Porter-Cable 7408 User manual

Double Insulated
Disc Grinder
Instruction
manual
The Model and Serial No. plate is located on the main
housing of the tool. Record these numbers in the
spaces below and retain for future reference.
Model No. ______________________________________
Type ___________________________________________
Serial No. _______________________________________
IMPORTANT
Please make certain that the person who is
to use this equipment carefully reads and
understands these instructions before
starting operations.
Part No. 901397 (019)
MODEL
7408
ESPAÑOL: PÁGINA 13
FRANÇAISE : PAGE 25
To learn more about Porter-Cable
visit our website at:
http://www.porter-cable.com
Copyright © 2001 PORTER-CABLE Corporation
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GENERAL 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.
WARNING: 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 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.
SAVE THESE INSTRUCTIONS.
WORK AREA
1. Keep your work area clean and well lit. Cluttered benches and dark
areas invite accidents.
2. 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.
3. Keep bystanders, children, and visitors away while operating a
power tool. Distractions can cause you to lose control.
ELECTRICAL SAFETY
1. 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.
2. 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.
3. Don’t expose power tools to rain or wet conditions. Water entering a
power tool will increase the risk of electric shock.
4. 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.
5. 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.
PERSONAL SAFETY
1. 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.
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2. 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.
3. 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.
4. 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.
5. Do not overreach. Keep proper footing and balance at all times.
Proper footing and balance enable better control of the tool in unexpected
situations.
6. Use safety equipment. Always wear eye protection. Dust mask, non-
skid safety shoes, hard hat, or hearing protection must be used for
appropriate conditions.
TOOLS USE AND CARE
1. 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.
2. Do not force tool. Use the correct tool for your application. The
correct tool will do the job better and safer at the rate for which it is
designed.
3. Do not use tool if switch does not turn it ON or OFF. A tool that
cannot be controlled with the switch is dangerous and must be repaired.
4. 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.
5. Store idle tools out of reach of children and other untrained
persons. Tools are dangerous in the hands of untrained users.
6. 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.
7. Check for misalignment or binding of moving parts, breakage of
parts, and any other condition that may affect the tool’s operation. If
damaged, have the tool serviced before using. Many accidents are
caused by poorly maintained tools.
8. 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
1. Tool service must be performed only by qualified repair personnel.
Service or maintenance performed by unqualified personnel may result in a
risk of injury.
2. 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.
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SPECIFIC SAFETY RULES AND SYMBOLS
1. ALWAYS USE PROPER GUARD WITH GRINDING WHEEL. A guard
protects operator from broken wheel fragments.
2. ACCESSORIES MUST BE RATED FOR AT LEAST THE SPEED
RECOMMENDED ON THE TOOL WARNING LABEL. Wheels and other
accessories running over rated speed can fly apart and cause injury.
3. HOLD TOOL BY INSULATED GRIPPING SURFACES WHEN
PERFORMING AN OPERATION WHERE THE CUTTING TOOL MAY
CONTACT HIDDEN WIRING OR ITS OWN CORD. Contact with a “live”
wire will also make exposed metal parts of the tool “live” and shock the
operator.
4. ALWAYS USE AN APPROVED GUARD with those accessories that
require a guard (see ACCESSORIES Section of this manual).
5. USE PROPER SAFETY EQUIPMENT. Wear safety goggles to protect
your eyes and wear a protective mask to minimize breathing in the fine dust
created while sanding. NOTE: Some wood contains preservatives which can
be toxic. Take extra care to prevent inhalation and skin contact when
working with these materials.
6. SANDING OF LEAD-BASED PAINT IS NOT RECOMMENDED. Lead-
based paint should only be removed by a professional.
7. DO NOT INSTALL WOODCARVING BLADE on this grinder.
8. WARNING: There are certain applications for which this tool was
designed. Porter-Cable strongly recommends that this tool NOT be modified
and/or used for any application other than for which it was designed. If you
have any questions relative to its application DO NOT use the tool until you
have written Porter-Cable and we have advised you.
