Page 1
7.5A Angle Grinder
241-0779
OPERATOR’S MANUAL
CAUTION: To Reduce The Risk Of Injury, User Must Read And
Understand Operator's Manual. Save These Instructions For Future Reference.
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page 2
TABLE OF CONTENTS
Safety Symbols................................... Page 2
Safety Instructions............................... Page 2
Description.......................................... Page 7
Assembly and Adjustment................... Page 8
Operation............................................. Page 9
Maintenance...................................... Page 10
Warranty............................................ Page 15
The label on your tool may include the
following symbols.
V............................................................. Volts
A............................................................ Amps
Hz........................................................... Hertz
W........................................................... Watts
min..................................................... Minutes
~....................................... Alternating Current
SPECIFICATIONS
Rating 120 V 60Hz
Motor 7.5 A
Rated Speed 11000 RPM
Wheel diameter 4 1/2”
Arbor size 5/8”
Cord length 8’
Weight 5 lb 8 oz
SAFETY SYMBOLS FOR YOUR TOOL
RULES FOR SAFE OPERATION
KNOW THE TOOL
To reduce the risk of injury, user must read
instruction manual.
IMPORTANT
This tool should only be serviced by a
qualied service technician. For more
information, call the toll-free helpline:
1-866-917-4374.
GENERAL SAFETY RULES FOR
ALL POWER TOOLS
WARNING: To reduce the
risk of injury, the user must read the
Operator’s Manual.
WARNING: Read all safety
warnings and instructions. Failure to
follow the warnings and instructions
may result in electric shock, re and/or
serious injury.
Save all warnings and instructions for
future reference.
The term “power tool” in the warnings refers
to your AC-powered (corded) power tool or
battery-powered (cordless) power tool.
.......................................... Direct Current
no ........................................... No-load Speed
................................... Class II construction
.../min........ Revolutions or Strokes per minute
....... Indicates danger, warning caution. It
means attention! Your safety is
involved..
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 an
explosive environment, such as in the
presence of ammable liquids, gases
or dust. Power tools create sparks that
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) The plug on the power tool must
match the outlet. Never modify the
plug in any way. Do not use adaptor
plugs with earthed (grounded) power
tools. Unmodied plugs and matching
outlets will reduce the 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.
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page 3
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 the
cord away from heat, oil, sharp edges
or moving parts. Damaged or entangled
cords increase the risk of electric shock.
e) When operating a power tool
outdoors, use an extension cord that
is suitable for outdoor use. The use
of a cord that is suitable for outdoor use
reduces the risk of electric shock.
f) If operating a power tool in a damp
location is unavoidable, use a power
supply that is protected by a groundfault circuit interrupter (GFCI). The
use of a GFCI reduces the risk of electric
shock.
3) Personal safety
a) Stay alert, watch what you are doing,
and use common sense when operating
a power tool. Do not use a tool while
tired or under the inuence of drugs,
alcohol, or medication. A moment of
inattention while operating a power tool may
result in serious personal injury.
b) Use personal protective equipment.
Always wear eye protection. Protective
equipment such as a dust mask,
non-skid safety shoes, a hard hat, or
hearing protection, used for appropriate
conditions, will reduce personal injuries.
c) Prevent unintentional starting. Verify
that the switch is in the off-position
before connecting to the power
source and/or battery pack, and
before picking up or carrying the tool.
Carrying power tools with your nger on
the switch or connecting a power tool
that has the switch on invites accidents.
d) Remove any adjusting keys or
wrenches 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 better 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 get caught in moving parts.
g) If devices are provided for the
connection of dust extraction and
collection facilities, verify that these
are connected and properly used. The
use of these devices can reduce dustrelated hazards.
4) Use and care of power tools
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 more safely when used at the rate at
which it was designed to work.
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 disconnect the battery
pack from the power tool before making
any adjustments, changing accessories,
or storing the power tool. 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
who are 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, broken parts, and any other
condition that may affect the power
tool’s 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, tool
bits. etc. in accordance with these
instructions, taking into account the
working conditions and the work to
be performed. Using the power tool for
operations different from those it is intended
for could result in a hazardous situation.
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page 4
5) Service
a) Have your power tool serviced by a
qualied repair person using only
identical replacement parts. This will
ensure that the safety of the power tool is
maintained.
