Hilti DD 110-D Manual De Instrucciones Original página 25

Safety instructions when using long drill bits
▶ Never operate at higher speed than the maximum speed rating of the drill bit. At higher speeds,
the bit is likely to bend if allowed to rotate freely without contacting the workpiece, resulting in personal
injury.
▶ 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
Personal safety
▶ 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.
▶ During hand-held use, always hold the machine securely with both hands on the grips provided. Keep
the grips dry, clean and free from oil and grease.
▶ Respiratory protection must be worn if the machine is used without a dust extraction system for work
that creates dust.
▶ Take frequent breaks and do physical exercises to improve the blood circulation in your fingers. High
vibration during long periods of work can lead to disorders of the blood vessels and nervous system in
the fingers, hands and wrists.
▶ Avoid touching rotating parts. Switch the power tool on only after bringing it into position at the
workpiece. Touching rotating parts, especially rotating drill bits, discs or blades, etc. may lead to injury.
▶ Always route the supply cord, the extension cord and, if applicable, the vacuum-cleaner hose, to the rear
and away from the machine. This helps to avoid tripping over the cord or hose while working.
▶ Wear protective gloves when changing the accessory tool. The accessory tool can become hot in use.
▶ Children are not permitted to play with the machine and must be instructed accordingly.
▶ The power tool is not intended for use by children, by debilitated persons or those who have received no
instruction or training.
▶ Dust from materials such as paint containing lead, some types of wood, minerals and metal can be
harmful to health. Contact with or inhalation of the dust can cause allergic reactions and/or respiratory
or other diseases to the operator or bystanders. Certain kinds of dust such as oakwood and beechwood
dust are classified as carcinogenic, especially in conjunction with additives for wood conditioning
(chromate, wood preservative). Only specialists are permitted to work on material containing asbestos.
Use a dust-extraction device wherever possible. To achieve a high level of dust extraction, use a suitable
mobile dust extractor of a type that is recommended by Hilti for wood dust and/or mineral dust and
which is designed for use with this power tool. Make sure that the workplace is well ventilated. It is
advisable to wear a filter class P2 dust mask. Comply with national regulations applicable to the materials
you will be working with.
▶ The user and persons in the vicinity must wear suitable protective goggles, a hard hat, ear defenders,
protective gloves, protective footwear and light respiratory protection while the tool is in use.
Power tool use and care
▶ Secure the workpiece. Use clamps or a vice to secure the workpiece. The workpiece is thus held more
securely than by hand and both hands remain free to operate the machine.
▶ Check that accessory tools are compatible with the machine's chuck/drive system and that they are
installed and secured correctly.
▶ Switch the appliance off and unplug the supply cord in the event of a power failure or interruption in the
electric supply. This will prevent accidental restarting when the electric power returns.
▶ Do not use damaged insert tools. Check the core bits for chipping, cracks, or heavy wear each time
before use. Do not use damaged tools. Fragments of the workpiece or a broken core bit may be ejected
and cause injury beyond the immediate area of operation.
▶ In accordance with the applications for which it is designed, the product produces a high torque. Always
use the side handle and hold the product with both hands. The user must be prepared for sudden stalling
of the accessory tool and have an absolutely secure stance with both feet.
Electrical safety
▶ Before beginning work, check the working area (e.g. using a metal detector) to ensure that no concealed
electric cables or gas and water pipes are present. External metal parts of the power tool may become
live, for example, if an electric cable is damaged accidentally. This presents a serious risk of electric
shock.
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274860 English 19