Bosch Professional GGS 28 C Manual Original página 15

OBJ_BUCH-1269-006.book Page 15 Thursday, August 4, 2016 1:32 PM
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
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.
Bosch Power Tools
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.
can be used to calculate the 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.
Thumbwheel Position
1
2
3
4
5
6
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
 For safe and proper working, always keep the machine
 In extreme conditions, always use dust extraction as
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.
No-load speed (min
GGS 28 CE
GGS 28 LCE
10000
12700
16700
19700
23500
28000
plug.
and ventilation slots clean.
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.
English | 15
-1
)
GGS 8 CE
2500
3600
4600
5700
6800
8000
1 609 92A 2JZ | (4.8.16)