Technical Service Manager
Porter-Cable Corporation
4825 Highway 45 North
Jackson, TN 38305
SYMBOL DEFINITION
V .......................... volts
A .......................... amperes
Hz .......................... hertz
W .......................... watts
kW .......................... kilowatts
µF .......................... microfarads
l .......................... liters
kg .......................... kilograms
N/cm2.......................... newtons per square centimeter
Pa .......................... pascals
h .......................... hours
min .......................... minutes
s .......................... seconds
.......................... alternating current
3 .......................... three-phase alternating current
3N.......................... three-phase alternating current with neutral
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______
– – – – .......................... direct current
n0.......................... no load
.......................... alternating or direct current
.......................... Class II Construction
.......................... splash-proof construction
.......................... watertight construction
…/min .......................... revolutions or reciprocation per minute
ADDITIONAL SAFETY RULES FOR PAINT REMOVAL
WARNING: Extreme care should be taken when removing paint.
The peelings, residue, and vapors of paint may contain lead, which
is poisonous. Exposure to even low levels of lead can cause
irreversible brain and nervous system damage; young and unborn
children are particularly vulnerable.
Before beginning any paint removal process you should determine whether
the paint you are removing contains lead. This can be done by your local
health department or by a professional who uses a paint analyzer to check for
lead.
LEAD-BASED PAINT SHOULD ONLY BE REMOVED BY A
PROFESSIONAL.
Persons removing paint should follow these guidelines:
1. KEEP THE WORK AREA WELL VENTILATED. Open the windows and
put an exhaust fan in one of them. Be sure the fan is moving air from inside
to outside.
2. REMOVE OR COVER any carpets, rugs, furniture, clothing, cooking
utensils and air ducts.
3. PLACE DROP CLOTHS in the work area to catch any paint chips or
peelings. Wear protective clothing such as extra work shirts, overalls and hats.
4. WORK IN ONE ROOM AT A TIME. Furnishings should be removed or
placed in the center of the room and covered. Work areas should be sealed
off from the rest of the dwelling by sealing doorways with drop cloths.
5. CHILDREN, PREGNANT OR POTENTIALLY PREGNANT women and
nursing mothers should not be present in the work area until the work is
done and all cleanup is complete.
6. WEAR A DUST RESPIRATOR or a dual filter (dust and fume) respirator
mask which has been approved by the Occupational Safety and Health
Administration (OSHA), the National Institute of Safety and Health (NIOSH),
or the United States Bureau of Mines. These masks and replaceable filters
are readily available at major hardware stores. Be sure the mask fits. Beards
and facial hair may keep the masks from sealing properly. Change filters
often. DISPOSABLE PAPER MASKS ARE NOT ADEQUATE.
7. KEEP FOOD AND DRINK out of the work area. Wash hands, arms, and
face and rinse mouth before eating or drinking. Do not smoke or chew gum
or tobacco in the work area.
8. CLEAN UP ALL REMOVED PAINT and dust by wet mopping the floors.
Use a wet cloth to clean all walls, sills and any other surfaces where paint or
dust is clinging. DO NOT SWEEP, DRY DUST OR VACUUM. Use a high
phosphate detergent or trisodium (TSP) to wash and mop areas.
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9. AT THE END OF EACH WORK SESSION put the paint chips and debris
in a double plastic bag, close it with tape or twist ties and dispose of properly.
10. REMOVE PROTECTIVE CLOTHING and work shoes in the work area to
avoid carrying dust into the rest of the dwelling. Wash work clothes
separately. Wipe shoes off with a wet rag that is then washed with the work
clothes. Wash hair and body thoroughly with soap and water.
REPLACEMENT PARTS
When servicing, use only identical replacement parts.
MOTOR
Many Porter-Cable tools will operate on either D.C., or single phase 25 to 60
cycle A.C. current and voltage within plus or minus 5 percent of that shown
on the specification plate on the tool. Several models, however, are designed
for A.C. current only. Refer to the specification plate on your tool for proper
voltage and current rating.
