Tone GNBC81E-UC User manual

INSTRUCTION MANUAL
Ｎｏ．１７０5
MODEL
GNBC81E-UC / GNBC121E-UC / GNBC211E-UC
Double Insulation
CAUTION
Read and fully understand all the instructions before use.
Keep this manual in designated place for easy and quick reference.
The models mentioned in this manual are designed for use outside Japan.
Warranty shall be void if above mentioned models are used in Japan.

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PREFACE
Thank you for purchasing the- .
■ Upon receipt, check and confirm the following:
● Check for any damage.
● Check for any loose or missing screws and bolts.
● Check the model as per order.
● Check all the accessories are contained. (➭P.15～18)
If any problems are found, contact your distributor.
■ Read this instruction manual carefully before use.
Full understanding of manual is essential to prevent personal injury or
malfunction.
■ Keep this manual in the metal case for reference.
■ If the manual or warning label is lost or becomes illegible, or if an additional
manual is required, contact your distributor.
If you have any questions about the products or the contents of this instruction
manual, contact your distributor.
■ This manual is only applicable outside Japan.

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SAFETY INSTRUCTION
This manual specifies three (3) basic safety instructions:
Instructions are classified by degree of risk and described as follows:
Danger is used to indicate threatening
dangerous or unsafe practices which could
immediately result in severe personal injury
or death in the worst case.
Warning is used to indicate hazardous or
unsafe practices which could result in severe
personal injury or death in the worst case.
Caution is used to indicate hazardous or
unsafe practices which could result in
personal injury, product or property damage.
Even if the risk is classified as , the risk could become more serious
depending on the conditions. Make sure to follow all instructions when operating
these tools.

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TABLE OF CONTENTS
1. GENERAL SAFETY INSTRUCTIONS ····································· 4
2. APPLICATION ·················································································· 7
3. PRECAUTIONS FOR USE ················································· 7
4. PART NAME & ACCESSORIES ············································ 15
5. BEFORE USE ················································································ 19
6. CHANGING ACCESSORIES ··················································· 21
7. OPERATING PROCEDURE ····················································· 23
8. TIGHTENING TORQUE ····························································· 26
9. EXPLANATION LED INDICATION ······································· 28
10. INSPECTION & MAINTENANCE ··········································· 29
11. FEATURE ························································································ 30
12. SPECIFICATIONS ······································································· 31
13. AFTER SALES SERVICE ························································· 32

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1. GENERAL SAFETY INSTRUCTIONS
WARNING
When using electric tools, basic safety precautions, including the following, should
always be followed to reduce the risk of fire, electric shock and personal injury.
Read all instructions before operating this product and keep the instructions for
future reference.
SAVE THESE INSTRUCTIONS
1) Work area
a) Keep work area clean and well lit. Cluttered and dark areas invite
accidents.
b) 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 of fumes.
c) Keep children and bystanders away while operating a power tool.
Distractions can cause you to lose control.
2) Electrical safety
a) 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.
b) 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.
c) Do not expose power tools to rain or wet conditions. Water entering
a power tool will increase the risk of electric shock.
d) 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.

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e) 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.
3) Personal safety
a) 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.
b) Use safety equipment. Always wear eye protection. Safety equipment
such as dust mask, non-skid safety shoes, hard hat, or hearing
protection used for appropriate conditions will reduce personal injuries.
c) Avoid accidental starting. Ensure the switch is in the off position
before plugging in. Carrying power tools with your finger on the switch
or plugging in power tools that have the switch on invites accidents.
d) 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.
e) Do not overreach. Keep proper footing and balance at all times.
This enables better control of the power tool in unexpected situations.
f) Dress properly. Do not wear loose clothing or jewelry. Keep your hair,
clothing and gloves away from moving parts. Loose clothes, jewelry or
long hair can be caught in moving parts.
g) If devices are provided for the connection of dust extraction and collection
facilities, ensure these are connected and properly used. Use of these
devices can reduce dust related hazards.

