Maintenance And Cleaning - Bosch GSB 20-2 PROFESSIONAL Bedienungsanleitung

Tips
The required speed is dependent on the material
and can be determined by practical testing.
After longer periods of working at low speed, al-
low the machine to cool down by running it for ap-
prox. 3 minutes at maximum speed with no load.
For drilling in tiles, set the selector switch 2 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.
Carbide tipped drill bits are required for jobs
when working in concrete, masonry and brick
wall.
Sharpening Drill Bits
For drilling in metal, use only perfectly sharpened
HSS drills. The appropriate quality is guaranteed
by the Bosch accessories program.
Twist drills from 2.5 – 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) for work where greater precision is
particularly required.
Machine Vise
The machine vise can be obtained as an acces-
sory and clamps workpieces tightly for drilling.
This prevents the workpiece from turning and any
accidents this would cause.
16 • 2 609 932 256 • 03.10

Maintenance and Cleaning

Before any work on the machine itself, pull
the mains plug.
For safe and proper working, always keep
the machine and the ventilation slots clean.
If the machine should fail despite the care taken
in manufacturing and testing procedures, repair
should be carried out by an after-sales service
centre for Bosch power tools.
In all correspondence and spare parts orders,
please always include the 10-digit order number
given on the nameplate of the machine.
WARNING! Important instructions for con-
necting a new 3-pin plug to the 2-wire cable.
The wires in the cable are coloured according to
the following code:
strain relief
live = brown
neutral = blue
Do not connect the blue or brown wire to the
earth terminal of the plug.
Important: If for any reason the moulded plug is
removed from the cable of this machine, it must
be disposed of safely.
English - 5
To be fitted
by qualified
professional only