Porter-Cable 7313 User Manual
SM 2610929106 3-05 3/15/05 10:33 PM Page 1
IMPORTANT: IMPORTANT : IMPORTANTE:
Read Before Using Lire avant usage Leer antes de usar
Operating/Safety Instructions
Consignes de fonctionnement/sécurité
Instrucciones de funcionamiento y seguridad
7313
Call Toll Free
for Consumer Information
& Service Locations
1-877-SKIL999 (1-877-754-5999) www.skil.com
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SM 2610929106 3-05 3/15/05 10:33 PM Page 2
Power Tool Safety Rules
!
WARNING
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
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.
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.
Power
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.
Insulation eliminates the need for the
three wire grounded power cord and
grounded power supply system.
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.
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.
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.
the risk of electric shock.
There is an increased risk
Water entering a power tool will
Damaged cords increase
Double
Before
When operating a power tool outside, use
an outdoor extension cord marked "W-A"
or "W."
and reduce the risk of electric shock. Refer to
“Recommended sizes of Extension Cords” in
the Accessory section of this manual.
These cords are rated for outdoor use
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.
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.
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.
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”.
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.
balance enables better control of the tool in
unexpected situations.
Use safety equipment. Always wear eye
protection.
hard hat, or hearing protection must be used
for appropriate conditions.
A moment of inattention while
Loose clothes, jewelry, or long
Carrying tools with
A wrench or a key that
Proper footing and
Dust mask, non-skid safety shoes,
Tool Use and Care
Use clamps or other practical way to
secure and support the workpiece to a
stable platform.
against your body is unstable and may lead to
loss of control.
Do not force tool. Use the correct tool for
your application.
Holding the work by hand or
The correct tool will do the
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SM 2610929106 3-05 3/15/05 10:33 PM Page 3
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”.
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.
preventive safety measures reduce the risk of
starting the tool accidentally.
Store idle tools out of reach of children and
other untrained persons.
dangerous in the hands of untrained users.
Maintain tools with care. Keep cutting tools
sharp and clean.
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
Any tool that cannot be
Such
Tools are
Properly maintained tools,
serviced before using.
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.
for one tool, may become hazardous when
used on another tool.
Accessories that may be suitable
Many accidents are
Service
Tool service must be performed only by
qualified repair personnel.
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.
Service or
Belt Sander Safety Rules
Hold tool by insulated gripping surfaces
when performing a operation where the
cutting tool may contact hidden wiring or
its own cord.
make exposed metal parts of the tool "live"
and shock the operator.
Never leave the trigger locked “ON”.
Before plugging the tool in, check that the
trigger lock is “OFF”.
could cause injury.
Unplug the sander before changing
accessories.
if sander is plugged in while changing an
accessory.
Keep your fingers and clothing away from
the belt.
between the pulley, belt and motor housing.
Properly adjust tracking of belt to avoid it
overhanging the housing.
overhanging its housing can cause severe
lacerations.
Be aware of the location and setting of
the Switch "Lock-ON" Button.
Contact with a "live" wire will
Accidental start-ups
Accidental start-ups may occur
They could get cut or wedged
A running belt
If the switch
is locked "ON", be ready for emergency
situations to switch it "OFF", by first pulling
the trigger then immediately releasing it
without pressing the "Lock-ON" button.
Keep the cord to the side away from
pulleys.
housing and become entangled with the
pulleys.
Clamp or secure workpiece when
sanding.
from being ejected from under the sander
and leaves both hands to control the tool.
Clamp or secure sander if it is inverted
and bench mounted for use as a table
sander. Always use edge stop or guide
when sanding short or small workpieces.
Fingers or clothing can be dragged into
pulley and housing area.
Do not wet sand with this sander. Liquids
entering the motor housing is an electrical
shock hazard.
If your tool is equipped with a dust bag,
empty it frequently and after completion
The cord can be dragged into belt
Clamping the workpiece prevents it
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of sanding. Be extremely careful of dust
disposal, materials in fine particle form may
be explosive. Do not throw sanding dust on
a
n open fire. Spontaneous combustion, may
i
n time, result from mixture of oil or water with
dust particles.
Portable belt sanders are not intended to be
permanently mounted as a bench or table
sander. There are accessories available
which can convert certain portable belt
sanders for occasional stationary use. If such
accessories are used always clamp or
secure sander when inverted and bench
mounted for use as a table sander. Be aware
of switch location and know how to shut off
the tool in emergency situations. Always
follow directions included with the accessory.
Use sanding fence, stop or guide when
sanding short or small workpieces.
!
WARNING
grinding, drilling, and other construction
a
ctivities contains chemicals known to
c
ause 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 chemically-
treated 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.
Some dust created by
power sanding, sawing,
-4-
A
0
A
A
0
A
SM 2610929106 3-05 3/15/05 10:33 PM Page 5
Symbols
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
.../min Revolutions or reciprocation per minute Revolutions, strokes, surface speed,
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
No load speed Rotational speed, at no load
0
orbits etc. per minute
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
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 is listed by
Underwriters Laboratories,
and listed to Canadian
Standards by Underwriters
Laboratories.
