Bosch Power Tools 1773AK User Manual
Operating/Safety Instructions
Consignes de fonctionnement/sécurité
Instrucciones de funcionamiento
y seguridad
IMPORTANT: IMPORTANT : IMPORTANTE:
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Renseignement des consommateurs
Información para el consumidor
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1773AK
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Read and understand all instructions. Failure to follow all instructions
listed below, may result in electric shock, fire and/or serious personal injury.
SAVE THESE INSTRUCTIONS
-2-
Work Area
Keep your work area clean and well lit.
Cluttered benches and 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 by-standers, children, and visitors
away while operating a power tool.
Distractions can cause you to lose control.
Electrical Safety
Double Insulated tools are equipped with
a polarized plug (one blade is wider than
the other.) This plug will fit in a polarized
outlet only one way. If the plug does not
fit fully in the outlet, reverse the plug. If it
still does not fit, contact a qualified
electrician to install a polarized outlet. Do
not change the plug in any way. Double
Insulation eliminates the need for the
three wire grounded power cord and
grounded power supply system. Before
plugging in the tool, be certain the outlet
voltage supplied is within the voltage marked
on the nameplate. Do not use “AC only”
rated tools with a DC power supply.
Avoid body contact with grounded
surfaces such as pipes, radiators, ranges
and refrigerators. There is an increased
risk of electric shock if your body is
grounded. If operating the power tool in
damp locations is unavoidable, a Ground
Fault Circuit Interrupter must be used to
supply the power to your tool. Electrician’s
rubber gloves and footwear will further
enhance your personal safety.
Don't 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 to carry the tools or pull the plug
from an outlet. Keep cord away from
heat, oil, sharp edges or moving parts.
Replace damaged cords immediately.
Damaged cords increase the risk of electric
shock.
When operating a power tool outside, use
an outdoor extension cord marked "W-A"
or "W." These cords are rated for outdoor
use and reduce the risk of electric shock.
Refer to “Recommended sizes of Extension
Cords” in the Accessory section of this
manual.
Personal Safety
Stay alert, watch what you are doing and
use common sense when operating a
power tool. Do not use tool while tired or
under the influence of drugs, alcohol, or
medication. A moment of inattention while
operating power tools may result in serious
personal injury.
Dress properly. Do not wear loose
clothing or jewelry. Contain long hair.
Keep your hair, clothing, and gloves away
from moving parts. Loose clothes, jewelry,
or long hair can be caught in moving parts.
Keep handles dry, clean and free from oil
and grease.
Avoid accidental starting. Be sure switch
is “OFF” before plugging in. Carrying tools
with your finger on the switch or plugging in
tools that have the switch “ON” invites
accidents.
Remove adjusting keys or wrenches
before turning the tool “ON”. A wrench or
a key that is left attached to a rotating part
of the tool may result in personal injury.
Do not overreach. Keep proper footing
and balance at all times. Proper footing
and balance enables better control of the
tool in unexpected situations.
Use safety equipment. Always wear eye
protection. Dust mask, non-skid safety
shoes, hard hat, or hearing protection must
be used for appropriate conditions.
!
WARNING
Power Tool Safety Rules
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Concrete Surfacer Safety Rules
Tool Use and Care
Use clamps or other practical way to
secure and support the workpiece to a
stable platform. Holding the work by hand
or against your body is unstable and may
lead to loss of control.
Do not force tool. Use the correct tool for
your application. The correct tool will do
the job better and safer at the rate for which
it is designed.
Do not use tool if switch does not turn it
“ON” or “OFF”. Any tool that cannot be
controlled with the switch is dangerous and
must be repaired.
Disconnect the plug from the power
source before making any adjustments,
changing accessories, or storing the tool.
Such preventive safety measures reduce the
risk of starting the tool accidentally. Store
idle tools out of reach of children and
other untrained persons. Tools are
dangerous in the hands of untrained users.
Maintain tools with care. Keep cutting
tools sharp and clean. Properly maintained
tools, with sharp cutting edges are less likely
to bind and are easier to control. Any
alteration or modification is a misuse and
may result in a dangerous condition.
Check for misalignment or binding of
moving parts, breakage of parts, and any
other condition that may affect the tools
operation. If damaged, have the tool
serviced before using. Many accidents are
caused by poorly maintained tools. Develop
a periodic maintenance schedule for your
tool.
