Bosch GBM9-16 Operating/Safety Instructions

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Operating/Safety Instructions
Consignes de fonctionnement/sécurité

Instrucciones de funcionamiento y seguridad

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GBM9-16

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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.

Electrical safety

Power tool plugs must match the outlet.
Never modify the plug in any way. Do not
us e any ada p t e r plugs w i th eart h e d
(grounded) power tools. Unmodified plugs

an d ma tchin g ou tlets wil l re d uce ris k o f
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 Ground Fault Circuit
Interrupter (GFCI) protected supply. Use of

an GFCI reduces the risk of electric shock.

Personal safety

Stay alert, watch what you are doing and
us e c ommon se nse when o pera ting 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

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 mains-operated (corded) power tool or
battery-operated (cordless) power tool.

General Power Tool Safety Warnings

Safety Symbols

The definitions below describe the level of severity for each signal word. Please read the manual

and pay attention to these symbols.

!

This is the safety alert symbol. It is used to alert you to potential
personal injury hazards. Obey all safety messages that follow this
symbol to avoid possible injury or death.

DANGER indicates a hazardous situation which, if not avoided, will
result in death or serious injury.

WARNING indicates a hazardous situation which, if not avoided, will
result in death or serious injury.

CAUTION, used with the safety alert symbol, indicates a hazardous
situation which, if not avoided, will result in minor or moderate injury.

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hat, or hearing protection used for appropriate
conditions will reduce personal injuries.

Prevent unintentional starting. Ensure the
s

wi tch is in the off-p ositi on bef ore
connecting to power source and / or battery
pa ck, pic king up o r c arryi ng the too l.

Carrying power tools with your finger on the
switch or energizing 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

co n trol of the powe r to o l in une x pected
situations.

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.

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.

Power tool use and care

Do not forc e the powe r 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

ca n n o t be contro l l e d wit h the swi t c h is

dangerous and must be repaired.

Disconnect the plug from the power source
and/or the battery pack from the power tool
b

efore 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.

Ma n y a c c i dents are caus e d b y p o o r ly
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 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
re p a i r p e r s on u s ing o n ly i d e ntical
replacement parts. This will ensure that the

safety of the power tool is maintained.

Use auxiliary handle(s), if supplied with the
tool. Loss of control can cause personal injury.

Hold power tool by in sulated gripp ing
surfaces, when performing an operation
where the cutting accessory may contact
hidden wiring or its own co rd. Cutting

accessory contacting a "live" wire may make
exposed metal parts of the power tool "live"
and could give the operator an electric shock.

Use clamps or another practical way to
secure and support the workpiece to a
stable platform. Holding the work by hand

or against your body leaves it unstable and
may lead to loss of control.

Secure the material being drilled. Never
hold it in your hand or acro s s legs.

Unstable support can cause the drill bit to
bind causing loss of control and injury.

Do not drill, fasten or break into existing
walls or other blind areas where electrical
wiring ma y ex i s t. If this si t u a t i on is

unavoidable, disconnect all fuses or circuit
breakers feeding this worksite.

Always wear safety goggl e s o r ey e
protection when using this tool. Use a
dust mask or respirator for applications
which generate dust.

Position the cord clear of rotating bit. Do
not wrap the cord around your arm or
wrist. If you lose control and have the cord

wrapped around your arm or wrist it may
entrap you and cause injury.

Safety Rules for Drills

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Position yourself to avoid being caught
between the tool or side handle and walls
or posts. Should the bit become bound or

jammed in the work, the reaction torque of
the tool could crush your hand or leg.

If the bit becomes bound in th e
workpiece, release th e tr i g g e r
im m ediat e ly, r e verse the dire c tion o f
rotation and slowly squeeze the trigger to
back out the bit. Be ready for a strong

reaction torque. The drill body will tend to
twist in the opposite direction as the drill bit is
rotating.

Do not grasp the tool or place your hands
too close to the spinning chuck or drill
bit. Your hand may be lacerated.

When installing a drill bit, insert the shank
of the b i t well w i t h i n the ja w s of t h e
chuck. If th e bit is no t inserted deep

enough, the grip of the jaws over the bit is
reduced and the loss of control is increased.

