G720G | Black&Decker G720G SMALL ANGLE GRINDER instruction manual

English (original instructions)
Technical Data
Disc diameter
Rated speed
Spindle size
Cable length
Grinding wheels thickness
Type of wheel
220V ~
such as in the presence of flammable liquids,
gases or dust. Power tools create sparks which may
ignite the dust or 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.
L pA
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
Surface grinding (a h,SG) 9.846 m/s 2 , uncertainty (K) 1.5 m/s2
carrying, pulling or unplugging the power tool.
The vibration emission level given in this information sheet has been
Keep cord away from heat, oil, sharp edges or
measured in accordance with a standardised test given in EN 60745 and may
moving parts. Damaged or entangled cords increase
be used to compare one tool with another. It may be used for a preliminary
the risk of electric shock.
assessment of exposure.
e. When operating a power tool outdoors, use an
WARNING: The declared vibration emission level represents the
extension cord suitable for outdoor use. Use of
main applications of the tool. However if the tool is used for
a cord suitable for outdoor use reduces the risk of
different applications, with different accessories or poorly
electric shock.
maintained, the vibration emission may differ. This may
f. If operating a power tool in a damp location is
significantly increase the exposure level over the total working
unavoidable, use a residual current device (RCD)
protected supply. Use of an RCD reduces the risk of
An estimation of the level of exposure to vibration should also
take into account the times when the tool is switched off or when
electric shock. Note: The term “Residual Curent Device
it is running but not actually doing the job. This may significantly
(RCD)” can be replaced by “Ground Fault Circuit
reduce the exposure level over the total working period. Identify
Interrupter (GFCI)” or by “Earth Leakage Circuit
additional safety measures to protect the operator from the
Breaker (ELCB)”.
effects of vibration such as: maintain the tool and the
accessories, keep the hands warm, organisation of work
first contact your local Black & Decker office or nearest
authorized service center.
Warning! Read and understand all instructions. Failure
to follow all instructions listed below, may result in electric
shock, fire and/or serious personal injury.
General power tool safety warnings.
Warning! Read all safety warnings and
all instructions. Failure to follow the warnings and
instructions listed below may result in electric shock,
fire and/or serious injury.
Save all warnings and instructions for future reference.
The term “power tool” in all of the warnings listed below
refers to your mains operated (corded) power tool or
battery operated (cordless) power tool.
1. Work Area Safety
a. Keep work area clean and well lit. Cluttered and
dark areas invite accidents.
b. Do not operate power tools in explosive atmospheres,
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 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.
c. 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.
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
jewellery. Keep your hair, clothing and gloves away
from moving parts. Loose clothes, jewellery 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.
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
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
c. Disconnect the plug from the power source and/or
the battery pack 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.
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. If devices are provided for the connection of dust
extraction and collection facilities, ensure these
are connected and properly used. Use of dust
collection can reduce dust-related hazards.
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.
Safety Instructions for All Operations
Safety Warnings Common for Grinding
a. This power tool is intended to function as a grinder
tool. Read all safety warnings, instructions,
illustrations and specifications provided with this
power tool. Failure to follow all instructions listed
below may result in electric shock, fire and/or serious
b. Operations such as sanding, wire brushing, polishing
or cutting-off are not recommended to be performed
with this power tool. Operations for which the power
tool was not designed may create a hazard and cause
personal injury.
Do not use accessories which are not specifically
designed and recommended by the tool manufacturer.
Just because the accessory can be attached to your
power tool, it does not assure safe operation.
d. The rated speed of the accessory must be at least
equal to the maximum speed marked on the power
tool. Accessories running faster than their rated speed
can break and fly apart.
The outside diameter and the thickness of your
accessory must be within the capacity rating of your
power tool. Incorrectly sized accessories cannot be
adequately guarded or controlled.
Threaded mounting of accessories must match
the grinder spindle thread. For accessories
mounted by flanges, the arbour hole of the
accessory must fit the locating diameter of the
flange. Accessories that do not match the mounting
hardware of the power tool will run out of balance,
vibrate excessively and may cause loss of control.
g. Do not use a damaged accessory. Before each use
inspect the accessory such as abrasive wheels for
chips and cracks, backing pad for cracks, tear or
excess wear, wire brush for loose or cracked wires.
If power tool or accessory is dropped, inspect for
damage or install an undamaged accessory. After
inspecting and installing an accessory, position
yourself and bystanders away from the plane of
the rotating accessory and run the power tool at
maximum no-load speed for one minute. Damaged
accessories will normally break apart during this test
h. Wear personal protective equipment. Depending on
application, use face shield, safety goggles or safety
glasses. As appropriate, wear dust mask, hearing
protectors, gloves and shop apron capable of stopping
small abrasive or workpiece fragments. The eye
protection must be capable of stopping flying debris
generated by various operations . The dust mask or
respirator must be capable of filtrating particles
generated by your operation. Prolonged exposure to
high intensity noise may cause hearing loss.
Keep bystanders a safe distance away from work
area. Anyone entering the work area must wear
personal protective equipment. Fragments of
workpiece or of a broken accessory may fly away and
cause injury beyond immediate area of operation.
