-11-
Drilling only:
Drilling/hammering:
Vario-lock
Hammering only:
used for drilling
used for drilling
allows for 12 desired
used for light
wood, steel, etc.
concrete
positions of “hammer”
chipping work
FIG. 11
SELECTOR DIAL
The selector dial allows the tool to be set for
various drilling/hammer drilling and chipping
applications. Depress release button and
turn selector dial right or left depending on
the below applications (Fig. 11).
When using demolition or chipping bits such as
bull points, chisels, spades, gouges, etc. the
“Hammer Only” mode must be selected.
Do not operate the selection
dial until the tool comes to a
complete stop.
Shifting during rotation of the
chuck can cause damage to the tool.
"VARIO-LOCK"- SELECTOR DIAL
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.
Rotate the selector dial, to the “vario-lock”
setting. Next, rotate the locking sleeve,
along with the accessory, to the desired
position. Then turn the selector dial to the
“hammer only” setting and slightly turn the
locking sleeve to have it automatically lock
into a definite position.
!
CAUTION
VIBRATION DAMPER HANDLE /
HAMMER MECHANISM
The integrated vibration damper in the main
handle and hammer mechanism reduces
vibrations (Fig. 1).
SLIP CLUTCH
The tool has a internal pre-set slip clutch. The
output spindle will stop rotating if the accessory
binds and overloads the tool.
TOOL TIPS
Following a few simple tips will reduce wear
on the tool and the chance of injury to the
operator.
The high efficiency available from the BOSCH
Rotary Hammer can only be obtained if sharp
and undamaged drilling tools are used. Note
that the costs for maintaining sharp drilling
tools are more than offset by the time lost in
operating dull drilling tools.
All grease packed hammers require a short
time to warm up. Depending on the
temperature, this time will vary from
approximately 15 seconds (90° F) to 2
minutes (32° F). The tool will exert its full
power and hammering action after the heat
from impact hammering has spread, softening
the grease.
CARBIDE TIPPED BITS
Used for drilling stone, concrete, cement,
brick, cinder block and other unusually hard
non-metals. The Rotary Hammer is designed
for “SDS” Carbide Tipped Bits up to 3/4 inch
diameter.
3 JAW CHUCK
The 3 Jaw Chuck can convert your tool for
use with straight shank bits.
You will extend the life of your bits and do
neater work if you always put the bit in contact
with the workpiece BEFORE pulling the
trigger. During operation, hold the drill firmly
and exert moderate, steady pressure. Too
much pressure at low speed will stall the
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