Ubermann UHD04CHI Manual Del Operador página 29

OPERATION
 Choose your application.
 Choose the correct speed: LOW (1) or HIGH (2).
 Choose the correct mode: drill, drive or hammer.
NOTE: The hammer drill has not been designed for reverse
hammering.
Use carbide-tipped bits and select hammer mode when drilling
in hard materials such as brick, tile, concrete, etc.
Select drill mode when drilling with twist drills, hole saws, etc.,
in soft materials.
NOTE: When drilling in hammer mode, it is advisable to use LOW
(1) speed.
Drilling/Driving Screws
See Figure 13, page 13.
WARNING:
Always use the auxiliary handle when using this tool to help
resist torque reactions. Binding or stalling of this product could
lead to serious personal injury.
 Install the auxiliary handle.
 Check the direction of rotation selector for the correct setting
(forward or reverse)
 Use LOW (1) speed for high torque applications and HIGH (2)
speed for fast drilling or driving applications. Refer to Two-
Speed Gear Train and Adjusting Torque.
 Secure the workpiece in a vise or with clamps to keep it from
turning as the bit rotates.
 Hold the drill firmly and place the bit at the point to be drilled,
or where the screw is to be driven.
WARNING:
Do not drive a screw where there is likely to be hidden wiring
behind the surface. Contact with a "live" wire will make exposed
metal parts of the tool "live" and possibly shock the operator.
If you must drive a screw where hidden wire may be present,
always hold tool by insulated gripping surfaces (handle) when
performing the operation to prevent a shock to the operator.
 Depress the switch trigger to start the drill.
 Move the bit into the workpiece, applying only enough pressure
to keep the bit cutting or driving the screw. Do not force the
drill or apply side pressure to elongate a hole. Let the tool do
the work.
WARNING:
When drilling, be prepared for binding at bit breakthrough. When
these situations occur, drill has a tendency to grab and kick op-
posite to the direction of rotation and could cause loss of con-
trol when breaking through material. If not prepared, this loss
of control can result in possible serious injury.
 When drilling hard, smooth surfaces, use a center punch to
mark the desired hole location. This will prevent the bit from
slipping off-center as the hole is started.
 If the bit jams in the workpiece or if the drill stalls, stop the
tool immediately. Remove the bit from the workpiece and
determine the reason for jamming.
NOTE: This drill has an electric brake. When the switch trigger is
released, the chuck stops turning. When the brake is functioning
properly, sparks will be visible through the vent slots on the
housing. This is normal and is the action of the brake.
Wood and Metal Drilling
For maximum performance, use high speed steel bits for wood
or metal drilling. Select drilling mode. Begin drilling at a very
low speed to prevent the bit from slipping off the starting point.
Wood Drilling
 Increase the speed as the drill bit bites into the material.
 When drilling through holes, place a block of wood behind the
workpiece to prevent ragged or splintered edges on the back
side of the hole.
9 — English