SPECIFIC SAFETY
INSTRUCTIONS FOR ANGLE
GRINDERS
Safety instructions for all operations:
a) This power tool is intended to
function as a grinder. Read all safety
warnings, instructions, illustrations
and specications provided with
this power tool. Failure to follow all
instructions listed below may result in
electric shock, re and/or serious injury.
b) Operations such as sanding, wire
brushing, polishing or cutting-off are not
recommended to be performed with this
power tool. Operations for which the power
tool was not designed may create a hazard
and cause personal injury.
c) Do not use accessories that
are not specically designed
and recommended by the tool
manufacturer for this tool. Just
because the accessory can be attached
to your power tool is no assurance of
safe operation.
d) The rated speed of the accessory
must be at least equal to the
maximum speed marked on the power
tool. Accessories running faster than
their rated speed can break and y apart.
e) The outside diameter and the thickness
of your accessory must be within the
capacity rating of your power tool.
Incorrectly sized accessories cannot be
adequately guarded or controlled.
f) The arbor size of wheels, anges,
backing pads or any other accessory
must properly t the spindle of the
power tool. Accessories with arbor
holes that do not match the mounting
hardware of the power tool will run out
of balance, vibrate excessively and may
cause loss of control.
g) Do not use a damaged accessory.
Before each use inspect the accessory,
such as abrasive wheels, for chips and
cracks, backing pad for cracks, tear or
excess wear. If the power tool or accessory
is dropped, inspect for damage or install an
undamaged accessory.
h) Installing an accessory, position
yourself and bystanders away from the
plane of the rotating accessory and
run the power tool at maximum noload speed for one minute. Damaged
accessories will normally break apart during
this test time.
i) Wear personal protective equipment.
Depending on application, use face
shield, safety goggles or safety
glasses. As appropriate, wear dust
mask, hearing protectors, gloves
and workshop apron capable of
stopping small abrasive or workpiece
fragments. The eye protection must
be capable of stopping ying debris
generated by various operations. The
dust mask or respirator must be capable
of ltering particles generated by your
operation. Prolonged exposure to high
intensity noise may cause hearing loss.
j) Keep bystanders a safe distance away
from the work area. Anyone entering
the work area must wear personal
protective equipment. Fragments of the
workpiece or of a broken accessory may
y away and cause injury beyond the
immediate area of operation.
k) Hold the power tool by the insulated
gripping surfaces only, when
performing an operation where the
cutting accessory may contact hidden
wiring or its own cord. A cutting
accessory contacting a “live” wire may
make exposed metal parts of the power
tool “live” and shock the operator.
l) Position the cord clear of the spinning
accessory. If you lose control, the cord may
be cut or snagged and your hand or arm may
be pulled into the spinning accessory.
m) Never lay the power tool down
until the accessory has come to a
complete stop. The spinning accessory
may grab the surface and pull the power
tool out of your control.
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n) Do not run the power tool while
carrying it at your side. Accidental
contact with the spinning accessory could
snag your clothing, pulling the accessory
into your body.
o) Regularly clean the power tool’s air
vents. The motor’s fan will draw the
dust inside the housing and excessive
accumulation of powdered metal may
cause electrical hazards.
p) Do not operate the power tool near
ammable materials. Sparks could
ignite these materials.
q) Do not use accessories that require
liquid coolants. Using water or other
liquid coolants may result in electrocution
or shock.
Further safety instructions for all
operations--Kickback and Related
Warnings
Kickback is a sudden reaction to a pinched
or snagged rotating wheel, backing pad, or
any other accessory. Pinching or snagging
causes rapid stalling of the rotating
accessory, which, in turn, causes the
uncontrolled power tool to be forced in the
direction opposite of the accessory’s rotation
at the point of the binding.
For example, if an abrasive wheel is snagged
or pinched by the workpiece, the edge of the
wheel that is entering into the pinch point can
dig into the surface of the material, causing
the wheel to climb out or kick out. The wheel
may either jump toward or away from the
operator, depending on direction of the wheel’s
movement at the point of pinching. Abrasive
wheels may also break under these conditions.
Kickback is the result of power tool misuse
and/or incorrect operating procedures or
conditions and can be avoided by taking
proper precautions as given below.
a) Maintain a rm grip on the power tool
and position your body and arm to allow
you to resist kickback forces. Always
use the auxiliary handle for maximum
control over kickback or torque reaction
during start-up. The operator can control
torque reactions or kickback forces, if
proper precautions are taken.
b) Never place your hand near the
rotating accessory. The accessory may
kickback over your hand.
c) Do not position your body in the area
where power tool will move if kickback
occurs. Kickback will propel the tool in
direction opposite to the wheel’s movement
at the point of snagging.
d) Use special care when working
corners, sharp edges, etc. Avoid
bouncing and snagging the
accessory. Corners, sharp edges or
bouncing have a tendency to snag the
rotating accessory and cause loss of
control or kickback.
e) Do not attach a saw chain
woodcarving blade or toothed saw
blade. Such blades create frequent
kickback and loss of control.
