DeWalt DW887 Instruction Manual

D WALT Industrial Tool Co., 701 East Joppa Road, Baltimore, MD 21286
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Printed in U.S.A. (NOV02-CD-1) Form No.614861-00
The following are trademarks for one or more D
scheme; the "D" shaped air intake grill; the array of pyramids on the handgrip; the kit box con-
figuration; and the array of lozenge-shaped humps on the surface of the tool.

Important Safety Instructions

WARNING: When using electric tools, basic safety precautions should always be followed
to reduce risk of fire, electric shock, and personal injury, including the following:
READ ALL INSTRUCTIONS
Double Insulation
(DW887)
Double insulated tools are constructed throughout with two separate layers of electrical insulation
or one double thickness of insulation between you and the tool's electrical system. Tools built with
this insulation system are not intended to be grounded. As a result, your tool is equipped with a two
prong plug which permits you to use extension cords without concern for maintaining a ground con-
nection.
NOTE: Double insulation does not take the place of normal safety precautions when operating this
tool. The insulation system is for added protection against injury resulting from a possible electrical
insulation failure within the tool.
CAUTION: WHEN SERVICING USE ONLY IDENTICAL REPLACEMENT PARTS. Repair
or replace damaged cords.
Polarized Plugs
Polarized plugs (one blade is wider than the other) are used on equipment to reduce the risk
of electric shock. When provided, this plug will fit in the polarized outlet only one way. If the
plug does not fit fully into the outlet, reverse the plug. If it still does not fit, contact a qualified
electrician to install the proper outlet. Do not change the plug in any way.
Safety Instructions For All Tools
• KEEP WORK AREA CLEAN. Cluttered areas and benches invite injuries.
• CONSIDER WORK AREA ENVIRONMENT. Don't expose power tools to rain. Don't use
power tools in damp or wet locations. Keep work area well lit. Do not use tool in presence
of flammable liquids or gases.
• GUARD AGAINST ELECTRIC SHOCK. Prevent body contact with grounded surfaces. For
example; pipes, radiators, ranges, and refrigerator enclosures.
• KEEP CHILDREN AWAY. Do not let visitors contact tool or extension cord. All visitors
should be kept away from work area.
• STORE IDLE TOOLS. When not in use, tools should be stored in dry, and high or locked-
up place — out of reach of children.
•
DON'T FORCE TOOL. It will do the job better and safer at the rate for which it was intended.
• USE RIGHT TOOL. Don't force small tool or attachment to do the job of a heavy-duty tool. Don't
use tool for purpose not intended.
• DRESS PROPERLY. Do not wear loose clothing or jewelry. They can be caught in moving parts.
Rubber gloves and non-skid footwear are recommended when working outdoors. Wear protec-
tive hair covering to contain long hair. Air vents often cover moving parts and should also be
avoided.
• USE SAFETY GLASSES. Also use face or dust mask if operation is dusty.
• DON'T ABUSE CORD. Never carry tool by cord or yank it to disconnect from receptacle. Keep
cord from heat, oil, and sharp edges.
• SECURE WORK. Use clamps or a vise to hold work. It's safer than using your hand and it frees
both hands to operate tool.
• DON'T OVERREACH. Keep proper footing and balance at all times.
• MAINTAIN TOOLS WITH CARE. Keep tools sharp and clean for better and safer performance.
Follow instructions for lubricating and changing accessories. Inspect tool cords periodically and if
damaged, have repaired by authorized service facility. Inspect extension cords periodically and
replace if damaged. Keep handles dry, clean, and free from oil and grease.
• DISCONNECT OR LOCK OFF TOOLS when not in use, before servicing, and when changing
accessories, such as blades, bits, cutters.
• REMOVE ADJUSTING KEYS AND WRENCHES. Form habit of checking to see that keys and
adjusting wrenches are removed from tool before turning it on.
DW887 Copyright © 2002
WALT power tools: the yellow and black color
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• AVOID UNINTENTIONAL STARTING. Don't carry tool with finger on switch. Be sure switch is off
when plugging in.
• EXTENSION CORDS. Make sure your extension cord is in good condition. When using an exten-
sion cord, be sure to use one heavy enough to carry the current your product will draw. An under-
sized cord will cause a drop in line voltage resulting in loss of power and overheating. The fol-
lowing table shows the correct size to use depending on cord length and nameplate ampere rat-
ing. If in doubt, use the next heavier gage. The smaller the gage number, the heavier the cord.
Recommended Minimum Wire Size for Extension Cords
Total Length of Cord
25 ft. 50 ft. 75 ft. 100 ft.
7.6 m 15.2 m 22.9 m 30.5 m
Wire Size
18 AWG 18 AWG 16 AWG 16 AWG 14 AWG 14 AWG 12 AWG
• OUTDOOR USE EXTENSION CORDS. When tool is used outdoors, use only extension cords
intended for use outdoors and so marked.
• STAY ALERT. Watch what you are doing. Use common sense. Do not operate tool when you are
tired.
• CHECK DAMAGED PARTS. Before further use of the tool, a guard or other part that is damaged
should be carefully checked to determine that it will operate properly and perform its intended
function. Check for alignment of moving parts, binding of moving parts, breakage of parts, mount-
ing, and any other conditions that may affect its operation. A guard or other part that is damaged
should be properly repaired or replaced by an authorized service center unless otherwise indi-
cated elsewhere in this instruction manual. Have defective switches replaced by authorized ser-
vice center. Do not use tool if switch does not turn it on and off.

