Bosch 11321EVS Operating/Safety Instructions Manual - Page 9
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2610048700.qxp_11321evs 10/4/17 12:40 PM Page 9
AUTO-MAX ™
The patented Bosch Auto-Max system insures
that each time your tool is plugged in and
receiving power, it will operate at maximum
speed and impact force.
mains outlet or when branch-circuit power
is interrupted, the electronic controller will
automatically reset the tool to maximum
speed and impact force. Unexpected starting
at maximum operating speed and impact force
could startle the operator and lead to potential
injury.
"VARIO-LOCK"- SELECTOR RING
The vario-lock selector ring can be set in any
one of twelve (30˚ increments) positions.
Choose a position which is best suited for your
operation. To adjust, pull the selector ring
forward and hold firmly, then turn both the
accessory and the selector ring to the desired
position. Release the selector ring and turn
the accessory slightly until it locks in place
(Fig. 7).
VARIABLE SPEED DIAL
Your tool is equipped with a variable speed
dial. The speed and impact force can be
adjusted by rotating the dial. Higher speeds
and impact force work best for faster
penetration when chiseling in hard masonry
material. Slower speeds work best for chiseling
material such as plaster or tile (Fig. 8).
CONSTANT RESPONSE 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 virtually constant between
no-load and load conditions.
For the best penetration rates in concrete, run
the tool with a steady pressure, but do not use
excessive force as this will decrease the
efficiency of the tool.
All hammers require a short period of time to
warm up. Depending on the room temperature,
this time may vary from approximately 15
seconds (90˚F) to 2 minutes (32˚F). A new
hammer requires a break-in period before full
performance is realized. This period may
require up to 5 hours of operation.
When the power cord is
unplugged from the
Tool Tips
VARIO-LOCK
SELECTOR RING
POWER INDICATOR LIGHT
When you plug your tool into the power
source, the power indicator light will go "ON"
indicating the tool is receiving power (Fig. 8).
VIBRATION DAMPER HANDLE /
HAMMER MECHANISM
The integrated vibration damper in the main
handle and hammer mechanism reduces
vibrations (Fig. 8).
FIG. 8
An electric hammer is likely to be the most
expensive portable tool at the construction job.
The long wear and efficient operation of the
BOSCH hammers will more than justify the
cost for tools of this type. As earlier pointed
out, sharp accessories as well as clean air
vents are necessary for efficient operation.
Establish and follow a set maintenance
program.
-9-
FIG. 7
VIBRATION DAMPER
HANDLE / HAMMER
MECHANISM
VARIABLE
SPEED DIAL
SERVICE REMINDER
LIGHT
POWER INDICATOR
LIGHT