Bosch GSB12V-300 Operating/Safety Instructions Manual page 14

2610056578.qxp_GSR12V-300 4/20/20 2:49 PM Page 14
Protection against Deep
Discharging
The lithium ion battery is protected against
deep discharging by the "Electronic Cell
Protection (ECP)". When the battery is
empty, the tool is switched off by means of
a protective circuit.
Variable Speed Controlled
Trigger Switch
Your tool is equipped with a variable speed
trigger switch. The tool can be turned
"ON" or "OFF" by squeezing or releasing the
trigger. The speed can be adjusted from
the minimum to maximum nameplate RPM
by the pressure you apply to the trigger.
Apply more pressure to increase the speed
and release pressure to decrease speed
(Fig. 1).
Brake
When the trigger switch is released it
activates the brake to stop the chuck
quickly. This is especially useful in the
repetitive driving and removal of screws.
Forward/Reversing Lever and
Trigger Lock
position to help prevent accidental starts
and accidental discharge.
comes to a complete stop. Shifting during
rotation of the chuck can cause damage to
the tool.
Your tool is equipped with a forward/
reversing lever and trigger lock 4 located
above the trigger (Fig. 7). This lever was
designed for changing rotation of the bit,
and for locking the trigger in an "OFF"
position.
For forward rotation, (with chuck pointed
away from you) move the lever to the far
left.
For reverse rotation move the lever to the
far right.
To lock the trigger in the "OFF" position,
move the lever to the center.
Operating Instructions
After tool use, lock
trigger in "OFF"
Do not change direction
of rotation until the tool
4
Gear Shifting
Your tool is equipped with two separate
gear ranges, low gear and high gear. Low
gear provides high-torque and slower
drilling speeds for heavy duty work or for
driving screws. High gear provides faster
speeds for drilling lighter work. To change
speeds slide the gear selector 5, to the
high position "2" or low position "1" (Fig.
1).
ATTENTION: If your tool appears to be
running, but the chuck will not turn, check
to make sure the gear selector is pushed
fully into desired setting.
Adjustable Clutch
Your tool features 21 clutch settings.
Output torque will increase as the clutch
ring 8, is rotated from 1 to 20. The drill
" " position will lock the clutch to
permit drilling and driving heavy duty work
(Fig. 1). Select the proper clutch setting for
your application.
Drill/Hammer Drill/Driving
Mode Selector ring
GSB12V-300 ONLY
The mode selector ring 12 allows the tool
to be set for various drilling/hammer
drilling and driving applications. Rotate the
selector ring right or left depending on the
below applications (Fig. 8).
Driving action: The driving position allows
operation of adjustable clutch for driving
screws and tightening nuts and bolts.
14
Fig. 7
4