Hilti AG 500-A22, Operator'S Manual

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with a live wire, metal parts of the power tool can also become live, causing the operator to receive an
electric shock.
▶ Never lay the power tool down before the accessory tool has come to a complete stop. If the
rotating accessory tool were allowed to touch the surface on which you are going to place the power
tool, you could lose control of the power tool.
▶ Never start the power tool while carrying it around. Your clothing could be snagged by the rotating
accessory tool, pulling the accessory tool into your body.
▶ Clean the ventilation slots of the power tool at regular intervals. The motor’s fan draws dust into the
housing and a build-up of metallic dust can cause electrical hazards.
▶
Do not operate the power tool near flammable materials. Sparks could ignite these materials.
Kickback
WARNING! Snagging or jamming brings the rotating accessory tool to an abrupt stop. If this
happens the power tool whips round in the direction opposite to the accessory tool's direction of rotation,
the grinding disc can catch and break out or cause a kickback.
By adopting suitable precautionary measures the operator can control the kickback and reaction forces:
▶ Maintain a firm grip on the power tool and position your body and arms to absorb kickback forces.
▶ Always use the auxiliary handle, if provided, for maximum control over kickback forces or torque
reaction during start-up.
▶ Always keep your hand well clear of the rotating accessory tool. Kickback could cause the accessory
tool to pass across your hand.
▶
Keep your body clear of where the power tool will move if kickback occurs. Kickback will propel the
power tool in the direction opposite to the wheel’s direction of rotation at the point of snagging.
▶
Exercise special care when working at corners, sharp edges, etc. Avoid allowing the accessory
tool to bounce off or jam in the workpiece. The rotating accessory tool evinces a tendency to jam at
corners and sharp edges, or if it bounces off the workpiece. This causes loss of control or kickback.
▶
Do not attach a saw chain, woodcarving blade or toothed saw blade. Such blades create frequent
kickback and loss of control.
Safety instructions for grinding and abrasive cutting:
▶
Use only abrasive wheel types approved for your power tool and the specific guard designed for
the selected wheel. Wheels for which the power tool was not designed cannot be adequately guarded
and are unsafe.
▶
Offset grinding discs must be fitted in such a way that their grinding face does not project past
the plane of the guard edge. An incorrectly fitted grinding disc projecting past the plant of the guard
edge cannot be adequately shielded.
▶ The guard must be securely attached to the power tool and positioned for maximum safety, so
that the smallest possible segment of the abrasive disc is exposed toward the operator. The guard
helps protect the operator from flying fragments, accidental contact with the abrasive disc, and flying
sparks that could ignite clothing.
▶ Use abrasive discs for the recommended applications only.
▶ Never try to use the flat of an abrasive cut-off wheel for grinding. Abrasive cut-off wheels are
intended for peripheral grinding. Side forces applied to these wheels can cause them to shatter.
▶ Always use an undamaged clamping flange of the correct size and shape for your selected grinding
disc. The correct flange supports the grinding disc, reducing the risk of disc breakage. Flanges for
cut-off wheels can differ from those for other grinding discs.
▶ Do not use worn-down, originally larger-diameter grinding discs from larger power tools. Grinding
discs intended for a larger power tool are not suitable for the higher speed of a smaller tool and can
break.
Safety instructions for abrasive cutting:
▶
Do not "bind" 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.
▶
Keep clear of the areas in front of and behind the rotating cut-off 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.
▶ If the wheel binds or when you interrupt a cut for any reason, switch off the power tool and hold
the power tool motionless until the wheel comes to a complete stop. Never attempt to remove the
rotating cut off-wheel from the cut, because kickback can occur. Investigate and take corrective
action to eliminate the cause of wheel binding.
Printed: 26.01.2017 | Doc-Nr: PUB / 5292879 / 000 / 00 Printed: 26.01.2017 | Doc-Nr: PUB / 5292879 / 000 / 01