CAUTION: Do not operate your tool on a current on which the
voltage is not within correct limits. Do not operate tools rated A.C.
only on D.C. current. To do so may seriously damage the tool.
EXTENSION CORD SELECTION
If an extension cord is used, make sure the conductor size is large enough to
prevent excessive voltage drop which will cause loss of power and possible
motor damage. A table of recommended extension cord sizes will be found
in this section. This table is based on limiting line voltage drop to 5 volts (10
volts for 230 volts) at 150% of rated amperes.
If an extension cord is to be used outdoors it must be marked with the suffix
W-A or W following the cord type designation. For example – SJTW-A to
indicate it is acceptable for outdoor use.
RECOMMENDED EXTENSION CORD SIZES FOR USE WITH PORTABLE ELECTRIC TOOLS
FUNCTIONAL DESCRIPTION
FOREWORD
Porter-Cable disc grinders are designed for numerous grinding operations.
Typical applications are auto body grinding, smoothing welding beads,
removing gates and flash from castings, removing rust and the like.
Length of Cord in Feet
115V 25 Ft. 50 Ft. 100 Ft. 150 Ft. 200 Ft. 250 Ft. 300 Ft. 400 Ft. 500 Ft.
230V 50 Ft. 100 Ft. 200 Ft. 300 Ft. 400 Ft. 500 Ft. 600 Ft. 800 Ft. 1000 Ft.
0-2181818161614141212
2-3181816141412121010
3-418181614121210108
4-5 18 18 14 12 12 10 10 8 8
5-6 18 16 14 12 10 10 8 8 6
6-8 18 16 12 10 10 8 6 6 6
8-10 18 14 12 10 8 8 6 6 4
10-12 16 14 10 8 8 6 6 4 4
12-14 16 12 10 8 6 6 6 4 2
14-16 16 12 10 8 6 6 4 4 2
16-18 14 12 8 8 6 4 4 2 2
18-20 14 12 8 6 6 4 4 2 2
Nameplate Ampere Rating
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TO START AND STOP THE MACHINE
CAUTION: Make sure switch is OFF and power circuit voltage is the
same as that shown on the specification plate.
1. Connect machine to power circuit.
2. Slide the switch button (A), Fig. 1,
forward to turn tool “ON”. When
released, the switch will return to the
“OFF” position.
3. To lock the switch in the “ON”
position: with the switch “ON”, press
the front end of the switch button (A)
Fig. 1, in toward the tool housing. To
release the switch lock: press the back
end of the switch button in toward the
tool housing.
ASSEMBLY
TO INSTALL AUXILIARY HANDLE
An auxiliary handle (H) Fig. 2 is
furnished with your machine and can
be installed on either side of the front
housing or on top (B) Fig. 2. This
handle SHOULD BE USED AT ALL
TIMES to maintain complete control
of the machine.
TO INSTALL WHEEL GUARD
A TYPE 27 wheel guard is furnished with the machine. A TYPE 1 wheel guard
is available as an accessory. Both guards are installed and adjusted in the
same manner.
WARNING: Always use an approved, and properly adjusted wheel
guard where required (see ACCESSORIES Section of this manual).
1. CAUTION: DISCONNECT TOOL FROM POWER CIRCUIT.
2. Rest machine on its back with spindle facing up.
3. Seat guard onto mounting flange.
Rotate the guard to a position that will
place the guard between the operator
and the grinding wheel (or other
accessory requiring a guard). Tighten
clamp screw (A) Fig. 3, to secure the
guard in proper position (see Fig. 4).
WARNING: Always make sure the
wheel guard is positioned between
operator and the wheel, so that
flying chips or pieces of a wheel
that might break will be deflected
away from the operator (see Fig. 4).
Fig. 2
H
Fig. 1
A
Fig. 3
A
B
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TO INSTALL GRINDING WHEEL
1. CAUTION: DISCONNECT TOOL FROM POWER CIRCUIT.
2. Rest machine on its back with spindle facing up.
3. Install and adjust the appropriate wheel guard following instructions in
TO INSTALL WHEEL GUARD Section of this manual.
