Power Fist 8549727 User manual

5 in. Variable
Speed Angle
Grinder

5 in. Variable Speed
Angle Grinder

V4.0 5 in. Variable Speed Angle Grinder 8549727
SAFETY
WARNING! Read and understand all instructions before using this tool.
The operator must follow basic precautions to reduce the risk of
personal injury and/or damage to the equipment.
Keep this manual for safety warnings, precautions, operating or
inspection and maintenance instructions.
HAZARD DEFINITIONS
Please familiarize yourself with the hazard notices found in this manual. A
notice is an alert that there is a possibility of property damage, injury or
death if certain instructions are not followed.
DANGER! This notice indicates an immediate and specific hazard
that will result in severe personal injury or death if the
proper precautions are not taken.
WARNING! This notice indicates a specific hazard or unsafe practice
that could result in severe personal injury or death if the
proper precautions are not taken.
CAUTION! This notice indicates a potentially hazardous situation that
may result in minor or moderate injury if proper practices
are not taken.
NOTICE! This notice indicates that a specific hazard or unsafe
practice will result in equipment or property damage, but
not personal injury.
WORK AREA
1. Operate in a safe work environment. Keep your work area clean, well
lit and free of distractions.
2. Keep anyone not wearing the appropriate safety equipment away
from the work area.
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8549727 5 in. Variable Speed Angle Grinder V4.0
3. Store tools properly in a safe and dry location. Keep tools out of the
reach of children.
4. Do not use in explosive atmospheres such as the presence of
flammable gases or liquids.
PERSONAL SAFETY
WARNING! Wear personal protective equipment approved by the
Canadian Standards Association (CSA) or American National
Standards Institute (ANSI).
PERSONAL PROTECTIVE EQUIPMENT
1. Always wear impact safety goggles that provide front and side
protection for the eyes. Wear a full-face shield if your work creates
metal filings or wood chips.
a. Eye protection equipment should comply with ANSI
Z87.1 standards.
2. Wear gloves that provide protection based on the work materials or
to reduce the effects of tool vibration.
3. Non-skid footwear is recommended to maintain footing and balance
in the work environment.
4. Steel toe footwear or steel toe caps to prevent injury from
falling objects.
5. Wear protective clothing designed for the work environment and tool.
6. Wear a NIOSH approved respirator when working on materials that
produce dust or particulate matter.
7. Wear a hard hat to protect your head from falling objects.
PERSONAL PRECAUTIONS
Control the tool, personal movement and the work environment to avoid
personal injury or damage to the tool.
1. Do not operate any tool when tired or under the influence of drugs,
alcohol or medications.
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V4.0 5 in. Variable Speed Angle Grinder 8549727
2. Avoid wearing clothes or jewelry that can become entangled with the
moving parts of a tool. Keep long hair covered or bound.
3. Do not overreach when operating the tool. Proper footing and
balance enables better control in unexpected situations.
4. Support the workpiece or clamp it to a stable platform. Holding the
workpiece by hand or against your body may lead to personal injury.
5. Securely hold this tool using both hands. Using a tool with only one
hand can result in loss of control.
SPECIFIC SAFETY PRECAUTIONS
1. Do not start the tool when the grinding or cutting wheel is touching
the work piece.
2. Do not operate the tool without the safety guard attached.
3. Always ensure the safety guard is attached correctly.
4. Keep the power cord well away from the cutting area during use.
Always position the cord so that it will not be caught in the work
piece when the grinder is in use.
5. Always use both hands when operating the tool.
6. Do not use the tool on any materials containing asbestos.
7. Be careful not to damage the spindle, the flange (Especially the
installing surface) or the lock nut. Damage to these parts could result
in wheel breakage.
8. Never use tool with wood cutting blades or other saw blades. Such
blades when used on a grinder frequently kick and cause loss of
control leading to personal injury.
GRINDING TOOL PRECAUTIONS
WARNING! Some surfaces contain materials which can be toxic. When
working on materials that may contain lead, asbestos, copper
chromium arsenate or other toxic materials, extra care should be
taken to avoid inhalation and minimize skin contact.
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8549727 5 in. Variable Speed Angle Grinder V4.0
1. Only use a grinding wheel that exceeds the maximum RPM of the tool
(see Specifications).
2. Only use a grinding wheel with the correct arbor size and shape that
matches the grinder 's spindle.
3. Always ensure the safety guard is attached correctly and do not
operate the angle grinder without the guard attached.
4. Ensure the grinding wheel has a clean edge. Check the grinding wheel
for wear or chipping and replace if necessary.
