operation manual

English | 21
Bosch Power Tools 1 609 92A 1CR | (2.11.15)
Rubber Sanding Plate
 For operations with the rubber sanding plate 17, al-
ways mount the hand guard 16.
See graphics page for the mounting sequence.
Screw on round nut 19 and tighten it with the combination
spanner 4/5.
Cup Brush/Disc Brush
 For operations with the cup brush/wheel brush, always
mount the hand guard 16.
See graphics page for the mounting sequence.
The cup brush/disc brush must be able to be screwed onto
the grinder spindle until it rests firmly against the grinder
spindle flange at the end of the grinder spindle threads. Tight-
en the cup brush/disc brush with an open-end spanner.
Quick-clamping Nut
For convenient changing of grinding tools without the use of
additional tools, you can use the quick-clamping nut 12 in-
stead of the clamping nut 11.
 The quick-clamping nut 12 may be used only for grind-
ing or cutting discs.
Use only a flawless, undamaged quick-clamping nut 12.
When screwing on, pay attention that the side of the
quick-clamping nut 12 with printing does not face the
grinding disc; the arrow must point to the index mark 23.
Lock the grinder spindle with
the spindle lock button 1. To
tighten the quick-clamping
nut, firmly turn the grinding
disc in clockwise direction.
A properly fastened, undam-
aged quick-clamping nut can
be manually loosened by
turning the knurled ring in an-
ticlockwise direction.
Never loosen a tight quick-
clamping nut using pliers;
always use the combination
spanner. Apply the combina-
tion spanner 4/5 as shown in
the figure.
Approved Grinding Tools
All grinding tools mentioned in these operating instructions
can be used.
The permissible speed [min
-1
] or the circumferential speed
[m/s] of the grinding tools used must at least match the values
given in the table.
Therefore, observe the permissible rotational/circumferen-
tial speed on the label of the grinding tool.
Rotating the Machine Head
 Before any work on the machine itself, pull the mains
plug.
The machine head can be
rotated with respect to
the machine housing in
90° steps. In this man-
ner, the On/Off switch
can be brought into a
more convenient posi-
tion for special working
situations, e.g. for left-
handed persons.
Completely unscrew the
four screws. Rotate the
machine head carefully,
without removing it from the housing, to the new position.
Screw in and tighten the four screws again.
Dust/Chip Extraction
 Dust from materials such as lead-containing coatings,
some wood types, minerals and metal can be harmful to
one’s health. Touching or breathing-in the dust can cause
allergic reactions and/or lead to respiratory infections of
the user or bystanders.
Certain dust, such as oak or beech dust, is considered car-
cinogenic, especially in connection with wood-treatment
additives (chromate, wood preservative). Materials con-
taining asbestos may only be worked by specialists.
– As far as possible, use a dust extraction system suitable
for the material.
– Provide for good ventilation of the working place.
– It is recommended to wear a P2 filter-class respirator.
Observe the relevant regulations in your country for the
materials to be worked.
 Prevent dust accumulation at the workplace. Dust can
easily ignite.
23
max.
[mm]
[mm]
D b d [min
-1
] [m/s]
100
115
125
7
7
7
16.0
22.2
22.2
11000
11000
11000
80
80
80
100
115
125
–
–
–
–
–
–
11000
11000
11000
80
80
80
70
75
30
30
M10
M14
11000
11000
45
45
b
d
D
D
D
b
d
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