Hold the power tool by insulated gripping
surfaces only, when performing an operation
where the cutting accessory may contact hidden
wiring or its own cord. Cutting accessory contacting
a “live” wire may make exposed metal parts of the
power tool “live” and could give the operator an
electric shock.
Position the cord clear of the spinning accessory.
If you lose control, the cord may be cut or snagged
and your hand or arm may be pulled into the spinning
Never lay the power tool down until the accessory
has come to a complete stop. The spinning accessory
may grab the surface and pull the power tool out of
your control.
m. Do not run the power tool while carrying it at your
side. Accidental contact with the spinning accessory
could snag your clothing, pulling the accessory into
your body.
n. Regularly clean the power tool’s air vents. The
motor’s fan will draw the dust inside the housing
and excessive accumulation of powdered metal may
cause electrical hazards.
o. Do not operate the power tool near flammable
materials. Sparks could ignite these materials.
p. Do not use accessories that require liquid coolants.
Using water or other liquid coolants may result in
electrocution or shock.
Kickback and Related Warnings
Kickback is a sudden reaction to a pinched or snagged
rotating wheel, backing pad, brush or any other accessory.
Pinching or snagging causes rapid stalling of the
rotating accessory which in turn causes the uncontrolled
power tool to be forced in the direction opposite of the
accessory’s rotation at the point of the binding. For
example, if an abrasive wheel is snagged or pinched by
the workpiece, the edge of the wheel that is entering into
the pinch point can dig into the surface of the material
causing the wheel to climb out or kick out. The wheel may
either jump toward or away from the operator, depending
on direction of the wheel’s movement at the point of
pinching. Abrasive wheels may also break under these
conditions. Kickback is the result of power tool misuse
and/or incorrect operating procedures or conditions and
can be avoided by taking proper precautions as given
a. Maintain a firm grip on the power tool and position
your body and arm to allow you to resist kickback
forces. Always use auxiliary handle, if provided, for
maximum control over kickback or torque reaction
during start-up. The operator can control torque
reactions or kickback forces, if proper precautions
are taken.
b. Never place your hand near the rotating accessory.
Accessory may kickback over your hand.
Do not position your body in the area where power
tool will move if kickback occurs. Kickback will propel
the tool in direction opposite to the wheel’s movement
at the point of snagging.
d. Use special care when working corners, sharp edges
etc. Avoid bouncing and snagging the accessory.
Corners, sharp edges or bouncing have a tendency to
snag the rotating accessory and cause loss of control
or kickback.
Do not attach a saw chain woodcarving blade or
toothed saw blade. Such blades create frequent
kickback and loss of control.
Safety Warnings Specific for Grinding:
a. Use only wheel types that are recommended for your
power tool and the specific guard designed for the
selected wheel. Wheels for which the power tool was
not designed cannot be adequately guarded and are
b. The grinding surface of centre depressed wheels
must be mounted below the plane of the guard lip.
An improperly mounted wheel that projects through
the plane of the guard lip cannot be adequately
The guard must be securely attached to the power
tool and positioned for maximum safety, so the least
amount of wheel is exposed towards the operator. The
guard helps to protect operator from broken wheel
fragments and accidental contact with wheel and
sparks that could ignite clothing.
d. Wheels must be used only for recommended
applications. For example: do not grind with the side
of cut-off wheel. Abrasive cut-off wheels are intended
for peripheral grinding, side forces applied to these
wheels may cause them to shatter.
Always use undamaged wheel flanges that are of
correct size and shape for your selected wheel.
Proper wheel flanges support the wheel thus reducing
the possibility of wheel breakage. Flanges for cut-off
wheels may be different from grinding wheel flanges.
Do not use worn down wheels from larger power
tools. Wheel intended for larger power tool is not
suitable for the higher speed of a smaller tool and
may burst.
The G720G angle grinders have been designed for
professional grinding applications.
6. Electrical safety
Your tool is double insulated; therefore no earth
wire is required. Always check that the main
voltage corresponds to the voltage on the rating plate.
Warning! If the power cord is damaged, it must
be replaced by the manufacturer, authorized
Black & Decker Service Center or an equally
qualified person in order to avoid damage or
injury. If the power cord is replaced by an
equally qualified person, but not authorized by
Black & Decker, the warranty will not be valid.
7. Labels on tool
The label on your tool may include the following symbols:
Use Eye
Hz .......
W ........
min .....
Use Ear
V ........
A ........
1. Slider switch
2. Cable
3. Keyless guard
Safety Alert
Rated Speed
n .......
...... Class II
or Reciprocation per
4. Body grip
5. Side handle (3 positions)
6. Spindle lock button
1. Open the guard latch (M). Align the lugs (N) on the guard
with the slots (O) on the gear case.
2. Push the guard down until the guard lugs engage and rotate
freely in the groove on the gear case hub.
3. With the guard latch open, rotate the guard (I) into the
desired working position. The guard body should be
positioned between the spindle and the operator to provide
maximum operator protection.
4. Close the guard latch to secure the guard on the gear case.
You should not be able to rotate the guard by hand when
the latch is closed. Do not operate the grinder with a loose
guard or the clamp lever in open position.
