Hilti DCH 300 Manual De Instrucciones página 18

7.5 Working with cutting discs
en
DANGER
To reduce the risk of kick-back, avoid bringing the
cutting tool into contact with the material in the area
indicated.
DANGER
Wherever possible, bring the wheels into contact with
the workpiece before starting the cut. Take extra care
in situations where this is not possible or where the
cutting disc is inserted in an existing cut.
1. When cutting mineral materials, first bring the tool's
guide wheels into contact with the object to be cut.
2. Allow the power tool to reach full speed.
8 Care and maintenance
CAUTION
Disconnect the supply cord plug from the power out-
let.
8.1 Care of the power tool
DANGER
When working on metal under extreme conditions, con-
ductive dust may accumulate inside the power tool. This
may negatively affect the power tool's protective in-
sulation. Under such conditions, the tool should be
plugged into a ground fault circuit interrupter (GFCI)
and use of a stationary dust removal system and
8.2 Service indicator
NOTE
The power tool is equipped with a service indicator.
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3. Apply pressure to the power tool so that the cutting
disc is pressed into the material slowly. This ensures
that particles and sparks generated by the cutting
operation are caught by the hood and extracted by
the dust removal system.
NOTE Apply moderate pressure, adjusting the rate
of advance to suit the material being cut.
NOTE The diamond disc may overheat and suffer
damage when cutting very hard mineral materials,
e.g. concrete with a high hard pebble content. A
trail of sparks right round the circumference of the
diamond cutting disc is a sure indication of this.
Should this occur, stop cutting and cool the disc by
allowing the tool to run under no load.
A drop in the rate of cutting progress can be an
indication of "blunt" (polished) diamond segments.
The segments can be resharpened by making a few
cuts in an abrasive material (Hilti sharpening plate
or sand-lime block).
7.6 Using a suitable vacuum cleaner for working on
mineral materials
NOTE
Please read the operating instructions for the vacuum
cleaner for information about disposal of the material
collected.
Dust can be kept to a minimum when working by using
a suitable vacuum cleaner (such as the Hilti VCD 50).
Use of a vacuum cleaner also helps to cool the segments
on the disc and thus reduces segment wear. In order to
avoid electrostatic effects, a vacuum cleaner equipped
with an antistatic hose should be used.
frequent cleaning of the tool's cooling air slots is
recommended.
The outer casing of the motor and the grips are made
from impact-resistant plastic. Parts of the grips have a
synthetic rubber covering.
Never operate the power tool when the ventilation slots
are blocked. Clean the ventilation slots carefully using
a dry brush. Do not permit foreign objects to enter the
interior of the power tool. Clean the outside of the power
tool at regular intervals with a slightly damp cloth. Do
not use a spray, steam pressure cleaning equipment or
running water for cleaning. This may negatively affect the
electrical safety of the power tool. Always keep the grip
surfaces of the power tool free from oil and grease. Do
not use cleaning agents which contain silicone.