5. Never install more than one wheel at a time.
6. Hold tool by insulated gripping surfaces when performing an
operation where the cutting tool may contact hidden wiring. Contact
with a live wire will electrify exposed metal parts of the tool and
shock the operator.
7. Before using the tool on the workpiece, run the tool at the highest
speed, without a load, for at least 30 seconds in a safe position. Stop
immediately if there is any vibration or wobbling that could indicate
poor installation or a poorly balanced grinding wheel. Check the tool
to determine the cause.
8. Do not allow the motor to overload or overheat. Take breaks to rest
the tool.
9. When the machine is in operation, keep hands away from the
grinding area.
10. Do not subject the grinding wheel to any lateral pressure as it may
damage the tool or cause it to kickback.
11. A large amount of sparks will be created when working with angle
grinder. Hold the tool so that sparks fly away from you and other
persons or flammable materials. Keep up to date fire-prevention
safety instructions in the event of a fire.
12. Do not place the tool down after use until the grinding wheel has
come to a complete stop. The grinding wheel will not stop
immediately when the machine is turned off.
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V4.0 5 in. Variable Speed Angle Grinder 8549727
13. Do not touch the grinding wheel or the workpiece surface worked on
with this tool. They may be hot and could inflict a burn injury.
14. Do not use a coolant or water with this angle grinder.
15. Do not use as a fixed grinder.
ELECTRICAL SAFETY
1. Disconnect power supply. Disconnect the tool from the power supply
when not in use, before cleaning, servicing or changing any parts.
2. Protect yourself against electric shocks when working on electrical
equipment. Avoid body contact with grounded surfaces such as
pipes, radiators, cooking stoves and refrigerators. There is an
increased chance of electrical shock if your body is grounded.
3. 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 a three wire grounded power cord and
grounded power supply system.
4. Grounded tools must be plugged into an outlet that is properly
installed and grounded in accordance with all codes and ordinances.
Never remove the grounding prong or modify the plug in any way. Do
not use any adapter plugs. Check with a qualified electrician if you are
in doubt as to whether the outlet is properly grounded. If the tool
should electronically malfunction or break down, grounding provides
a low resistance path to carry electricity away from the user.
5. Do not abuse the cord. Never use the cord to carry tools or pull the
plug from an outlet. Keep the cord away from heat, oil, sharp edges
or moving parts. Do not operate this tool if the power cord is frayed
or damaged. Replace damaged cords immediately. Damaged cords
increase the risk of electric shock. Do not modify the plug in any way.
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8549727 5 in. Variable Speed Angle Grinder V4.0
6. 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. Use in conjunction with a Ground
Fault Circuit Interrupter (GFCI). If operating a power tool in a damp
location is unavoidable, the use of a GFCI reduces the risk of electric
shock. It is recommended that the GFCI should have a rated residual
current of 30 mA or less.
7. Avoid using an unnecessarily long extension cord. Choose a cord that
is appropriate for the situation, as a cord that is too long and running
across the floor can be more dangerous than helpful. Using a cord
that is too long or too thin could damage the tool. Unroll the cord
completely to prevent it from overheating.
8. Place the electrical cord in a position that prevents it from coming
into contact with the tool and from getting caught by the work piece.
The cord should always stay behind the tool.
9. Keep all connections dry and off the ground to reduce the risk of
electric shock. Do not touch the plug with wet hands.
WARNING! People with pacemakers should consult their physician(s)
before using this product. Operations of electrical equipment in close
proximity to a heart pacemaker could cause interference or failure of
the pacemaker.
LOW VOLTAGE
Low voltage may cause overheating due to higher power current being
drawn to the tool that will shorten the motor life.
8
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V4.0 5 in. Variable Speed Angle Grinder 8549727
An extension cord may cause a drop in power to the tool if it is too long
or the amperage rating is not correct. This may result in the following:
1. The tool will not activate when switched on.
2. The tool may switch on, but fails to maintain power when applied to
a workpiece.
3. The tool may overheat, possibly starting a fire.
Test the tool by plugging it directly to the power supply. If it powers on,
change the extension cord with the correct rating and as short as needed.
The workpiece may also need to be relocated closer to the power supply.
KICKBACK PRECAUTIONS
Kickback is a sudden reaction to a pinched, bound or misaligned disc,
causing an uncontrolled tool to lift up and out of the workpiece toward
the operator; - when the disc is pinched or bound tightly by the
workpiece closing down, the disc stalls and the motor reaction drives the
tool rapidly back toward the operator. Kickback may result in loss of
control of the tool leading to serious personal injury and I or damage to
the workpiece and I or tool.
