Skil 7290 Instruction Manual
Operating/Safety Instructions
Consignes de fonctionnement/sécurité
Instrucciones de funcionamiento
y seguridad
IMPORTANT: IMPORTANT : IMPORTANTE:
Read Before Using Lire avant usage Leer antes de usar
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Renseignement des consommateurs
Información para el consumidor
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7290
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Read and understand all instructions. Failure to follow all instructions listed
below, may result in electric shock, fire and/or serious personal injury.
SAVE THESE INSTRUCTIONS
-2-
Work Area
Keep your work area clean and well lit.
Cluttered benches and 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 by-standers, children, and visitors
away while operating a power tool.
Distractions can cause you to lose control.
Electrical Safety
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 the
three wire grounded power cord and
grounded power supply system. Before
plugging in the tool, be certain the outlet
voltage supplied is within the voltage marked
on the nameplate. Do not use “AC only”
rated tools with a DC power supply.
Avoid body contact with grounded surfaces
such as pipes, radiators, ranges and
refrigerators. There is an increased risk of
electric shock if your body is grounded. If
operating the power tool in damp locations is
unavoidable, a Ground Fault Circuit Interrupter
must be used to supply the power to your
tool. Electrician’s rubber gloves and footwear
will further enhance your personal safety.
Don't 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
to carry the tools or pull the plug from an
outlet. Keep cord away from heat, oil, sharp
edges or moving parts. Replace damaged
cords immediately. Damaged cords increase
the risk of electric shock.
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. Refer to
“Recommended sizes of Extension Cords” in
the Accessory section of this manual.
Personal Safety
Stay alert, watch what you are doing and
use common sense when operating a
power tool. Do not use 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.
Dress properly. Do not wear loose clothing
or jewelry. Contain long hair. Keep your
hair, clothing, and gloves away from
moving parts. Loose clothes, jewelry, or long
hair can be caught in moving parts. Keep
handles dry, clean and free from oil and
grease.
Avoid accidental starting. Be sure switch is
“OFF” before plugging in. Carrying tools with
your finger on the switch or plugging in tools
that have the switch “ON” invites accidents.
Remove adjusting keys or wrenches before
turning the tool “ON”. A wrench or a key that
is left attached to a rotating part of the tool
may result in personal injury.
Do not overreach. Keep proper footing and
balance at all times. Proper footing and
balance enables better control of the tool in
unexpected situations.
Use safety equipment. Always wear eye
protection. Dust mask, non-skid safety
shoes, hard hat, or hearing protection must be
used for appropriate conditions.
Tool Use and Care
Use clamps or other practical way to
secure and support the workpiece to a
stable platform. Holding the work by hand or
against your body is unstable and may lead to
loss of control.
Do not force tool. Use the correct tool for
your application. The correct tool will do the
!
WARNING
Power Tool Safety Rules
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Safety Rules for Orbital Sanders
job better and safer at the rate for which it is
designed.
Do not use tool if switch does not turn it
“ON” or “OFF”. Any tool that cannot be
controlled with the switch is dangerous and
must be repaired.
Disconnect the plug from the power source
before making any adjustments, changing
accessories, or storing the tool. Such
preventive safety measures reduce the risk of
starting the tool accidentally.
Store idle tools out of reach of children and
other untrained persons. Tools are
dangerous in the hands of untrained users.
Maintain tools with care. Keep cutting tools
sharp and clean. Properly maintained tools,
with sharp cutting edges are less likely to bind
and are easier to control. Any alteration or
modification is a misuse and may result in a
dangerous condition.
Check for misalignment or binding of
moving parts, breakage of parts, and any
other condition that may affect the tools
operation. If damaged, have the tool
serviced before using. Many accidents are
caused by poorly maintained tools. Develop a
periodic maintenance schedule for your tool.
Use only accessories that are
recommended by the manufacturer for
your model. Accessories that may be suitable
for one tool, may become hazardous when
used on another tool.
Service
Tool service must be performed only by
qualified repair personnel. Service or
maintenance performed by unqualified
personnel could result in a risk of injury. For
example: internal wires may be misplaced or
pinched, safety guard return springs may be
improperly mounted.
