Bosch 1752, 1754, 1757 User Manual
Consumer Information
Renseignement des consommateurs
Información para el consumidor
Toll Free Number: Appel gratuit : Número de teléfono gratuito:
1-877-BOSCH99 (1-877-267-2499) http://www.boschtools.com
Operating/Safety Instructions
Consignes de fonctionnement/sécurité
Instrucciones de funcionamiento
y seguridad
1752
1754
1757
IMPORTANT: IMPORTANT : IMPORTANTE:
Read Before Using Lire avant usage Leer antes de usar
For English Parlez-vous français? ¿Habla español?
See page 2 Voir page 12 Ver página 22
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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.
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.
!
WARNING
Power Tool Safety Rules
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Angle Sander Safety Rules
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.
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 or any other
accessory 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 tools 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 kick-back.
Operation of the grinder without the side
handle could cause loss of control of the
grinder, resulting in possible serious
personal injury.
Always use proper guard with grinding
wheel. A guard protects operator from
broken wheel fragments. This tool can be
converted to a grinder. When converting
your tool from sanding or brushing
operations to grinding operations the proper
guard and wheel flanges MUST be installed
before proceeding with grinding. The guard
must always be attached to the tool and
positioned for maximum safety, so the least
amount of wheel is exposed from the side
the tool is being operated.
Avoid bouncing and snagging the wheel,
especially when working corners, sharp
edges etc. This can cause loss of control
and kick-back.
Wear proper apparel while using a
sander/grinder. Face shield or at least
safety goggles, dust mask, leather gloves
and shop apron capable of stopping small
wheel or workpiece fragments.
When sanding, do not use oversized
sanding disc. Larger sanding disc will
extend beyond the sanding pad causing
snagging, tearing of the disc or kick-back.
Extra paper extending beyond the sanding
pad can also cause serious lacerations.
Position the cord clear of the spinning
grinding wheel or any other sanding
accessory. Do not wrap the cord around
BM 1609929A20 3/03 3/12/03 10:35 AM Page 3
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.
Do not use this tool with a "Woodcarving"
blade. Such blades create frequent kick-
back and loss of control.
When sanding chemically pressure
treated lumber, paint that may be lead
based, or any other materials that may
contain carcinogens, use special
precautions. A suitable breathing respirator
must be worn by all personnel entering the
work area. Work area should be sealed by
plastic sheeting and persons not protected
should be kept out until work area is
thoroughly cleaned.
Do not grind or sand near flammable
materials. Sparks from the wheel could
ignite these materials.
Before using as a grinder or installing a
new wheel, inspect the grinding wheel for
chips and cracks. Remove bad 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.
Carefully handle both the tool and
individual grinding wheels to avoid
chipping or cracking. Install a new wheel
if tool is dropped while grinding. 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 grinding wheel that is larger
than the maximum recommended size for
your tool, or worn down damaged wheels
from larger grinders. Wheels intended for
large angle sander/grinders are not suitable
for the high speed of a small angle
sander/grinder, these wheels may easily
burst and the fragments strike you or
bystanders.
Do not use depressed hub grinding
wheels for cut-off operations. Depressed
hub wheels or type 27 wheels are not
intended for side loading and may shatter
under overload.
Regularly clean the tool's air vents by
compressed air. Excessive accumulation of
powdered metal inside the motor housing
may cause electrical failures.
Direct the discharge of the spinning wire
brush away from you. Small particles and
tiny wire fragments may be discharged at
high velocity during the “cleaning” action
with these brushes and may become
imbedded in your skin.
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 chemically-
treated 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.
-4-
!
WARNING
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-5-
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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-6-
Functional Description and Specifications
SPINDLE LOCK
SIDE HANDLE
MOTOR HOUSING
RELEASE LEVER
(1754 ONLY)
VENTILATION
OPENINGS
PADDLE SWITCH
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
NOTE: For tool specifications refer to the nameplate on your tool.
Model number 1752 1754 1757
Spindle thread 5/8"-11 UNC 5/8"-11 UNC 5/8"-11 UNC
Max. sanding disc 9" Dia. 9" Dia. 9" Dia.
*Max. grinding wheel (Type 27) 9" Dia. 9" Dia. 9" Dia.
*Max. flared cup wheel (Type 11) 5” Dia. 5” Dia. 5” Dia.
Max. wire wheel 6" Dia. 6" Dia. 6" Dia.
Max. wire cup brush 6" Dia. 6" Dia. 6" Dia.
Angle Sanders
SPINDLE
*NOTE: Wheel guard must be used when sander is converted for grinding operations.