This symbol
designates
that
this tool
complies
to NOM
Mexican
Standards.
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Functional Description and Specifications
!
WARNING
Disconnect the plug from the power source before making any
assembly, adjustments or changing accessories
measures reduce the risk of starting the tool accidentally.
Belt Sander
FIG. 1
AUXILIARY
HANDLE
. Such preventive safety
DUST
BAG
AUTO-TRACK
ADJUSTMENT
SCREW
AIR
VENTS
Model number 7313
Voltage rating
120 V 50 - 60Hz
Amperage rating 4.5 A
No load speed n
700/min
0
Belt size 3" x 18"
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ZIPPER
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Assembly
REMOVING AND INSTALLING
SANDING BELTS
!
WARNING
To prevent personal injury,
always disconnect the plug
from the power source before removing or
installing the belt.
TO REMOVE BELT
1. Place sander upside down and move lever in
direction of arrow to retract front pulley and
release belt tension (Fig. 2).
2. With the sander upside down and the open
side facing you, you can easily remove the belt.
TO INSTALL BELT
1. While the sander is still upside down with the
front pulley retracted and locked, insert the new
DIRECTION
OF TRAVEL
FIG. 2
REAR
PULLEY
belt around both pulleys and over the metal
plate. If belt has directional marks, be sure the
arrow on the inside of belt is pointing in the
direction of rotation as indicated on housing.
2. Then push lever back to its original position
to return tension to the belt.
ATTACHING AND REMOVING DUST BAG
Your tool is equipped with a dust bag (Fig. 1).
To install, slide the dust bag in direction of
arrow. The dust bag can be emptied by
removing the bag from the tool and opening the
zipper on the lower side of the bag. For most
efficient pick-up, empty bag frequently.
BELT TENSION
RELEASE LEVER
FRONT
PULLEY
METAL
PLATE
Operating Instructions
TRIGGER SWITCH AND “LOCK-ON”
Your tool can be turned “ON” or “OFF” by
squeezing or releasing the trigger. Your tool is
also equipped with “Lock-ON” button located
just above the trigger that allows continuous
operation without holding the trigger (Fig. 3).
TO LOCK SWITCH “ON”: Squeeze trigger,
depress button and release trigger.
TO UNLOCK THE SWITCH: Squeeze trigger
and release it without depressing the “LockON” button.
!
WARNING
the trigger cannot be released.
BUTTON
If the “Lock-ON” button is
continuously being depressed,
FIG. 3
ON/OFF
TRIGGER
-7-
“LOCK-ON”
BUTTON
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Your sander features the automatic belt control
AUTO-TRACK SYSTEM
s
ystem which keeps the belt running in the
c
enter of the pulleys after initial adjustment.
The system has been preset at the factory but
may require adjustment when belts are
changed or an older belt stretches.
ADJUSTING THE AUTO-TRACK SYSTEM
1. Plug in the cord with the tool OFF.
2. Hold handle of sander with one hand and tilt
FIG. 4
AUTO-TRACK
ADJUSTMENT
SCREW
SELECTING THE SANDING BELT
It is very important that you select the proper
belt for each particular application. To do this
you should understand the method of marking
or coding on the back of most belts. “CLOSED
COAT” means the surface is densely covered
with as much grit as the adhesive will hold.
“OPEN COAT” means the grit has been
3" x 18" BELTS AVAILABLE FROM SKIL
back until belt is off work and the sander is
resting on the bottom heel of the housing.
3. Turn tool ON by pressing the trigger.
4. For best performance the belt should be in
line with the outer edge of the rear pulley. If the
belt deviates more than 1/8 inch
from the outside of the sander, adjust the belt
position by turning the auto-track adjustment
screw, (Fig. 4) until the belt returns to the
proper position.
1/8"
MAXIMUM
applied evenly, but openly to the surface. An
“open coat” will not clog or fill as readily as
“closed coat”. In general, aluminum oxide
abrasive belts are best for woodworking
because they are tougher and last longer.
Sanding belts should be stored in a cool, dry
place. Do not store near heat or near a window
where the sun can reach them.
TYPE OF MATERIAL REMARKS GRIT SIZE
Coarse Medium Fine Very Fine
WOOD FINISHING:
New or unfinished
wood, plastics, resins.
NON-FERROUS
METALS: Such as lead,
copper, solder and
aluminum.
PAINT REMOVING:
For removing varnish,
lacquer and paint,
also for resinous or
green wood.
This is a “closed
coat” belt and has a
white colored
backing for
identification. The
abrasive used is
aluminum oxide.
Similar to above
belts but “open
coat”. Aluminum
oxide grits
are wider apart.
36
Grit
No.
73105
36
Grit
No.
73110
60
Grit
No.
73106
60
Grit
No.
