Bosch HEAVY DUTY GWG 12V-50 S Professional Manual Original página 17

Only use brand accessories for grinding from the
u
dealer for the power tool which are approved for a
minimum speed of 16,000 min
imum diameter of 50 mm and are held by a backing
pad, which also has a maximum diameter of 50 mm
and which has a straight shank with a diameter of
6 mm, 1/4" or 8 mm.
– Clean the grinding spindle (9) and all the parts to be fit-
ted.
– To release the collet (16), push the spindle lock (8) for-
wards.
– Loosen the clamping nut (10) by placing an open-ended
spanner (14) on the spanner flat and turning it anticlock-
wise.
– Insert the straight shank of the backing pad (11) all the
way into the collet (16).
– Firmly clamp the backing pad (11) by turning the clamp-
ing nut (10) clockwise with the open-ended
spanner (14).
– Fit the disc (12) on the backing pad (11).
– Then push the spindle lock (8) back again.
The grinding tools must run completely concentrically. Do
not continue to use damaged grinding tools that are out of
balance. If the grinding tools are out of balance, they should
be replaced.
Do not, under any circumstances, tighten the collet
u
with the clamping nut until a grinding tool has been
fitted. The collet may otherwise become damaged.
Only use backing pads with an appropriate shank dia-
u
meter. A backing pad with a shank diameter which does
not correspond to the tool holder of the power tool (see
"Technical Data") cannot be held properly and will dam-
age the collet chuck.
The application tool must be clamped at least 10 mm.
u
The inner shank dimension L
0
maximum permitted speed of the application tool from
the specifications provided by the manufacturer of the
application tool. It must not be less than the maximum
speed of the power tool.
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 carci-
nogenic, especially in connection with wood-treatment ad-
Paint State
White Continuous light
(1 x to 5 x)
Green Continuous light
(2 x to 5 x)
Yellow Continuous light
(1 x)
Bosch Power Tools
–1
, which have a max-
can be used to calculate the
Meaning/cause
Speed preselection
Battery charged
Battery almost empty (see "Battery charge
indicator", page 16)
ditives (chromate, wood preservative). Materials containing
asbestos may only be worked by specialists.
– 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 ma-
terials to be worked.
Avoid dust accumulation at the workplace. Dust can
u
easily ignite.
Operation
Starting operation
Switching On and Off
To start the power tool, push the unlocking lever (6) for-
wards and then push the on/off switch (7) up.
To switch off the power tool, release the on/off switch (7).
Speed preselection (see figure B)
You can preselect the required speed using the two buttons
for speed preselection (3), even during operation. The re-
quired speed depends on the material and the working con-
ditions; it can be ascertained through practical tests.
LEDs
1 x continuous white light
2 x continuous white light
3 x continuous white light
4 x continuous white light
5 x continuous white light
The rated speed of the accessory must be at least
u
equal to the maximum speed marked on the power
tool. Accessories running faster than their rated speed
can break and fly apart.
LED Displays (see figure B)
The following table explains the possible LED displays (2).
Solution
(see "Speed preselection (see figure B)",
page 17)
(see "Battery charge indicator", page 16)
Replace or charge battery soon
English | 17
-1
[min ]
5000
7500
10,000
12500
15000
1 609 92A 8HB | (21.12.2022)