English - 4
Changing the Rotational Direction
Operate the rotational direction
switch 7 only at a standstill.
Set the rotational direction switch 7 to R (right-
hand rotation) or L (left-hand rotation). (When the
On/Off switch 6 is actuated, the rotational direc-
tion switch 7 is locked.)
The left-hand rotation enables screws or nuts to
be unscrewed.
Drilling and Impact Drilling
Drilling and Screwing In
Set the selector switch 3 to the “Drilling
and Screwing” symbol.
Impact Drilling
Set the selector switch 3 to the “Ham-
mer drilling” symbol.
The selector switch 3 engages noticeably and
can be actuated with the machine running.
To unscrew key chuck 1, position open-end
spanner (SW 13) on key face.
Place the chuck key in one of the 3 bores and
loosen the chuck by turning it to the left using the
key as a lever. If the key chuck is frozen in place,
a tap on the chuck key should loosen it.
The required speed depends on the material and
can be determined with practical trials.
After working with the machine for long periods at
low speed, allow it to cool by letting it run for ap-
prox. 3 minutes at maximum speed with no load.
For drilling in tiles, set the selector switch 3 to the
symbol “Drilling and Screwdriving”. Do not switch
over to the symbol “Impact Drilling” or work with
impact until after drilling through the tile.
Hard metal drills are needed for working with con-
crete, rock and brickwork.
Sharpening Drill Bits
When drilling metals, use only flawlessly sharp-
ened HSS (super-speed steel) drills. The appro-
priate quality is guaranteed by the Bosch acces-
sories program.
Twist drills from 3.5 – 10 mm can easily be sharp-
ened with the drill sharpener (see accessories).
Bench Stand
We recommend the use of a bench stand (see
accessories) especially when work demanding
more precision is required.
Machine Vise
The machine vise (available as an accessory) fa-
cilitates a safe tightening of workpieces, prevent-
ing their twisting and any accidents this would
cause.
■
Before any work on the machine itself, pull the
power plug.
■
For safe and proper working, always keep the
machine and the ventilation slots clean.
Should the machine fail in spite of careful manu-
facturing and testing, its repair should be carried
out by a Bosch power tools authorized service
agent.
For all correspondence and spare parts orders,
always include the 10-digit part number of the
machine!
Recycle raw materials instead of
disposing them as waste
The machine, its accessories and
packaging materials should be
sorted for environmentally-friendly
recycling.
These instructions are printed on chlorine-free re-
cycled paper.
The plastic components are labeled for catego-
rized recycling.
Measured values determined according to
EN 50 144.
The A-weighted noise levels of the tool are typi-
cally: Sound pressure level: a dB (A); sound
power level: b dB (A).
Wear ear protection!
The weighted acceleration is typically c m/s
2
.
Replacing the Chuck (see figure
)
Tips
B
Maintenance and Cleaning
Environmental Protection
Noise/Vibration Information
a
b
c
GSB 1000 RE
93
106
8
GSB 1300 RE
96
109
11
2 609 140 266 - Buch Seite 4 Donnerstag, 22. April 2004 8:12 08
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