Bosch GBG 6 Professional - Manual (Page 14)

14 | English
1 619 929 L57 | (13.7.12) Bosch Power Tools
Noise Information
Measured sound values determined according to EN 61029.
Typically the A-weighted sound pressure level of the product
is less than 70 dB(A). Uncertainty K =3 dB.
The noise level when working can exceed 80 dB(A).
Wear hearing protection!
Declaration of Conformity
We declare under our sole responsibility that the product de-
scribed under “Technical Data” is in conformity with the fol-
lowing standards or standardization documents: EN 61029
according to the provisions of the directives 2011/65/EU,
2004/108/EC, 2006/42/EC.
Technical file (2006/42/EC) at:
Robert Bosch GmbH, PT/ETM9,
D-70745 Leinfelden-Echterdingen
Robert Bosch GmbH, Power Tools Division
D-70745 Leinfelden-Echterdingen
26.06.2012
Assembly
f Before any work on the machine itself, pull the mains
plug.
Bolt the machine to a workbench/bench top with suitable
screws via the 4 holes intended for this.
Mounting the Spark Guard/Workpiece Support
(see figures A – D)
f Use the machine only with the spark guard 10. Sparks
being expelled can injure your eyes or set objects in the vi-
cinity on fire.
Mount the holder for the spark guard 9 with the two screws.
Screw the spark guard 10 to the holder of the spark guard 9.
Mount the workpiece support 11 as shown in the figure.
f
Do not interchange the right and left workpiece sup-
port 11. Otherwise, the clearance between workpiece
support 11 and grinding wheel will be too large. When the
clearance is larger, you are not sufficiently protected
against sparking. The workpiece can be drawn in by the ro-
tational motion of the grinding wheel and lead to injuries.
f Regularly check the clearance between the workpiece
support 11 as well as the holder of the spark guard 9 to
the grinding wheel, and readjust as required. The clear-
ance to the grinding wheel may not exceed 2 mm. When
the clearance is larger, you are not sufficiently protected
against sparking. The workpiece can be drawn in by the ro-
tational motion of the grinding wheel and lead to injuries.
Replace the grinding wheel when the holder of the spark
guard 9 can no longer be adjusted to the required clearance of
2 mm (max.) to the grinding wheel.
Changing a Grinding Wheel
f The rated speed of the accessory must be at least equal
to the maximum speed marked on the power tool. Ac-
cessories running faster than their rated speed can break
and fly apart.
Replace the grinding wheel as soon as its residual material
reaches a thickness of 10 mm.
Loosen the 3 screws of cover 1 and remove cover 1. Hold the
grinder spindle 5 by the spanner flats 12 with the supplied
open-end spanner 13 and unscrew the clamping nut 2.
Note: The grinder spindle 5 on the left side of the machine has
a left-hand thread.
Remove the clamping flange 3 and the grinding wheel from
the grinder spindle 5.
The new grinding wheel is mounted in reverse order. Place the
cover 1 firmly onto the housing and tighten with the 3 screws.
Dress used and out-of-centre grinding wheels with a whet-
stone (accessory) before continuing to use them.
Dust/Chip Extraction
f Dusts 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 dusts can cause
allergic reactions and/or lead to respiratory infections of
the user or bystanders.
Certain dusts, such as oak or beech dust, are considered
as carcinogenic, especially in connection with wood-treat-
ment additives (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
materials to be worked.
f Prevent dust accumulation at the workplace. Dusts can
easily ignite.
Operation
Starting Operation
f 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.
f Check the grinding tools before using. The grinding
tools must be properly mounted and must rotate freely.
Carry out a 1 minute (minimum) test run at maximum
speed in a safe environment with no load. Do not use
damaged, out-of-centre or vibrating grinding tools.
Damaged grinding tools can burst and cause injuries.
Switching On and Off
To start the machine, push the On/Off switch 8 to the “I” po-
sition.
To switch off the machine, push the On/Off switch 8 to the
“0” position.
When not using the power tool, switch it off in order to save
energy.
Dr. Egbert Schneider
Senior Vice President
Engineering
Helmut Heinzelmann
Head of Product Certification
PT/ETM9
OBJ_BUCH-1501-003.book Page 14 Friday, July 13, 2012 8:00 AM