73111
73107
2 Belts per package
-8-
80
Grit
No.
100 Grit
No.
73108
Grit
120
No.
73109
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Your sander has been designed to allow
FLUSH SANDING
c
onvenient flush sanding on the right side of the
sander.
Sanding Tips
Grasp the handles firmly. Start the sander with
the belt off the work (NOTE: never start or stop
the tool with the belt in contact with the work
surface). Place the heel of the sander on the
work first. Then, with a forward motion, begin
the sanding stroke as the machine is lowered
onto the work surface. This will prevent
gouging. Keep the sander moving so that your
work will be smooth and even. The stroke is
simply a back-and-forth movement with most of
the sanding done on the pull movement. Use a
light touch. The weight of the belt sander is the
only pressure required. Too much pressure will
slow the work by overloading the motor and
reducing belt speed. The result will be
decreased sanding efficiency. Sand slowly and
systematically and, when you stop, lift the
sander from the surface before stopping the
tool.
TECHNIQUE
Take care to select belts wisely. For initial
s
moothing of rough lumber, use coarse or very
coarse grit and sand with the grain. On very
uneven or hard wood, sand diagonally (across
the grain). Be careful to avoid gouging. Now
switch to medium grit belt and sand with the
grain. This will provide a relatively level and
smooth finish. Now insert a fine grit belt for final
finishing. Always sand with the grain to remove
scratches left by coarser belts. Keep the sander
moving in long, light strokes during finishing
operations. As a final touch, experienced
sanders will often insert a “used” fine belt to
provide a smooth surface for filling, sealing,
brushing or spraying.
Your belt sander will also help remove old
paint, varnish or lacquer; however, if the
coating consists of several layers, remove as
much as possible with a paint solvent or
varnish remover before using the belt sander.
Use a hand scraper to remove the residue left
by the solvent and allow surface to dry
completely before sanding.
WOOD FINISHING
REFINISHING COATED WOOD
GUIDE FOR WOOD SANDING OPERATION
SANDING
OPERATION
ROUGH
PREPARATORY
FINISH
PURPOSE ABRASIVE
To level out uneven
surfaces.
To smooth the
rough sanding
preparatory to finish
sanding.
The last sanding in
preparing the bare
wood for coating.
TO USE
Open Coat
Coarse Grit
Open Coat
Medium Grit
Open or
Closed Coat
Fine Grit
METHOD OF SANDING
Sanding diagonally to start
and finish up sanding
parallel with the grain.
Sanding parallel with the
wood grain.
Sanding parallel with the
wood grain.
Remove all sanding dust thoroughly before coating. Use a soft brush or a vacuum cleaner
and hose to remove all dust from seams or crevices.
For fast removal, start with a coarse grit, open
coat belt. Change to closed coat belts, using
medium grits as the material shows through the
coating. When the covering is thin, use medium
grit to avoid scratching the material. Use short,
light strokes, moving the sander rapidly.
Excessive pressure or steady sanding in one
place will burn the coating and load the belt.
METAL FINISHING
For ferrous metals such as steel, stainless
steel, iron, etc., use coarse grit open coat belts
or coarse to fine grit closed coat belts,
depending on the finish desired. Non-ferrous
metals such as aluminum, solder, brass,
bronze, etc., can also be sanded. Beeswax or
tallow are recommended as lubricants for metal
sanding, polishing or satin finishing to minimize
belt loading and to lengthen belt life. To use,
simply rub the lubricant on the belt from time to
time. SAE No. 10 or 20 lubricating oil can also
be used to assure a smooth scratch free
surface. Just wipe the oil on the surface prior to
sanding.
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SM 2610929106 3-05 3/15/05 10:33 PM Page 10
Maintenance
Service
!
WARNING
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.
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.
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.
After about 300-400 hours of operation, or at
every second brush change, the bearings should
Preventive maintenance
performed by unauthorized
TOOL LUBRICATION
CARBON BRUSHES
BEARINGS
Accessories
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
!
WARNING
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.
!
CAUTION
parts. Some of these are: gasoline, carbon
tetrachloride, chlorinated cleaning solvents,
ammonia and household detergents that contain
ammonia.
To avoid accidents always
disconnect the tool from the
Certain cleaning agents and
solvents damage plastic
!
WARNING
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.
(*= standard equipment)
(**= optional accessories)
RECOMMENDED SIZES OF EXTENSION CORDS
120 VOLT ALTERNATING CURRENT TOOLS
Tool’s
Ampere
Rating
3-6
6-8
8-10
10-12
12-16
Cord Size in A.W.G.
Cord Length in Feet Cord Length in Meters
25 50 100 150 15 30 60 120
16 14 0.75 .075 1.5 2.5
16
18
18 16 14 12
18
16 16 14 12 1.0 2.5 4.0 —
14
14 12 0.75 1.0 2.5 4.0
16
12 — — — — — —
Wire Sizes in mm
0.75 1.0 2.5 4.0
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2
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