Dewalt DW831 Instructional Manual

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into account the working conditions and the

work to be performed. Use of the power tool for

operations different from those intended could result

in a hazardoussituation.

5) Service

a ) Have your power tool serviced by a qualified

repair person using only identical replacement

parts. This will ensure that the safety of the power

tool ismaintained.

SAFETY INSTRUCTIONS FOR ALL

OPERATIONS

Safety Warnings Common for Grinding,

Sanding, Wire Brushing, Polishing

Operations

a ) This power tool is intended to function as a

grinder, sander, wire brush or polisher. Read all

safety warnings, instructions, illustrations and

specifications provided with this power tool.

Failure to follow all instructions listed below may

result in electric shock, fire and/or serious injury.

b ) Do not use accessories which are not specifically

designed and recommended by the tool

manufacturer. Just because the accessory can

be attached to your power tool, it does not assure

safeoperation.

c ) The rated speed of the accessory must be at least

equal to the maximum speed marked on the

power tool. Accessories running faster than their

rated speed can break and flyapart.

d ) The outside diameter and the thickness of your

accessory must be within the capacity rating of

your power tool. Incorrectly sized accessories cannot

be adequately guarded orcontrolled.

e ) Threaded mounting of accessories must match

the grinder spindle thread. For accessories

mounted by flanges, the arbor hole of the

accessory must fit the locating diameter of the

flange. Accessories that do not match the mounting

hardware of the power tool will run out of balance,

vibrate excessively and may cause loss ofcontrol.

f ) Do not use a damaged accessory. Before each

use inspect the accessory such as abrasive

wheels for chips and cracks, backing pad for

cracks, tear or excess wear, wire brush for loose

or cracked wires. If power tool or accessory

is dropped, inspect for damage or install an

undamaged accessory. After inspecting and

installing an accessory, position yourself and

bystanders away from the plane of the rotating

accessory and run the power tool at maximum

no-load speed for one minute. Damaged

accessories will normally break apart during this

testtime.

g ) Wear personal protective equipment. Depending

on application, use face shield, safety goggles or

safety glasses. As appropriate, wear dust mask,

hearing protectors, gloves and workshop apron

capable of stopping small abrasive or workpiece

fragments. The eye protection must be capable

of stopping flying debris generated by various

operations. The dust mask or respirator must

be capable of filtrating particles generated by

your operation. Prolonged exposure to high intensity

noise may cause hearingloss.

h ) Keep bystanders a safe distance away from work

area. Anyone entering the work area must wear

personal protective equipment. Fragments of

workpiece or of a broken accessory may fly away and

cause injury beyond immediate area ofoperation.

i ) Hold the power tool by insulated gripping

surfaces only, when performing an operation

where the cutting accessory may contact hidden

wiring or its own cord. Cutting accessory contacting

a “live” wire may make exposed metal parts of the

power tool “live” and could give the operator an

electricshock.

j ) Position the cord clear of the spinning accessory.

If you lose control, the cord may be cut or snagged

and your hand or arm may be pulled into the

spinningaccessory.

k ) Never lay the power tool down until the

accessory has come to a complete stop. The

spinning accessory may grab the surface and pull the

power tool out of yourcontrol.

l ) Do not run the power tool while carrying it at

your side. Accidental contact with the spinning

accessory could snag your clothing, pulling the

accessory into yourbody.

m ) Regularly clean the power tool’s air vents. The

motor’s fan will draw the dust inside the housing and

excessive accumulation of powdered metal may cause

electricalhazards.

n ) Do not operate the power tool near flammable

materials. Sparks could ignite thesematerials.

o ) Do not use accessories that require liquid

coolants. Using water or other liquid coolants may

result in electrocution orshock.

p ) Do not use Type 11 (flaring cup) wheels on this

tool. Using inappropriate accessories can result

ininjury.

q ) Always use side handle. Tighten the handle

securely. The side handle should always be used to

maintain control of the tool at alltimes.

r ) When starting the tool with a new or

replacement wheel, or a new or replacement

wire brush 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. If the wire

brush has loose wires, they will be detected.

Never start the tool with a person in line with the

wheel. This includes theoperator.

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Dewalt DW831 5 in. 125mm Medium Angle Grinder

Instructional Manual - Page 5