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ROTARY TOOL SAFETY WARNINGS
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.
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.
Hold power tool by insulated gripping surfaces only,
when performing an operation where the cutting
accessory may contact hidden wiring. Cutting accessory
contacting a "live" wire may make exposed metal parts of
the power tool "live" and could give the operator an electric
shock.
Always hold the tool firmly in your hand(s) during the
start-up. The reaction torque of the motor, as it accelerates
to full speed, can cause the tool to twist.
Use clamps to support workpiece whenever practical.
Never hold a small workpiece in 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
toward you.
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.
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.
After changing the bits or making any 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 thrown.
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.
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.
Do not operate the power tool near flammable materials.
Sparks could ignite these materials.
Do not use accessories that require liquid coolants. Using
water or other liquid coolants may result in electrocution or
shock.
KICKBACK AND RELATED WARNINGS
Kickback is a sudden reaction to a pinched or snagged rotating
wheel, sanding band, brush or any other accessory. Pinching or
snagging causes rapid stalling of the rotating accessory which
in turn causes the uncontrolled power tool to be forced in the
direction opposite of the accessory's rotation.
For example, if an abrasive wheel is snagged or pinched by the
workpiece, the edge of the wheel that is entering into the pinch
point can dig into the surface of the material causing the wheel
to climb out or kick out. The wheel may either jump toward or
away from the operator, depending on direction of the wheel's
movement at the point of pinching. Abrasive wheels may also
break under these conditions.
Kickback is the result of power tool misuse and/or incorrect
operating procedures or conditions and can be avoided by
taking proper precautions as given below.
Maintain a firm grip on the power tool and position your
body and arm to allow you to resist kickback forces. The
operator can control torque reactions or kickback forces, if
proper precautions are taken.
Use special care when working corners, sharp edges,
etc. Avoid bouncing and snagging the accessory.
Corners, sharp edges or bouncing have a tendency to snag
the rotating accessory and cause loss of control or kickback.
Do not attach a toothed saw blade. Such blades create
frequent kickback and loss of control.
Always feed the bit into the material in the same direction
as the cutting edge is exiting from the material (which is
the same direction as the chips are thrown). Feeding the
tool in the wrong direction causes the cutting edge of the
bit to climb out of the work and pull the tool in the direction
of this feed.
When using rotary files, cut-off wheels, high-speed
cutters or tungsten carbide cutters, always have the
work securely clamped. These wheels will grab if they
become slightly canted in the groove, and can kickback.
When a cut-off wheel grabs, the wheel itself usually breaks.
When a rotary file, high-speed cutter or tungsten carbide
cutter grabs, it may jump from the groove and you could
lose control of the tool.
SAFETY WARNINGS SPECIFIC FOR
GRINDING AND ABRASIVE CUTTING-OFF
OPERATIONS:
Use only wheel types that are recommended for your power
tool and only for recommended applications. For example:
do not grind with the side of a cut-off wheel. Abrasive cut-off
wheels are intended for peripheral grinding, side forces applied
to these wheels may cause them to shatter.
For threaded abrasive cones and plugs use only
undamaged wheel mandrels with an unrelieved shoulder
flange that are of correct size and length. Proper mandrels
will reduce the possibility of breakage.
Do not "jam" a cut-off wheel or apply excessive
pressure. Do not attempt to make an excessive depth
of cut. Overstressing the wheel increases the loading and
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