Fig
.
6
Hammer/drilling selection switch (Fig. 7)
1
. When drilling in concrete, granite, tile, marble, etc., push the selection switch to the side marked with
symbol
.
2
.
To select drilling mode for drilling in wood and metal, push the selection switch to the side marked with
symbol
.
Drilling
1. Secure the material to be drilled in a vise or with clamps to keep it from turning as the drill bit
rotates.
2. Install the correct bit.
3. Verify that the direction-of-rotation selector is at the correct setting (forward).
4. Hold the hammer drill firmly and place the bit at the point to be drilled.
5. Press the trigger switch to start the hammer drill.
6. Move the drill bit into the workpiece, applying only enough pressure to keep the bit cutting. Do not
force the hammer drill or apply side pressure to elongate a hole. Allow the tool to do the work.
7. When drilling hard, smooth surfaces, use a cent
re
punch to mark the desired location of the hole.
This will prevent the drill bit from slipping off-cent
re
as the hole is started.
8. If the bit jams in the workpiece or if the drill stalls , stop the tool immediately. Reverse the direction of
rotation and gently squeeze the trigger switch to remove the bit from the workpiece. Investigate and
correct the cause of jamming before you resume work.
Drilling in wood
For maximum performance, use high-speed steel or brad-point bits for wood drilling.
1. Begin drilling at a very low speed to prevent the bit from slipping off the starting point.
2. Increase the speed as the drill bit enters the material.
3. When drilling holes all the way through the workpiece, place a block of wood behind the workpiece to
prevent ragged or splintered edges on the back side of the hole.
Drilling in metal
For maximum performance, use high-speed steel bits for metal or steel drilling.
1. When drilling metals, use 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.
2. Begin drilling at a very low speed to prevent the bit from slipping off the starting point.
3. Maintain a speed and pressure that allows cutting without overheating the bit. Applying too much
pressure will:
Overheat the hammer drill
Wear the bearings
Bend or burn the bits
Produce off-cent
re
or irregularly shaped holes.
Drilling in masonry
For maximum performance, use carbide-tipped masonry bits when drilling holes in brick, tile, concrete,
etc.
1. Maintain a speed and pressure
that
allows cutting without overheating the bit or drill. Applying too
much pressure will:
Overheat the hammer drill
Wear the bearings
Bend or burn bits
Produce off-cent
re
or irregular shaped holes.
2. Apply light pressure and medium speed for best results in brick.
3. Apply additional pressure for hard materials such as concrete.
4. 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.
Fig
.
7
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model
no
.
054
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2015 l contact us 1.800.689.9928
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