Use only accessories that are
recommended by the manufacturer for
your model. Accessories that may be
suitable for one tool,
may become hazardous
when used on another tool.
Service
Tool service must be performed only by
qualified repair personnel. Service or
maintenance performed by unqualified
personnel could result in a risk of injury. For
example: internal wires may be misplaced or
pinched, safety guard return springs may be
improperly mounted.
When servicing a tool, use only identical
replacement parts. Follow instructions in
the Maintenance section of this manual.
Use of unauthorized parts or failure to follow
Maintenance Instructions may create a risk
of electric shock or injury. Certain cleaning
agents such as gasoline, carbon
tetrachloride, ammonia, etc. may damage
plastic parts.
Always use proper guard with grinding
wheel. A guard protects operator from
broken wheel fragments and swarf from
grinding.
Accessories must be rated for at least the
speed recommended on the tool warning
label. Wheels and other accessories
running over rated speed can fly apart and
cause injury. Grinding wheels must have a
maximum safe operating speed greater than
the “no load RPM” marked on the tool’s
nameplate.
Hold tool by insulated gripping surfaces
when performing an operation where the
cutting tool may contact hidden wiring or
its own cord. Contact with a "live" wire will
make exposed metal parts of the tool "live"
and shock the operator.
Always use auxiliary handle for maximum
control over torque reaction or kickback.
Avoid bouncing and snagging the wheel,
especially when working corners, sharp
edges etc. Operation of the concrete
surfacer without the side handle could cause
loss of control, resulting in possible serious
personal injury.
Before using the surfacer or installing a
new wheel, inspect the surface grinding
wheel for chips, cracks or missing
segments. Remove damaged or worn
wheels immediately. Run the tool at no
load for one minute, holding the tool in
the direction away from people. Wheels
with flaws will normally break apart during
this time.
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Carefully handle both the tool and
individual surface grinding wheels to
avoid chipping or grinding or surfacing.
Do not use a wheel that may be damaged.
Fragments from a wheel that bursts during
operation will fly away at great velocity
possibly striking you or bystanders.
Do not use surface grinding wheel that is
larger than the maximum recommended
size for your tool. The guard for a concrete
surfacer is limited to the rated size of the
machine, use of larger or unauthorized wheel
accessories may lead to injury.
Only use dry diamond surfacing cup
wheels with the concrete surfacer. The
concrete surfacer is not intended for use
with standard grinding, cut off, cup
wheels or wire brushes. Use of other
accessories may cause injury.
Wear proper apparel while using a
concrete surfacer. Use thick cushioned
gloves and wear ear protectors when
using the tool and limit the exposure time
by taking frequent rest periods. Face
shield or at least safety goggles, dust
mask, leather gloves and shop apron
capable of stopping small wheel or
workpiece fragments. Prolonged exposure
to high intensity noise can cause hearing
loss. Vibration caused by surface grinding
action may be harmful to your hands and
arms.
Position the cord clear of the spinning
surface grinding wheel. 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.
When removing the surface grinding
wheel from the tool avoid contact with
skin and use proper protective gloves
when grasping the accessory.
Accessories may be hot after prolonged use.
Do not run the tool while carrying it at
your side. A spinning wheel could become
entangled with clothing and injury may
result.
Regularly clean the tools air vents by
compressed air. Excessive accumulation
of powdered metal inside the motor housing
may cause electrical failures.
Do not grind or sand near flammable
materials. Sparks from the wheel could
ignite these materials.
Some dust created by
power sanding, sawing,
grinding, drilling, and other construction
activities contains chemicals known to
cause cancer, birth 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 and chromium from chemicallytreated lumber.
Your risk from these exposures varies,
depending on how often you do this type of
work. To reduce your exposure 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.
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!
WARNING
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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 Name Designation/Explanation
V Volts Voltage (potential)
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
.../min Revolutions or reciprocation per minute Revolutions, strokes, surface speed,
orbits etc. per minute
0 Off position Zero speed, zero torque...
1, 2, 3, ... Selector settings Speed, torque or position settings.
I, II, III, Higher number means greater speed
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
Warning symbol Alerts user to warning messages
Ni-Cad RBRC seal Designates Ni-Cad battery recycling
program
Symbols
0
This symbol designates
that this tool is listed by
Underwriters Laboratories.
This symbol designates
that this tool is listed by
the Canadian Standards
Association.