Safety instructions for grinding
operations
a) Use only wheel types that are
recommended for your power tool and
the specic guard designed for the
selected wheel. Wheels for which the
power tool was not designed cannot be
adequately guarded and are unsafe.
b) The guard must be securely attached
to the power tool and positioned for
maximum safety, so the least amount
of wheel is exposed towards the
operator. The guard helps to protect
operator from broken wheel fragments
and accidental contact with wheel.
c) Wheels must be used only for
recommended applications. For
example: do not grind with the side of
cut-off wheel. Abrasive cut-off wheels
are intended for peripheral grinding;
side forces applied to these wheels may
cause them to shatter.
d) Always use undamaged wheel anges
that are of correct size and shape for
your selected wheel. Proper wheel
anges support the wheel, thus reducing
the possibility of wheel breakage.
Flanges for cut-off wheels may be
different from grinding wheel anges.
e) Do not use worn down wheels from larger
power tools. A wheel intended for a larger
power tool is not suitable for the higher speed
of a smaller tool and may burst.
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ADDITIONAL INSTRUCTIONS
FOR SAFE OPERATION
a) WARNING-To reduce the risk of injury
always wear eye protection. Everyday
eyeglasses have only impact-resistant
lenses; they are not safety glasses. All
users and bystanders must wear eye
protection that conforms to ANSI Z87.1
WARNING: To reduce the risk
of injury, use only accessories rated
at least equal to the maximum speed
marked on the tool. Wheels and other
accessories running over the rated speed
can y 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.
WARNING: Always use the
proper guard when grinding. A guard
protects operator from broken wheel
fragments. When using grinding wheel
attachments, 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 from
which the tool is being operated.
b) 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. The following table
shows the correct size to use, depending
on cord length and nameplate amperage
rating of the tool. When in doubt, use the
next heavier gauge. Always use UL and
CSA listed extension cords.
Recommended sizes of extension cords
Tool’s
Ampere
rating
Volts
Total length of cord in
feet Cord size in A. W.
G.(minimum)
25’ 50’ 100’ 150’
0-6
120 V~
18 16 16 14
6-10 18 16 14 12
10-12 16 16 14 12
12-16 14 12
Not
Recomm-
ended
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KNOW THE ANGLE GRINDER
(Fig. 1)
The machine is intended for grinding metal
and stone materials without using water.
Before attempting to use this angle grinder,
become familiar with all its operating features
and safety requirements.
DESCRIPTION
WARNING: Do not allow
familiarity with the angle grinder to cause
carelessness. Remember that a careless
fraction of a second is sufcient enough
to inict severe injury.
WARNING: Remove the angle
grinder from the carton and examine
it carefully. Do not leave carton or any
packaging material until all parts are
examined.
FIG. 1
1
2
3
4
5
6
7
8
10
9
11
1. Spindle-lock button 7. Outer ange
2. Spindle direction 8. Wrench
3. Spindle 9. ON/OFF switch
4. Non-cutting guard 10. Side handle
5. Inner ange
11. Insulated gripping
surface
6. Grinding wheel
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POWER SUPPLY
The power tool supply must match the
nameplate rating.
INSTALLING SIDE HANDLE (Fig. 2)
1. Unplug the angle grinder.
2. The side handle may be installed on the
right side or the left side of the tool.Thread
the side handle into the desired operating
position.
3. Securely tighten the side handle by turning
it clockwise.
ATTACHING AND ADJUSTING
THE GUARD (Fig. 3)
Attaching the guard
1. Unplug the angle grinder.
2. Make sure that the prominence on the
guard coincides with the groove in the
gear case cover.
3. Rotate the guard counter-clockwise to the
desired position
4. Pivot the guard-lock lever to secure the
guard in place.
Adjusting the guard
1. Unplug the angle grinder.
2. Pivot the guard-lock lever to loosen the
guard from the gear case cover.
3. Rotate the guard counter clockwise to the
correct position.
4. Pivot the guard-lock lever to tighten the
guard securely.
WARNING: Never use your
grinder with the guard removed. It has
been designed for use only with the guard
attached. Attempting to use the grinder
with the guard removed will result in
loose particles being thrown against the
operator and possibly serious personal
injury.
