English |
15
Bosch Power Tools
1 609 92A 2JZ | (4.8.16)
The grinding tools must run completely concentrical. Do not
continue to use out-of-round grinding accessories, instead,
replace before continuing to work.
Do not tighten the collet chuck of the clamping nut as
long as no grinding accessory is mounted.
Otherwise,
the collet chuck can become damaged.
Only use grinding points with a matching shank diame-
ter.
A grinding point/accessory with a shank diameter that
does not fit the tool holder (see “Technical Data”), can not
be clamped properly and will damage the collet chuck.
The application tool must be clamped at least 10 mm.
The inner shank dimension L
0
can be used to calculate the
maximum permitted speed of the application tool from the
specifications provided by 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 car-
cinogenic, especially in connection with wood-treatment
additives (chromate, wood preservative). Materials con-
taining 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
materials to be worked.
Prevent dust accumulation at the workplace.
Dust can
easily ignite.
Operation
Starting Operation
Observe correct mains voltage! The voltage of the pow-
er source must agree with the voltage specified on the
nameplate of the machine. Power tools marked with
230 V can also be operated with 220 V.
Starting and Stopping (GGS 8 CE/GGS 28 C/
GGS 28 CE/GGS 28 LC/GGS 28 LCE)
To
start
the power tool, push the On/Off switch
5
forwards.
To
lock
the On/Off switch
5
, press the On/Off switch
5
down
at the front until it latches.
To
switch off
the power tool, release the On/Off switch
5
or,
if it is locked, briefly push down the back of the On/Off switch
5
and then release it.
To save energy, only switch the power tool on when using it.
Kickback stop
In case of a sudden drop in speed, e.g., caused by a jammed
disc while cutting, the power supply to the motor is electroni-
cally interrupted.
To
restart the operation
, switch the On/Off switch
5
to the
Off position and start the machine again.
Starting and Stopping (GGS 28 LP)
To
start
the power tool,
first
slide the lock-off button
12
backwards and
then
press the On/Off switch
11
and keep it
pressed.
To
switch off
the power tool, release the On/Off switch
11
.
To save energy, only switch the power tool on when using it.
Constant Electronic Control
Constant electronic control holds the speed constant at no-
load and under load, and ensures uniform working perfor-
mance.
Speed preselection (GGS 8 CE/GGS 28 CE/GGS 28 LCE)
The required speed can be preselected with the thumbwheel
6
(also while running).
The required speed depends on the material being worked
and the diameter of the application tool. Observe the maximal
allowable speed of the application tool.
Working Advice
Optimum grinding results are achieved when the grinding tool
is moved uniformly back and forth with light pressure. Pres-
sure that is too strong reduces the performance capability of
the machine and causes the grinding tool to wear more quick-
ly.
Protect the abrasive wheels from impacts.
Maintenance and Service
Maintenance and Cleaning
Before any work on the machine itself, pull the mains
plug.
For safe and proper working, always keep the machine
and ventilation slots clean.
In extreme conditions, always use dust extraction as
far as possible. Blow out ventilation slots frequently
and install a portable residual current device (PRCD).
When working metals, conductive dust can settle in the in-
terior of the power tool. The total insulation of the power
tool can be impaired.
Please store and handle the accessory(-ies) carefully.
If the replacement of the supply cord is necessary, this has to
be done by Bosch or an authorized Bosch service agent in or-
der to avoid a safety hazard.
Thumbwheel Position
No-load speed (min
-1
)
GGS 28 CE
GGS 28 LCE
GGS 8 CE
1
10000
2500
2
12700
3600
3
16700
4600
4
19700
5700
5
23500
6800
6
28000
8000
OBJ_BUCH-1269-006.book Page 15 Thursday, August 4, 2016 1:32 PM
