Drilling Metal; Drilling Masonry; Dust Extraction - Bosch Bulldog GBH18V-28DC Operating/Safety Instructions Manual

2610056669 GBH18V-28DC 08-21_GBH18V-26D 8/30/21 9:19 AM Page 16

DRILLING METAL

Make a center punch in the material for
easier starting. Use enough pressure to
keep the bit cutting. If the bit is allowed
to merely spin in the hole, it will become
dull within a short time. When drilling a
larger hole, it is faster and easier on
your power pack to first make a smaller
hole and enlarge it to the required size.
Lubricate the tip of the bit occasionally
with CUTTING OIL for easier metal
drilling. If bit binds, reverse the drilling
to help remove the bit from the work.
For selection of dust collection systems and
operating instructions, see the Operating /
Safety Instructions for 'Dust Extraction
Attachments for Hammers and Hammer
Drills' included with your tool or with the
dust extraction attachment.
Operating Instructions

DRILLING MASONRY

Dust Extraction

Optional Bosch dust collector attachment,
GDE28D, can be used along with this rotary
hammer.
Operating/Safety instructions for detailed
information.
-16-
Use carbide-tipped masonry bit for
cinder 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.
Please read the GDE28D