Changing The Tool; Starting Operation - Bosch GSH 11 E PROFESSIONAL Instrucciones De Servicio

OBJ_BUCH-1 619 929 697-002.book Page 4 Thursday, January 12, 2006 11:39 AM
The auxiliary handle 7 can be mounted to a different
position. For this, completely unscrew the knurled nut 8
and then pull out the hexagon bolt upward. Pull off the
auxiliary handle 7 to the side and turn around the
remaining clamping element by 180°. Mount the auxil-
iary handle 7 in reverse order.

Changing the Tool

Before any work on the machine itself, pull the
mains plug.
With the SDS-max tool holder, simpler and easier tool
changing is possible without additional aids.
The dust protection cap 1 largely prevents the entry of
drilling dust into the tool holder during operation. When
inserting the tool, take care that the dust protection cap
1 is not damaged.
A damaged dust protection cap should be
changed immediately. We recommend having this
carried out by an after-sales service.
Inserting (see figure A)
Clean and lightly grease the shank end of the tool.
Insert the tool in a twisting manner into the tool holder
until it latches itself.
Check the loatching by pulling the tool.
Removing (see figure B)
Push back the locking sleeve 2 and remove the tool.
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 4 to the
right.
To switch off the machine, push the On/Off switch 4
to the left.
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.
1 619 929 697 • 12.1.06
Setting the Impact Rate
The electronic control enables stepless speed prese-
lection in accordance with the material to be worked.
The constant electronic control keeps the preselected
impact rate nearly constant between no-load and load
conditions.
Select the impact rate with the thumbwheel 5 accord-
ing to the material.
The data in the following table are recommended val-
ues.
Thumbwheel Position 5 Impact Rate (bpm)
1
2
3
4
5
6
Changing the Chiselling Position (Vario-lock)
The chisel can be locked in 12 positions. In this man-
ner, the optimum working position can be set for each
application.
Insert the chisel into the tool holder.
Push the chisel adjustment ring 3 forward and turn the
chisel to the required position with the chisel adjust-
ment ring 3.
Release the chisel adjustment ring 3 and turn the chisel
until it latches.
Operating Instructions
Sharpening Chisels (see figure C)
Good results are only achieved with sharp chisels;
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 impairs the hardness of the chisel-
ling tools.
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 oven for approx. one
hour at 320 °C (annealing colour = light blue).
English–4
1030
1180
1360
1540
1720
1900