Kobalt KAG 424B-03 User manual

AB16495
Questions, problems, missing parts? Before returning to your retailer, call our customer
service department at 1-888-3KOBALT (1-888-356-2258), 8 a.m. - 8 p.m., EST,
Monday - Friday.
ATTACH YOUR RECEIPT HERE
Serial Number Purchase Date
ITEM #0790025
BRUSHLESS ANGLE
GRINDER/CUT-OFF TOOL
MODEL #KAG 424B-03
Español p. 19

2
TABLE OF CONTENTS
Product Specications...................................................................................... 2
Package Contents............................................................................................3
Safety Information............................................................................................4
Preparation..................................................................................................... 10
Operating Instructions.................................................................................... 10
Care and Maintenance...................................................................................16
Troubleshooting.............................................................................................. 17
Warranty.........................................................................................................17
PRODUCT SPECIFICATIONS
COMPONENT SPECIFICATION
Rated voltage 24 V d.c.
Rated speed 8500 RPM
Maximum wheel size 125 mm
Spindle thread size 5/8 in.

3
PACKAGE CONTENTS
A
J
C D E F
K L M
B
H
I
G
PART DESCRIPTION PART DESCRIPTION
A Spindle-lock button H Auxiliary handle
BInner ange I Wrench
COuter ange J Cutting guard
D Auxiliary handle sockets (3) K Cut-off wheel
E Paddle switch L Grinding guard
F Lock-off lever M Grinding wheel (5)
G Inlet-vent guards (2)
WARNING
• Remove the tool from the package and examine it carefully. Do not discard the carton or any
packaging material until all parts have been examined.
• If any part of the tool is missing or damaged, do not attach the battery pack or use the tool
until the part has been repaired or replaced. Failure to heed this warning could result in
serious injury.

4
SAFETY INFORMATION
Please read and understand this entire manual before attempting to assemble or operate
this product. If you have any questions regarding the product, please call customer service at
1-888-3KOBALT, 8 a.m. - 8 p.m., EST, Monday - Friday.
WARNING
• The operation of any power tool can result in foreign objects being thrown into your eyes,
which can result in severe eye damage. Before beginning power-tool operation, always wear
safety goggles or safety glasses with side shields and a full-face shield, when needed. It is
recommended to use a wide vision safety mask over eyeglasses or standard safety glasses
with shields. Always use eye protection marked to comply with ANSI Z87.1.
• Some dust created by power sanding, sawing, grinding, drilling, and other construction
activities contains chemicals known to the state of California to cause cancer, birth defects,
or other reproductive harm. Some examples of these chemicals are:
– Lead from lead-based paints
– Crystalline silica from bricks, cement, and other masonry products
– Arsenic and chromium from chemically-treated lumber
• Your risk from these exposures varies, depending upon how often you do this type of work.
To reduce your exposure to these chemicals:
– Work in a well-ventilated area.
– Work with approved safety equipment, such as dust masks that are specially designed to
lter 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 or eyes or to lie on the skin may promote
absorption of harmful chemicals.
• ALWAYS use safety glasses. Everyday eyeglasses are NOT safety glasses. Also use face
or dust mask if cutting operation is dusty.
• Always wear proper personal hearing protection that conforms to ANSI during use.
Under some conditions and duration of use, noise from this product may contribute to
hearing loss.
Know the Tool
To operate this tool, carefully read this manual and all labels afxed to the tool before using it.
Keep this manual available for future reference.
Important
This tool should be serviced only by a qualied service technician.
Read All Instructions Thoroughly

5
SAFETY INFORMATION
Some of the following symbols may be used on this tool. Please study them and their meaning.
Proper interpretation of these symbols will allow you to operate the tool better and more safely.
SYMBOL DEFINITION SYMBOL DEFINITION
V Volts n Rated speed
A Amps /min Revolutions or Strokes per Minute
Hz Hertz Direct Current
W Watts Spindle Thread Size
WARNING – Always
wear eye protection
WARNING – To reduce the risk of
injury, user must read instruction
manual.
General Power Tool Safety Warnings
WARNING
• Read all safety warnings and all 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 mains-operated (corded) power tool or
battery-operated (cordless) power tool.
Work Area Safety
• Keep work area clean and well lit. Cluttered or dark areas invite accidents.
• Do not operate power tools in explosive atmospheres, such as in the presence of
ammable liquids, gases or dust. Power tools create sparks, which may ignite the dust or
fumes.
• Keep children and bystanders away while operating a power tool. Distractions can
cause you to lose control.
Electrical Safety
• Power tool plugs must match the outlet. Never modify the plug in any way. Do not use
any adaptor plugs with earthed (grounded) power tools. Unmodied plugs and matching
outlets will reduce the risk of electric shock.
• Avoid body contact with earthed or grounded surfaces such as pipes, radiators, range
sand refrigerators. There is an increased risk of electric shock if your body is earthed or
grounded.
• Do not expose power tools to rain or wet conditions. Water entering a power tool will
increase the risk of electric shock.

