lock screw on the side of the body, and
moves the body back and forth or around to align
the tip of the pilot pin with the punch. Then tighten
the lock screw in the arrow direction. (Fig. 24) The
lock screw has the wings and is designed to fasten
with hands. Do not tighten it with a spanner or the
like.
※The lock screw can be mounted on either left or
right side of the body.
Lock Screw
Fig. 24
(4) Magnet ON
WARNING
Check to see that magnetic power is activated.
Turn on the power switch. Magnet will stick to the
work piece. (Fig. 25)
ONOFF
LOAD
Stop switch OVER LOAD
OFF
OFF
ON
ON
MAGNET
Power switch
Start switch
Fig. 25
(5) How to attach the Guard
Please attach the guard as shown in Fig.26.
Guard
Fig. 26
(6) Drill Motor ON
WARNING
Do not touch any rotating parts.
Press the start switch to activate the drill motor.
(Fig. 27)
(7) Drilling
(7-1) Drilling
Turn the Feed Handle downward to start drilling.
For the first 2 – 3 mm of the drilling, slowly feed
the drill motor. (Fig. 27)
Feed slowly to 2 – 3 mm deep.
Feed slowly to
2 – 3 mm deep
Fig. 27

16
(7-2) Final stage of drilling
CAUTION
When drilling a hole in an angle, channel or
H-section irons, etc., cutter may be damaged
when it comes to the slanted part of the work
piece on the final cutting stage. Feed slowly in its
start and finish cutting. (Fig. 28)
Slanted surface
R
Fig. 28
(7-3) Drilling on the wall
When drilling on the wall, position the cutter at the
lower side and the magnet on the upper side.
(Fig. 29)
Fig. 29
(8) Finish drilling the hole
WARNING
Beware of ejecting slug when finish with the hole.
Never touch the slug with bare hands since it is
hot and sharp.
After complete drilling, turn the Feed Handle to
uplift the cutter and press the stop switch.
When the drill motor stops, immediately turn off
the power switch. Continuous current flow through
the magnet, while it is ON, could shorten the
service life of the magnet.
(9) About Remaining Magnet Power
There are some cases that you cannot lift up the
magnet because of remaining magnet power even
after turning off the switch. The thicker the work
piece plate or the finer the surface finish of the
plate, more often you will face the case. Follow the
following instructions.
Hold the unit at the upper part of the body and the
grip then pull down them towards you.
Upper part ofthebodyGrip
Pull towards you
Fig. 30
(10) Removing Slug
CAUTION
Do not start the next drilling with a slug remaining
on the cutter.
The tool has automatic slug discharge system.
But when the slug would not come out by turning
the feed handle to lift up the cutter, do not try
to turn the handle forcefully. This will result in
machine troubles.
Upon drilling complete, slug will be ejected
automatically pushed out by the spring-operated
pilot pin.
Should the slug left choked inside the cutter, turn
the handle to lift up the cutter to eject the slug
forcefully. When even turning the handle with
the same force as in the feed for cutting a hole,
you cannot eject the slug, do not turn the handle
forcefully any more. Remove the slug from inside
the cutter by tapping the collar of the slug with a
needle stick or alike. (Fig. 31)
PilotPin
Cutter
Slug
Thinpunch
Collar
Slug
Fig. 31

