Bosch RH1255VC Consignes De Fonctionnement/Sécurité page 9

2610048698.qxp_RH1255VC 10/4/17 10:39 AM Page 9
DUAL FUNCTION TRIGGER SWITCH
To turn the tool "ON" in the Drilling/
Hammering mode, squeeze and hold the
trigger switch. To turn the tool "OFF", release
the trigger switch, which is spring loaded and
will return to the "OFF" position automatically
(Fig. 1).
Your tool is also equipped with a "Lock-ON"
feature when the selector dial is in the
Hammering Only mode which allows
continuous operation without holding the
trigger (Fig. 1).
TO LOCK TOOL "ON": turn the selector dial
to the Hammering Only mode and squeeze
the trigger switch until it locks.
TO TURN TOOL: "OFF" press the trigger
release switch and the trigger will return to
the "OFF" position automatically.
To increase switch life, do not turn switch on
and off while tool is under load.
VARIABLE SPEED DIAL
Your tool is equipped with a variable speed
dial (Fig. 1). The impact rate (BPM) and
rotating speed (RPM) can be varied
according to the type of work being
performed by setting the variable speed dial
to the selected setting. The chart below will
help you to determine which setting to use
for your application. However, a pre-test will
determine the best speed setting, as the
chart is intended only as a guide. Once the
proper setting is determined the impact rate
and rotating speed is kept constant by
means of the "Electronic Feedback Circuitry".
The variable speed dial can be adjusted
while the motor is running, allowing the
operator to adjust the impact rate and
rotating speed according to the actual
application.
SELECTOR LEVER
The selector lever allows the tool to be set
for various applications as listed in the
following chart, (Fig. 4).
tool comes to a complete stop. Shifting during
rotation of the chuck can cause damage to the
tool.
When using demolition or chipping bits such
Operating Instructions
Do not operate the
selection dial until the
Chipping (Demolition)
Area of application
Plaster work
Removing tiles
Brick work
Concrete
Drilling Holes
Lower speeds
Accurate starts
Minimize breakouts
when the bit exits
the material.
"TURBO" FEATURE
In the "Hammer Only" mode power is
automatically increased 20% when the tool is
turned on to provide maximum chiseling
performance.
ELECTRONIC FEEDBACK CIRCUITRY
The internal electronic feedback system
provides a "soft start", which will reduce the
stresses that occur from a high torque start.
The system also helps to keep the pre-
selected impact rate and rotating speed
virtually constant between no-load and load
conditions.
as bull points, chisels, spades, gouges, etc.
the "Hammer Only" mode must be selected.
SELECTOR LEVER - "VARIO-LOCK"
The vario-lock can be set in any one of twelve
positions (30˚ increments). Choose a position
which is best suited for your operation. The
Vario-Lock position is intended for use with
chipping bits such as bull points, spades,
gouges, etc.
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Control setting
1 - 2
3
4
5 - 6
Higher speeds
Faster penetration
(EFC)