Operating Tips - Bosch GSR18V-1330C Operating/Safety Instructions Manual

2610056705 GSB18V-1330C 04-21.qxp_GSB18V-1330C GSR18V-1330C 5/3/21 7:00 AM Page 20
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. 16 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

Operating Tips

FASTENING
WITH SCREWS
1. Drill 2/3 diameter and
2/3 of screw length for
soft materials, full
length for hard
materials.
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 screw. The screw shank
clearance hole in the first piece allows 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.
Electronic Angle Detect
Orientation of the tool while calibrating the
surface will determine the reference for the
angle. On a vertical wall, if the tool is
calibrated with the chuck pointing upward,
a target angle will be established in an
upward orientation (e.g. +45°). If the tool is
calibrated with the chuck pointing
downward, a target angle will be
established in a downward orientation (e.g.
-45°).
Drill Bits
Always inspect drill bits for excessive wear.
Use only bits that are sharp and in good
condition.
20
2. Drill same
diameter as
screw shank.
3. Countersink
Screw
Apply a slight
even pressure
when driving
screws.
FIG. 16
same diameter
as screw head.
Adjustable
Screw
Drill
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