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4) Power tool use and care
a) 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.
b) 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.
c) Disconnect the plug from the power source before making any adjustments,
changing accessories, or storing power tools. Such preventive safety
measures reduce the risk of starting the power tool accidentally.
d) 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.
e) Maintain power tools. Check for misalignment or binding of moving parts,
breakage of parts and any other condition that may affect the power tools
operation. If damaged, have the power tool repaired before use.
Many accidents are caused by poorly maintained power tools.
f) Keep cutting tools sharp and clean. Properly maintained cutting tools with
sharp cutting edges are less likely to bind and are easier to control.
g) Use the power tool, accessories and tool bits etc., in accordance with
these instructions and in the manner intended for the particular type of
power tool, taking into account the working conditions and the work to be
performed. Use of the power tool for operations different from intended
could result in a hazardous situation.
5) Service
a) 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.

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2. APPLICATION
■ is an electric tool for tightening hexagonal bolts.
3. PRECAUTIONS FOR USE
■ To prevent accidents or personal injury read and follow all instructions
listed below.
DANGER
● Beware of electric shock when operating at elevated heights.
○ Failure to follow these instructions may result in fall down accidents.
－ About Double Insulation －
This electric wrench has a double insulation structure. An electric conductor
portion is insulated by two insulators which enhances safety against electric
shock. The electric wrenches that have double insulated structure are clearly
marked with (Double Insulation Mark) on the rating plate.

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DANGER
●Never put hand in the turning circle of reaction bar during operation.
The reaction bar rotates in the reverse direction.
○If the wrench is started, the reaction bar will turn in the direction opposite
to the rotation of nut. There is a risk that finger might be pinched by
reaction bar and reaction-member.
Negligence might cause accidents or injury.
WARNING
● Insert socket securely to the depth of nut.
○ If insufficient, it might damage socket and cause personal injury.
Negligence might cause accident, breakage or injury.
Reaction Member
Rotation Direction
of Nut (Socket)
Rotation Direction
of Reaction Bar

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WARNING
● Beware of electric shock.
○ Never use the wrench when moisture is present such as rain or snow.
○ Never touch the plug with wet hands.
Failure to follow these instructions may result in electric shock, fire or
electric leakage.
● Firmly hold the wrench with both hands during operation.
○ The wrench automatically shuts off when snug tightening is completed.
Prepare for automatic shut off by firmly holding the wrench with both hands
as the reaction force maximizes just before automatic shut off.
Failure to follow these instructions may result in personal injury.
● Electric cord must be regularly inspected.
○ Stop using the wrench if there is a problem with the electric cord.
○ Contact your distributor for repair.
Failure to follow these instructions may result in electric shock or electric
leakage.
● Never use the wrench in an area where gasoline, gas, thinner,
benzene, etc., are stored.
○ Do not use the wrench around flammable substances to avoid accidental
fire caused by the spark out of the electric motor.
● Beware of falling accidents when working at elevated heights.
○ Wear safety belt.
○ Provide safety net or canvas as safe guarding against falling items.
○ Confirm that no one is underneath the working site before operation.
○ Stop operation when physically or mentally tired.
Failure to follow these instructions may result in accidents.

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WARNING
● Avoid overloading.
○ Use the wrench and its accessories within the rated specifications.
An overloaded wrench and its accessories may result in the malfunction of
the wrench which may cause accidents or personal injury.
● Properly install the sockets as described in this manual.
Incomplete installation may result in accident and personal injury.
See “CHANGING ACCESSORIES” on page (➭P.21)
● Avoid accidental Starting
○ Ensure that the switch is in the off-position before plugging into a power
source.
○ Never carry the wrench with your fingers on the switch when the plug is
connected to a power source.
● Disconnect the plug from the power source when:
○ Not in use.
○ Changing accessories.
○ Performing inspection and maintenance.
○ Or other danger is foreseen.
Failure to follow these instructions may result in accidental starting and
personal injury.
● Do not disassemble or modify the wrench.
○ Disassembly or modification made by unauthorized personnel may result
in malfunction or personal injury.
○Disassembly and Re-assembly is permitted for the following consumable
parts: Sockets, Set Screws, Brush Caps, and Carbon Brushes.

