Hilti DD 30-W Manual page 6

▶ Keep the grips dry, clean and free from oil and grease.
▶ Improve the blood circulation in your fingers by relaxing your hands and exercising your fingers
during breaks between working.
▶ Avoid touching rotating parts. Switch the machine on only after bringing it into position at the
workpiece. Touching rotating parts, especially rotating accessory tools, may lead to injury.
▶ Always lead the supply cord, the extension cord and, if applicable, the suction hose away from the
machine to the rear when working. This helps to avoid tripping over the cord or hose while working.
▶ Do not allow drilling slurry to come into contact with the skin or eyes. Wear protective gloves and
protective glasses.
▶ Children are not permitted to play with the machine and must be instructed accordingly.
▶ The machine is not intended for use by debilitated persons who have received no special training.
Keep the machine out of reach of children.
▶ The accessory tool may become hot during use or during sharpening. There is a risk of burning or
cutting injuries. Wear protective gloves when touching or handling the accessory tool.
▶ When the machine is mounted on the drill stand, lay it down safely on the floor or ground during
breaks between use.
▶ Never tamper with or modify the machine in any way.
Protection from dust
Dust from material such as paint containing lead, some wood species, minerals and metal may be harmful.
Contact with or inhalation of the dust may cause allergic reactions and/or respiratory diseases to the operator
or bystanders. Certain kinds of dust are classified as carcinogenic such as oak and beech dust especially
in conjunction with additives for wood conditioning (chromate, wood preservative). Material containing
asbestos may be worked on only by specialists.
▶ Use a dust removal system that is as effective as possible. To achieve a high level of dust
collection, use a suitable vacuum cleaner of the type recommended by Hilti for wood dust and/or
mineral dust and which is designed for use with this machine. Ensure that the workplace is well
ventilated. The use of a dust mask of filter class P2 is recommended. Follow national requirements
for the materials you want to work with.
Careful handling and use of electric tools and machines
▶ 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.
▶ Ensure that the accessory tools used have a mounting system that is compatible with the drilling
machine and that they are secured in the chuck correctly.
▶ Switch the machine off and unplug the supply cord in the event of an interruption in the electric
supply in order to avoid inadvertent restarting when the power returns.
▶ Operate the machine only when the cooling air slots are unobstructed.
Electrical safety
▶ Before beginning the work, check the working area for concealed electrical cables, gas and water
pipes, e.g. using a metal detector. External metal parts of the machine may become live, for example,
when an electric cable is damaged accidentally. This presents a serious risk of electric shock.
▶ Never operate the machine without the accompanying PRCD (machines without PRCD: Never
operate the machine without an isolating transformer). Test the PRCD each time before use.
▶ Check the machine's supply cord at regular intervals and have it replaced by a qualified specialist
if found to be damaged. If the machine's supply cord is damaged it must be replaced with
a specially-prepared and approved supply cord available from Hilti Customer Service. Check
extension cords at regular intervals and replace them if found to be damaged. Do not touch the
supply cord or extension cord if it is damaged while working. Disconnect the supply cord plug
from the power outlet. Damaged supply cords or extension cords present a risk of electric shock.
▶ Avoid body contact with earthed or grounded surfaces such as pipes, radiators, cookers, stoves
and refrigerators. There is an increased risk of electric shock if your body is grounded.
▶ Do not use a plug adapter.
Workplace
▶ Ensure that the workplace is well ventilated. Exposure to dust at a poorly ventilated workplace may
result in damage to the health.
▶ Do not drill into hazardous materials (e.g. asbestos).
▶ Approval must be obtained from the site engineer or architect prior to beginning drilling work.
Drilling work on buildings and other structures may influence the static equilibrium of the structure,
especially when steel reinforcing bars or load-bearing components are cut through.
▶ It is recommended that rubber gloves and non-skid shoes are worn when working outdoors.
4 English
Printed: 06.07.2017 | Doc-Nr: PUB / 5283534 / 000 / 05