Kickback can be avoided by taking proper precautions:
1. Maintain a firm grip on the tool and position your body and arms to
allow you to resist kickback forces. Kickback will propel the tool in
the direction opposite to the wheel's movement at the time
of snagging.
2. Never place your hand near the disc. If kickback occurs, the disc may
pass over your hand and seriously injury you. Use clamps or a vice to
hold down the workpiece.
3. Use special care when working on corners, sharp edges etc. Corners,
sharp edges or bouncing have a tendency to snag the disc and cause
loss of control or kickback.
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8549727 5 in. Variable Speed Angle Grinder V4.0
4. When the disc is binding, or when interrupting a cut for any reason,
release the trigger and hold the tool motionless in the material until
the tool comes to a complete stop. Never attempt to remove the tool
from the workpiece or pull the tool backward while the disc is in
motion or kickback may occur. Investigate and take corrective actions
to eliminate the cause of disc binding.
5. When restarting a tool in the workpiece, center the disc in the cut and
check that the disc is not engaged into the material.
6. Support large panels to minimize the risk of disc pinching and
kickback. Large panels tend to sag under their own weight. Supports
must be placed under the panel on both sides, near the line of cut
and near the edge of the panel.
7. To minimize the risk of disc pinching and kickback, when cutting
operation requires the resting of the tool on the workpiece, the tool
should be rested on the larger portion and the smaller piece cut off.
8. Use extra caution when making a "plunge cut" into existing walls or
other blind areas. The protruding disc may cut objects that can
cause kickback.
9. Only use discs designed for tool. Do not use dull or damaged discs.
Unsharpened or improperly set discs produce narrow cut causing
excessive friction, disc binding and kickback. Keep discs sharp and
clean. Gum and wood pitch hardened on blades slows the tool and
increases potential for kickback.
10. Never force the tool. Forcing the tool can cause uneven cuts, loss of
accuracy, and possible kickback. Push the tool forward at a speed so
that the disc cuts without slowing.
VIBRATION PRECAUTIONS
This tool vibrates during use. Repeated or long-term exposure to
vibration may cause temporary or permanent physical injury, particularly
to the hands, arms and shoulders.
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V4.0 5 in. Variable Speed Angle Grinder 8549727
1. Anyone using vibrating tools regularly or for an extended period
should first be examined by a doctor and then have regular medical
check-ups to ensure medical problems are not being caused by or
worsened from tool use. Pregnant women or people who have
impaired blood circulation to the hands, past hand injuries, nervous
system disorders, diabetes or Raynaud's Disease should not use this
tool. If you feel any medical symptoms related to vibrations (such as
tingling, numbness, and white or blue fingers), seek medical attention
as soon as possible.
2. Do not smoke during use. Nicotine reduces the blood flow to the
hands and fingers, increasing the risk of vibration-related injury.
3. Wear suitable gloves to reduce the vibration effects on the user.
Gloves must not be loose fitting.
4. Use tools with the lowest amount of vibration when there is a choice
between different processes.
5. Do not use for extended periods. Take frequent breaks when using
this tool.
6. Let the tool do the work. Grip the tool as lightly as possible (while
still keeping safe control of it).
7. To reduce vibrations, maintain the tool as explained in this manual. If
abnormal vibrations occur, stop using this tool immediately.
USE AND CARE OF THE TOOL
WARNING! Do not use the tool if the throttle does not function
properly. Any tool that cannot be controlled with the ON I OFF switch is
dangerous and must be repaired.
1. Use the correct tool for the job. Maximize performance and safety by
using the tool for its intended task.
2. Do not modify this tool or use for a purpose for which it was
not designed.
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8549727 5in. Variable Speed Angle Grinder
3. This tool was designed for a specific function.
Do Not:
V4.0
a. Modify or alter the tool, all parts and accessories are designed
with built-in safety features that may be compromised if altered.
b. Use the tool in a way for which it was not designed.
4. Avoid unintentional starts. Be sure the throttle is in the OFF position
when not in use and before connecting it to any power source.
5. Remove adjusting keys and wrenches. Check that keys and adjusting
wrenches are removed from the tool before connecting it. A wrench
or key that is left attached to a rotating part of the tool increases the
risk of personal injury.
ASSEMBLY
WARNING! Always be sure that the tool is switched off, unplugged and
has stopped moving before attempting to perform any adjustments.
ACCESSORIES
The accessories or attachments recommended for use with this tool are
specified in this manual.
WARNING! The tool is supplied with a guard for use with a depressed
center grinding wheel, multi-disc, flex wheel, and wire wheel brush. A
cut-off wheel can also be used with an optional guard. If you decide to
use your grinder with other accessories, be sure to obtain and use all
necessary fasteners and guards as recommended in this manual.
