Black & Decker 7750 User Manual

GENERAL SAFETY RULES

WARNING: 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

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 bystanders, 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.

• 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.

• 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.

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 clothing, jewelry, or long hair
can be caught in moving parts. Air vents may cover moving parts and should be avoided.

• 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. Awrench or 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.

• 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 preventative 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.

• 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.

• 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.

• 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.

SPECIFIC SAFETY RULES

• Always use proper guard with grinding wheel. A guard protects operator from broken
wheel fragments. Always position the guard so that as much of the exposed disc as possible
is pointing away from you.

• 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.

• 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.

ADDITIONAL SAFETY RULES

• ALWAYS WEAR EYE PROTECTION.

• Wear ear protection. noise level may be amplified when grinding in enclosed spaces.

• KEEP GUARDS IN PLACE WHEN GRINDING.

• Use only accessories having a maximum operating speed at least as high as the speed
specified in the warning on the tool’s label. NEVER use T ype11 (Flaring Cup) wheels on this
tool.

• Before using, inspect recommended accessory for cracks or flaws. If such a crack or flaw is
evident, discard the accessory. The accessory should also be inspected whenever you think
the tool may have been dropped.

• When starting the tool (with a new or replacement wheel or brush installed) hold the tool in a
well protected area and let it run for one minute. If the wheel or brush has an undetected
crack or flaw, it should burst or separate in less than one minute. Never start the tool with a
person in line with the accessory. This includes the operator.

• In operation, avoid bouncing the wheel or giving it rough treatment. If this occurs, stop the
tool and inspect the wheel.

• ALWAYS USE GUARDS with grinding wheels and wire cup brushes. Sanding discs and flat
wire brushes may be used without guards. Always position the guard so that as much of the
exposed wheel or wire brush as possible is pointing away from you.

• Always wear eye, face and body protection when brushing. Brush filiments may break
and be thrown at operator.

• Clean your tool out periodically.

• Do not use Type 1 cutting or diamond wheels. Proper guards are not available. Use
conventional Type 27 depressed center (non-hubbed) wheels only.

CAUTION: Use extra care when grinding into a corner as a sudden, sharp, movement of

the grinder may be experienced when the wheel contacts a secondary surface.

WARNING: 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. (CCA)
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.

• Avoid prolonged contact with dust from power sanding, sawing, grinding, drilling,

and other construction activities. Wear protective clothing and wash exposed areas
with soap and water. Allowing dust to get into your mouth, eyes, or lay on the skin may

promote absorption of harmful chemicals.

CAUTION: Wear appropriate hearing protection during use. Under some conditions

and duration of use, noise from this product may contribute to hearing loss.

The label on your tool may include the following symbols.

V ..........................volts A..........................amperes

Hz ........................hertz W ........................watts

min........................minutes ......................alternating current

......................direct current

n

o........................no load speed

..........................

Class II Construction

........................earthing terminal

........................safety alert symbol .../min ..................revolutions or

reciprocations
per minute

CAT. NO. 7750 FORM NO. 581596-00 PRINTED IN CHINA (MAR - 02 )

KEY INFORMATION YOU SHOULD

KNOW:

• Wait until tool reaches full speed before
applying to work. Remove from work and
allow to stop before setting down.

• Hold grinder at proper angle, as shown in
figures 1 1 and 12.

VEA EL ESPAÑOL EN LA CONTRAPORTADA.

SAVE THIS MANUAL FOR FUTURE REFERENCE.

INSTRUCTIVO DE OPERACIÓN, CENTROS DE SERVICIO Y
PÓLIZADE GARANTÍA. ADVERTENCIA: LÉASE ESTE
INSTRUCTIVO ANTES DE USAR ELPRODUCTO.