Do not u se du l l or dam a ged b i t s an d
accessories. Dull or damaged bits have a

greater tendency to bind in the workpiece.

When removing the bit from the tool avoid
contact with s k i n a n d us e p roper
protective gloves when grasping the bit or
accessory. Accessories may be hot after

prolonged use.

Check to see th at k eys and adjus ting
wr e n c h e s are r e m o v e d from t h e drill
before switching the tool "ON". Keys or

wr e n c h e s can f l y away a t high v e l o c i t y
striking you or a bystander.

Do not run the drill while carrying it at
your side. A spinning drill bit could become

entangled with clothing and injury may result.

This tool may be used with sanding and
polish ing disks, grinding wheels, wire
wheel a n d w i r e cup b r u s hes. These
accessories must be rated for at least the
speed recommended on the tool warning
label. Wheel s an d other ac c e s sories

running over rated speed can fly apart and
cause injury.

Avoid bouncing and snagging the wheels,
discs or brushes especially when working
corners, sharp edges, etc. This can cause

loss of control and kickback.

Safety Rules for Mixers

Do n ot mix food. Power tools and the ir

accessories are not designed for processing
food.

The mixing container must be suitable for
mi x ing an d must s t and se c urely . A

container that is not properly secured may
move uncontrolled.

Follow the instructions and warnings in the
Material Safety Data Sheets (MSDS) of the
material to be mixed. Material to be mixed

may be harmful.

Do not use this tool for mixing corrosive
(acids), explosive or combustible materials.

The machine is intended for mixing pulverized
building materials such as mortar, plaster,
adhe sives, a s well as sol vent free pai nt,
varnish and similar substances.

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GFCI and personal protection devices like
electrician’s rubber gloves and footwear will
further enhance your personal safety.

Do not use AC only rated tools with a DC
power supply. While the tool may appear to

work, the electrical components of the AC
rated tool are likely to fail and create a hazard
to the operator.

Keep handles dry, clean and free from oil
and grease. Slippery hands cannot safely

control the power tool.

Use clamps or other practical way to secure
and support t he workpiece to a stable
platform. Holding the work by hand or against

your body is unstable and may lead to loss of
control.

Develop a periodic maintenance schedule
for your t ool. When cleani ng a tool be
careful not to disassemble any portion of
th e tool sin ce inter nal wir es may be
misplaced or pinched or safety guard return
sp ring s may be imp roper ly mounte d.

Certain cleaning agents such as gasoline,
carbon tetrachloride, ammonia, e tc. may
damage plastic parts.

Risk of injury to user. The power cord must only
be serviced by a Bosch Factory Service Center
or Autho rized Bosch Service Station.

Due to high torque, this

tool should not be used

for driving screws or threaded nuts.

Some dust creat ed by

power sanding, sawing,
grinding, drilling, and other construction
activities contains chemicals known to
ca use ca ncer , b irth defects or other
reproductive harm. Some examples of
these chemicals are:

• Lead from lead-based paints,

• Crystalline silica from bricks and cement and

other masonry products, and

• Arsenic an d chromium f rom chemical ly-

treated lumber.

Yo u r risk f r o m thes e exp o s u res va r i e s ,
depending on how often you do this type of
work. To reduce your expos ure to these
chemicals: work in a well ventilated area, and
work with approved safety equipment, such as
those dust masks that are specially designed
to filter out microscopic particles.

Additional Safety Warnings

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Symbols

IMPORTANT: Some of the following symbols may be used on your tool. Please study them

and learn their meaning. Proper interpretation of these symbols will allow you to operate the
tool better and safer.

Symbol Designation / Explanation

V Volts (voltage)

A Amperes (current)

Hz Hertz (frequency, cycles per second)

W Watt (power)

kg Kilograms (weight)

min Minutes (time)

s Seconds (time)

Diameter (size of drill bits, grinding wheels, etc.)

n

0

No load speed (rotational speed at no load)

n Rated speed (maximum attainable speed)

.../min

Revolutions or reciprocation per minute (revolutions, strokes, surface speed,
orbits etc. per minute)

0 Off position (zero speed, zero torque...)

1, 2, 3, ...

