Dremel 4300 Operating/Safety Instructions Manual page 4

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Safety Rules for Rotary Tools - (cont.)
Mandrel mounted wheels, sanding drums,
cutters or other accessories must be fully
inserted into the collet or chuck. If the
mandrel is insufficiently held and/or the
overhang of the wheel is too long, the mounted
wheel may become loose and be ejected at
Do not use a damaged accessory. Before
high velocity.
each use inspect the accessory such as
abrasive wheels for chips and cracks,
sanding drum 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
Wear personal protective equipment.
during this test time.
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
Keep bystanders a safe distance away from
cause hearing loss.
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
Hold the power tool by insulated gripping
beyond immediate area of operation.
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
Always hold the tool firmly in your hand(s)
shock.
during the start-up. The reaction torque of the
motor, as it accelerates to full speed, can cause
Use clamps to support workpiece whenever
the tool to twist.
practical. Never hold a small workpiece in
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one hand and the tool in the other hand
while in use. Clamping a small workpiece
allows you to use your hand(s) to control the
tool. Round material such as dowel rods, pipes
or tubing have a tendency to roll while being
cut, and may cause the bit to bind or jump
Position the cord clear of the spinning
toward you.
accessory. If you lose control, the cord may be
cut or snagged and your hand or arm may be
Never lay the power tool down until the
pulled into the spinning accessory.
accessory has come to a complete stop.
The spinning accessory may grab the surface
After changing the bits or making any
and pull the power tool out of your control.
adjustments, make sure the collet nut,
chuck or any other adjustment devices are
securely tightened. Loose adjustment devices
can unexpectedly shift, causing loss of control,
loose rotating components will be violently
Do not run the power tool while carrying it
thrown.
at your side. Accidental contact with the
spinning accessory could snag your clothing,
Regularly clean the power tool's air vents.
pulling the accessory into your body.
The motor's fan will draw the dust inside the
housing and excessive accumulation of
Do not operate the power tool near
powdered metal may cause electrical hazards.
flammable materials. Sparks could ignite
Do not use accessories that require liquid
these materials.
coolants. Using water or other liquid coolants
Use only in well-ventilated area. Working in a
may result in electrocution or shock.
Allow for sufficient space, at least 6",
safe environment reduces risk of injury.
between your hand and the spinning bit. Do
not reach in the area of the spinning bit. The
proximity of the spinning bit to your hand may
Do not touch the bit or collet after use. After
not always be obvious.
use the bit and collet are too hot to be touched
Do not alter or misuse tool. Any alteration or
by bare hands.
modification is a misuse and may result in
This product is not intended for use as a
serious personal injury.
dental drill, in human or veterinary medical
applications. Serious injury may result.
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