Operating Instruction DCH 300 / DCH 300-X (01)

*2149877*
2149877 English 13
5.13 Working safely with the cutter
Conditions: Working on mineral materials
There is a risk of kickback if the cutting disc comes
into contact with the working surface in the area
indicated.
▶ Avoid bringing the cutting disc into contact with the working surface in the area indicated.
▶ Always bring the guide wheels into contact with the working surface / workpiece before starting the
cut.
▶ Allow the power tool to reach full speed before beginning cutting.
▶ Apply pressure to the power tool so that the cutting disc is pressed into the material slowly.
▶ Apply moderate pressure, adjusting the rate of advance to suit the material being cut.
A decrease in the rate of cutting progress may be an indication of blunt/dull (“polished”)
diamond segments. The diamond segments can be resharpened by making a few cuts in an
abrasive material (Hilti sharpening plate or sand-lime block).
▶ Guide the power tool smoothly and do not apply lateral pressure to the cutting disc.
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 diamond cutting disc by allowing the power tool to run
under no load.
Dust can be kept to a minimum when working by using a suitable vacuum cleaner. Use of a vacuum
cleaner also helps to cool the segments on the disc and thus reduces segment wear.
▶ The vacuum cleaner should be equipped with an antistatic suction hose in order to avoid electrostatic
effects.
5.14 Switching the cutter off
▶ Release the on/off switch.
◁ The motor is switched off, the cutting disc slows and stops.
◁ The switch-on safety lock is re-activated.
6 Care and maintenance
WARNING
Danger of electric shock! Carrying out care and maintenance while the supply cord is connected to the
power outlet presents a risk of serious injuries including burns.
▶ Always unplug the supply cord before carrying out all care and maintenance tasks.
Care
▶ Keep the product, especially its grip surfaces, clean and free from oil and grease.
▶ Do not use cleaning agents containing silicone.
▶ Never operate the product with the air vents blocked. Clean the air vents carefully using a dry brush. Do
not use a sprayer, steam pressure cleaning equipment or running water for cleaning. This can endanger
the electrical safety of the power tool.
▶ Do not permit foreign matter to penetrate inside the product.
▶ Clean the outside of the power tool at regular intervals with a slightly damp cloth.
Under extreme conditions, when the power tool is used on metal conductive dust can accumulate in the
interior. This can impair the power tool's protective insulation.
▶ In cases of this nature, if possible use a stationary dust extraction system and clean the air vents at
frequent intervals.
Printed: 23.10.2018 | Doc-Nr: PUB / 5459266 / 000 / 00