This symbol designates
that this tool is listed to
Canadian Standards by
Underwriters Laboratories.
This symbol
designates
that
this tool
complies
to NOM
Mexican
Standards.
This symbol designates
that this tool is listed by
Underwriters Laboratories,
and listed to Canadian
Standards by Underwriters
Laboratories.
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Functional Description and Specifications
Disconnect the plug from the power source before making any
assembly, adjustments or changing accessories. Such preventive safety
measures reduce the risk of starting the tool accidentally.
!
WARNING
Concrete Surfacer
Model number 1773AK
Dry diamond cup wheel diameter 5" (127 mm)
VENTILATION
OPENINGS
SWITCH
BUTTON
SERVICE
REMINDER
LIGHT
AUXILIARY HANDLE
SPINDLE
LOCK
VACUUM HOSE
(Optional Accessory)
GUARD WITH
BRUSH INSERT
FIG. 1
NOTE: For tool specifications refer to the nameplate on your tool.
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REMOVING AND INSTALLING
GRINDING WHEELS
1. Depress the spindle lock button to
prevent the wheel form rotating.
2. Loosen the lock nut with the wrench
provided, and remove lock nut and dry
diamond cup wheel (fig. 2).
3. Clean backing flange, spindle, lock nut,
and guard with brush insert.
4. Place new dry diamond cup wheel onto
the spindle. Depress spindle lock and thread
lock nut onto spindle, and securely tighten
lock nut with the wrench provided.
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Assembly
BACKING
FLANGE
REPLACING BRUSH INSERT
1. With the dry diamond cup wheel
mounted, locate separation in brush insert.
2. Carefully begin prying and lifting brush
insert where separation begins, with a flat tip
screwdriver and remove brush insert (Fig. 3).
3. Carefully press new brush insert into
recess in guard until it stops on shoulder of
guard.
NOTE: Always be sure that the bristles on
the brush insert are not lying in the recess,
when installing the brush insert.
WHEEL
GUARD
WHEEL
GUARD
BRUSH
INSERT
DRY
DIAMOND
CUP WHEEL
LOCK NUT
LOCK NUT
WRENCH
FIG. 2
FIG. 3
SPINDLE
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SLIDE ON-OFF SWITCH WITH LOCK
The tool is switched “ON” by the switch
button located at the side of the motor
housing. The switch can be locked in the
“ON” position, a convenience for long
grinding operations.
TO TURN THE TOOL “ON” without locking
it, slide the switch button forward by
applying pressure ONLY at the REAR
portion of the button. When pressure is
released the switch button will snap to
“OFF” position.
TO LOCK THE SWITCH “ON”, slide the
switch button forward and press “IN” the
FRONT portion.
TO UNLOCK THE SWITCH, simply press
and release the REAR portion of the button.
Switch is spring loaded and will snap back
automatically.
Hold the tool with both
hands while starting the
tool, since torque from the motor can cause
the tool to twist.
Start the tool before applying to work and let
the tool come to full speed before
contacting the workpiece. Lift the tool from
the work before releasing the switch. DO
NOT turn the switch “ON” and “OFF” while
the tool is under load; this will greatly
decrease the switch life.
ELECTRONIC FEEDBACK CIRCUITRY (EFC)
The internal electronic feedback system
provides a "soft start", which will reduce the
stresses that occur from a high torque start.
The system also helps to keep the no load
speed virtually constant between no-load
and load conditions.
OVERLOAD PROTECTION
Your tool is equipped with overload
protection to protect the motor. If the tool
stops during operation TURN OFF SWITCH
IMMEDIATELY and allow the motor to cool
for about 30 seconds by running at no-load.
If the overload protection stops the tool
repeatedly, excessive force is causing the
tool to overload. Don't press so hard and let
the tool do the work.
DUST EXTRACTION
This tool must only be used
with a dust extraction
system. In addition, always wear approved
dust mask.
Your tool is equipped with a dust port for
dust extraction. To use this feature, attach
vacuum hose (optional accessory) to the
dust port, and connect the opposite end of
the hose to a shop vacuum cleaner.
Always make sure the vacuum cleaner that
you use is designed for extraction of
masonry dust.
AUXILIARY HANDLE
The auxiliary handle, used to guide and
balance the tool can be bolted to either side
of the spindle housing depending on
personal preference and comfort. Always
use the auxiliary handle for maximum control
and ease of operation.
