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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. Using an ac-
cessory beyond its rated speed can cause personal or property damage.
Driving Nuts and Bolts
Variable speed control must be used with
caution 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 con-
tact with the work before pulling the trigger.
During the operation, hold the tool firmly and
exert light, steady pressure. Too much pres-
sure at low speed will stall the tool. Too little
pressure will keep the bit from cutting and
cause excess friction by sliding over the sur-
face. 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 start-
ing 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 slowing to a stop.
Fastening with Screws
(Fig. 24)
The procedure shown in Fig. 24 will enable
you to fasten materials together using your
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Operating Tips
page heading
Fig. 24
FASTENING
WITH SCREWS
1. Drill 2/3 diameter and
2/3 of screw length for
soft materials, full
length for hard
materials.
drill without stripping, splitting or separating
the material.
First, clamp the pieces together and drill the
hole 2/3 the diameter of the screw. If the ma-
terial 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 diameter as the shank of the screw.
Third, if flat head screw is used, countersink
the hole to make the screw flush with the sur-
face. Realign the holes on the two pieces and
apply even pressure when driving the screw.
The screw shank clearance hole in the first
piece allows the screw head to pull the piec-
es 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 con-
dition.
TWIST BITS: Available with straight and re-
duced 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
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10/24/23 3:15 PM
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