MOUNTING FLANGE
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Assembly
-7-
Sanding Accessories Assembly
BACKING PAD
Before attaching a backing
pad be sure its maximum
safe operating speed is not exceeded by the
nameplate speed of the tool.
Wheel guard may not be
used for most sanding
operations. Always reinstall wheel guard
when converting back to grinding
operations.
TO INSTALL BACKING PAD AND
SANDING DISC
Disconnect tool from power source. Set the
tool on its top side (spindle up). Place the
rubber backing pad onto the spindle shaft.
Center the sanding disc on top of the
backing pad. Insert the lock nut through the
disc and thread onto the spindle as far as
you can with your fingers. Press in the
spindle lock, then tighten the backing pad
securely with lock nut wrench.
TO REMOVE BACKING PAD AND
SANDING DISC
Disconnect tool from power source. Using
the lock nut wrench unscrew the nut from
the spindle, while holding spindle lock in.
WIRE BRUSH ASSEMBLY
Before assembling wire brush to this tool,
disconnect from the power source. Wire
brushes are equipped with their own
threaded hub, simply thread on to spindle.
Be sure to seat against shoulder before
turning tool “ON”.
WHEEL GUARD INSTALLATION
Wheel guard must be
attached when using disc
grinding wheels. Always keep wheel guard
between you and your work while grinding.
To attach the wheel guard disconnect tool
from the power source, align wheel guard
locating tab with key way on mounting
flange and slip guard onto mounting flange.
Twist into place, always keep the wheel
guard between you and your work when
grinding. Tighten screw to secure wheel
guard.
LOCK NUT AND BACKING FLANGE
Your tool is equipped with a threaded
spindle for mounting accessories. Always
use the lock nut and backing flange that has
same thread size as spindle.
Disc Grinding Wheel Assembly
Disconnect tool from power source. Be sure
that wheel guard is in place for grinding.
When using spin-on grinding wheels, thread
directly onto the spindle.
When using mounting wheels, thread
BACKING FLANGE onto spindle, then place
GRINDING WHEEL on the spindle. Thread
on the lock nut and tighten nut using a lock
nut wrench provided with adapter kit, while
holding the spindle lock in.
TO REMOVE: Reverse procedure.
!
WARNING
!
WARNING
SPINDLE LOCK
RUBBER
BACKING
PAD
SANDING
DISC
LOCK NUT
SPINDLE
SPIN-ON
WIRE
BRUSH
!
WARNING
BACKING
FLANGE
LOCK NUT
WHEEL
GUARD
DISC
GRINDING
WHEEL
SPIN-ON GRINDING
WHEEL
LOCATING
TAB
SPINDLE
MOUNTING
FLANGE
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SIDE HANDLE
The side handle used to guide and balance
the tool can be threaded into the front
housing on either side, and on top of the tool,
depending on personal preference and
comfort. Use the side handle for safe control
and ease of operation.
CUP GRINDING WHEELS
Use cup grinding wheels for heavy-duty
stock removal of metals, concrete and
stone.
ADJUSTABLE CUP
WHEEL GUARD INSTALLATION
Open the guard clamp and fit it on the
mounting flange then secure by tightening
the clamp screw. ALWAYS HAVE THIS
GUARD ATTACHED WHEN USING CUP
GRINDING WHEELS
The adjustable guard allows you to lower or
raise the guard’s shell. TO ADJUST: Loosen
the four bolts on the shell, and secure the
shell for 1/4” wheel exposure for maximum
safety.
ATTACHING CUP GRINDING WHEEL
Thread the cup grinding wheel on the
spindle shaft CLOCKWISE. Press in the
spindle lock button and turn the cup grinding
wheel until the lock button engages, then
tighten the wheel securely by hand.
TO REMOVE: Reverse procedure.
-8-
Operating Instructions
"TRI-CONTROL" PADDLE SWITCH
The “Tri-Control” Paddle Switch enables the
operator to control the switch functions of
"Lock-OFF", "ON/OFF" and "Lock-ON".
TO UNLOCK SWITCH
AND TURN TOOL
"ON": Push paddle
lever FORWARD
(toward the spindle)
then squeeze the
paddle lever.
TO SWITCH TOOL "OFF": Release pressure
on paddle lever. The switch is spring loaded
and will return to "OFF" position
automatically.
The "Lock-ON" feature, incorporated into
the paddle switch, is a convenience for long
operations.
TO LOCK SWITCH "ON": After paddle
switch has been activated push paddle lever
completely FORWARD and release paddle
lever.
TO SWITCH TOOL "OFF": Squeeze and then
release paddle lever. The switch is spring
loaded and will return to "OFF" position
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.
!
