Operation; Maintenance - DeWalt DW887N Instruction Manual

Safety Warnings Specific for Wire Brushing Operations
a) Be aware that wire bristles are thrown by the brush even during ordinary operation.
Do not overstress the wires by applying excessive load to the brush. The wire bristles
can easily penetrate light clothing and/or skin.
b) If the use of a guard is recommended for wire brushing, do not allow any
interference of the wire wheel or brush with the guard. Wire wheel or brush may
expand in diameter due to work and centrifugal forces.
Additional Safety Information
• Do not use Type 11 (flaring cup) wheels on this tool. Using inappropriate accessories can
result in injury,
• Air vents often cover moving parts and should be avoided. Loose clothes, jewelry or long
hair can be caught in moving parts.
• An extension cord must have adequate wire size (AWG or American Wire Gauge) for
safety. The smaller the gauge number of the wire, the greater the capacity of the cable, that is
16 gauge has more capacity than 18 gauge. An undersized cord will cause a drop in line voltage
resulting in loss of power and overheating. When using more than one extension to make up
the total length, be sure each individual extension contains at least the minimum wire size. The
following table shows the correct size to use depending on cord length and nameplate ampere
rating. If in doubt, use the next heavier gauge. The smaller the gauge number, the heavier the
cord.
Ampere Rating
More
Than
0
6
10
12
Not More
Than
6
10
12
16
Minimum Gauge for Cord Sets
Volts Total Length of Cord in Feet (meters)
120V 25 (7.6) 50 (15.2) 100 (30.5) 150 (45.7)
240V 50 (15.2) 100 (30.5) 200 (61.0) 300
(91.4)
AWG
18
18
16
14
16
16
16
12
16 14
14 12
14 12
Not Recommended
_ WARNING: ALWAYS use safety glasses. Everyday eyeglasses are NOT safety glasses. Also use
face or dust mask if cutting operation is dusty, ALWAYS WEAR CERTIFIED SAFETY EQUIPMENT_
• ANSI Z87.1 eye protection (CAN/CSA Z94.3),
• ANSI $12.6 ($3. 19) hearing protection,
• NIOSH/OSHA/MSHA respiratory protection.
A WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other
construction activities contains chemicals known to the State of California 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. Toreduce
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.
• Avoid prolonged contact with dust from power sanding, sawing, grinding, drilling, and
other construction activities. Wear protective clothing and wash exposed areas with
soap and water. Allowing dust to get into your mouth, eyes, or lay on the skin may promote
absorption of harmful chemicals.
A WARNING: Use of this tool can generate and/or disperse dust, which may cause serious and
permanent respiratory or other injury, Always use NIOSH/OSHA approved respiratory protection
appropriate for the dust exposure. Direct particles away from face and body,
A WARNING: Always wear proper personal hearing protection that conforms to ANSI
$12.6 ($3.19) during use. Under some conditions and duration of use, noise from this product
may contribute to hearing loss.
A WARNING: Always use eye protection. All users and bystanders must wear eye protection
that conforms to ANSI Z87.1.
_ WARNING: When not in use, place grinder on a stable surface where it will not move
inadvertantly, roll or cause a tripping or falling hazard. Serious personal injury may result.
A CAUTION: To reduce the risk of personal injury, use extra care when working into a comer or
edge because a sudden, sharp movement of the tool may be experienced when the wheel or other
accessory contacts a secondary surface or a surface edge.
• The label on your tool may include the following symbols. The symbols and their definitions are
as follows."
V.................. volts
Hz ................ hertz
min .............. minutes
- --. .......... direct current
(_) ................ Class I Construction
(grounded)
[] ................ Class II Construction
(double insulated)
.../min ......... per minute
IPM .............. impacts per minute
A ................... amperes
W .................. watts
"_ ................ alternating current
................ alternating or direct current
no ................. no load speed
G .................. earthing terminal
_ .................. safety alert symbol
BPM .............. beats per minute
RPM .............. revolutions per minute
sfpm .............. surface feet per minute
SAVE THESE INSTRUCTIONS FOR FUTURE USE
Motor
Be sure your power supply agrees with the nameplate marking. Voltage decrease of more than 10%
will cause loss of power and overheating. All DEWALT tools are factory tested; if this tool does not
operate, check the power supply.
COMPONENTS (Fig. 1, 2)
WARNING: Never modify the power tool or any part of it. Damage or personal injury could result.
A. Paddle switch (DW887, DW887N)
B. Lock-on button (DW887, DW888)
C. Lock-off lever (DW887, DW887N)
D. Trigger switch (DW888)
INTENDED USE
The DW887, DW887N and DW888 heavy-duty die grinders have been designed for professional
grinding. DO NOT use under wet conditions or in presence of flammable liquids or gases.