I, II, III,

Selector settings (speed, torque or position settings. Higher number means
greater speed)

0

Infinitely variable selector with off (speed is increasing from 0 setting)

Arrow (action in the direction of arrow)

Alternating current (type or a characteristic of current)

Direct current (type or a characteristic of current)

Alternating or direct current (type or a characteristic of current)

Class II construction (designates double insulated construction tools)

Earthing terminal (grounding terminal)

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Symbols (continued)

IMPORTANT: Some of the following symbols may be used on your tool. Please study them

and learn their meaning. Proper interpretation of these symbols will allow you to operate the
t

ool better and safer.

Symbol Designation / Explanation

Designates Li-ion battery recycling program

Designates Ni-Cad battery recycling program

Alerts user to read manual

Alerts user to wear eye protection

This symbol designates that this tool is listed by Underwriters Laboratories.

This symbol designates that this component is recognized by Underwriters
Laboratories.

This symbol designates that this tool is listed by Underwriters Laboratories,
to United States and Canadian Standards.

This symbol designates that this tool is listed by the Canadian Standards
Association.

This symbol designates that this tool is listed by the Canadian Standards
Association, to United States and Canadian Standards.

This symbol designates that this tool is listed by the Intertek Testing
Services, to United States and Canadian Standards.

This symbol designates that this tool complies to NOM Mexican Standards.

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Functional Description and Specifications

Disconnect the plug fr om the p ower source before making any
assembly, adjustments or changing accessories. Such preventive

s

afety measures reduce the risk of starting the tool accidentally.

NOTE: For tool specifications refer to the nameplate on your tool.

REVERSING

SWITCH BUTTON

TOP AUXILIARY

HANDLE

(INSULATED

GRIPPING
SURFACE)

REAR AUXILIARY

HANDLE

(INSULATED

GRIPPING SURFACE)

MAIN HANDLE

(INSULATED GRIPPING

SURFACE)

Mixer

VARIABLE SPEED

CONTROLLED

TRIGGER SWITCH

VENTILATION

OPENINGS

CHUCK

CHUCK KEY

STORAGE AREA

CHUCK KEY

Model No. GBM9-16

Voltage rating 120 V ~ 60 Hz

Amperage rating 9 A

No Load Speed (n0) 0-700 /min

Rated torque 7.2 ft lb (9.8 N m)

Chuck clamping range 1/8 - 5/8” (3-16 mm)

Max. Drill bit Ø for wood 1.5” (40 mm)

Max. Drill bit Ø for steel 5/8” (16 mm)

Maximum stirrer paddle diameter 6.3” (160 mm)

Conforms to
UL Standard No. 60745-1
and 60745-2-1

Certified to
CAN/CSA Standard C22.2
No. 60745-1 and 60745-2-1

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Assembly

Disconnect the plug from

the power source before
maki ng any assembly, adjustm ents or
changing acce ssories. Such pr eventive

safety measures reduce the risk of starting the
tool accidentally.

INSERTING BIT

For small bits, open jaws enough to insert the
bit up to the flutes. For large bits, insert the bit
as far as it will go. Center the bit as you close

th e ja ws b y hand. This p osit ions the bit
properly, giving maximum contact between the
chuck jaws and the bit shank.

To tighten chuck, insert key into each of the
three key holes in succession and tighten
clockwise firmly. The chuck can be released by
using one hole only (Fig. 2).

FIG. 2

Counter

Clockwise

Clockwise

AUXILIARY HANDLES

The tool must be supported with one of the
auxiliary handles.

Attach securely the top auxiliary handle by
screwing it into the thread on top of the motor
housing (Fig. 3)

The rear auxiliary handle can be rotated 360°
around the axis of the tool.

360°

FIG. 3

TOP AUXILIARY

HANDLE

REAR AUXILIARY

HANDLE

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REVERSING SWITCH BUTTON

The reversing switch button is located above
the trigger s witch and is u sed to rever se
rotation of the bit. For forward rotation, (with the
chuck pointed away from you and the power
cord side positioned down) move button to the
far left. For reverse rotation move the button to
the far right (Fig. 4).

Do not change direction of

rotation until the tool comes
to a complete stop. Shifting during rotation of
the chuck can cause damage to the tool.

