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13
kobalttools.com
OPERATING INSTRUCTIONS
12. Drilling
WARNING
• Always wear safety goggles or safety glasses with side
shields during power tool operation or when blowing
dust. If operation is dusty, also wear a dust mask.
a. Check the direction-of-rotation selector (E) for the
correct setting (forward or reverse).
b. Secure the material to be drilled in a vise or with
clamps to keep it from turning as the drill bit rotates.
c. Hold the drill/driver rmly and place the bit at the
point to be drilled.
d. Depress the variable-speed trigger switch (D) to start
the drill/driver.
e. Move the drill bit into the work piece, applying only
enough pressure to keep the bit drilling. Do not force the drill/driver or apply side pressure to
elongate a hole. Let the tool do the work.
f. When drilling hard, smooth surfaces, use a center punch (sold separately) to mark the desired
location of the hole. This will prevent the drill bit from slipping off center as the hole is started.
g. If the bit jams in the work piece or if the drill/driver stalls, stop the tool immediately. Remove the
bit from the work piece and determine the reason for jamming.
h. To stop the drill/driver, release the variable speed trigger switch and allow the tool to come to a
complete stop.
Wood Drilling
a. For maximum performance, use high-speed steel or brad-point bits for drilling wood.
b. Begin drilling at a very low speed to prevent the bit from slipping off the starting point.
c. Increase speed as the drill bit bites into the material.
d. When drilling “through” holes, place a block of wood behind the work piece to prevent ragged
or splintered edges on the back side of the hole.
Metal Drilling
a. For maximum performance, use high-speed steel bits for drilling metal or steel.
b. 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 action.
c. Begin drilling at a very low speed to prevent the bit from slipping off the starting point.
d. Maintain a speed and pressure which will allow cutting without overheating the bit. Applying too
much pressure will:
• Overheat the drill/driver.
• Wear the bearings.
• Bend or burn bits.
• Produce off-center or irregularly-shaped holes.
12
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