Skil PWRCORE HD6290A-00 Owner's Manual page 18

Masonry Drilling
For maximum performance, use carbide-tipped masonry bits when drilling holes in brick, tile,
concrete, etc.
Maintain a speed and a pressure that allow cutting without overheating the bit or drill.
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Applying too much pressure will:
Overheat the drill.
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Wear the bearings.
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Bend or burn bits.
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Produce off-center or irregular-shaped holes.
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Apply light pressure and medium speed for best results in brick.
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Apply additional pressure for hard materials such as concrete.
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You can make an improvised dust collector by taping a folded piece of paper (or a file folder)
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to a wall, to reduce the amount of dust when drilling in walls (Fig. 12a).
A tennis ball cut in half can serve as a dust collector when drilling in ceilings (Fig. 12b).
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When drilling holes in tile, practice on a scrap piece to determine the best speed and
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pressure. To prevent the drill bit from skidding/sliding, first apply two pieces of masking tape
to create an "X" shape over the intended drilling spot (Fig. 12c). To prevent tile damage, do
not run the tool in hammer drilling setting
Begin drilling at a very low speed to prevent the bit from slipping off the starting point.
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Fig.12a
Dust-free drilling in walls
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Fig.12b
Dust-free drilling in ceilings
.
Fig.12c
Drilling in tiles without
skidding