-8-
Tool Tips
!
WARNING
Operating Instructions
This tool is intended for grinding, deburring
and smoothing mainly mineral materials
such as, for example, concrete, stone,
marble and poured flooring without the use
of water. It also can be used for removing
protective coating and adhesive residue.
Do not use water or other cooling fluid with
this tool for grinding.
Allow the tool to reach full speed before
applying it to the workpiece surface.
!
WARNING
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Hold the tool with both hands and apply the
diamond wheel flat on the work surface,
advancing the tool moderately back and
forth.
When removing coatings from work
surfaces, hold the tool at a slight angle to
the workpriece surface. Holding the tool at a
slight angle will not reduce the effect of the
dust extraction.
The dry diamond cup wheel included with
the tool is intended for hard materials.
A dull dry diamond cup wheel can be
sharpened with a abrasive material (e.g.,
chalky sand stone).
Four different types of diamond grinding
wheels are available as optional accessories.
Refer to the chart for examples of their use.
Type of grinding wheel DC DC DC DC
510 520 500 530
Old/hard concrete, x
Flooring, concrete, x
lime plaster, abrasive
concrete, sand stone,
and asphalt
Thermoplastic protec- x
tive coating
Granite, artificial stone, x
universal concrete
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Service
Preventive maintenance
performed by unauthorized
personnel may result in misplacing of
internal wires and components which
could cause serious hazard. We
recommend that all tool service be
performed by a Bosch Factory Service
Center or Authorized Bosch Service Station.
SERVICE REMINDER LIGHT
When the service reminder light lights up or
blinks, this will indicate that the cut-out
carbon brushes will switch off the tool in
approximately 8 hours. After that period, the
light will go off and the tool will stop running.
The tool must then be sent to a service
center for service.
TOOL LUBRICATION
Your Bosch tool has been properly
lubricated and is ready to use. It is
recommended that tools with gears be
regreased with a special gear lubricant at
every brush change.
CARBON BRUSHES
The brushes and commutator in your tool
have been engineered for many hours of
dependable service. To maintain peak
efficiency of the motor, we recommend
every two to six months the brushes be
examined. Only genuine Bosch replacement
brushes specially designed for your tool
should be used.
BEARINGS
After about 300-400 hours of operation, or at
every second brush change, the bearings
should be replaced at Bosch Factory
Service Center or Authorized Bosch Service
Station. Bearings which become noisy (due
to heavy load or very abrasive material cutting) should be replaced at once to avoid
overheating or motor failure.
Cleaning
To avoid accidents always
disconnect the tool from
the power supply before cleaning or
performing any maintenance. The tool may
be cleaned most effectively with
compressed dry air. Always wear safety
goggles when cleaning tools with
compressed air.
Ventilation openings and switch levers must
be kept clean and free of foreign matter. Do
not attempt to clean by inserting pointed
objects through openings.
Certain cleaning agents and
solvents damage plastic
parts. Some of these are: gasoline, carbon
tetrachloride, chlorinated cleaning solvents,
ammonia and household detergents that
contain ammonia.
Maintenance
!
WARNING
!
WARNING
!
CAUTION
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Accessories
If an extension cord is
necessary, a cord with
adequate size conductors that is capable
of carrying the current necessary for your
tool must be used. This will prevent
excessive voltage drop, loss of power or
overheating. Grounded tools must use 3-wire
extension cords that have 3-prong plugs and
receptacles.
NOTE: The smaller the gauge number, the
heavier the cord.
RECOMMENDED SIZES OF EXTENSION CORDS
120 VOLT ALTERNATING CURRENT TOOLS
Tool’s
Ampere
Rating
Cord Size in A.W.G.
Wire Sizes in mm
2
3-6
6-8
8-10
10-12
12-16
18 16 16 14 .75 .75 1.5 2.5
18 16 14 12 .75 1.0 2.5 4.0
18 16 14 12 .75 1.0 2.5 4.0
16 16 14 12 1.0 2.5 4.0 —
14 12 — — — — — —
25 50 100 150 15 30 60 120
Cord Length in Feet Cord Length in Meters
!
WARNING
* Wheel guard
* Brush insert
* Backing flange
* Dry diamond cup wheel
* Lock nut
* Lock nut wrench*
* Auxiliary handle
* Carrying case
** Vacuum hose
(*= standard equipment)
(**= optional accessories)
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