WARNING
0
1
BOLT
ADJUSTABLE
GUARD
CUP
GRINDING
WHEEL
SHELL
SPINDLE
MOUNTING
FLANGE
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MOTOR HOUSING RELEASE LEVER
(1754 ONLY)
Your tool is equipped with a motor housing
release lever that will allow you to rotate the
spindle in either direction 90˚. To use this
feature, pull release lever in direction of
arrow to release housing, and rotate housing
until it clicks into place.
Sanding Operations
SELECTING SANDING DISC
Sanding discs are made of extremely hard
and sharp aluminum oxide grits, phenolresin bonded to a sturdy fiber backing for
fast heavy-duty service and long life. The
discs vary as to size and spacing of the
abrasive grits. OPEN COAT (type H) — used
for soft materials and on paint or varnish.
CLOSED COAT (type K) —used for metal,
hardwood, stone, marble and other
materials.
Sanding discs range in grit from 16 (very
coarse) to 180 (very fine). To obtain best
results, select sanding discs carefully. Many
jobs require the use of several grit sizes and
at times both “open coat and closed coat”
discs are required to get the job done faster.
See chart for application examples.
Operation: Refinishing painted wood or metal surfaces.
REMARKS GRIT
To remove paint and to smooth Coarse
surface irregularities. 16-24-30
To smooth Medium
the rough sanding. 36-50-80
To remove scratches left by Fine
previous discs. 100-120
To smooth surfaces for painting, Very Fine
polishing or waxing. 150-180
SANDING TIPS
For best results, tilt the Disc Sander at a 10°
to 15° angle while sanding so that only about
1" of the surface around the edge of the disc
contacts the work.
If the disc (accessory) is held flat or the back
edge of the disc comes in contact with the
work, a violent thrust to the side may result.
If sander is tilted too much, sanding action
will be too great and a rough cut surface or
gouging and snagging will result.
Guide the Disc Sander with crosswise
strokes. Be careful not to hold the sander in
one spot too long. Do not use a circular
motion, as this makes swirl marks. Test
before use on scrap stock.
Do not force or apply pressure when
sanding. Use only the weight of the tool for
pressure. Excess pressure actually slows the
tool down. If faster stock removal is desired,
change to a coarser grit disc.
Remove gummy paint from metal with an
“open coat” disc. Sand until sparks start to
appear, then stop and change to a “closed
coat” disc to remove any remaining paint.
SANDING WOOD
When sanding wood the direction of the disc
motion at the contact point should parallel
the grain as much as possible. The rapid cut
of discs and the swirl type scratch pattern
they occasionally create generally prohibit
their use for producing the final finish.
Scratches and circular marks are usually the
result of using too coarse a grit. When
changing to a finer grit, move across the
sanding lines that were made by a previous
coarser disc.
SANDING METAL
When sanding automobiles or appliances,
wipe the metal clean with a non-flammable
solvent or commercial cleaner to remove all
wax and grease. By doing this first, the
sanding discs will sand better and last
longer.
For heavy duty work, use a coarse grit disc
first. Follow-up with a medium grit to remove
scratches. To produce smooth finish, use
fine grit disc.
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-10-
Grinding Operations
ELECTING GRINDING WHEELS
Before using a grinding wheel, be certain
that its maximum safe operating speed is
not exceeded by the nameplate speed of the
grinder. Do not exceed the recommended
wheel diameter.
DISC GRINDING WHEELS
Grinding wheels should be carefully selected
in order to use the grinder most efficiently.
Wheels vary in type of abrasive, bond,
hardness, grit size and structure. The correct
type of wheel to use is determined by the
job. Use disc grinding wheels for fast
grinding of structural steel, heavy weld
beads, steel casting, stainless steel and
other ferrous metals.
GRINDING TIPS
Efficient grinding is achieved by controlling
the pressure and keeping the angle between
wheel and workpiece at 10° to 15°. If the
wheel is flat, the tool is difficult to control. If
the angle is too steep, the pressure is
concentrated on a small area causing
burning to the work surface.
Excessive or sudden
pressure on the wheel will
slow grinding action and put dangerous
stresses on the wheel.
When grinding with a new wheel be certain
to grind while pulling tool backwards until
wheel becomes rounded on its edge. New
wheels have sharp corners which tend to
“bite” or cut into workpiece when pushing
forward.
!
WARNING
Wire Brush Operations
Wire brushes are intended to “clean”
structural steel, castings, sheet metal, stone
and concrete. They are used to remove rust,
scale and paint.
Avoid bouncing and snag-
ging the wire brush, especially when working corners, sharp edges
etc. This can cause loss of control and
kickback.
!
WARNING
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