Slip Clutch; Tool Tips; Drilling Masonry - Bosch RH1255VC Operating/Safety Instructions Manual

160992A1RU.qxp_RH1255VC 8/27/15 10:23 AM Page 10
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
Drilling/Hammering:
used for drilling with solid
carbide bits and core bits
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.
"hammer only" setting and slightly turn the
locking sleeve to have it automatically lock
into a definite position.
Vario-Lock:
allows chisel to be set in
one of 12 positions
(right or left "0" position)
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.
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.
Use carbide-tipped SDS-plus
block, mortar, common brick, soft stone and
other materials. The amount of pressure to be
used is dependent upon the type of material
being drilled. Soft materials require less
pressure while the hard materials need more
pressure to prevent the drill bit from spinning.
-10-
Hammering Only:
used for chipping
and demolition work
CARBIDE TIPPED BITS

DRILLING MASONRY

bit for cinder
®