5. To remove the guard, open the guard latch, rotate the guard
so that the arrows are aligned and pull up on the guard.
NOTE: The guard is pre-adjusted to the diameter of the gear
case hub at the factory. If, after a period of time, the guard
becomes loose, tighten the adjusting screw (P) with clamp
lever in the closed position.
CAUTION: If the guard cannot be tightened
by the adjusting screw, do not use the tool.
To reduce the risk of personal injury, take the
tool and guard to a service centre to repair or
replace the guard.
Use the guard and ensure it is fitted correctly.
Check mounting flanges and the disc are correctly
fitted and are undamaged.
Ensure you are using the correct size and type of disc
for the task.
Ensure the disc are rated in excess of the spindle rpm
of your angle grinder. Allow a newly assembled wheel
to idle off-load for 30 seconds before starting any
Operating your angle grinder (Fig. A)
To switch on, push the slider switch forward (1). To switch
off, press the rear of the slider switch.
Fitting the discs (Fig. B and C)
Proceed as follows:
Disconnect the plug from the electricity supply.
Ensure the guard is fitted. Place the inner flange (7)
on the spindle. Ensure it is located on the two flats.
Place the abrasive disc on the spindle and inner
flange (8). Ensure it is correctly located.
Fit the threaded outer flange (9), making sure it is
facing in the correct direction for the type of disc fitted.
For grinding discs, the flange (9) is fitted with the
raised portion facing towards the disc. For cutting
discs, the flange (9) is fitted with the inner portion
facing away from the disc.
Hold the spanner on the flats of the spindle to prevent
rotation of the disc and tighten the outer flange with
the spanner provided.
Press in the spindle lock button and rotate the spindle
until it locks (Fig. C). Keeping the lock button pressed
in, tighten the outer flange with the spanner provided.
Handy hints (Fig. D)
Hold your angle grinder firmly with one hand around the
side handle and the other around the body of your angle
Always position the guard so that as much of the
exposed disc as possible is pointing away from you.
Be prepared for a stream of sparks when the disc
touches the metal.
When grinding, always maintain the correct angle between
the disc and the work surface (15°)(Fig. D). This increases
the removal capacity of the disc and avoids unnecessary
Overloading will cause damage to the motor of your angle
grinder. This can happen if your angle grinder is subjected
to heavy duty use for prolonged periods of use. Do not in
any circumstances, attempt to exert too much pressure on
your angle grinder to speed up your work. The abrasive
discs operate more efficiently when a light pressure is
exerted, thus avoiding a drop in the speed of your angle
Keep guards, air vents and the motor housing as clear
as possible of dust and dirt. Wipe with a clean cloth and
blow through with a low-pressure air supply. Excessive
build-up of metal dust can cause tracking of electrical
current from the internal parts to exposed metal parts.
Do not overload your angle grinder. Overloading causes
a reduction in speed and efficiency, causing your angle
grinder to become too hot. If this happens, operate your
angle grinder under no load for one or two minutes until
it has cooled to normal operating temperature. Switching
your angle grinder off under load will reduce the life of the
Local regulations may provide for separate collection of elec trical products from the household, at municipal waste sites or
by the retailer when you purchase a new product.
Black & Decker provides a facility for the collection and
recycling of Black & Decker products once they have reached
the end of their working life. To take advantage of this service
please return your product to any authorised repair agent who
will collect them on our behalf.
You can check the location of your nearest authorised repair
the address indicated in this manual. Alternatively, a list of
authorised Black & Decker repair agents and full details of our
after-sales service and contacts are available on the Internet
at: www.2helpU.com
Black & Decker’s policy is one of continuous
improvement to our products and, as such, we reserve
the right to change product specifications without prior
Standard equipment and accessories may vary by
Product specifications may differ by country.
Complete product range may not be available in all
Use only mild soap and a slightly damp cloth to clean your
angle grinder. Many household cleaners contain chemicals
which could seriously damage the plastic. Also, do not
use petrol, turpentine, lacquer or paint thinners or similar
products. Never let any liquid get inside the tool and never
immerse any part of the tool into liquid.
Important! To assure product SAFETY and RELIABILITY,
repairs, maintenance and adjustment (other than those
listed in this manual) should be performed by authorized
service centers or other qualified service personnel,
always using identical replacement parts.
Separate collection. This product must not be
disposed of with normal household waste.
needs replacement, or if it is of no further use to you, do not
dispose of it with household waste. Make this product avail able for separate collection.
Separate collection of used products and packaging
allows materials to be recycled and used again.
Re-use of recycled materials helps prevent environmental pollution and reduces the demand for raw
Black & Decker declares that these products described under
"technical data" are in compliance with:
2006/42/EC, EN 60745-1, EN 60745-2-3
These products also comply with Directive 2004/108/EC and
2011/65/EU. For more information, please contact Black &
Decker at the following address or refer to the back of the
The undersigned is responsible for compilation of the technical
Kevin Hewitt
Vice-President Global Engineering
Black & Decker Europe, 210 Bath Road, Slough,
Berkshire, SL1 3YD, United Kingdom
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