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Before using an accessory, be certain that its maximum safe operating speed
is not exceeded by the nameplate speed of the tool. Do not exceed the recom-
mended accessory diameter.
Driving Nuts and Bolts
Variable speed control must be used with cau-
tion for driving nuts and bolts with socket set
attachments. The technique is to start slowly,
increasing speed as the nut or bolt runs down.
Set the nut or bolt snugly by slowing the drill to
a stop. If this procedure is not followed, the tool
will have a tendency to torque or twist in your
hands when the nut or bolt seats.
Drilling
You will extend the life of your bits and do neater
work if you always put the bit in contact with the
work before pulling the trigger. During the oper-
ation, hold the tool firmly and exert light, steady
pressure. Too much pressure at low speed will
stall the tool. Too little pressure will keep the bit
from cutting and cause excess friction by sliding
over the surface. This can be damaging to both
tool and bit.
Drilling with Variable Speed
The variable speed trigger allows you to slowly
increase RPM. By using a slow starting speed,
you are able to keep the bit from "wandering".
You can increase the speed as the bit "bites"
into the work by squeezing the trigger.
Driving with variable speed
Variable speed drills will double as a power
screwdriver by using a screwdriver bit. Prior to
driving screws, pilot and clearance holes should
be drilled. Place the threaded end of the screw
in the pilot or clearance hole and start driving
the screw slowly, increasing the speed as the
screw runs down. Set the screw snugly by slow-
ing to a stop.
Fastening with Screws
The procedure shown in Fig. 12 will enable you
to fasten materials together using your drill with-
out stripping, splitting or separating the mate-
rial.
2610070413 GSR18V800C 202308.indd 19
Operating Tips
Fig. 12
FASTENING
WITH SCREWS
1. Drill 2/3 diameter and
2/3 of screw length for
soft materials, full
length for hard
materials.
First, clamp the pieces together and drill the
hole 2/3 the diameter of the screw. If the mate-
rial is soft, drill only 2/3 the proper length. If it
is hard, drill the entire length.
Second, unclamp the pieces and drill the hole in
the top piece of wood again to the same diam-
eter as the shank of the screw.
Third, if flat head screw is used, countersink the
hole to make the screw flush with the surface.
Realign the holes on the two pieces and ap-
ply even pressure when driving the screw. The
screw shank clearance hole in the first piece al-
lows the screw head to pull the pieces tightly
together.
The adjustable screw drill accessory will do all
of these operations quickly and easily. Screw
drills are available for screw sizes No. 6, 8, 10
and 12.
Drill Bits
Always inspect drill bits for excessive wear. Use
only bits that are sharp and in good condition.
TWIST BITS: Available with straight and reduced
shanks for wood and light duty metal drilling.
High speed bits cut faster and last longer on
hard materials.
2. Drill same
diameter as
screw shank.
Screw
Apply a slight
even pressure
when driving
screws.
3. Countersink
same diameter
as screw head.
Adjustable
Screw
Drill
Top
Bottom
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8/3/23 11:06 AM
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