Variable Speed; Electrical Safety - DeWalt D25404 Traducido De Las Instrucciones Originales

EN GLI SH
INTENDED USE
Your rotary hammerdrill has been designed for
professional rotary drilling and hammerdrilling as
well as light chipping, chiselling and demolition
applications and for carbide-tipped core drilling.
DO NOT use under wet conditions or in presence of
flammable liquids or gases.
These hammerdrills are professional power tools.
DO NOT let children come into contact with the
tool. Supervision is required when inexperienced
operators use this tool.
Torque Limiting Clutch
All rotary hammerdrills are equipped with a torque
limiting clutch that reduces the maximum torque
reaction transmitted to the operator in case of
jamming of a drill bit. This feature also prevents the
gearing and electric motor from stalling. The torque
limiting clutch has been factory-set and cannot be
adjusted.

Variable Speed

The variable speed feature allows speed to build
up slowly, thus preventing the drill bit from walking
off the intended hole position when starting. The
feature also reduces the immediate torque reaction
transmitted to the gearing and the operator if the
hammer is started with the drill bit in an existing hole.

Electrical Safety

The electric motor has been designed for one
voltage only. Always check that the power supply
corresponds to the voltage on the rating plate.
Your D WALT charger is double insulated
E
in accordance with EN 60745; therefore
no earth wire is required.
WARNING: 115 V units have to
be operated via a fail-safe isolating
transformer with an earth screen
between the primary and secondary
winding.
If the supply cord is damaged, it must be replaced
by a specially prepared cord available through the
D WALT service organization.
E
Mains Plug Replacement
(U.K. & Ireland Only)
If a new mains plug needs to be fitted:
• Safely dispose of the old plug.
26
• Connect the brown lead to the live terminal in
the plug.
• Connect the blue lead to the neutral terminal.
WARNING: No connection is to be
made to the earth terminal.
Follow the fitting instructions supplied with good
quality plugs. Recommended fuse: 13 A.
Using an Extension Cable
An extension cord should not be used unless
absolutely necessary. Use an approved extension
cable suitable for the power input of your charger
(see technical data). The minimum conductor size is
2
1 mm ; the maximum length is 30 m.
When using a cable reel, always unwind the cable
completely.
ASSEMBLY AND ADJUSTMENTS
WARNING: To reduce the risk of
injury, turn unit off and disconnect
machine from power source before
installing and removing accessories,
before adjusting or changing set-ups
or when making repairs. Be sure the
trigger switch is in the OFF position. An
accidental start-up can cause injury.
Selecting the Operating Mode (fig. 2)
The tool can be used in the following operating
modes:
Rotary drilling: for screwdriving and for
drilling into steel, wood and plastics
Hammerdrilling: for concrete and
masonry drilling operations.
Hammering only: for light chipping,
chiselling and demolition applications. In
this mode the tool can also be used as a
lever to free a jammed drill bit.
Bit rotation: non-working position used
only to rotate a flat chisel into the desired
position.
1. To select the operating mode, press the safety
lock (c) and rotate the mode selector switch
(b) until it points to the symbol of the required
mode.
2. Release the safety lock and check that the
mode selector switch is locked in place.
WARNING: Do not select the operating
mode when the tool is running.