Hilti AG 100-7 D, Operation Manual

Page: 6 / 24

4 English
machining operations. The dust mask or respirator must be capable of filtering out dust particles resulting
from use of the power tool. Prolonged exposure to high-intensity noise can cause hearing loss.
▶
Keep bystanders a safe distance away from the work area. Anyone entering the work area must
wear personal protective equipment. Fragments of the workpiece or of a broken accessory tool may
fly off and cause injury beyond the immediate area of operation.
▶
Hold the power tool only by the insulated gripping surfaces when carrying out work in which the
accessory tool can come into contact with concealed wiring or with the power tool's own supply
cord. If the accessory tool comes into contact with a live wire, metal parts of the power tool can also
become live, resulting in an electric shock.
▶
Keep the power cord well clear of rotating accessory tools. If you lose control, the power cord could
be cut or snagged and your hand or arm pulled into contact with the rotating accessory tool.
▶
Never lay the power tool down before the accessory tool has come to a complete stop. If the
rotating accessory tool is allowed to touch the surface on which you 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 on 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.
▶
Do not use accessory tools that require liquid coolants. Using water or other liquid coolants can
cause electric shock.
Kickback and the applicable safety instructions
Kickback is the abrupt reaction to the sudden stalling of a pinched or snagged rotating disc, backing pad
or other accessory tool. Pinching or snagging causes the rotating accessory tool to come to an abrupt
stop. This causes an uncontrolled power tool to be forced in the direction opposite to the accessory tool’s
direction of rotation at the point of binding.
For example, if an abrasive disc is snagged or pinched by the workpiece, the edge of the disc entering the
pinch point can dig into the surface of the material causing the disc to climb out or kick back. The disc
then skips toward or away from the operator, depending on the disc’s direction of movement at the point of
pinching. Abrasive discs can also break under these conditions.
Kickback is the result of power tool misuse and/or incorrect operating procedures or conditions. It can be
avoided by taking the proper precautions as described below.
▶
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. By adopting suitable precautionary measures the operator can control the
kickback and reaction forces.
▶
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 disc’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 has a tendency to jam at
corners and sharp edges, or if it bounces off the workpiece. This causes loss of control or kickback.
Special safety instructions applicable to grinding:
▶
Use only abrasive disc types approved for use with the power tool and the specific guard designed
for the selected disc. Discs 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 plane 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. For example: Never try to use the flat
side of an abrasive cut-off disc for grinding. Abrasive cut-off discs are intended for cutting at their
peripheral edge. Lateral forces applied to these discs can cause them to shatter.
Printed: 20.07.2017 | Doc-Nr: PUB / 5169257 / 000 / 05