OPERATION
DRILLING
See Figure 16, page 15.
Check the direction of rotation selector for the correct setting (forward or reverse).
Secure the material to be drilled in a vise or with clamps to keep it from turning as the drill bit rotates.
Hold the drill firmly and place the bit at the point to be drilled.
Depress the switch trigger to start the drill.
Move the drill bit into the workpiece, applying only enough pressure to keep the bit cutting. Do not force the drill or apply side pressure to elongate a hole. Let the tool do the work.
WARNING:
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.
When drilling hard, smooth surfaces, use a center punch to mark the desired hole location. This will prevent the drill bit from slipping
When drilling metals, 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.
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 trig- ger 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 DRILLING
For maximum performance, use high speed steel bits for wood drilling.
Select drilling mode.
Begin drilling at a very low speed to prevent the bit from slipping off the starting point. 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 DRILLING
For maximum performance, use high speed steel bits for metal or steel drilling.
Select drilling mode.
Begin drilling at a very low speed to prevent the bit from slipping off the starting point.
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
When drilling large holes in metal, start with a small bit, then finish with a larger bit. Also, lubricate the bit with oil to improve drilling action and increase bit life.
MASONRY DRILLING
For maximum performance, use
Slide adjustment button on hammer drill left for hammer mode.
Apply light pressure and 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.
11 — English