Bosch GBR Professional 15 CA Originalbetriebsanleitung Seite 18

OBJ_BUCH-2019-003.book Page 18 Monday, January 18, 2016 8:13 AM
18 | English
The vibration level given in this information sheet has been
measured in accordance with a standardised test given in
EN 60745 and may be used to compare one tool with anoth-
er. It may be used for a preliminary assessment of exposure.
The declared vibration emission level represents the main ap-
plications of the tool. However if the tool is used for different
applications, with different accessories or insertion tools or is
poorly maintained, the vibration emission may differ. This
may significantly increase the exposure level over the total
working period.
An estimation of the level of exposure to vibration should also
take into account the times when the tool is switched off or
when it is running but not actually doing the job. This may sig-
nificantly reduce the exposure level over the total working
period.
Identify additional safety measures to protect the operator
from the effects of vibration such as: maintain the tool and the
accessories, keep the hands warm, organisation of work pat-
terns.
Assembly
 Before any work on the machine itself, pull the mains
plug.
Inserting/Replacing Diamond Cup Wheels
(see figure A)
Approved Grinding Tools
All diamond cup wheels mentioned in these operating instruc-
tions can be used.
Observe the dimensions of the diamond cup wheels. The
mounting hole diameter must fit the mounting flange without
play. The mounting hole of the diamond cup wheel may not be
increased. Do not use reducers or adapters.
The permissible speed [rpm] or the circumferential speed
[m/s] of the diamond cup wheels used must at least match
the values given in the table.
Therefore, observe the permissible rotational/circumferen-
tial speed on the label of the diamond cup wheel.
max.
[mm] [mm]
D
d
125 22.2
D
Inserting Diamond Cup Wheels
Select a suitable diamond cup wheel for the material to be
worked. Please also observe the material information on the
packaging of the diamond cup wheel.
Clean the grinder spindle 13 and all parts to be mounted.
Place the mounting flange 14 on the grinder spindle 13 so
that the centring collar faces away from the machine. The
mounting flange must engage on the flats of the grinder spin-
dle (anti-twist protection).
1 609 92A 287 | (18.1.16)
Place the diamond cup wheel 15 on the mounting flange 14.
Pay attention that the direction-of-rotation arrow on the dia-
mond cup wheel agrees with the direction-of-rotation arrow
on the guard and extraction hood 3.
Press the spindle lock button 9 to lock the grinding spindle.
Screw on the clamping nut 16 and tighten it with the two-pin
spanner 18.
Pay attention that the collar of the clamping nut 16 faces away
from the machine, as shown in the figure.
 After mounting the diamond cup wheel and before
Changing a Diamond Cup Wheel
When transporting the machine, the diamond cup wheel 15
should be removed to avoid damage to it.
 Do not touch diamond cup wheels before they have
Press the spindle lock button 9 to lock the grinding spindle.
 Actuate the spindle lock button only when the grinder
Loosen the clamping nut 16 with the two-pin spanner 18 and
unscrew the clamping nut. Remove the diamond cup wheel 15.
Quick-clamping Nut
For convenient changing of grinding tools without the use of
additional tools, you can use the quick-clamping nut 17 in-
stead of the clamping nut 16.
 Use only a flawless, undamaged quick-clamping nut 17.
 When screwing on, pay attention that the side of the
-1
d [min ] [m/s]
11000 80
nut with pliers. Always use the two-pin spanner 18.
A plastic part (O-ring) is fitted around
the centring collar of mounting flange
14. If the O-ring is missing or dam-
aged, the mounting flange 14 must be
replaced before resuming operation.
switching on, check that the diamond cup wheel is cor-
rectly mounted and that it can turn freely. Make sure
that the diamond cup wheel does not graze against the
guard and extraction hood or other parts.
cooled. Diamond cup wheels become very hot while working.
spindle is at a standstill. Otherwise, the machine may be-
come damaged.
quick-clamping nut 17 with printing does not face the
diamond cutting disc; the arrow must point to the index
mark 19.
Lock the grinder spindle
with the spindle lock button
19 17
9. To tighten the quick-
clamping nut, firmly turn
the diamond wheel disc in
clockwise direction.
A properly attached, un-
damaged quick-clamping
nut can be loosened by
hand when turning the
knurled ring in anticlock-
wise direction. Never loos-
en a tight quick-clamping
Bosch Power Tools