Bosch Professional GNF 65 A Original Instructions Manual page 12

OBJ_BUCH-916-001.book Page 12 Friday, February 13, 2009 11:21 AM
12 | English
Mounting Diamond Cutting Discs
When mounting and replacing diamond cut-
ting discs, it is recommended to wear pro-
tective gloves.
Diamond cutting discs become very hot dur-
ing operation; do not touch them until they
have cooled down.
Place the power tool on its side so that the cut-
ting-depth scale 2 can be seen.
Loosen clamping lever 9 and adjust the least
cutting depth.
Dismounting the Clamping Assembly
(see figure A)
Press the spindle lock button 7 to lock the grind-
ing spindle.
Actuate the spindle lock button only when
the grinder spindle is at a standstill. Other-
wise, the machine may become damaged.
Loosen the clamping nut 19 with the two-pin
spanner 20 and unscrew the clamping nut 19.
Remove the spacer discs 18 and the mounting
flange 16.
Clean the grinder spindle 15 and all parts to be
mounted.
Determining the Slot Width
The slot width results from the amount of spac-
er discs 18 between the two diamond cutting
discs 17 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.
The allowable slot width is shown in the section
"Technical Data".
The machine can be operated with one or two
diamond cutting discs.
Mounting the Clamping Assembly
(see figure A)
Set the mounting flange 16 onto the grinder
spindle 15. The mounting flange with its driving
feature must be properly seated on the grinding
spindle.
1 609 929 N87 | (13.2.09)
Place the diamond cutting disc 17 and the spac-
er discs 18 on the mounting flange 16.
Regardless of the requested slot width, all
spacer discs 18 provided must always be
mounted. Otherwise, the diamond cutting
disc 17 can become loose during operation
and lead to injuries.
Amount of required spacer discs:
3 pce. each 4 mm thick and 4 pce., each 6 mm
thick
At least one spacer disc 18 must be mounted be-
tween two diamond cutting discs 17.
When mounting the diamond cutting discs, en-
sure that the direction-of-rotation arrows on the
diamond cutting discs match with the rotation
rotation direction of the machine (see direction-
of-rotation arrow on the gear case).
Press the spindle lock button 7 to lock the grind-
ing spindle.
Screw on the clamping nut 19 and tighten it with
the two-pin spanner 20.
When working with 2 diamond cutting discs 17,
always replace them in pairs.
See graphics page for the mounting sequence.
Note: The mounted diamond cutting discs 17
protrude out of the protection guard, even at
the least preselected cutting depth. Therefore,
never set down the machine on the chaser roll-
ers 3, but always aside.
Operation
Pre-selecting the Cutting Depth
The cutting depth may only be pre-selected
when the machine is switched off.
Loosen clamping lever 9 and adjust the desired
cutting depth according to the cutting-depth
scale 2. Afterwards, tighten clamping lever 9
again.
Bosch Power Tools