
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.
h) Do not use a damaged accessory. Before each use inspect the accessories such as abrasive wheels
for chips and cracks, backing pads for cracks, tear or excess wear, wire brushes 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.
i) Wear personal protective equipment. Depending on the application, use face shield, safety
goggles or safety glasses. As appropriate, wear a dust mask, hearing protectors, gloves and a
workshop apron capable of stop‐ping 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 filtering particles generated by your operation. Prolonged exposure to
high intensity noise may cause hearing loss.
j) 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.
k) Position the cord clear of the spinning accessory. If you lose control of the power tool, the cord may
be cut or snagged and your hand or arm may be pulled into the spinning accessory.
l) 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.
m) Do not operate the electromechanical tools near flammable materials. Do not operate the power
tools when it is placed on a flammable surface such as wood. Sparks could ignite these materials.
n) 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, backing pad, 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 at the point of
the binding.
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.
a) Maintain a firm grip on the power tool and position your body and arm to allow you to resist
kickback forces. Always use an auxiliary handle, if provided, for maximum control over kickback or
torque reaction during start‐up. The operator can control torque reactions or kick-back forces, if
proper precautions are taken.
b) Do not position your body in line with and behind the rotating wheel. When the wheel, at the
point of operation, is moving away from your body, the possible kickback may propel the spinning
wheel and the power tool directly at you.
c) The chain saw carving wheel, the diamond wheel with segments whose circumferential gap
between the segments is greater than 10 mm or the saw blade with teeth must not be attached to
the tool. These wheels often cause kickback and loss of control.
d) Do not “jam” the cut‐off wheel or apply excessive pressure. Do not attempt to make an excessive
depth of cut. Overstressing the wheel increases the loading and susceptibility to twisting or binding
of the wheel in the cut and the possibility of kickback or wheel breakage.