When servicing a tool, use only identical
replacement parts. Follow instructions in
the Maintenance section of this manual.
Use of unauthorized parts or failure to follow
Maintenance Instructions may create a risk of
electric shock or injury. Certain cleaning
agents such as gasoline, carbon tetrachloride,
ammonia, etc. may damage plastic parts.
Unplug the sander before changing
accessories. Accidental start-ups may
occur if sander is plugged in while changing
an accessory.
Your tool is equipped with a dust
canister, empty it frequently, after
completion of sanding and before storing
the sander. Be extremely careful of dust
disposal, materials in fine particle form may
be explosive. Do not throw sanding dust on
an open fire. Combustion from mixture of
varnishes, lacquers, polyurethane, oil or
water with dust particles can occur if there is
a static discharge, spark introduced in the
box, or excessive heat.
Always wear eye and respiratory
protection for dusty applications and
when sanding overhead. Sanding particles
can be absorbed by your eyes and inhaled
easily and may cause health complications.
Use special precautions when sanding
chemically pressure treated lumber, paint
that may be lead based, or any other
materials that may contain carcinogens.
A suitable breathing respirator and
protective clothing must be worn by all
persons entering the work area. Work area
should be sealed by plastic sheeting and
persons not protected should be kept out
until work area is thoroughly cleaned.
Do not wet sand with this sander. Liquids
entering the motor housing is an electrical
shock hazard.
Do not use sandpaper intended for larger
sanding pads. Larger sandpaper will extend
beyond the sanding pad causing snagging,
tearing of the paper or kick-back. Extra
paper extending beyond the sanding pad
can also cause serious lacerations.
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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 chemicallytreated lumber.
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.
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!
WARNING
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IMPORTANT: Some of the following symbols may be used on your tool. Please study them
and learn their meaning. Proper interpretation of these symbols will allow you to operate the
tool better and safer.
Symbol Name Designation/Explanation
V Volts Voltage (potential)
A Amperes Current
Hz Hertz Frequency (cycles per second)
W Watt Power
kg Kilograms Weight
min Minutes Time
s Seconds Time
Diameter Size of drill bits, grinding wheels, etc.
n
0
No load speed Rotational speed, at no load
.../min Revolutions or reciprocation per minute Revolutions, strokes, surface speed,
orbits etc. per minute
0 Off position Zero speed, zero torque...
1, 2, 3, ... Selector settings Speed, torque or position settings.
I, II, III, Higher number means greater speed
Infinitely variable selector with off Speed is increasing from 0 setting
Arrow Action in the direction of arrow
Alternating current Type or a characteristic of current
Direct current Type or a characteristic of current
Alternating or direct current Type or a characteristic of current
Class II construction Designates Double Insulated
Construction tools.
Earthing terminal Grounding terminal
Warning symbol Alerts user to warning messages
Ni-Cad RBRC seal Designates Ni-Cad battery recycling
program
Symbols
0
This symbol designates
that this tool is listed by
Underwriters Laboratories.
This symbol designates
that this tool is listed by
the Canadian Standards
Association.
This symbol designates
that this tool is listed to
Canadian Standards by
Underwriters Laboratories.
This symbol
designates
that
this tool
complies
to NOM
Mexican
Standards.
This symbol designates
that this tool is listed by
Underwriters Laboratories,
and listed to Canadian
Standards by Underwriters
Laboratories.
This symbol designates that this tool is listed by
Intertek Testing Services.
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Functional Description and Specifications
Disconnect the plug from the power source before making any
assembly, adjustments or changing accessories. Such preventive safety
measures reduce the risk of starting the tool accidentally.
!
WARNING
Orbital Sander
Model number 7290
Voltage rating 120 V 60Hz
Pad size 4 5/16" x 4"
Abrasive sheet size 5 1/2" x 4 1/2"
FIG. 1
SWITCH
PAD
CLAMPER
GRIP
CLAMP LEVER
CORD
FIG. 2
NOTE: For tool specifications refer to the nameplate on your tool.
