Maintenance - Bosch GSR12V-300FC Operating/Safety Instructions Manual

enough pressure to keep the drill "biting".
When drilling holes in wood, twist bits can
be used. Twist bits may overheat unless
pulled out frequently to clear chips from
flutes.
Use a "back-up" block of wood for work that
is likely to splinter, such as thin materials.
You will drill a cleaner hole if you ease up
on the pressure just before the bit breaks
through the wood. Then complete the hole
from the back side.
▶ Drilling Metal
There are two rules for drilling hard ma-
terials. First, the harder the material, the
greater the pres sure you need to apply to
the tool. Second, the harder the material,
To avoid accidents, always disconnect the tool and/or charger from the power
supply before servicing or cleaning.
▶ Service
tive maintenance performed by un au-
thorized personnel may result in misplac-
ing of internal wires and components
which could cause serious hazard. We
recom mend that all tool service be per-
formed by a Bosch Factory Service Center or
Authorized Bosch Service Station. SERVICE-
MEN: Disconnect tool and/or charger from
power source before servicing.
▶ Batteries
Be alert for battery packs that are nearing
their end of life. If you notice decreased
tool performance or significantly shorter
running time between charges then it is
time to replace the battery pack. Failure to
do so can cause the tool to operate improp-
erly or damage the charger.
▶ Tool Lubrication
Your Bosch tool has been properly lubricat-
ed and is ready for use.
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Operating Tips

Maintenance

NO USER SERVICEABLE
PARTS INSIDE. Preven-
the slower the speed. Here are a couple of
tips for drilling in metal. Lubri cate the tip of
the bit occasionally with cutting oil except
when drilling soft metals such as alu minum,
cop per or cast iron. If the hole to be drilled
is fairly large, drill a smaller hole first, then
enlarge to the required size, it's often faster
in the long run. Main tain enough pressure
to assure that the bit does not just spin in
the hole. This will dull the bit and greatly
shorten its life.
▶ Motors
The motor in your tool has been engineered
for many hours of dependable service.
To maintain peak efficiency of the motor,
we recommend it be examined every six
months. Only a genuine Bosch replace-
ment motor specially designed for your tool
should be used.
▶ Cleaning
Certain cleaning agents
and
plastic parts. Some of these are: gasoline,
car bon tetrachloride, chlorinated cleaning
solvents, ammonia and household deter-
gents that contain ammonia.
Ventilation openings and switch levers must
be kept clean and free of foreign matter. Do
not attempt to clean by inserting pointed
objects through opening.
solvents damage
6/11/19 2:10 PM