Mastercraft 054-7120-4 User Manual

INSTRUCTION MANUAL

ANGLE GRINDER

054-7120-4

If any parts are
missing or damaged,
or if you have any
questions, please call
our toll-free helpline
at 1-800-689-9928.

Read and understand this instruction manual
thoroughly before using the product. It contains
important information for your safety as well as
operating and maintenance advice.

Keep this instruction manual for future use. Should
this product be passed on to a third party, then this
instruction manual must be included.

ANGLE GRINDER - 054-7120-4

TECHNICAL SPECIFICATIONS 3

SAFETY GUIDELINES 4–9

DESCRIPTION 10

OPERATING INSTRUCTIONS 11–16

MAINTENANCE 17–18

TROUBLESHOOTING 19

PARTS LIST 20–21

WARRANTY 22–23

2

TABLE OF CONTENTS

ANGLE GRINDER - 054-7120-4

3

RATED POWER INPUT 5A

RATING 120 V ~ 60 Hz

RATED SPEED 11,000 RPM

WHEEL DIAMETER 4 1/2"

ARBOR SIZE 5/8"

RECOMMENDED WHEEL Type 27

TOOL WEIGHT 3 lb 15 oz

TECHNICAL SPECIFICATIONS

(115 mm)

(1.79 kg)

ANGLE GRINDER - 054-7120-4

WARNING!

Safety symbols in this Instruction Manual are used to flag possible dangers. The safety
symbols and their explanations require your full understanding. The safety warnings do
not, by themselves, eliminate any danger, nor are they substitutes for proper accident
prevention measures.

WARNING!

This Safety Alert Symbol indicates caution, warning, or danger. Failure to obey a safety
warning can result in serious injury to yourself or others. To reduce the risk of injury, fire, or
electric shock, always follow the safety precautions.

Know your tool

To operate this tool, carefully read this Instruction Manual and all labels affixed to the Angle Grinder
before using. Keep this manual available for future reference.

Important

This tool should only be serviced by a qualified service technician. For more information, call the toll­free helpline at 1-800-689-9928.

Read all instructions thoroughly

4

Save these instructions

General power tool safety warnings

WARNING!

Read all safety warnings and instructions. Failure to follow the warnings and instructions
may result in electric shock, fire 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.

ANGLE GRINDER - 054-7120-4

SAFETY GUIDELINES

5

Work area safety

• Keep the 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
flammable 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 adapter plugs with earthed (grounded) power tools. Unmodified plugs and matching

outlets will reduce the risk of electric shock.

• 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.

• Do not 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 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.

• 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.

SAFETY GUIDELINES

Personal safety

• Stay alert, watch what you are doing and use common sense when operating a power tool.
Do not use the 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.

• 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 finger on the switch or energising power tools that have the switch on invites accidents.

ANGLE GRINDER - 054-7120-4

• 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 jewellery. Keep your hair, clothing and gloves
away from moving parts. Loose clothes, jewellery 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 more safely 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.

6

SAFETY GUIDELINES

Service

• 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.

ANGLE GRINDER - 054-7120-4

7

Safety guidelines for angle grinder

• This power tool is intended to function as a grinder. Read all safety warnings,
instructions, illustrations and specifications provided with this power tool. Failure to follow

all instructions listed below may result in electric shock, fire and/or serious injury.

• 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.

• Do not use accessories that are not specifically designed and recommended by the tool
manufacturer. Just because the accessory can be attached to your power tool, safe operation is

not assured.

• 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 fly 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.

• The arbor size of wheels, flanges or any other accessory must properly fit 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.

• Do not use a damaged accessory. Before each use inspect the accessory. If the power tool
or accessory is dropped, inspect it 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 a face shield, safety

SAFETY GUIDELINES

goggles or safety glasses. As appropriate, wear a dust mask, hearing protectors, gloves
and workshop apron capable of stopping small abrasive or workpiece fragments. The eye
protection must be capable of stopping flying debris generated by various operations.

The dust mask or respirator must be capable of filtrating particles generated by your operation.
Prolonged exposure to high intensity noise may cause hearing loss.

• 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 fly away and cause injury beyond the immediate area of operation.

• Hold the power tool by the insulated gripping surfaces only when performing an
operation where the grinding 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 could give the operator an electric shock.

• 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.

ANGLE GRINDER - 054-7120-4