RELEASE
TABS
DUST
PORT
DUST
CANISTER
LID
DUST
CANISTER
VENTILATION
OPENINGS
TAB
PUNCH PLATE
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Always disconnect the plug
from the power source before
attaching or removing abrasive sheets.
ATTACHING ABRASIVE SHEET
1. To open clamper grip, push down clamp
lever so it is positioned as shown in (Fig. 3).
2. Place the abrasive sheet (grit side up)
between the clamper grip and base plate while
aligning edges of the abrasive sheet with either
edge of the pad. (Pre-bending the sheet makes
attachment easier.)
3. After inserting the sheet, release pressure on
clamp lever making sure the clamper grips are
secure.
4. Wrap the sheet around the length of the pad
and attach free end of sheet under opposite
clamp and repeat procedures 1, 2, & 3 above.
The abrasive sheet must be drawn as tight as
possible for efficient sanding, as a loose sheet
can slip on the work surface.
PUNCH PLATE
After the paper has been installed, it will be
necessary to punch holes into the paper with
the use of the punch plate provided with
your sander. Align sander base with punch
plate and push down on sander until punch
plate pierces the paper. Then remove punch
plate from sander (Fig. 1).
Assembly
!
WARNING
CLAMP LEVER
PAD
FIG. 3
CLAMPER
GRIP
DUST COLLECTION CANISTER
The integral dust extraction system collects
sanding dust in canister supplied with your
sander. For maximum efficiency, the dust
canister should be emptied frequently during
operation.
Your tool is equipped with
a dust canister, empty it
frequently, after completion of sanding
and before storing the sander. Be
extremely careful of dust disposal, materials
in fine particle form may be explosive. Do
not throw sanding dust on an open fire.
Combustion from mixture of varnishes,
lacquers, polyurethane, oil or water with
dust particles can occur if there is a static
discharge, spark introduced in the box, or
excessive heat.
REMOVING AND INSTALLING
DUST CANISTER
To remove dust canister, squeeze release
tabs on both sides of canister and simply pull
away from the tool (Fig. 1).
To install dust canister, align dust port with
hole in canister and push canister onto tool
until it locks into place.
Operating Instructions
ROCKER “ON/OFF” SWITCH
TO TURN THE TOOL “ON” or “OFF”: Push IN
the switch rocker to the left or right side of the
tool.
Always hold the sander off the work when
turning the switch “ON” or “OFF”. Contact the
work with the tool after sander has reached its
full speed and remove it from the work before
turning the switch “OFF”. Operating in this
manner will prolong switch and motor life and
will greatly increase the quality of your work.
SKIL Orbital Sanders are designed to produce
exceptional finishes on wood surfaces, speed
stock removal, or to remove lacquer, varnish,
and other coated finishes.
Orbital sanding provides fast, smooth final finishes. And this model can sand flush on all
three sides of the tool, to get in tight places
typical of cabinets, desks and shelving.
!
WARNING
ABRASIVE
SHEET
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ABRASIVE SHEETS
Aluminum oxide, silicon carbide, or other
synthetic abrasives are recommended for
power sanding use. Natural abrasives, such as
flint or garnet sheet are too soft for economical
use in power sanding. For best results, use Skil
abrasive sheets: The uniform spacing between
grains minimizes filling or loading. The high
quality aluminum oxide sheet with heavy
backing, cuts faster and lasts longer.
The following are recommended abrasive
sheets and applications:
1. Coarse Grit: For rough wood sanding.
2. Medium Grit: For general wood sanding.
3. Fine Grit: For smoothing wood or
plaster patches.
4. Extra Fine Grit: For final sanding bare
wood and smoothing old
paint.
Sanding Tips
This sander has been designed for even
weight distribution which virtually eliminates
the use of pressure. Excessive pressure to the
sander may result in an uneven sanding job
and premature grit wear. Constant and
excessive pressure can cause overheating and
possible damage to the motor as well as
premature wear out of the pad on hook and
loop models.
It's usually best to work in strokes that parallel
the grain, using some lateral motion so the
main strokes are overlapped as much as
75%.
