Bosch GNF 20 CA Instrucciones De Servicio página 15

Changing the Tool
Before any work on the machine itself, pull
the mains plug.
Wear protective gloves.
Use only diamond cutting discs suitable for
dry cutting of the material with an allowable
speed matching at least the no-load speed
of the machine.
Swiveling out the cutting unit
For tool change, the cutting unit must be swiveled
out completely.
Place the machine on a firm surface. Turn the re-
lease lock 1 to the left, using e. g. the spanner
end of the two-pin spanner 19.
This releases the cutting unit and imme-
diately swivels it upwards by means of
resiliance.
Removing the clamping assembly
A
With the spindle locking button 7, lock the grinder
spindle (only when the grinder spindle is at a
standstill!).
Loosen the clamping nut 18 using the two-pin
spanner 19 and unscrew it. Remove the spacer
discs 17 and the mounting flange and clean the
clamping parts.
Determining the slot width
The slot width results from the amount of spacer
discs between the two diamond cutting discs 16
and the cutting width of the diamond cutting
discs.
The slot width is calculated as follows:
Slot width = Thickness of the spacer discs + width
of the diamond cutting discs (4 mm).
The allowable slot width is shown in the section
"Tool Specifications".
The machine may only be operated with one or
two diamond cutting discs.
15 • 3 609 929 804 • TMS • 19.04.01
Mounting the clamping assembly
A
Place the mounting flange 15 onto the tool spin-
dle 14. The mounting flange 15 with its driving
feature must be properly seated on the tool spin-
dle.
Place the diamond cutting disc 16 and the spacer
discs 17 on the mounting flange 15.
Regardless of the required slot width, all spacer
discs 17 included in the delivery must be
mounted.
At least one spacer disc 17 must be mounted be-
tween two diamond cutting discs 16.
When assembling the diamond cutting discs, en-
sure that the direction-of-rotation arrows on the
diamond cutting discs match with the direc-
tion-of-rotation arrow on the housing.
Screw on the clamping nut 18 and tighten with
the two-pin spanner 19.
Swivel the cutting unit back again. Check the
locking system of the cutting unit.
When working with 2 diamond cutting discs
always replace them in pairs.
Cutting Depth Pre-Selection
Press the release button 4 at the depth stop 5
and push the depth stop to the required cutting
depth. The cutting depth scale 3 can be used as
a reference for this.
Let go of the release button 4 again.
Ensure that the depth stop 5 is engaged.
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