Lutool LT3IN1, Instruction Manual, Page: 19 / 31

11.9 Drilling
Before drilling, the torque setting should be set on drill position “ ”.
When drilling hard smooth surface, use a centre punch to mark the desired hole location. This will
prevent the drill bit from slipping off centre as the hole is started. Hold the tool firmly and place the tip
of the drill or bit into the work piece, applying only enough pressure to keep the bit cutting. Do not force
or apply side pressure to elongate a hole.
11.9.1 Wood Drilling
For maximum performance, use high speed steel drill bits for wood drilling, turn the torque setting on
the drill position“ ”. Begin drilling at a very low speed to prevent the bit from slipping off the starting
point. Increase the speed as the drill bit bites into the material. When drilling through holes, place a
block or wood behind the work piece to prevent ragged or edges on the back side of the hole.
11.9.2 Metal drilling
For maximum performance, use high speed steel bits for metal or steel drilling. Turn the torque setting
on the drill position“ ”. Begin drilling at a very low speed to prevent the bit from slipping off the
starting point. Maintain a speed and pressure which allows cutting without overheating the bit. Applying
too much pressure will overheat the drill; wear the bearings, bend or burn bits, produce off-centre or
irregular shaped holes.
When drilling large holes in metal, it is recommended that you drill with a small bit at first, then finish
with a large bit, also lubricate the bit with oil to improve drilling action and increase bit life.