6
SAFETY INFORMATION
• 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.
• When operating a power tool outdoors, use an extension cord suitable for outdoor
use. Use of a cord suitable for outdoor use reduces the risk of electric shock.
• If operating a power tool in a damp location is unavoidable, use a ground-fault circuit
interrupter (GFCI) protected supply. Use of a GFCI reduces 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 a power tool while you are tired or under the inuence of drugs, alcohol or
medication. A moment of inattention while operating power tools may result in serious personal
injury.
• Use personal protective equipment. Always wear eye protection. Protective equipment
such as dust mask, non-skid safety shoes, hard hat, or hearing protection, used for
appropriate conditions, will reduce personal injuries.
• Prevent unintentional starting. Ensure the switch is in the off-position before
connecting to power source and/or battery pack, picking up or carrying the tool.
Carrying power tools with your nger on the switch or energizing power tools that have the
switch on invites accidents.
• 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.
• Do not overreach. Keep proper footing and balance at all times. This enables better
control of the power tool in unexpected situations.
• 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.
• If devices are provided for the connection of dust extraction and collection facilities,
ensure that these are connected and properly used. Use of these devices can reduce
dust-related hazards.
Power Tool Use and Care
• 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.
• 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.
• 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.
• 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.
• Maintain power tools. Check for misalignment or binding of moving parts, breakage of
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.
• Keep cutting tools sharp and clean. Properly maintained cutting tools with sharp cutting
edges are less likely to bind and are easier to control.
• 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. Use of the
power tool for operations different from those intended could result in a hazardous situation.

7
SAFETY INFORMATION
Battery Tool Use and Care
• Recharge only with the charger specied by the manufacturer. A charger that is suitable
for one type of battery pack may create a risk of re when used with another battery pack.
• Use power tools only with specically designated battery packs. Use of any other
battery packs may create a risk of injury and re.
• When battery pack is not in use, keep it away from other metal objects like paperclips,
coins, keys, nails, screws or other small metal objects that can make a connection
from one terminal to another. Shorting the battery terminals together may cause burns or
a re.
• Under abusive conditions, liquid may be ejected from the battery; avoid contact. If
contact accidentally occurs, ush with water. If liquid contacts eyes, additionally seek
medical help. Liquid ejected from the battery may cause irritation or burns.
Service
• Have your power tool serviced by a qualied repair person using only identical
replacement parts. This will ensure that the safety of the power tool is maintained.
Safety Warnings Common for Grinding, Abrasive Cutting-Off Operations
• This power tool is intended to function as a grinder or cut-off tool. Read all safety
warnings, instructions, illustrations and specications provided with this power tool.
Failure to follow all instructions listed below may result in electric shock, re and/or serious
injury.
• Operations such as sanding, wire brushing and polishing 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.
• Do not use accessories which are not specically designed and recommended by the
tool manufacturer. Just because the accessory can be attached to your power tool does
not ensure safe operation.
• 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.
• 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.
• Threaded mounting of accessories must match the grinder spindle thread. For
accessories mounted by anges, the arbour hole of the accessory must t the
locating diameter of the ange. Accessories that do not match the mounting hardware of
the power tool will run out of balance, vibrate excessively and may cause loss of control.
• 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,
and wire brush for loose or cracked wires. If power tool or accessory is dropped,
inspect for damage or install an undamaged accessory. After inspecting and
installing an accessory, position yourself and bystanders away from the plane of the
rotating accessory and run the power tool at maximum no-load speed for one minute.
Damaged accessories will normally break apart during this test time.
• 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 ltrating particles
generated by your operation. Prolonged exposure to high intensity noise may cause hearing
loss.

