Skil HD529401 Owner's Manual page 19

Metal Drilling
For maximum performance, use high-speed steel bits for metal or steel drilling.
When drilling metals, use light oil on the drill bit to keep it from overheating. The oil will
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prolong the life of the bit and increase the drilling action.
Begin drilling at a very low speed to prevent the bit from slipping off the starting point.
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Maintain a speed and a pressure that allow cutting without overheating the bit. Applying too
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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 irregularly shaped holes.
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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.
–
Bend or burn bits.
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Produce off-center or irregular-shaped holes.
–
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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When drilling holes in tile, practice on a scrap piece to determine the best speed and
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pressure.
Begin drilling at a very low speed to prevent the bit from slipping off the starting point.
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NOTICE: Fig.12 shows some tips for different drilling operations.
Fig. 12
Dust-free drilling in walls
Dust-free drilling in ceilings
Drilling in tiles without
skidding
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