17
(11) Lock handle can be replaced with Hex.
Socket Head Cap Screw
CAUTION
The unit body can be moved back and force or
sideways to facilitate proper alignment of pilot pin
to the punch mark.
When the lock handle interferes the proper
alignment due to narrow space proceed hole
making in the following manner.
(1) Dismount the lock handle by turning it
counterclockwise.
(2) Remove the lock handle and put the accessory
hex. socket head cap screw in place and tightly
fasten with the hex. socket screw key so that
the tool body would not move around on the
magnet.
(3) Move the whole unit around to align the tip
of pilot pin to the punch mark and turn on the
power switch to activate magnetic power. And
you may start drilling.
7 TROUBLESHOOTING
WARNING
●
Never attempt to repair machine yourself: injury or damage to equipment may result.
●
Please feel free to consult the sales agent through which you have purchase your machine or an
authorized dealer, when the following symptoms appear or when you have any questions about our
products.
The machine has electronic control. Be sure to turn off all the switches, pull up the electric drill, and then check the
machine, when the operator come across to the following situations such as.
Problem Causes Solutions
Switch lamp does not come
on when the power switch is
turned on.
Power plug is not properly connected to
receptacle.
Connect power plug properly to
receptacle.
The drill motor would not
start and LED lamp brinks in
red when the motor switch is
turned on.
The magnet is not activated. Request for repair to check the
continuity to the magnet.
The drill motor would not start
and LED lamp brinks in blue
to red when the motor switch
is turned on.
The drill motor or the control circuit has
been damaged.
Request for repair.
The drill motor stops during
drilling. (The magnet stops
working and the power ON
lamp is off.)
Power failure or plug was pulled out of
power supply.
Restore power or insert power plug back
in, then set the start switch on again.
No cutting oil or insufficient
cutting oil flow.
The lever is turned to the right. Turn the lever to the left.
Coolant tank is empty. Refill cutting oil into the tank.

18
8 MAINTENANCE/SERVICE
WARNING
●
Always disconnect the power and turn off the
switch before attempting any maintenance.
Failure to disconnect the power and turn off the
switch during set up, inspection or maintenance
can cause accidents and severe injuries.
●
Check to see periodically that mounting screws
are tight. If you find them loose, retighten.
8-1. Keep the drill motor at the lifted up position
Keep the drill motor at the lifted up position while not
in use, or for the purpose of safety, when you do not
use the machine even for a while if it has a cutter
mounted. The pilot pin and/or cutter may have the
chance to be damaged if you keep the cutter at the
low position while carrying around.
8-2. Keep the Tip of Pilot Pin Sharp
When the tip of pilot pin gets dull, it sometimes
fails to seat properly in punched hole, and results
inaccurate hole position. See that the tip is sharp
enough from time to time. If you find otherwise,
regrind with care or replace as required. Grinding
with too much force makes the tip rather dull or
soften the pin material to such a degree that it is no
longer usable. (Fig. 32)
Pilot Pin
Optimal angle 70°
Grind the tip
Fig. 32
8-3. Recovery Measures When Pilot Pin Gets
Jammed
To replace the cutter, dismount the cutter from drill
and remove the pilot pin from the old cutter and
insert it into the new replacement cutter. The pilot
pin serves as the guide for the cutter centering.
However there are cases the pin would not come
off easily because cutting chips in the clearance
between the cutter and pin, cause jamming. In such,
tap the tip of the pilot pin with a WOODEN hammer
alike to push it out.
PilotPin
Cutter
Cuttingchips
Fig. 33
8-4. Cutter Regrinding
When you need to regrind our cutters, please
contact sales agent through which you have
purchased or an authorized dealer near you.
8-5. Carbon Brushes Inspection and Replacement
Check Carbon Brushes for wear periodically.
When the length of Carbon Brushes gets as short
as 6mm, replace it with a new one, for, if you don’t,
chances are that you’ll have a rectification problem
which may cause machine failure. (Fig. 34)
Check - machine failure.
(1) Remove the Brush Cap with a straight slot
screwdriver.
(2) Remove the worn-out Carbon Brush and replace
it with a new one. Then reattach the Brush Cap.
(3) After replacing the Brush, operate the unit for
about ten minutes with no load.
Fig. 34

19
9 OPTIONAL PARTS
9-1. Nitto-Brand Cutting Oil
CAUTION
Use Nitto-brand Cutting Oil for Atra Ace.
Part No. Part Name
TB01507 Cutting Oil 2ℓ
(Light Blue)
9-2. Pilot Pin
(metric size)
Part No. Part Name
TK01167 Pilot Pin 06025 (C1)
TK01166 Pilot Pin 06050 (C2)
TJ15859 Pilot Pin 08035 (A2)
TJ16019 Pilot Pin 08050 (A3)
9-3. Supporting Magnet Ass’y
Part No. Part Name
TB04374 Supporting Magnet Ass’y
9-4. Jet Oiler
Part No. Part Name
TQ10581 Jet Oiler
TQ05275 Tube 4×7×1000
TB07306 Lubrication Adapter Ass'y