Bosch 11219EVS Operating/Safety Instructions Manual page 7

BM 1619929194 8/01 8/9/01
TRIGGER "ON-OFF" SWITCH
To turn the tool "ON" squeeze the trigger
switch. To turn the tool "OFF", release the
trigger switch, which is spring loaded and
will return to the
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. 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 with the tool free from work,
allowing the operator to adjust the impact
rate and rotating speed according to the
actual application.
Chipping (Demolition)
Area of application
Plaster work
Removing tiles
Brick work
Concrete
Drilling Holes
Lower speeds
Larger holes
Accurate starts
Minimize breakouts
when the bit exits
the material.
ELECTRONIC FEEDBACK
CIRCUITRY (EFC)
The internal electronic feedback system
provides a "soft start", which will reduce the
stresses that occur from a high torque start.
2:28 PM Page 7
Operating Instructions
The system also helps to keep the pre-
selected impact rate and rotating speed
virtually constant between no-load and load
conditions.
"OFF" position
Clean the insert shank end of the accessory
to remove any debris, then lightly grease
with a light oil or lubricant.
Pull the lock bolt outward and rotate it 180˚.
Insert hex shank into the tool holder, with the
recess on the shank facing downward.
Return the lock bolt to the original position.
Pull outward on the accessory to be certain
it is locked into the tool holder.
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.
WARNING
!
with skin and use proper protective gloves or
cloth to remove.
To remove an accessory, reverse the
previous directions. All accessories should
be wiped clean after removing.
Control setting
1 - 2
(Models 11219EVS & 11233EVS only)
3
The selector lever allows the tool to be set
for various applications as listed in the
4
following chart.
5 - 6
When using demolition or chipping bits such
as bull points, chisels, spades, gouges, etc.
the "Hammer Only" mode must be selected.
Higher speeds
Smaller holes
Faster penetration
-7-
INSTALLING ACCESSORIES
REMOVING ACCESSORIES
Accessories may be hot
after use. Avoid contact
SELECTOR LEVER
= drilling/hammering: used
for solid carbide bits and
core bits.
= hammering only: used for
for chipping and demolition
work.