Starting Operation; Working Advice - Bosch GDA 280 E Professional Manual De Instrucciones

OBJ_BUCH-428-004.book Page 13 Monday, December 2, 2013 8:47 AM
Position the sanding sheet 4 flush alongside one edge of the
sanding plate 5, then lay the sanding sheet onto the sanding
plate and press firmly.
To remove the sanding sheet 4, grasp it at one of the tips and
pull it off from the sanding plate 5.
Sanding accessories, such as fleece pads/polishing cloth
pads, are attached to the sanding plate in the same manner.
Selecting the Sanding Sheet
Depending on the material to be worked and the required rate
of material removal, different sanding sheets are available:
For the working of all wooden
materials
For coarse-sanding, e. g. of rough,
unplaned beams and boards
For face sanding and planing small
irregularities
For finish and fine sanding of hard
woods
For the working of paint/enamel
coats or primers and fillers
For sanding off paint
For sanding primer
For final sanding of primers before
coating
For reworking or polishing, especially of metal and stone, use
fleece/polishing cloth pad.
Depending on the desired surface quality of the workpiece,
different fleece types or polishing cloth pads are to be used.
Replacing the Sanding Plate (see figure C)
 Slide the SDS button for release of the sanding plate 6 all
the way to the right.
 Remove the sanding plate 5.
 Guide the sanding plate 5 from below against the sand-
ing plate holder and firmly press them together.
 Slide the SDS button for release of the sanding plate 6 all
the way to the left.
If, e. g., the front tip of the sanding sheet is worn, you can also
remove the complete sanding plate and reattach it turned by
120°.
Specialty Sanding Plates
You can replace the supplied sanding plate 5 with a specialty
sanding plate, which is available as an accessory.
The specialty sanding plate is attached in the same manner as
the one supplied.
Attach and remove the respective sanding sheets in the same
manner as when changing original sanding sheets.
Bosch Power Tools
Pad Extender (see figure D)
With the pad extender 9 you can sand surfaces that are diffi-
cult to access, such as sills on windows, cabinets or doors.
Pad Extender, Narrow (see figure E)
With the narrow pad extender 11 you can sand narrow open-
ings, slots and passages.
Pad Extender, Narrow Rounded (see figure F)
The narrow rounded pad extender 12 allows you to sand
curved and hollow areas or surfaces that are curved inward,
such as on furniture, rails or heating radiators.
Grain size
Operation
40 –400

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
coarse 40, 60
230 V can also be operated with 220 V.
80, 100,
Switching On and Off
medium 120
To start the machine, push the On/Off switch 1 towards the
180, 240,
front to "I".
fine 320, 400
To switch off the machine, push the On/Off switch 1 towards
40 –320
the rear to "0".
To save energy, only switch the power tool on when using it.
Preselecting the Orbital Stroke Rate
coarse 40, 60
With the thumbwheel for preselection of the orbital stroke
80, 100,
rate 2, you can preselect the required orbital stroke rate, even
medium 120
during operation.
180, 240,
The required stroke rate depends on the material and the
fine 320
working conditions and can be determined through practical
testing.

Working Advice

 Wait until the machine has come to a standstill before
placing it down.
The removal capacity during sanding is mainly determined by
the selection of the sanding sheet as well as the preselected
orbital stroke rate.
Only flawless sanding sheets achieve good sanding capacity
and extend the service life of the machine.
Pay attention to apply uniform sanding pressure; this increas-
es the working life of the sanding sheets.
Intensifiying the sanding pressure does not lead to an in-
crease of the sanding capacity, but to increased wear of the
machine and the sanding sheet.
For precise on-the-spot sanding of edges, corners and hard to
reach areas, it is also possible to work only with the tip or an
edge of the sanding plate.
A sanding sheet that has been used for metal should not be
used for other materials.
Use only original Bosch sanding accessories.
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