Failure to do so could result in serious personal injury to yourself
and others.
1. Do not use accessories that are not specifically designed for this tool.
12
Just because an accessory can be attached does not mean that it is
safe to do so.
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V4.0 5 in. Variable Speed Angle Grinder 8549727
2. The arbor size of wheels, backing pads, or any other accessory must
properly fit the spindle of the power tool.
a. Accessories that do not match the mounting hardware of this tool
will lose balance, vibrate excessively, and may cause a loss
of control.
3. Do not use damaged accessories.
a. Always inspect accessories before each use.
b. Inspect abrasive wheels for chips and cracks, backing pads for
cracks, tear or excess wear, and wire brushes for loose or
cracked wires.
c. If the power tool or accessory is dropped, inspect for damage and
install an undamaged accessory.
d. After inspection and installation, position yourself and bystanders
away from the plane of the rotating accessory and run the tool at
maximum speed under no load for one minute. Damaged
accessories will normally break apart during this test time.
ADJUSTABLE SIDE HANDLE
This tool provides the option of 2 working positions to provide the safest
and most comfortable control of the angle grinder. The side handle may
be screwed in by turning it clockwise into the screw holes on either side
and on top of the tool.
WARNING! Always ensure that the side handle is securely installed
before operation.
INSTALLATION OF THE GRINDING WHEEL/DISC
CAUTION! Always be sure that the tool is switched off, unplugged and
has stopped moving before attempting to perform any adjustments.
1. Place the backing washer over the spindle, making sure the fit
is tight.
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8549727 5 in. Variable Speed Angle Grinder V4.0
2. Place the grinding or cutting wheel on the top of the backing washer
ensuring the bore fits into the step of the flange.
3. Mount the concave recess side of the locking nut over the spindle.
4. Press the spindle lock and ensure there is no movement in the
spindle. Then while the spindle lock is depressed tighten the locking
nut in a clockwise direction using the pin spanner.
5. Allow the angle grinder to run idle for at least a minute with the
grinding or cutting disc correctly assembled.
NOTE: A vibrating wheel should immediately be re-installed and tested. If
the wheel continues to vibrate, replace with a new one.
CAUTION! Only use discs from well-known manufacturers before the
expiry date that is indicated on the package.
NOTE: A disc's properties are greatly influenced by the conditions
of storage.
IMPORTANT! Put the protruding part of the outer flange close to disc if
you are mounting a grinding disc, put the protruding part of the outer
flange outside if you are mounting a cut-off disc.
OPERATION
WARNING! Do not force the tool. The weight of the tool will apply
adequate pressure. Force and excessive pressure could cause wheel
breakage and serious personal injury.
1. Disconnect the plug from the power source.
2. Fit the appropriate disc onto the grinder.
3. Plug the tool into a power source.
4. Allow the grinder to run idle for one minute before use.
5. Do not cover the tool's exhaust vents when in use. This may damage
the motor.
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V4.0 5 in. Variable Speed Angle Grinder 8549727
6. For best results, hold the grinder at a 15 to 30° angle to
the workpiece.
7. Use the Side Handle to help steady the tool and glide back and forth
in a steady motion.
8. Do not tilt the tool when cutting or grinding.
9. Use a diamond cutting wheel when cutting hard stone.
10. Do not use a cutting wheel for rough grinding.
11. Do not put the tool down until it has completely stopped moving. The
disc will continue to spin for a short amount of time after the tool is
switched off.
12. Immediately shut off the tool and have it examined by a qualified
technician if any of the following occurs.
a. The tool's moving parts get stuck or their speed drops
abnormally low.
b. The tool shakes abnormally, followed by unusual noise.
c. The motor housing gets hot and/or an odour is present.
d. Heavy sparks occur around the motor area.
13. Always replace the wheel if the tool is dropped during operation.
14. Do not bang or hit a grinding disc against the workpiece.
15. Do not bounce or snag the wheel, especially when working corners,
sharp edges, etc. This can cause loss of control and kickback.
SPINDLE LOCK
CAUTION! Do not use the spindle lock while the spindle is moving or
when the tool is connected to the power source. This may damage the
tool. Use the spindle lock only when installing or removing
accessories to prevent spindle movement.
To use the spindle lock, hold down the spindle lock button (24) and turn
the spindle by hand until the assembly clicks and locks into place.
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8549727 5 in. Variable Speed Angle Grinder V4.0
GRINDING AND SANDING OPERATION
1. Always hold the tool firmly with one hand on the housing and one
hand on the Side Handle.
