Flex FX1151 Operator's Manual page 19

DRILLING MASONRY (FX1251 ONLY)
For maximum performance, use carbide-tipped
masonry bits when drilling holes in brick, tile,
concrete, etc.
Maintain the speed and a pressure that allow
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drilling without overheating the bit or drill.
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
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best results in brick.
Apply additional pressure for hard materials
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such as concrete.
When drilling holes in tile, practice on a
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scrap piece to determine the best speed and
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. 18).
Begin drilling at a very low speed to prevent
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the bit from slipping off the starting point.
(FIG. 18)
Fig. 18
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