You will extend th e life of your bits and do
neate r w ork if you alw ays put th e b it i n
conta ct w ith the wor k b efore pu lling th e
trigger. During the oper a tion, hol d the tool
firmly and exert lig ht, steady pressure. Too
much pressure at low speed will stall the tool.
Too little pr essure wi ll k eep the bit from
cutting and cause ex cess friction by sliding
over the surface. This can be damaging t o
both tool and bit.
DRILL BITS
Always inspect drill bits for excessive wear.
Use o nly b its that are sharp and in good
condition.
TWIST BITS : Av ailabl e wi th s traig ht a nd
reduced shanks for wood and light duty metal
drilling. High spee d bits cut fa ster and last
longer on hard ma terials.
CARBIDE TIPPED BITS : Used for drilli ng
stone, con crete, plaster, c ement an d other
unusually hard non metals. Use cont inuous
heavy feed pres sure when employing carbide
tip bits.
DRILLING WOOD
Be certain workpiece is clamped or anchored
firm ly. Always apply pressure in a straight line
with the drill bit. Maintain enough pressure to
keep the drill “biting”.
When drilling holes in wood, twist bits can be
used. Twist bits may overheat unless pulled out
frequently to clear chips from flutes.
Use a “back-up” block of wood for work that is
likely to splinter, such as thin materials.
You will drill a cleaner hole if you ease up on
the pressure just before the bit breaks through
the wood. Then complete the hole from the
back side.
DRILLING METAL
There are two rules for drilling hard materials.
First, the harder the material, the greater the
pres sure you need to apply to the tool. Second,
the harder the material, the slower the speed.
Here are a couple of tips for drilling in metal.
Lubri cate the tip of the bit occasionally with
cutting oil except when drilling soft metals such
as alu minum, cop per or cast iron. If the hole to
be drilled is fairly large, drill a smaller hole first,
then enlarge to the required size, it’s often
faster in th e long ru n. Main tain eno ugh
pressure to assure that the bit does not just
spin in the hole. This will dull the bit and greatly
shorten its life.
DRILLING MASONRY
Soft materials such as brick are relatively easy
to drill. Concrete however, will require much
more pressure to keep the bit from spinning. Be
sure to use carbide tip bits for all masonry work.
Before usin g an accessory,
be certain that its maximum
safe operating speed is not exceeded by the
nameplate speed of the tool. Do not exceed
the recommended wheel diameter.
WIRE BRUSHES
Work with brushes requires high speeds.
BRUSHING PRESSURE
1. Remember, the tips of a wire brush do the
work. Operat e the bru sh wi th t he li ghtest
pressure so only the tips of the wire come in
contact with the work.
2. If heavier pressures a re used, the wires
will b e over stressed, resu lting in a wipin g
action; and if this is continued, the life of the
brush will be shortened due to wire fatigue.
3. Apply the brush to the work in such a way
that as much of the brush face as possible is
in ful l cont act w ith th e wor k. Ap plying the
side or edge of the brush to the work will
result in wire breakage and shortened brush
life.
CORRECT:Wire tips doing the work.
INCORRECT:Excessive pressure can cause wire breakage.
!
WARNING
Operating Tips-8-
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