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Idiomas disponibles
Idiomas disponibles
DRILLING WOOD (FIG. 18)
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
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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
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the bit from slipping off the starting point.
DRILLING MASONRY (FIG. 19)
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.
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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. 19).
Fig. 18
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. 19
Begin drilling at a very low speed to prevent
•
the bit from slipping off the starting point.
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