These heavy-duty die grinders are professional power tools. DO NOT let children come into contact
with the tool. Supervision is required when inexperienced operators use this tool.
Switches
_ WARNING: Before connecting the tool to a power source depress and release the switch once
without depressing the lock-on button to ensure that the switch is off. Depress and release the
switch as described above after any interruption in power supply to the tool, such as the activation
of a ground fault interrupter, throwing of a circuit breaker, accidental unplugging, or power failure. If
the switch is locked on, the tool will start unexpectedly when it is reconnected.
_ WARNING: Grasp tool firmly with both hands to maintain control of the tool at start up and
during use and until the wheel or accessory stops rotating. Make sure the wheel has come to a
complete stop before laying the tool down.
_, WARNING: To reduce unexpected tool movement, do not switch the tool on or off while under
load conditions. Allow the grinder to run up to full speed before touching the work surface. Lift the
tool from the surface before turning the tool off.
PADDLE SWITCH - DW887, DW887N (FIG. 1)
The lock-off lever (C), located on the paddle switch, is a safety feature that prevents accidental
activation of the grinder.
To turn the tool on, push the lock-off lever (C) toward the back of the tool, then depress the paddle
switch (A). The tool will run while the switch is depressed. Turn the tool off by releasing the paddle
switch.
A WARNING: Do not disable the lock-off lever. If the lock-off lever is disabled, the tool may start
unexpectedly when it is laid down.
TRIGGER SWITCH - DW888 (FIG. 1, 2)
Depressing the trigger switch turns the tool on. Releasing it turns the tool off. To lock the switch on,
fully depress the trigger switch, press and hold in the lock-on button (B), release the trigger switch
and the lock-on button. The tool will now remain on. To turn turn the tool off, depress and release
the trigger switch.
Lock-on Button - DW887, DW888
The lock-on button offers increased comfort in extended use applications. To lock the tool on, push
the lock-off lever (C) then depress the paddle switch/trigger switch.
With the tool running, depress the lock-on button (B). The tool will continue to run after the paddle
switch is released.
To unlock the tool, depress and release the paddle switch/trigger switch. This will cause the tool
to stop.
A WARNING: Allow the tool to reach full speed before touching tool to the work surface. Lift the
tool from the work surface before turning the tool off.
OPERATION
A WARNING: To reduce the risk of serious personalinjury, turn tool off and disconnect tool
from power source before making any adjustments or removing/installing attachments
or accessories. Before reconnecting the tool, depress and release the trigger switch to
ensure that the tool is off.
Install Grinding Wheels
1 Remove mounting nut by turning it counterclockwise (when facing outer side of accesssory)
The spindle can be held stationary by holding a wrench on the flats provided on the exposed
portion of the spindle.
2. Only tighten nut sufficiently to drive the wheel without slippage.
3. When starting the tool (with a new or replacement wheel installed) hold the tool in a well
protected area. If the wheel has an undetected crack or flaw, it should burst in less than one
minute. Never start tool with a person in line with the wheel. This includes the operator.
FIG. 1
DW887
1-1/2" (38 mm) DIE GRINDER
MEULES _, RECTIFIER LES MATRICES DW887
DE 38 mm (1-1/2 pc)
ESMERILADORA DE TROQUEL DW887
DE 38 mm (1-1/2")
DW887N
1-1/2" (38 mm) DIE GRINDER
MEULES _, RECTIFIER LES MATRICES DW887
DE 38 mm (1-1/2 pc)
ESMERILADORA DE TROQUEL DW887
DE 38 mm (1-1/2")
FIG. 2
DW888 2" (50 mm) DIE GRINDER
MEULES _, RECTIFIER LES MATRICES DW888 DE 50 mm (2 pc)
ESMERILADORA DE TROQUEL DW888 DE 50 mm (2")
FIG. 3 FIG. 4
A WARNING: Grasp tool firmly with both hands to maintain control of the tool at start up and
during use and until the wheel or accessory stops rotating. Make sure the wheel has come to a
complete stop before laying the tool down.
Put the work in a vise or clamp it securely. Use a face mask over the nose and mouth if the
operation raises dust. Treat the wheel with respect, do not jam the wheel into the work or use
unnecessary pressure. Grind only on the face of the wheel (Fig. 3), unless you have a special wheel
specifically make to permit grinding on the side of the wheel.