INSTRUCTION MANUAL

Catalog Number 7750

4444----1111////2222 iiiinnnncccchhhh AAAAnnnngggglllleeee GGGGrrrriiiinnnnddddeeeerr

rr

1.) ON/OFF SWITCH / INTERRUPTEUR COULISSANT
/ INTERRUPTOR DESLIZABLE

2.) LOCK-ON BUTTON / BOUTON DE
VERROUILLAGE / BOTON DE ENCENDIDO
PERMANENTE

3.) SPINDLE LOCK BUTTON / BOUTON DE
VERROUILLAGE D'ARBRE / BOTON DE SEGURO DE
LA FLECHA

4.) ACCESSORY WHEEL / MEULE ACCESSOIRE /
DISCO ACCESORIO

5.) AUXILIARY HANDLE / POIGNÉE AUXILIAIRE /
MANGO AUXILIAR

6.) WHEEL GUARD / CARTER DE MEULE / GUARDA
DEL DISCO

1

4

5

6

1

3

4

5

6

2

2

6

11

4

9

6

8

10

3

9

12

4

12

14

6

4

8

7

BEFORE RETURNING THIS PRODUCT

FOR ANY REASON PLEASE CALL

1-800-54-HOW-TO

IF YOU SHOULD EXPERIENCE A PROBLEM

WITH YOUR BLACK & DECKER PURCHASE,

CALL 1-800-54-HOW-TO (1-800-544-6986).

IN MOST CASES, A BLACK & DECKER REPRESENTATIVE

CAN RESOLVE YOUR PROBLEM OVER THE PHONE.

IF YOU HAVE A SUGGESTION OR COMMENT,

GIVE US A CALL. YOUR FEEDBACK IS VITAL

TO THE SUCCESS OF BLACK & DECKER’S QUALITY

IMPROVEMENT PROGRAM.

(544-6986)

3 screws (6). Remove the flange (7), guard (4) and spring washer (8). Store these parts
carefully.

PRECAUTIONS TO TAKE WHEN SANDING PAINT

1. Sanding of lead based paint is NOT RECOMMENDED due to the difficulty of controlling
the contaminated dust. The greatest danger of lead poisoning is to children and pregnant
women.

2. Since it is difficult to identify whether or not a paint contains lead without a chemical analy­sis, we recommend the following precautions when sanding any paint:

PERSONAL SAFETY

1. No children or pregnant women should enter the work area where the paint sanding is
being done until all cleanup is completed.

2. Adustmask or respirator should be worn by all persons entering the work area. The filter
should be replaced daily or whenever the wearer has difficulty breathing.

NOTE: ONLY THOSE DUSTMASKS SUITABLE FOR WORKING WITH LEAD PAINT
DUST AND FUMES SHOULD BE USED. ORDINARY PAINTING MASKS DO NOT OFFER
THIS PROTECTION. SEE YOUR LOCAL HARDWARE DEALER FOR THE NIOSH
APPROVED PROPER MASK.

ENVIRONMENTAL SAFETY

1. Paint should be removed in such a manner as to minimize the amount of dust generated.

2. Areas where paint removal is occurring should be sealed with plastic sheeting of 4 mils
thickness.

3. Sanding should be done in a manner to reduce tracking of paint dust outside the work
area.

FITTING ABRASIVE DISCS

TURN OFF AND UNPLUG THE TOOL.

Use an abrasive disc with a backing pad for sanding with your angle grinder.

1. Remove the guard.

2. Place the flange, (backing pad and abrasive disc sold separately) and outer flange on the
spindle as shown in Figure 8. Figure 8A shows how to attach an abrasive disc with a rub­ber backing pad.

3. Tighten the abrasive disc as shown in Figure 9 by depressing the spindle lock button and
turning the abrasive disc by hand.

GENERAL INFORMATION

HELPFUL HINTS

• Hold your angle grinder with one hand on the body and the other hand firmly around the side

handle as shown in Figure 10.

• 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. Direct away from

people and flammable materials.

• Maintain an angle between the disc and work surface (Fig. 11) of approximately 30° when

grinding and 10°-15° when sanding ( Fig. 12) for best tool control, material removal, and
minimal loading.

WARNING: Always wear eye protection while operating this power tool including

face and body protection when brushing.

TOOL MAINTENANCE

CLEANING: Blowing dust and grit out of the motor housing using compressed air is a

necessary maintenance procedure. Dust and grit containing particles from metal grinding
often accumulate on interior surfaces and could create an electrical shock hazard if not
cleaned out. Never use solvents or harsh chemicals, use only mild soap and damp cloth to
clean the tool. Never let any liquid get inside the tool; never immerse any part of the tool into
a liquid.

LUBRICATION

Black & Decker tools are properly lubricated at the factory and are ready for use. T ools should
be lubricated regularly every year depending on usage. (Tools used on heavy duty jobs and
tools exposed to heat may require more frequent lubrication.) This lubrication should be
attempted only by trained power tool repairperson's such as those at Black & Decker service
centers or in other qualified service personnel.

