Operating Tips - Bosch GSR12V-140FC Instrucciones De Funcionamiento Y Seguridad

Battery Charge Condition
Indicator Lights
Your tool is equipped with charge condition indi-
cator lights (Fig. 1). The indicator lights shows the
charge condition of the battery for a few second
when the On/Off trigger is pressed halfway or
fully.
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 ten-
dency 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. 11 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
2610045267 A5.indd 13
Continuous lighting 3 x green
Continuous lighting 2 x green
Continuous lighting 1 x green
Flashing light 1 x green

Operating Tips

FASTENING WITH
SCREWS
1. Drill 2/3 diameter
and 2/3 of screw
length for soft ma-
terials, full length for
hard materials.
Apply a slight even
pressure when driving
screws.
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 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.
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 ma-
terials.
CARBIDE TIPPED BITS: Used for drilling stone,
con crete, plaster, cement and other unusu-
ally hard nonmetals. Use continuous heavy feed
pres sure when employing carbide tip bits.
LED Capacity
reserve
2. Drill same
ameter as screw
shank.
3. C o u n t e r s i n k
same diameter
as screw head.
Screw
Top
Bottom
Drill Bits
> 2/3
> 1/3
< 1/3
di-
Fig. 11
13
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