Hilti SF 4-A22 Original Bedienungsanleitung Seite 30

▶ Always start drilling at low speed and with the bit tip in contact with
the workpiece. At higher speeds, the bit is likely to bend if allowed
to rotate freely without contacting the workpiece, resulting in personal
injury.
▶ Apply pressure only in direct line with the bit and do not apply
excessive pressure. Bits can bend causing breakage or loss of control,
resulting in personal injury.
2.3 Additional safety instructions
▶ Use the product and accessories only when they are in perfect working
order.
▶ Never tamper with or modify the product or accessories in any way.
▶ Before beginning work, check the working area for concealed electric
cables or gas and water pipes. External metal parts of the product could
give you an electric shock or cause an explosion if you accidentally
damage an electric cable or a gas or water pipe.
▶ Keep the air vents clear at all times. Risk of burn injuries due to blocked
air vents!
▶ Avoid touching rotating parts – risk of injury!
▶ Wear eye protection, a hard hat and ear protection while the product is
in use.
▶ Wear protective gloves when changing the accessory tool. Touching the
accessory tool can result in cuts and burns.
▶ Wear eye protection. Flying fragments present a risk of injury to the body
and eyes.
▶ Dust produced by grinding, sanding, cutting and drilling can contain
dangerous chemicals. Some examples are: lead or lead-based paints;
brick, concrete and other masonry products, natural stone and other
products containing silicates; certain types of wood, such as oak,
beech and chemically treated wood; asbestos or materials that contain
asbestos. Determine the exposure of the operator and bystanders
by means of the hazard classification of the materials to be worked.
Implement the necessary measures to restrict exposure to a safe level,
for example by the use of a dust collection system or by the wearing
of suitable respiratory protection. The general measures for reducing
exposure include:
▶ working in an area that is well ventilated,
▶ avoidance of prolonged contact with dust,
▶ directing dust away from the face and body,
▶ wearing protective clothing and washing exposed areas of the skin
with water and soap.
▶ Take frequent breaks and do physical exercises to improve the blood
circulation in your fingers. High vibration during long periods of work can
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