IMPORTANT

To assure product SAFETY and RELIABILITY , repairs, maintenance and adjustments should
be performed by Black & Decker service centers or other qualified service personnel, always
using Black & Decker replacement parts.

ACCESSORIES

Recommended accessories for use with your tool are available from your local dealer or
authorized service center. If you need assistance regarding accessories, please call:

1-800-54-HOW TO (1-800-544-6986).

WARNING: The use of any accessory not recommended for use with this tool could be

hazardous.

SERVICE INFORMATION

Black & Decker offers a full network of company-owned and authorized service locations
throughout North America. All Black & Decker Service Centers are staffed with trained
personnel to provide customers with efficient and reliable power tool service. Whether you
need technical advice, repair, or genuine factory replacement parts, contact the Black &
Decker location nearest you. To find your local service location, refer to the yellow page
directory under "Tools—Electric" or call: 1-800-54-HOW-TO (1-800-544-6986).

FULL TWO-YEAR HOME USE WARRANTY

Black & Decker (U.S.) Inc. warrants this product for two years against any defects in
material or workmanship. The defective product will be replaced or repaired at no charge in
either of two ways.

The first, which will result in exchanges only, is to return the product to the retailer from
whom it was purchased (provided that the store is a participating retailer). Returns should
be made within the time period of the retailer’s policy for exchanges (usually 30 to 90 days
after the sale). Proof of purchase may be required. Please check with the retailer for their
specific return policy regarding returns that are beyond the time set for exchanges.

The second option is to take or send the product (prepaid) to a Black & Decker owned or
authorized Service Center for repair or replacement at our option. Proof of purchase may be
required. Black & Decker owned and authorized Service Centers are listed under
"Tools–Electric" in the yellow pages of the phone director.

This warranty does not apply to accessories. This warranty gives you specific legal rights
and you may have other rights which vary from state to state. Should you have any
questions, contact the manager of your nearest Black & Decker Service Center. This
product is not intended for commercial use.

FREE WARNING LABEL REPLACEMENT: If your warning labels become illegible or are
missing, call 1-800-544-6986 for a free replacement.

See ‘Tools-Electric’

– Yellow Pages –

for Service & Sales

Black & Decker (U.S.) Inc.,

701 E. Joppa Rd.

Towson, MD 21286 U.S.A.

EXTENSION CORDS

When using an extension cord, be sure to use one heavy enough to carry the current your
product will draw and is in good condition . An undersized cord will cause a drop in line
voltage resulting in loss of power and overheating. The following table shows the correct size
to use depending on cord length and nameplate ampere rating. If in doubt, use the next
heavier gage. The smaller the gage number, the heavier the cord.

MOTOR

Your Black & Decker tool is powered by a Black & Decker-built motor. Be sure your power
supply agrees with nameplate marking. 120 Volts AC only means your tool will operate on
standard 60 Hz household power. Do not operate AC tools on DC. A rating of 120 volts
AC/DC means that you tool will operate on standard 60 Hz AC or DC power. This information
is printed on the nameplate. Lower voltage will cause loss of power and can result in over­heating. All Black & Decker tools are factory-tested; if this tool does not operate, check the
power supply.

AUXILIARY HANDLE (FIG. 1)

An auxiliary handle (5) is furnished with your grinder and can be screwed into either side of
the grinder housing. This handle SHOULD BE USED AT ALL TIMES to maintain complete
control of the tool. TIGHTEN SECURELY.

STAR TING AND STOPPING THE TOOL

To start the tool, slide the ON/OFF switch forward (1). For continuous operation, slide the
switch (2) fully forward and press front end down. To stop the tool, release the ON/OFF
switch. To stop the tool while running in continuous mode, press the rearward part of the
switch.

NOTE: Do not switch the tool on or off while under load conditions. Allow the grinder to run
up to full speed before touching the surface to be ground. Lift the tool from the surface before
turning the tool off. CAUTION: Allow the tool to stop before setting down.