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WARNING
● Store the wrench in the metal case and place it in protected
storage when not in use.
○ Store the wrench in a secure, dry location to keep any unauthorized
personnel away.
Failure to follow these instructions may result in malfunction or accidents.
● Immediately stop using the wrench and disconnect the plug when
unusual sound, vibration or smell is detected.
○ Contact your distributor immediately.
Failure to follow these instructions may result in serious injury.
● Contact your distributor for repair service.
○ Repair work should only be carried out by a qualified technician.
○ Repair work done by an inexperienced person may cause accidents,
injury or malfunction.
● Check the following items before operation.
○ Check for any deformation, crack or damage on the wrench body,
sockets, accessories, electric cord, plug, etc.
○ Make sure that sockets are correctly installed on the wrench.
○ Make sure that set screws are securely fastened. Loose installation
may result in accidents and personal injury.
○ Do not use the wrench if any problems are found on the items listed
above.
Failure to follow these instructions may result in electric shock, fire or burn
accidents.
● Use appropriate power source as indicated on the rating plate.
Failure to follow these instructions may result in fire or burn accidents.

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WARNING
● Immediately check the wrench if it is dropped or impacted.
○ Check for deformation, crack, damage and other abnormality. Stop
using the wrench if any abnormality is found.
○ Do not use the wrench if any problems are found.
Failure to follow these instructions may result in electric shock, fire or burn
accidents.
CAUTION
● Use Commercial power supply to operate the wrench.
● Follow the instructions below when using generator.
■ Use 50-60Hz (AC)
sinusoidal power supply without high harmonic wave.
Power supply including high harmonic wave may cause malfunction or
breakage of the wrench.
■ Use high capacity generator.
Power requires almost 2kW (2kVA) per one month.
■ The operating voltage must remain within +/-10% of the rated voltage at
all times.
■ Do not use an inverter generator.
(Inverter generator: The engine rpm will speed up and slow down automatically due to
the wattage being pulled from the generator.)
Failure to follow these instructions may cause malfunction or breakage of
the wrench.
● Do not use welder generators.
■ Welder generators may cause malfunction or breakage of the control base
installed in the wrench.
■ Some welder generators may produce electrical noise that may cause the
wrench to malfunction.

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CAUTION
● Do not use welders along with the wrench.
■ The wrench may malfunction due to extraordinary electrical noise
even if the welders are connected to other generators that the wrench
is not connected to.
● Keep work area clean.
■ Cluttered areas and benches invite accidents.
● Keep children away.
■ Do not let children touch the wrench or electric cord.
■ All visitors should be kept away from work area.
● Secure work area.
■ Keep body stance balanced and firm.
■ Never wrap the electric cord around something.
■ Keep work area well it.
● Use suitable model for each application.
■ Do not use the wrench beyond its rated specifications.
■ Do not use the wrench for unintended purposes.
● Dress properly.
■ Always wear gloves and non-skid shoes when operating.
■ Always wear safety helmet.
● Use genuine accessories and attachments manufactured by TONE
CO., Ltd.
■ Use the genuine accessories mentioned in this instruction manual
or TONE’s general catalog.
Failure to follow these instructions may result in malfunction or accidents.