CHUCK KEY AND KEY HOLDER

Your tool is equipped with chuck key that can
be conveniently located on the cord protector
where it is always handy and unlikely to get lost
or misplaced (Fig. 1).

Operating Instructions

VARIABLE SPEED CONTROLLED

TRIGGER SWITCH

Your tool is equipped with a variable speed trigger
switch. The tool can be turned ON or OFF by
squeezing or releasing the trigger. The speed
can be adjusted from the minimum to maximum

nameplate RPM by the movement of the trigger
towards the handle, controlled by the pressure
applied to the trigger. Apply more pressure to
increase the speed and release pressure to
decrease speed (Fig. 1).

FIG. 4

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Operating Tips

WORK INSTRUCTIONS FOR DRILLING

You will extend the life of your bits and do
neater work if you always put the bit in contact
with the work before pulling the trigger. During
the oper a tion, hold the tool firmly and exert
light, steady pressure. Too much pressure at
low speed will stall the tool. Too little pressure
will keep the bit from cutting and cause excess
friction by sliding over the surface. This can be
damaging to both tool and bit.

DRILLING WITH VARIABLE SPEED

The trigger controlled variable speed feature
will eliminate the need for center punches in
hard materials. The variable speed trigger
allows you to slowly increase RPM. By using a
slow starting speed, you are able to keep the
bit from “wander ing”. You can increase the
speed a s the bit “ bites” into th e work b y
squeezing the trigger.

DRILL BITS

Always inspect drill bits for excessive wear.
Use only bits that are s harp an d in good
condition.

TWIS T BITS: Availabl e with straight and
reduced shanks for wood and light duty metal
drilling. High speed bits cut faster and last
longer on hard ma terials.

DRILLING IN WOOD

Be certain workpiece is clamped or anchored
firm ly. Always apply pressure in a straight line
with the drill bit. Maintain enough pressure to
keep the drill “biting”.

When drilling holes in wood, twist bits can be
used. Twist bits may overheat unless pulled out
frequently to clear chips from flutes.

Use a “back-up” block of wood for work that is
likely to splinter, such as thin materials.

You will drill a cleaner hole if you ease up on
the pressure just before the bit breaks through
the wood. Then complete the hole from the
back side.

DRILLING IN METAL

There are two rules for drilling hard materials.
First, the harder the material, the greater the
pres sure you need to apply to the tool. Second,
the harder the material, the slower the speed.
Here are a couple of tips for drilling in metal.
Lubri cate the tip of the bit occasionally with
cutting oil except when drilling soft metals such
as alu minum, cop per or cast iron. If the hole to
be drilled is fairly large, drill a smaller hole first,
then enlarge to the required size, it’s often
fa ster in the long run. Mai n ta in eno ugh
pressure to assure that the bit does not just
spin in the hole. This will dull the bit and greatly
shorten its life.

WORK INSTRUCTIONS FOR MIXING

When using this tool for

mi xing l iqui d, or dry
powder ed or gra nulated materials, fo llow
ma teri al man u fact urer i nstr uctio ns and
precautions.

• Do not run the power tool on a stand.

• Avoid splashing around the material being

stirred to prevent slipping and losing control
over the power tool.

• Avoid prolonged use of the power tool at
lower speeds. Otherwise the motor of the
power tool could overheat.

Selection of the stirrer paddle is dependent on
the material that is to be stirred.

For materials with low viscosity, e. g. emulsion

paint, varnishes, adhesive, grouting compound,
cement slurry, use a stirrer paddle with a left­hand spiral. The material is moved from the top
downwards in a stirrer paddle with a left-hand
spiral. The stirrer paddle is pushed upwards.
Materials with low viscosity are mixed in a way
which minimizes splattering.

For materials with high viscosity, e. g. plaster,
concrete, cement, screed, filler, epoxy resin,
use a stirrer paddle with right-hand spiral. The
material is moved from the bottom upwards in a
stirrer paddle with a right-hand spiral. The
stirrer paddle works its way into the mixture.
Ma teri als wi th high visco sity are mixe d
thoroughly.

While mixing, move the power tool in an up and
down motion. Clean the stirrer paddle after use.

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