Black & Decker GR750 Instruction Manual

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 bet-

ter control of the power tool in unexpected situations.

f) 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. Air vents often cover moving parts and should also be avoided.

g) If devices are provided for the connection of dust extraction and collection facil-

ities, 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 designed.

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 repaired.

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) Use the power tool, accessories and tool bits etc., in accordance with these

instructions and in the manner intended for the particular type of power tool,
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.

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.

b) If the replacement of the supply cord is necessary, this has to be done by the

manufacturer or his agent in order to avoid a safety hazard.

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.

• Use only accessories having a maximum operating speed at least as high as the speed

specified in the warning on the tool’s label.

• 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 brushes. Always position the

guard so that as much of the exposed wheel or wire brush as possible is pointing away
from you.

• Clean your tool out periodically.

• Do not use Type 1 flat cut-off abrasive or diamond wheels without proper guard. (Guard

not included with unit.)

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.

WARNING: Use of this tool can generate and/or disperse dust, which may cause

serious and permanent respiratory or other injury. Always use NIOSH/OSHA approved

respiratory protection appropriate for the dust exposure. Direct particles away from face
and body.

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

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

CAUTION: Do not operate this tool for long periods of time. Vibration caused by

the operating action of this tool may cause permanent injury to fingers, hands, and arms.
Use gloves to provide extra cushion, take frequent rest periods, and limit daily time of
use.

WARNING: This product contains chemicals, including lead, known to the State of

California to cause cancer, and birth defects or other reproductive harm. Wash hands
after handling.
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 SPM ....................strokes per

minute

.../min ....................revolutions or

reciprocations per minute

General Safety Rules

WARNING! Read all instructions. Failure to follow all instructions listed below may

result in electric shock, fire and/or serious injury. The term “power tool” in all of the
warnings listed below refers to your mains-operated (corded) power tool or battery­operated (cordless) power tool.

SAVE THESE INSTRUCTIONS

1) WORK AREA SAFETY
a) Keep work area clean and well lit. Cluttered or dark areas invite accidents.
b) 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.

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.

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 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. Replace or repair dam­aged cords. Make sure your extension cord is in good condition. Use only 3-wire exten­sion cords that have 3-prong grounding-type plugs and 3-pole receptacles that accept
the tool’s plug.

e) When operating a power tool outdoors, use an extension cord suitable for out-

door use. Use of a cord suitable for outdoor use reduces the risk of electric shock.

When using an extension cord, be sure to use one heavy enough to carry the current
your product will draw. 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.

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 AWG
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

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 tool may

result in serious personal injury.

b) Use safety equipment. Always wear eye protection. Safety equipment such as dust

mask, non-skid safety shoes, hard hat, or hearing protection used for appropriate condi­tions will reduce personal injuries.

c) Avoid accidental starting. Ensure the switch is in the off-position before plugging

in. Carrying power tools with your finger on the switch or plugging in power tools that

have the switch on invites accidents.

INFORMATION YOU SHOULD KNOW

• Wait until grinding wheel reaches full speed before applying work.

• Hold grinder at proper angle, as shown in Figure 11 and 12.

VEA EL ESPAÑOL EN LA CONTRAPORTADA.

SAVE THIS MANUAL FOR FUTURE REFERENCE.

INSTRUCTIVO DE OPERACIÓN, CENTROS DE SERVICIO Y
PÓLIZA DE GARANTÍA. ADVERTENCIA: LÉASE ESTE
INSTRUCTIVO ANTES DE USAR EL PRODUCTO.

CAT. NO. GR750 FORM NO. 634745-00 Copyright © 2005 Black & Decker (SEPT-05) Printed in China

1. Slider switch
Interrupteur Marche/Arrêt
Conmutador de encendido y apagado

2. Lock-on button
Bouton de verrouillage en position de marche
Botón de bloqueo en encendido

3. 3 Position side handle
Poignée latérale
Mango lateral

4. Spindle lock
Bouton de verrouillage de la broche
Seguro del eje

5. Guard
Dispositif de protection
Protector

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BEFORE RETURNING THIS PRODUCT

FOR ANY REASON PLEASE CALL

1-800-544-6986

IF YOU SHOULD HAVE A QUESTION OR

EXPERIENCE A PROBLEM WITH YOUR

BLACK & DECKER PRODUCT,

CCAALLLL 11--880000--554444--66998866

BEFORE YOU CALL, HAVE THE FOLLOWING INFORMATION AVAILABLE, CATALOG No.,

TYPE No., AND DATE CODE (e.g. 0130M). 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 BLACK & DECKER.