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CAUTION
● Do not connect multiple plugs to a single outlet by using a multiple
outlet adaptors.
Over current may cause fire, accidents or malfunction.
● Do not abuse the electric cord.
■ Never use the electric cord for carrying, pulling or unplugging the power.
■ Keep the electric cord away from heat, oil, sharp edges or moving parts.
● Keep electric motor well ventilated.
■ Do not put any foreign materials into the vent.
■ Do not block exhaust vent.
● Maintain wrench.
■ Keep the wrench handle clean, dry and free of oil or grease.
●Provide leakage breaker as a shock guard for each wrench.
■Although a double insulated wrench does not require a leakage breaker,
use of leakage breaker is strongly recommended as an extra safeguard.
● When using an extension cord, make sure that voltage remains
within +/- 10% of the rated voltage at all times.
●When using an extension cord, select shorter extension units
than specified below depending on the cross section.
Nominal conducting
cable cross section.
Max. Length
110-120V
AWG 14 50ft
AWG 12 80ft
AWG 10 130ft
■ Using an extension cord longer than the Maximum Length listed
above may result in a malfunction or breakdown due to
performance drop of the wrench.
● Observe local laws and rules concerning noise level.

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4. PART NAME & ACCESSORIES
Part Name
Internal Gear
Bar Socket
Set Screw
Motor Carbon Brushes
Rating Plate
Trigger Switch
Control Box Torque Setting Dial
Plug
Cord
Graduation
Metal Case
Instruction
Manual
(-)Driver
for Socket
(-)Driver
for Control Base
Changing Switch
Main Body
Accessory
Green LED Red LED

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Accessories
Model Bar Socket Accessories
GNBC81E-UC
GNBC82E-UC 22UR36T ･(-)Driver
For Bar Socket
For Torque Setting Dial
･Metal Case
･Instruction Manual
GNBC121E-UC
GNBC122E-UC
24UR41T
GNBC211E-UC
GNBC212E-UC
30UR50T
Optional Accessories
Model
GNBC81E-UC
GNBC82E-UC Bar Socket 22UR Series
GNBC121E-UC
GNBC122E-UC
Bar Socket 24UR Series
GNBC211E-UC
GNBC212E-UC
Bar Socket 30UR Series
● Contact your distributor for the accessories above and other optional
accessories.

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5. BEFORE USE
WARNING
● Check the following contents before connecting the plug into a
power source.
Failure to follow these instructions may result in serious injury due to
accidental starting,
○ Inspection of the wrench
Check for any deformation, crack or damage on the wrench body, sockets and
accessories before use. Do not use the wrench if any problem is found on items
listed above.
Make sure that set screws are securely fastened.
Loose installation may result in accidents and personal injury.
See “CHANGING ACCESSORIES” on page (➭P.21)
○ Make sure to use adequate power supply.
Use adequate power source as indicated on the rating plate.
○ Choose Socket
Make sure to use to correct socket suitable for the product to be tightened.
○ Install Socket
Socket should be securely installed on the wrench.
Loose installation may result in accidents and personal injury.
See “CHANGING ACCESSORIES” on page (➭P.21)
○ Warm up the wrench
Implement warm up procedure before operation.

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CAUTION
● Warm up procedure with no-load should be carried out about 5
minutes before operation. Especially, when the wrench is used at
low torque setting under low temperature (0～10℃), the warm up
procedure with no-load must be carried out at least 5 minutes In
this case, the torque setting dial should be set at Maximum.
■ After the warm up procedure is finished, set the desired torque and
squeeze the trigger switch to check the activation of the wrench.

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6. CHANGING ACCESSORIES
○ Remove bar socket form the wrench by unscrewing set screws with (-) driver.
Do not remove the set screws completely from outer socket holder.
○ Select adequate bar socket for the bolts being tightened.
i.e. Use TONE genuine 7/8” bar socket for tightening 7/8” high strength
hexagonal bolts/nuts.
○ Mount the bar socket on the wrench body and remove the gap between the
bar socket and the wrench body.
Fasten the set screws only after the gap is completely removed.
Bar Socket Outer Socket Holder
Wrench Body
Set Screw
Bar Socket
Set Screw
GAP must be removed!