OVERLOAD

Overloading will cause damage to the motor of your angle grinder. This can happen if your
angle grinder is subjected to heavy use for prolonged periods of time. Do not in any
circumstances, attempt to exert too much pressure on your angle grinder to speed up your
work. The abrasive accessories operate more efficiently when light pressure is exerted, thus
avoiding a drop in the speed of your angle grinder.

GRINDING AND WIRE BRUSHING

AT TACHING THE WHEEL GUARD (FIG. 2)

Turn off and unplug the tool. NEVER GRIND OR BRUSH WITHOUT GUARD IN PLACE.

• Place the angle grinder on a table, spindle (9) facing up.

• Placing the spring washer (8) over the spindle and locate it on the shoulder (10).

• Place the guard onto the tool as shown.

• Place the flange (11) over the spindle with the protrusions facing towards the guard. Make

sure that the screws are tight and that the guard can be rotated.

FITTING DEPRESSED CENTER WHEELS (FIGS. 3,4,5,6)

Turn off and unplug the tool. CAUTION: Never use any grinding wheels without the proper
guard.

1.)Ensure that the guard is fitted properly. Place the inner flange (12) on the spindle (9) as
shown (Fig. 3). Ensure that it is located on the two flats.

2.)Place the grinding wheel (4) on the spindle (9) and inner flange (12) as shown Fig. 4.

3.)Fit the threaded outer flange (14) making sure it is facing in the correct direction for the type
of wheel fitted. For thick grinding wheels Fig. 5, the flange (14) is fitted with the raised portion
facing towards the wheel. For thin grinding wheels, the flange (14) is fitted with the inner
portion facing away from the wheel.

4.)Press in the spindle lock button and rotate the spindle until it locks. Keeping the lock button
pressed in, tighten the outer flange with the spanner wrench provided as shown in Fig. 6.
Hubbed wheels do not require mounting flanges and may be tightened with standard
wrenches.

5.)When using a depressed-center wheel, hold the tool so that an angle of approximately 30°
exists between the wheel and the work.

WARNING: Check rated speed on depressed-center wheel. Never use a wheel with rated

speed lower than the speed on the nameplate of the tool.
Note: Sanding flap discs are considered to be grinding wheels and must be used with guards.

FITTING WIRE BRUSHES

Wire cup brushes screw directly on the spindle of the machine without the use of flanges.
When using wire brushes, thread firmly on spindle by hand. The guard may be removed for
brushing with flat wire brushes.

EDGE GRINDING

Edge grinding may be done with Type 27 depressed center wheels specifically designed for
this purpose. These wheels are available locally. They must not be subject to side pressure.

CAUTION: Wheels used for edge grinding may break if they bend or twist while being used
for cut-off work or deep grinding. To reduce the risk of serious injury, limit the use of these
wheels to shallow cutting and notching (less than 1/2” in depth). The open side of the guard
must be positioned away from the operator.

SANDING

REMOVING THE WHEEL GUARD (FIG. 7 FOR SANDING AND USING FLAT WIRE

BRUSHES.)

TURN OFF AND UNPLUG THE TOOL.
NOTE: To prevent loss of control, do not set tool down until accessory has completely

stopped turning.
As shown in Fig. 7, place the grinder on a table, spindle up. Use a screwdriver to remove the

Minimum Gage for Cord Sets

Volts Total Length of Cord in Feet

120V 0-25 26-50 51-100 101-150
240V 0-50 51-100 101-200 201-300

Ampere Rating

More Not more American Wire Gage
Than Than

0-6 18 16 16 14
6 - 10 18 16 14 12
10 - 12 16 16 14 12
12 - 16 14 12 Not Recommended

10

11

12

8

9

8A

RENSEIGNEMENTS IMPORT ANTS

• Attendre que la meule atteigne sa vitesse maximale avant de la poser sur
l'ouvrage.

• Tenir la meuleuse à l'angle approprié, tel qu'illustré à la fig.11, fig. 12.

AV ANTDE RETOURNER LE PRODUIT, PEUIMPORTE

LA RAISON PRIÈRE DE COMPOSER 1 800 544-6986

A VERTISSEMENT : IMPORTANTES MESURES DE SÉCURITÉ

AVERTISSEMENT! Vous devez lire et comprendre toutes les instructions. Le non-

respect, même partiel, des instructions ci-après entraîne un risque de choc électrique,
d’incendie et/ou de blessures graves.

CONSERVEZ CES INSTRUCTIONS.