Bosch Professional GWS 750 Manual Original página 20

OBJ_BUCH-2565-001.book Page 21 Monday, November 2, 2015 2:38 PM
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
23
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.
-1
The permissible speed [min ] or the circumferential speed
[m/s] of the grinding tools used must at least match the values
given in the table.
Bosch Power Tools
Therefore, observe the permissible rotational/circumferen-
tial speed on the label of the grinding tool.
max.
[mm] [mm]
D b
d
100 7 16.0
115 7 22.2
D
125 7 22.2
b
100 –
D
115 –
125 –
d
70 30 M 10
b
75 30 M 14
D
Rotating the Machine Head
 Before any work on the machine itself, pull the mains
plug.
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.
English | 21
-1
d [min ] [m/s]
11000 80
11000 80
11000 80
– 11000 80
– 11000 80
– 11000 80
11000 45
11000 45
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,
1 609 92A 1CR | (2.11.15)