MOUNTING THE WHEEL (Fig. 4)
WARNING: Only use grinding
wheels with maximum safe operating
speed rated at or above 80m/s. Never use
damaged or imbalance grinding wheels.
Grinding wheel type 27 is recommended to
use on this grinder.
ASSEMBLY AND ADJUSTMENT
FIG. 2
FIG. 4
FIG. 3
Gear Case
Cover
Non-cutting
Guard
Guard-lock
lever
Screw
prominence
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1. Unplug the angle grinder.
2. Make sure that the guard (4) is securely
in place.
3. Place the inner ange (5) on the
spindle (3); make sure that the ange
is positioned so that the shape of the
opening in the ange corresponds with
the shape at the base of the spindle.
4. Place the grinding wheel (6) on the
spindle. Check the rated speed on the
grinding wheel. DO NOT use a wheel
with a rated speed lower than the speed
shown on the grinder nameplate.
NOTE: The maximum wheel thickness is
6.5mm, and the center hole dimension must
be 22.3mm.
OPERATION
SWITCH ON AND OFF
WARNING: Make sure you
can operate the switch easily and turn it
off before plugging grinder into a power
source.
1. To turn the tool “ON,” slide the ON/OFF
switch forward.
2. To turn the tool “OFF,” release the ON/
OFF switch; it will return to the “OFF”
position automatically.
3. For continuous operation, slide the ON/
OFF switch forward to turn on the tool
and press the front of the ON/OFF switch
down until the switch locks in position.
4. To unlock the switch and turn the tool
OFF, press the rear of the ON/OFF
switch; it will return to the “OFF” position
automatically.
ROTATE THE GEAR BOX (Fig. 5)
5. Thread the outer ange on the spindle
with the at side of the ange facing
up, making sure that the opening in the
wheel is positioned around the raised
portion of the outer ange.
6. Press the spindle lock button (1) to
prevent movement of the spindle.
7. Keep the spindle lock button pressed in;
tighten the threaded outer ange (7) by
turning it clockwise with the wrench (8).
8. Remove the wrench and loosen the
spindle lock button.
For applications in which a tool will be
dedicated for uses in edge grinding and
nishing work, the gear case may be rotated
90° left or right of its original position.
1. Unplug the grinder.
2. Remove the four corner screws
connecting gear box and motor housing.
3. Without separating the gear case and
motor housing, turn the gear box 90° to
the left or right.
NOTE:
If the distance between gear box
and motor housing is more than 1/8”, have it
repaired by qualied service center.
4. Re-install the four corner screws.
FIG. 5
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WARNING: To reduce the risk
of injury, electric shock and damage to
the tool, before starting any work, check
to determine if utility lines electricity, gas
or water supply lines are hidden in the
work area.
WARNING: Firmly grasp the
body of the tool and the side handle
before starting.
GRINDING APPLICATION (Fig. 6)
Secure small workpieces in a vise or
clamp them to a workbench.
The key to efcient operation is controlling
the pressure and surface contact between
the grinding wheel and workpiece.
Start the angle grinder and let the motor
and grinding wheel build up to full speed.
Gradually lower the angle grinder until the
grinding wheel contacts the workpiece.
When grinding, keep a 10-15°angle
between the wheel and the workpiece;
Move the machine back and forth with
moderate pressure to avoid discoloring
the workpiece, overheating the workpiece
and creating ridges.
Remove the tool from the workpiece
before turning the tool off. Allow the tool
to stop completely before setting it down.
Never use a cut-off wheel to grind a work
piece.
Always hold the tool properly so that
sparks and grinding dust y away from
the body.
WARNING: Sparks are
generated when grinding metal. Take care
that no combustible material presented in
the area of ying sparks.
FIG. 6
APPLICATION
MAINTENANCE
WARNING: When servicing,
use only identical replacement parts. Use
of any other parts may create a hazard
or cause product damage. For more information, call the toll-free helpline, at
1-866-917-4374.
WARNING: To ensure safety
and reliability, all repairs should be
performed by a qualied service
technician. For more information, call the
toll-free help-line, at 1-866-917-4374.
WARNING: Before cleaning
or performing any maintenance, the tool
should be unplugged from the power
supply.
WARNING: If the supply cord
is damaged, it must be replaced by a specially prepared cord available through the
service organization.