4. Position inner flange (A) Fig. 5, onto spindle (C), with round hub facing
outward, away from machine. Rotate flange until it drops into place on the
spindle.
CAUTION: Use Type 1 Wheel Guard when using Type 1 Wheels.
5. Position grinding wheel to spindle.
6. Position outer flange to spindle with flat side against wheel, Fig. 6, and
thread into place hand tight.
7. Depress spindle lock pin (E) Fig. 7, and hold while rotating grinding
wheel clockwise by hand until spindle lock engages.
8. Continue holding spindle lock pin engaged while placing lugs of spanner
wrench (F) Fig. 7, into holes of outer flange. Tighten securely by turning
clockwise.
OPERATION
USING A DISC GRINDER
Be certain wheel guard and auxiliary handle are installed.
Firmly grip the auxiliary handle and motor housing as shown in Fig. 8. Lift up
rear of motor housing so only the front section of grinding wheel contacts the
work. Use light pressure. Always lift the grinder off work before starting or
stopping motor. The arrow on the front gear housing indicates the direction
in which the grinding wheel rotates.
Fig. 5
C
Fig. 6 Fig. 7
E
Fig. 4
F
A
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MAINTENANCE
KEEP TOOL CLEAN
Periodically blow out all air passages with dry compressed air. All plastic
parts should be cleaned with a soft damp cloth. NEVER use solvents to clean
plastic parts. They could possibly dissolve or otherwise damage the material.
CAUTION: Wear safety glasses while using compressed air.
FAILURE TO START
Should your tool fail to start, check to make sure the prongs on the cord plug
are making good contact in the outlet. Also, check for blown fuses or open
circuit breakers in the line.
LUBRICATION
This tool has been lubricated with a sufficient amount of high grade lubricant
for the life of the unit under normal operating conditions. No further
lubrication is necessary.
BRUSH INSPECTION AND LUBRICATION
For your continued safety and electrical protection, brush inspection and
replacement on this tool should ONLY be performed by an AUTHORIZED
PORTER-CABLE SERVICE STATION or a PORTER-CABLE/DELTA SERVICE
CENTER.
At approximately 100 hours of use, take or send your tool to your nearest
Authorized Porter-Cable Service Station to be thoroughly cleaned and
inspected; worn parts replaced, when necessary; relubricated with fresh
lubricant, if required; reassembled with new brushes; and performance tested.
Any loss of power before the above maintenance check may indicate the
need for immediate servicing of your tool. DO NOT CONTINUE TO OPERATE
TOOL UNDER THIS CONDITION. If proper operating voltage is present,
return your tool to the service station for immediate service.
Fig. 8
❂
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SERVICE AND REPAIRS
All quality tools will eventually require servicing or replacement of parts due
to wear from normal use. These operations, including brush inspection and
replacement, should ONLY be performed by either an AUTHORIZED
PORTER-CABLE SERVICE STATION or a PORTER-CABLE/DELTA SERVICE
CENTER. All repairs made by these agencies are fully guaranteed against
defective material and workmanship. We cannot guarantee repairs made or
attempted by anyone other than these agencies.
Should you have any questions about your tool, feel free to write us at any
time. In any communications, please give all information shown on the
nameplate of your tool (model number, type, serial number, etc.).
ACCESSORIES
A complete line of accessories is available from your Porter-Cable •
Delta Supplier, Porter-Cable • Delta Factory Service Centers, and
Porter-Cable Authorized Service Stations. Please visit our Web Site
www.porter-cable.com for a catalog or for the name of your nearest
supplier.
WARNING: Since accessories, other than those offered by Porter-Cable
•Delta, have not been tested with this product, use of such accessories
could be hazardous. For safest operation, only Porter-Cable • Delta
recommended accessories should be used with this product.
NOTE: The Model 7408 Grinder can be used with various grinder
accessories available from your industrial supplier. ALL ACCESSORIES
MUST BE RATED FOR 12,000 RPM (or higher), and MUST BE USED
WITH PORTER-CABLE GUARDS.
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