INSTRUCTION MANUAL

Catalog Number GR750

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Motor

Your tool is powered by a Black & Decker specified motor. Be sure your power supply agrees
with the nameplate marking. A marking of 120 volts, 50/60 Hz or 120 volts, AC only means
that the tool is designed to operate on normal 120 volt house current. Voltage decrease of
more that 10% will cause loss of power and overheating. All Black & Decker tools are factory
tested. If this tool does not run, check the power supply.

ASSEMBLY

WARNING: To prevent accidental operation, turn off and unplug tool before

performing the following operations. Failure to do this could result in serious

personal injury.

Fitting the Side Handle

• A three position auxiliary handle is furnished with your grinder and can be screwed into the
top or either side of the grinder housing.

WARNING: This handle SHOULD BE USED AT ALL TIMES to maintain complete control

of the tool. Always make sure the handle is tight.

Fitting and Removing Depressed Center Wheels - Fig. 2 - 5

CAUTION: Never use any depressed-center wheels without the proper guard.

Fitting - Figure 2, 3

• Ensure the guard is securely attached.

• Place the inner flange onto the spindle as shown (fig. 2). Make sure that the flange is
correctly located on the flat sides of the spindle.

• Place the disc onto the spindle as shown (fig. 3). If the disc has a raised center, make sure
that the raised center faces the inner flange.

• Make sure that the disc locates correctly on the inner flange.

• Place the outer flange onto the spindle (fig. 3). When fitting a grinding disc, the raised
center on the outer flange must face towards the disc (A in fig. 4). When fitting a cutting
disc, the raised center on the outer flange must face away from the disc (B in fig. 4).

• Keep the spindle lock (4) depressed and tighten the outer flange using the two-pin spanner
(fig. 5).

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

• When using ready-mount or hubbed wheels, flanges are not required.

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.

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.

Removing - Figure 5

• Keep the spindle lock (4) depressed and loosen the outer flange using the two-pin spanner
(fig. 5).

• Remove the outer flange and the disc.

Fitting Wire Cup Brushes & Stringer Bead/Cable Twist Brushes

Wire brushes screw directly on the spindle of the machine without the use of flanges. When
using wire brushes, thread firmly on spindle by hand.

Fitting Abrasive Discs

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

• Remove the guard.

• Place the flange, (backing pad and abrasive disc sold separately) and outer flange on the
spindle as shown in Figure 6. Figure 6A shows how to attach an abrasive disc with a
rubber backing pad.

• Tighten the abrasive disc as shown in Figure 7 by depressing the spindle lock button and
turning the abrasive disc by hand.

OPERATION

WARNING: Let the tool work at its own pace. Do not overload.

Switching On and Off

• To switch the tool on, push the slider switch forward.

• To switch the tool off, release the slider switch.

• To switch the tool on for continuous operation, push the slider switch forward and push in
on the forward portion of the switch to lock it on. To switch the tool off push the rearward
portion of the switch.

WARNING: Do not switch the tool off while under load.

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 discs operate more efficiently when light pressure is exerted,
thus avoiding a drop in the speed of your angle grinder.

SANDING

Precautions to Take When Sanding Paint

• 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.

• 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

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

• A dustmask 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

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

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

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

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 8.

• 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.

• Maintain an angle between the disc and work surface (Fig. 9) of approximately 30° when
grinding and 10°-15° when sanding ( Fig. 10) for best tool control, material removal, and
minimal loading.

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: Always wear eye protection while operating this power tool.

Maintenance
Cleaning

Blowing dust and grit out of the motor housing using compressed air is a necessary
maintenance procedure.

CAUTION: Dust and grit from metal grinding often accumulate on interior surfaces and

could create an electrical shock hazard if not cleaned out.
Use only mild soap and a damp cloth to clean the tool. Never let any liquid get inside the

tool; never immerse any part of the tool into a liquid.
IMPORTANT: To assure product SAFETY and RELIABILITY, repairs, maintenance and

adjustment should be performed by authorized service centers or other qualified service
personnel, always using identical replacement parts.

Lubrication

Black & Decker tools are properly lubricated at the factory and are ready for use. Tools
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.

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 (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.

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 "Tools­Electric" in the yellow pages of the phone directory.

This warranty does not apply to accessories. This warranty gives you specific legal rights
and you may have other rights which vary from province to province. 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.

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See ‘Tools-Electric’

– Yellow Pages –

for Service & Sales

Imported by

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

701 E. Joppa Rd.

Towson, MD 21286 U.S.A.

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