GENERAL MAINTENANCE
Using compressed air may be the most
effective cleaning method. Always wear
safety goggles when cleaning tools with
compressed air. Periodic maintenance
allows for long life and trouble-free operation.
A cleaning, lubrication and maintenance
schedule should be maintained.
1. Avoid dropping or otherwise causing
impact to the tool and keep it from oil and
grease.
2. Inspect the screws periodically. If the
screws loosen, tighten them immediately,
to avoid serious accident.
3. Clean all parts of the tool; clean dust and
debris from vents. Keep the tool clean, dry
and free of oil or grease.
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4. Avoid using solvents when cleaning plastic
parts. Most plastics are susceptible to
damage from various types of commercial
solvents and may be damaged by their
use. Use clean cloths and mild soap to
remove dirt, dust, etc.
LUBRICATION
All of the bearings in this product are
lubricated with a sufcient amount of high
grade lubricant for the life of the unit under
normal operating conditions. Therefore, no
further lubrication is required.
CHANGING CARBON BRUSHES
When brushes become worn, the tool will
automatically stop, preventing damage to
the motor. Brush replacement should be
performed by authorized service centers or
other qualied service technician.
STORAGE AND HANDLING OF
GRINDING WHEELS
When not in use, grinding wheels should be
stored carefully in a rack or box, to protect
them from chipping or breakage.
All grinding wheels must be handled carefully
to prevent dropping and bumping.
STANDARD ACCESSORIES
• Side handle.................... 1pc
• Wrench........................... 1pc
• Grinding wheel............. 1pc
TROUBLE SHOOTING
Problems Reasons Solutions
1. The motor
stops running
1.
Unconnected
to power
source
1. Connect to
power source
2. Plugs
not fully
connected
2. Check all
plugs
3. Brushs
require
replacement
3. Replace
the brushs
with two new
ones
2. Running
slowly
1. Grinding
wheel worn
out
1. Replace
grinding
wheel
Page 12
page 12
NOTES
Page 13
page 13
NOTES
Page 14
page 14
NOTES
Page 15
page 15
SAVE YOUR RECEIPTS
THIS WARRANTY IS VOID WITHOUT THEM
7.5A Angle Grinder
WARRANTY
90-DAY MONEY BACK GUARANTEE:
This MASTERFORCE® brand power tool carries our 90-DAY Money Back Guarantee.
If you are not completely satised with your MASTERFORCE® brand power tool for
any reason within ninety (90) days from the date of purchase, return the tool with your
original receipt to any MENARDS® retail store, and we will provide you a refund – no
questions asked.
3-YEAR LIMITED WARRANTY:
This MASTERFORCE® brand power tool carries our famous No Hassle 3-Year Limited
Warranty to the original purchaser. If, during normal use, this MASTERFORCE® power
tool breaks or fails due to a defect in material or workmanship within three (3) years from
the date of original purchase, simply bring this tool with the original sales receipt back
to your nearest MENARDS® retail store. At its discretion, MASTERFORCE® agrees
to have the tool or any defective part(s) repaired or replaced with the same or similar
MASTERFORCE® product or part free of charge, within the stated warranty period,
when returned by the original purchaser with original sales receipt. Not withstanding
the foregoing, this limited warranty does not cover any damage that has resulted from
abuse or misuse of the Merchandise. This warranty: (1) excludes expendable parts
including but not limited to blades, brushes, belts, bits, light bulbs, and/or batteries; (2)
shall be void if this tool is used for commercial and/or rental purposes; and (3) does not
cover any losses, injuries to persons/property or costs. This warranty does give you
specic legal rights and you may have other rights, which vary from state to state. Be
careful, tools are dangerous if improperly used or maintained. Seller’s employees are
not qualied to advise you on the use of this Merchandise. Any oral representation(s)
made will not be binding on seller or its employees. The rights under this limited
warranty are to the original purchaser of the Merchandise and may not be transferred
to any subsequent owner. This limited warranty is in lieu of all warranties, expressed
or implied including warranties or merchantability and tness for a particular purpose.
Seller shall not be liable for any special, incidental, or consequential damages. The
sole exclusive remedy against the seller will be for the replacement of any defects
as provided herein, as long as the seller is willing or able to replace this product or is
willing to refund the purchase price as provided above. For insurance purposes, seller
is not allowed to demonstrate any of these power tools for you.
For questions / comments, technical assistance or repair parts –
Please Call Toll Free at: 1-866-917-4374. (M-F 8am – 6pm)
Page 16
© 2011 Menard, Inc., Eau Claire, WI 54703 05/2011
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