Operating Instructions - Bosch 11263EVS Operating/Safety Instructions Manual

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
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.

Operating Instructions

Control setting
1 - 2
3
4
5 - 6
Higher speeds
Faster penetration
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.
"TURBO" FEATURE
In the "Hammer Only" mode power is
automatically increased 20% when the tool is
turned on to provide maximum chiselling
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.
INSTALLING ACCESSORIES
Clean the insert shank end of the accessory
to remove any debris, then lightly grease with
a light oil or lubricant.
Insert accessory into the tool holder through
the dust shield, while twisting and pushing
inward until it locks automatically into place.
Pull outward on the accessory to be certain it
is locked into the tool holder (Fig. 2).
NOTE: The high efficiency available from the
rotary hammers can only be obtained if sharp
and undamaged accessories are used. The
"cost" to maintain sharp and undamaged
accessories is more than offset by the "time
saved" in operating the tool with sharp
accessories.
REMOVING ACCESSORIES
! WARNING
skin and use proper protective gloves or cloth
to remove.
-7-
(EFC)
Accessories may be hot
after use. Avoid contact with