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Flex FX1671 Manuel De L'utilisateur page 19

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DRILLING WOOD (FIG. 16)
For maximum performance, use high-speed
steel or brad-point bits for wood drilling.
Begin drilling at a very low speed to prevent
the bit from slipping off the starting point.
Increase speed as the drill bit bites into the
material.
When drilling "through" holes, secure a block
of wood behind the workpiece to prevent
ragged or splintered edges on the back side of
the workpiece.
NOTICE: Bits may overheat unless reversed and
pulled out frequently to clear chips from flutes.
DRILLING METAL
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
prolong the life of the bit and increase the
drilling efficiency.
Begin drilling at a very low speed to prevent
the bit from slipping off the starting point.
DRILLING MASONRY (FIG. 17)
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.
Applying too much pressure will:
Overheat the drill.
Wear the bearings.
Bend or burn bits.
Produce off-center or irregular-shaped holes.
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. 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. 17).
Fig. 16
Maintain a speed and a pressure that allow
cutting without overheating the bit. Applying
too much pressure will:
Overheat the Drill.
Wear the bearings.
Bend or burn bits.
Produce off-center or irregularly shaped holes.
Fig. 17
Begin drilling at a very low speed to prevent
the bit from slipping off the starting point.
-19-

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