Turn the selector lever, to the “vario-lock”
setting. Next, rotate the locking sleeve,
along with the accessory, to the desired
position. Then turn the selector lever to the
“hammer only” setting and slightly turn the
locking sleeve to have it automatically lock
into a definite position.
-10-
Drilling/Hammering:
used for drilling with solid
carbide bits and core bits
Hammering Only:
used for chipping
and demolition work
Vario-Lock:
allows chisel to be set in
one of 12 positions
(right or left “0” position)
FIG. 4
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
The rotary hammer is designed to use SDS-
Max® carbide tipped bits for drilling into stone,
concrete, cement, brick, cinder block, mortar,
soft stone and other unusually hard non-metal
materials.
The amount of pressure to be used is
dependent upon the type of material being
drilled. Soft materials require less pressure;
while hard materials require more pressure.
BM 160992A0H1 01-14_RH745 RH850VC 1/22/14 10:22 AM Page 10
