Dust/Chip Extraction; Starting Operation - Bosch GSH Professional 16-28 Originalbetriebsanleitung

OBJ_BUCH-229-004.book Page 17 Thursday, December 16, 2010 10:48 AM
Pull out the lock bolt 5 and turn it 180° in anti-
clockwise direction. Allow the lock bolt 5 to
latch again.
Insert the tool into the tool holder 8 to the stop.
The groove of the tool shank 7 must face upward
as shown in the figure.
Pull out the lock bolt 5 and turn it 180° in clock-
wise direction. Allow the lock bolt 5 to latch
again.
Check the latching by pulling the tool.

Dust/Chip Extraction

Dusts from materials such as lead-containing
coatings, some wood types, minerals and
metal can be harmful to one's health. Touch-
ing or breathing-in the dusts can cause aller-
gic reactions and/or lead to respiratory infec-
tions of the user or bystanders.
Certain dusts, such as oak or beech dust, are
considered as carcinogenic, especially in
connection with wood-treatment additives
(chromate, wood preservative). Materials
containing asbestos may only be worked by
specialists.
– Provide for good ventilation of the work-
ing place.
– It is recommended to wear a P2 filter-
class respirator.
Observe the relevant regulations in your
country for the materials to be worked.
Operation

Starting Operation

Observe correct mains voltage! The voltage
of the power source must agree with the
voltage specified on the nameplate of the
machine. Power tools marked with 230 V
can also be operated with 220 V.
Switching On and Off
To start the machine, push the On/Off switch 2
to the "I" position.
To switch off the machine, push the On/Off
switch 2 to the "0" position.
Bosch Power Tools
For low temperatures, the machine reaches the
full impact rate only after a certain time.
This start-up time can be shortened by striking
the chisel in the machine against the floor one
time.
Working Advice (see figure G)
While working, hold the power tool with both
hands by the handle 1. The handle 1 can move
upward and downward around its axis by ap-
prox. 30 mm. This has a damping effect against
vibrations.
For the highest possible impact damping, work
only with moderate pressure.
Sharpening Chisels
Good results are only achieved with sharp chis-
els; therefore, sharpen the chiselling tools in
good time. This ensures a long service life of the
tools and good working performance.
Re-sharpening
Sharpen chiselling tools using grinding wheels
(e. g. ceramic bonded corundum wheel) with a
steady supply of water. Reference values are
shown in the figure. Take care that no annealing
coloration appears on the cutting edges; this im-
pairs the hardness of the chiselling tools.
60
4
60
20
For forging, heat the chisel to between 850 and
1050 °C (bright red to yellow).
For hardening, heat the chisel to approx.
900 °C and quench in oil. Then anneal in an ov-
en for approx. one hour at 320 °C (annealing
colour = light blue).
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