If the surface is rough, start sanding with a
coarse grit sheet, then medium and then finish
with a fine or extra fine abrasive. This
procedure will vary with different types of
materials and work. Continue to sand with
each grit until the surface looks uniform. When
going from one grit size to a finer size, do not
skip more than two sizes.
To remove the greatest amount of stock, use a
coarse grit and move the sander steadily over
the entire surface against the grain as well as
with the grain. DO NOT REMAIN IN ONE
SPOT TOO LONG. It may remove too much
material and uneven sanding will result.
Sanding with the grain of the wood gives the
smoothest final finish.
Additional abrasive sheets can be conveniently
cut from large-size commercially available
sheets (standard size: 9" x 11-1/16"; 228 x
280mm). Cut into four pieces of equal size as
shown (Fig. 4). Choose the proper grit for the
job.
-8-
CLEANING AND EMPTYING
THE DUST CANISTER
To empty canister, hold canister as shown
and maintain a firm grip (Fig. 2). Firmly push
upward on tab on corner of lid, and remove
from canister. Knock excess dust out of the
micro filter, or remove dust with your fingers
or a soft brush.
You may notice that all the dust may not
come out of the canister. This will not affect
sanding performance but will reduce dust
collection efficiency.
NOTE: Do not wash the micro filter with soap
and water. Dust may become more firmly
lodged in the pores, which will reduce dust
collection, and damage the micro filter.
CUT HERE
11-1/16" (280mm)
9" (228mm)
FIG. 4
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Accessories
Service
Preventive maintenance
performed by unauthorized
personnel may result in misplacing of
internal wires and components which
could cause serious hazard. We
recommend that all tool service be performed
by a Skil Factory Service Center or Authorized Skil Service Station.
TOOL LUBRICATION
Your Skil tool has been properly lubricated
and is ready to use. It is recommended that
tools with gears be regreased with a special
gear lubricant at every brush change.
CARBON BRUSHES
The brushes and commutator in your tool
have been engineered for many hours of
dependable service. To maintain peak
efficiency of the motor, we recommend every
two to six months the brushes be examined.
Only genuine Skil replacement brushes
specially designed for your tool should be
used.
BEARINGS
After about 300-400 hours of operation, or at
every second brush change, the bearings
should be replaced at Skil Factory Service
Center or Authorized Skil Service Station.
Bearings which become noisy (due to heavy
load or very abrasive material cutting) should
be replaced at once to avoid overheating or
motor failure.
Cleaning
To avoid accidents always
disconnect the tool from
the power supply before cleaning or
performing any maintenance. The tool may
be cleaned most effectively with compressed
dry air. Always wear safety goggles when
cleaning tools with compressed air.
Ventilation openings and switch levers must
be kept clean and free of foreign matter. Do
not attempt to clean by inserting pointed
objects through openings.
Certain cleaning agents
and solvents damage
plastic parts. Some of these are: gasoline,
carbon tetrachloride, chlorinated cleaning
solvents, ammonia and household detergents
that contain ammonia.
!
WARNING
!
WARNING
Maintenance
!
CAUTION
If an extension cord is
necessary, a cord with
adequate size conductors that is capable
of carrying the current necessary for your
tool must be used. This will prevent
excessive voltage drop, loss of power or
overheating. Grounded tools must use 3wire extension cords that have 3-prong
plugs and receptacles.
NOTE: The smaller the gauge number, the
heavier the cord.
RECOMMENDED SIZES OF EXTENSION CORDS
120 VOLT ALTERNATING CURRENT TOOLS
!
WARNING
Tool’s
Ampere
Rating
Cord Size in A.W.G.
Wire Sizes in mm
2
3-6
6-8
8-10
10-12
12-16
18 16 16 14 0.75 0.75 1.5 2.5
18 16 14 12 0.75 1.0 2.5 4.0
18 16 14 12 0.75 1.0 2.5 4.0
16 16 14 12 1.0 2.5 4.0 —
14 12 — — — — — —
25 50 100 150 15 30 60 120
Cord Length in Feet Cord Length in Meters
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