Hart HPHD01 Manual Del Operador página 8

OPERATION
The torque is adjusted by rotating the torque adjustment
ring.
The torque is greater when the torque adjustment ring is
set on a higher setting. The torque is less when the torque
adjustment ring is set on a lower setting.
The proper setting depends on the type of material and the
size of screw you are using.
DRILLING/DRIVING SCREWS
See Figure 9, page 12.
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).
Select low speed (1) or high speed (2), depending on

your application. 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 opposite to the direction of rotation and could
cause loss of control when breaking through material. If
not prepared, this loss of control can result in possible
serious injury.
NOTE: MAINTENANCE INFORMATION BEGINS ON PAGE 10 AFTER FRENCH AND SPANISH
LANGUAGE SECTIONS. ILLUSTRATIONS START ON PAGE 11.
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.
NOTE: If operation creates considerable dust, frequent
vacuuming of the work area is recommended.
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.
Metal and Steel Drilling
Use a light oil on the drill bit to keep it from overheating.

The oil will prolong the life of the bit and increase the
drilling action.
Maintain a speed and pressure which allows cutting

without overheating the bit. Applying too much pressure
will:
• Overheat the drill;
• Wear the bearings;
• Bend or burn bits; and
• Produce off-center or irregular-shaped holes.
When drilling large holes in metal, start with a small bit,

then finish with a larger bit.
MASONRY DRILLING
For maximum performance, use carbide-tipped masonry
impact bits or designated hammer drill bits when drilling
holes in brick, tile, concrete, etc. Select hammer mode.
Apply light pressure at medium speed for best results in

brick.
Apply additional pressure for hard materials such as

concrete.
When drilling holes in tile, practice on a scrap piece to

determine the best speed and pressure. Begin drilling at
a very low speed to prevent the bit from slipping off the
starting point.
8 - English