8
SAFETY INFORMATION
• Keep bystanders a safe distance away from work area. Anyone entering the work
area must wear personal protective equipment. Fragments of workpiece or of a broken
accessory may y away and cause injury beyond immediate area of operation.
• Hold the power tool by insulated gripping surfaces only, when performing an
operation where the cutting tool may contact hidden wiring. Contact with a “live” wire
will also make exposed metal parts of the power tool “live” and could give the operator an
electric shock.
• 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.
• 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.
• 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.
• Do not operate the power tool near ammable materials. Sparks could ignite these
materials.
• Do not use accessories that require liquid coolants. Using water or other liquid coolants
may result in electrocution or shock.
Further safety instructions for operation
Kickback and Related Warnings
Kickback is a sudden reaction to a pinched or snagged rotating wheel, backing pad, brush
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:
• Maintain a rm grip on the power tool and position your body and arm to allow you to
resist kickback forces. Always use auxiliary handle, if provided, for maximum control
over kickback or torque reaction during start up. The operator can control torque
reaction or kickback forces, if proper precautions are taken.
• Never place your hand near the rotating accessory. Accessory may kickback over your
hand.
• 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.
• 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.
• Do not attach a saw chain woodcarving blade or toothed saw blade. Such blades create
frequent kickback and loss of control.

9
SAFETY INFORMATION
Safety Warnings Specic for Grinding and Abrasive Cutting-Off Operations
• Use only wheel types that are recommended for your power tool and the specic
guard designed for the selected wheel. Wheels for which the power tool was not designed
cannot be adequately guarded and are unsafe.
• The grinding surface of center depressed wheels must be mounted below the plane of the
guard lip. An improperly mounted wheel that projects through the plane of the guard lip
cannot be adequately protected.
• The guard must be securely attached to the power tool and positioned for maximum
safety so the least amount of wheel is exposed toward the operator. The guard helps
to protect operator from broken wheel fragments, accidental contact with wheel fragments,
accidental contact with wheel and sparks that could ignite clothing.
• 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.
• 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.
• Do not use worn down wheels from larger power tools. Wheel intended for larger power
tool is not suitable for the higher speed of a smaller tool and may burst.
Additional Safety Warnings Specic for Abrasive Cutting-Off Operations
• Do not “jam” the cut-off wheel or apply excessive pressure. Do not attempt to make an
excessive depth of cut. Overstressing the wheel increases the loading and susceptibility to
twisting or binding of the wheel in the cut and the possibility of kickback or wheel breakage.
• Do not position your body in line with and behind the rotating wheel. When the wheel,
at the point of operation, is moving away from your body, the possible kickback may propel
the spinning wheel and the power tool directly at you.
• When wheel is binding or when interrupting a cut for any reason, switch off the power
tool and hold the power tool motionless until the wheel comes to a complete stop.
Never attempt to remove the cut-off wheel from the cut while the wheel is in motion,
otherwise kickback may occur. Investigate and take corrective action to eliminate the
cause of wheel binding.
• Do not restart the cutting operation in the workpiece. Let the wheel reach full speed
and carefully re-enter the cut. The wheel may bind, walk up or kickback if the power tool is
restarted in the workpiece.
• Support panels or any oversized workpiece to minimize the risk of wheel pinching and
kickback. Large workpieces tend to sag under their own weight. Supports must be placed
under the workpiece near the line of cut and near the edge of the workpiece on both sides of
the wheel.
• Use extra caution when making a “pocket cut” into existing walls or other blind areas.
The protruding wheel may cut gas or water pipes, electrical wiring or objects that can cause
kickback.

10
PREPARATION
Know Your Angle Grinder/Cut-off Tool
Before attempting to use the tool, familiarize yourself with all of its operating features and
safety requirements. Helpful tools (not included): Phillips screwdriver, athead screwdriver.
WARNING
• This product is only designed for grinding and cutting-off. Use for any other purpose is not
recommended and may result in serious injury.
• Do not allow familiarity with the tool to cause carelessness. Remember that one careless
moment is enough to cause severe injury. Before attempting to use any tool, be sure to
become familiar with all of the operating features and safety instructions.
• Do not attempt to modify this tool or create accessories not recommended for use with this
tool. Any such alteration or modication is misuse and could result in a hazardous condition
leading to possibly serious personal injury.
OPERATING INSTRUCTIONS
1. To Attach Battery Pack
a. Ensure that the paddle switch (E) is in the OFF
position.
b. Align the raised portion on the battery pack
with the grooves on the bottom of the tool, then
slide the battery pack onto the tool as shown.
c. Make sure that the latches on the battery pack
snap into place and the battery pack is secured
to the tool before beginning operation.
NOTICE: When placing the battery pack on the
tool, be sure that the raised rib on battery pack
aligns with the groove on the tool and the latches
snap into place properly. Improper attachment of
the battery pack can cause damage to internal
components.
To Detach Battery Pack
a. Ensure that the paddle switch (E) is in the
OFF position.
b. Press the battery-release button to release the
battery pack.
c. Pull forward on the battery pack to remove it
from the tool.
WARNING
• To reduce the risk of injury, always remove the
battery pack before making any adjustments or
changing accessories.
1a E
1b