-16-
Dust Extraction
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.
Optional Bosch dust collector attachment,
GDE28D, can be used along with this rotary
h a m m e r . P l e a s e r e a d t h e G D E 2 8 D
Operating/Safety instructions for detailed
information.
Operating Instructions
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
w i t h C U T T I N G O I L f o r e a s i e r m e t a l
drilling. If bit binds, reverse the drilling
to help remove the bit from the work.
DRILLING MASONRY
U s e c a r b i d e - t i p p e d m a s o n r y b i t f o r
cinder block, mortar, common brick,
soft stone and other materials. The
a m o u n t o f p r e s s u r e t o b e u s e d i s
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.
2610056669 GBH18V-28DC 08-21_GBH18V-26D 8/30/21 9:19 AM Page 16