Additional Safety Instructions for Grinders

• ALWAYS WEAR EYE PROTECTION.
• KEEP GUARDS IN PLACE.
• Use only grinding wheels having a maximum operating speed at least high as "No Load
RPM" marked on the tool's nameplate.
• Before using, inspect recommended accessory for cracks or flaws. If such a crack or flaw
is evident, discard the accessory. The accessory should also be inspected whenever you think
the tool may have been dropped.
• When starting the tool (with a new or replacement wheel installed) hold the tool in a well
protected area and let it run for one minute. If the wheel has an undetected crack or flaw, it
should burst in less than one minute. Never start the tool with a person in line with the wheel. This
includes the operator.
• In operation, avoid bouncing the wheel or giving it rough treatment. If this occurs, stop the
tool and inspect the wheel.
• ALWAYS USE GUARDS with depressed center wheels or flaring cup grinding wheels.
• Clean your tool out periodically.
CAUTION: Wear appropriate hearing protection during use. Under some conditions and
duration of use, noise from this product may contribute to hearing loss.
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 (CCA).
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.
• 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 absorp-
tion of harmful chemicals.
SAVE THESE INSTRUCTIONS
Motor
Your D WALT tool is powered by a D WALT built motor. Be sure your power supply agrees with
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the nameplate marking. Voltage decrease of more than 10% will cause loss of power and
overheating. All D WALT tools are factory tested; if this tool does not operate, check the power
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supply.
Trigger Switch (Fig. 1)
Depressing the trigger switch turns the tool on. Releasing it turns the tool off. To lock the
switch on, depress the trigger fully, press and hold in the locking button, and release the trig-
ger switch. Release the locking button and tool will stay on. To turn turn the tool off, depress
and release the trigger switch.
Operation
To install grinding wheels:
1. TURN OFF TOOL AND DISCONNECT FROM POWER SUPPLY.
2. Remove or unlatch and pivot away wheel guard cover.
3. Remove mounting nut by turning it counterclockwise (when facing outer side of wheel). The
spindle can be held stationary by :
a. inserting and holding a suitable pin in one of the holes provided in the spindle collar, next to the
inward side of the wheel (5" and 6" straight grinders).
b. holding a wrench on the flats provided on the exposed portion of the spindle (2 1/2" straight
grinder).
4. When installing the new grinding wheel, always use blotters between the wheel and each sur-
face it contacts (all grinders). For 5" and 6" straight grinders, use the clamp washers, supplied
with tool, on either side of the grinding wheel.
5. Only tighten arbor nut sufficiently to drive the wheel without slippage.
6. Be sure to replace guard end cover.
7. When starting the tool (with a new or replacement wheel installed) hold the tool in a well pro-
tected 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.
CAUTION: Grasp tool firmly with both hands before starting tool.
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 (Figure 3), unless you have a spe-
cial wheel specifically make to permit grinding on the side of the wheel.
Cleaning
Blowing dust and grit out of the motor housing using compressed air is a necessary regular
maintenance procedure. Dust and grit containing particles from metal filing often accumulate
on interior surfaces and could create an electrical shock hazard if not frequently cleaned out.
CAUTION: Never use solvents or other harsh chemicals for cleaning the non-metallic
parts of the tool. Use clean, dry cloth only.
Lubrication
D WALT tools are properly lubricated at the factory and are ready for use. Tools should be
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relubricated every sixty days to six months depending on usage. Tools constantly used on pro-
duction or heavy-duty jobs and tools exposed to heat may require more frequent lubrication.
This lubrication should only be performed by D
Motor Brushes
(For tools with external brush caps)
Be sure tool is unplugged before inspecting brushes. Carbon brushes should be regularly
inspected for wear. To inspect brushes, 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.
125 ft. 150 ft. 175 ft.
38.1 m 45.7 m 53.3 m
WALT repair technicians.
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