Precautions To Take When Sanding Paint
1 Sanding of lead based paint is NOT RECOMMENDED due to the difficulty of controlling the
contaminated dust. The greatest danger of lead poisoning is to children and pregnant women.
2. Since it is difficult to identify whether or not a paint contains lead without a chemical analysis,
we recommend the following precautions when sanding any paint:
PERSONAL SAFETY
1. No children or pregnant women should enter the work area where the paint sanding is being
done until all clean up is completed.
2. A dust mask or respirator should be worn by all persons entering the work area. The filter
should be replaced daily or whenever the wearer has difficulty breathing.
NOTE: Only those dust masks suitable for working with lead paint dust and fumes should be
used. Ordinary painting masks do not offer this protection. See your local hardware dealer for
the proper N.I.O.S.H. approved mask.
3. NO EATING, DRINKING or SMOKING should be done in the work area to prevent ingesting
contaminated paint particles. Workers should wash and clean up BEFORE eating, drinking or
smoking. Articles of food, drink, or smoking should not be left in the work area where dust
would settle on them.
ENVIRON M ENTAL SAFETY
1. Paint should be removed in such a manner as to minimize the amount of dust generated.
2. Areas where paint removal is occurring should be sealed with plastic sheeting of 4 mils
thickness.
3. Sanding should be done in a manner to reduce tracking of paint dust outside the work area.
CLEANING AND DISPOSAL
1. All surfaces in the work area should be vacuumed and thoroughly cleaned daily for the duration
of the sanding project. Vacuum filter bags should be changed frequently.
2. Plastic drop cloths should be gathered up and disposed of along with any dust chips or other
removal debris. They should be placed in sealed refuse receptacles and disposed of through
regular trash pick-up procedures.
During clean up, children and pregnant women should be kept away from the immediate work
area.
3. All toys, washable furniture and utensils used by children should be washed thoroughly before
being used again.
MAINTENANCE
A WARNING: To reduce the risk of serious personalinjury, turn tool off and disconnect tool
from power source before making any adjustments or removing/installing attachments
or accessories. Before reconnecting the tool, depress and release the trigger switch to
ensure that the tool is off.
Cleaning
WARNING: Blowing dust and grit out of motor and switch actuator using clean, dry compressed
air is a necessary regular maintenance procedure. Dust and grit containing metal particles often
accumulate on interior surfaces and could create an electrical shock or electrocution if not
frequently cleaned out. It is recommended that a ground fault circuit interrupter (GFCI) is utilized to
further protect the user from electric shock resulting from the accumulation of conductive particles.
If the tool is deactivated by the GFCI, unplug the tool and check and clean the tool before resetting
the GFCI. ALWAYS WEAR SAFETY GLASSES (ANSI Z87.1) when cleaning or using this tool
A WARNING: Never use solvents or other harsh chemicals for cleaning the non-metallic parts
of the tool These chemicals may weaken the plastic materials used in these parts. Use a cloth
dampened only with water and mild soap. Never let any liquid get inside the tool," never immerse
any part of the tool into a liquid.
Lubrication
Your power tool requires no additional lubrication.
Motor Brushes
DW887, DW887N
Please contact your local service center to inspect brushes.
DW888
Be sure tool is unplugged before inspecting brushes. Carbon brushes should be regularly inspected
for wear. To inspect brushes on the DW888, unscrew the plastic brush inspection caps (located in
the sides of the motor housing) and the spring and brush assemblies may be withdrawn from the
tool. Keep brushes clean and sliding freely in their guides. Carbon brushes have varying symbols
stamped into them, and if the brush is worn down to the line closest to the spring, they must be
replaced. New brush assemblies are available at your local service center.
Accessories
A WARNING: Since accessories, other than those offered by DEWALT,have not been tested with
this product, use of such accessories with this tool could be hazardous. To reduce the risk of injury,
only DEWALT,recommended accessories should be used with this product.
Recommended accessories for use with your tool are available at extra cost from your local dealer or
authorized service center. If you need assistance in locating any accessory, please contact DEWALT
Industrial Tool Co., 701 East Joppa Road, Baltimore, MD 21286, call 1-800-4-DEWALT (1-800-433-
9258) or visit our website www.dewalt.com.
A WARNING: To reduce the risk of injury, ALWAYS use proper guards when grinding and wear
eye protection.
ACCESSORY FOR DIE GRINDERS
Mounted Stones and Points
Repairs
To assure product SAFETY and RELIABILITY, repairs, maintenance and adjustments (including brush
inspection and replacement) should be performed by a DEWALTfactory service center, a DEWALT
authorized service center or other qualified service personnel. Always use identical replacement
parts.