DRIVING NUTS AND BOLTS
Variable speed control must be used with caution
for driving nuts and bolts with socket set attach -
ments. 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 a -
tion, 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 “wander ing”.
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
The procedure shown in Fig. 8 will enable you
to fasten materials together using your 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
material 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
surface. Realign the holes on the two pieces
and apply even pressure when driving the
-12-
TEMPERATURE OVERLOAD
PROTECTION
Avoid using battery operated tools continuously,
for long periods of time, while subjecting the tool
to overload conditions, such as drilling with large
diameter accessories into hard materials. Using
battery powered tools at extreme loads, may
cause the battery to exceed its allowable
operating temperature range. When the battery
exceeds normal operating temperature caused
by overload, the speed of the tool may be
reduced and the tool may appear to lose power.
To regain the tool's full performance, the battery
must be allowed to cool, until the operating
temperature returns to normal.
2. Drill same diameter
as screw shank
3. Countersink
same diameter
as screw head
1. Drill 2/3 diameter
and 2/3 of screw
length for soft
materials, full
length for hard
materials
Screw
Apply a slight
even pressure
when driving
screws
Adjustable
Screw
Drill
Top
Bottom
FASTENING
WITH SCREWS
FIG. 8
Operating Tips
2610067278 03-21 GSR18V-190 20210317.qxp_GSR18V-190 3/17/21 3:40 PM Page 12