2. Turn the tool on and apply the wheel or disc to the workpiece.
WARNING! Do not start the tool when the wheel or disc is touching
the workpiece.
3. In general, keep the wheel or disc at an angle of about 15° to the
surface of the workpiece.
4. Do not run the tool in reverse during the break-in period of a new
wheel. The wheel may be worked in forward and reverse once the
edge of the wheel has been rounded off by use.
5. Do not use cut-off wheels for side grinding.
6. Do not change the angle of the wheel during cutting operations. This
will cause the wheel to crack and break, causing serious
personal injury.
MAINTENANCE
CAUTION! Disconnect the power cord from the power supply before
any maintenance or cleaning. Do not use water or corrosive fluids to
clean electrical parts of the tool.
1. Maintain the tool with care. A tool in good condition is efficient,
easier to control and will prevent unnecessary problems.
2. Keep the tool handles clean, dry and free from oil/grease at all times.
3. Follow instructions for lubricating and changing accessories.
4. Inspect the tool fittings periodically. Have damaged or worn
components repaired or replaced by an authorized technician.
5. Inspect the tool fittings, alignment, power supply cord and
components periodically. Have damaged or worn components
repaired or replaced by an authorized technician.
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V4.0 5 in. Variable Speed Angle Grinder 8549727
6. Sharp tools are safer than dull tools. Applying excessive force while
using a dull tool can lead to slips and cause damage to your work
piece or personal injury.
7. Maintain the tool's label and name plate. These carry important
information. If unreadable or missing, contact Princess Auto Ltd.
for replacements.
8. Periodically check the carbon brushes and replace worn out brushes
(see Replacing Carbon Brushes).
9. Keep the vent passages clear of accumulated dirt, dust, and oil.
10. Clean the tool after each use.
WARNING! Only qualified service personnel should repair the tool. An
improperly repaired tool may present a hazard to the user
and/or others.
INSPECTION
1. The stator (motor) is the heart of the power tool. Exercise care to
ensure it does not become damaged by oil or water. Do not use the
tool until you have discovered and corrected the problem if you hear
the stator making unusual noises or if you notice smoke or sparks
coming out of the stator.
2. Inspect the carbon brushes regularly and replace them when 2/3 of
each brush is worn down.
3. Inspect all mountings and screws regularly and ensure that they are
properly tightened.
4. Inspect the grinding wheel and ensure that it is free of cracks and
surface defects. Replace the grinding wheel immediately when it
becomes worn down.
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8549727 5 in. Variable Speed Angle Grinder V4.0
REPLACING CARBON BRUSHES
NOTE: Always replace all carbon brushes at the same time.
1. Using the included parts list, locate the carbon brushes.
2. Remove the screws from the body.
3. Pry the main body of the tool open using a flat head screwdriver.
4. Remove the old brushes.
5. Insert the new brushes.
6. Run the motor for at least 15 minutes without load to align the new
brushes with the commutator.
LUBRICATION
All bearings in this tool are lubricated with a sufficient amount of high
grade lubricant for the life of the tool under normal conditions. Therefore,
no further lubrication is required.
NOTICE! NEVER use a penetrating oil to lubricate the tool. Penetrating
oil may act as a solvent that will break down the grease and cause the
tool to seize up.
STORAGE
When not in use for an extended period, store the tool in a cool dry place,
out of the reach of children.
DISPOSAL
Recycle a tool damaged beyond repair at the appropriate facility.
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V4.0 5 in. Variable Speed Angle Grinder 8549727
TROUBLESHOOTING
Contact Princess Auto Ltd. for a solution if the tool does not function
properly or parts are missing. If unable to do so, have a qualified
technician service the tool.
Problem(s) Possible Cause(s)
Suggested Solution(s)
The tool will
Power supply is Plug the tool into a
not operate. incorrect for the tool's
120V 60Hz
electrical rating. power supply.
Tool is not properly Ensure that the tool's
attached to the power cord is
power supply. connected securely to
the power supply and
that the cord is not
damaged in anyway.
The wheel The wheel may not be Tighten the nut that
moves slowly. securely attached.
attaches the wheel to
the spindle.
The tool components
Disconnect the tool
may need cleaning. from the power supply
and clean the
components of
the spindle.
Smoke results
There is a buildup of Immediately switch off
from operating
rust or debris in the tool and disconnect
the tool. the wheel.
from the power supply.
Remove the wheel from
the spindle and clean
all components.
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8549727 5in. Variable Speed Angle Grinder V4.0
PARTS BREAKDOWN
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