Bosch GEX12V-5 Instrucciones De Funcionamiento Y Seguridad página 13

Selecting Sanding Discs
Open-coat aluminum oxide sanding discs are
recommended for most wood or metal
sanding applications, as this synthetic
material cuts quickly and wears well. Some
applications, such as plastics, glass, or stone
require silicon carbide discs, which have a
very sharp cutting edge. For best results, use
Bosch sanding and polishing accessories,
which are of superior quality and are carefully
selected to produce professional quality
results with your sander.
An alternative to standard sanding discs is to
use a SandNet™ connection pad and
SandNet™ mesh sanding discs.
Start of Sanding
With the workpiece firmly secured, first place
the sander's pad on the work surface, then
switch the tool on.
DO NOT start the tool and bring it up to
speed before applying to the work
DO NOT apply excessive pressure when
switch the tool on (or at any other time)
Either method will likely create swirl marks.
Applying excessive pressure upon start-up
will also shorten the life of the switch.
Sanding Action
In general, higher speeds will give the best
results. If faster removal is desired, DO NOT
APPLY PRESSURE ON THE TOOL; use a
coarser grade of abrasive. Move the sander
in long sweeping strokes, parallel to the grain
using some lateral motion to overlap the
strokes by as much as 75%. The random orbit
action allows cross-grain sanding, but be
careful not to tilt the sander near edges, or
undesirable rounding may result.
Sanding Sequence
If the surface is rough, begin with coarser
grits and then complete the surfacing with
medium and fine abrasives. Because the
random orbit action is so effective, it is often
possible to begin sanding with a medium grit
Tool Tips
disc and go directly to fine finishing. To avoid
uneven results, do not skip more than one
grit size when going from coarser to finer,
and do not sand in one area for too long.
Removal of Sander
To help prevent swirl marks when the job is
completed, gently lift the tool from the work
surface, then switch the tool off. Operating in
this manner will also prolong the switch life.
Polishing
For most polishing, the medium backing pad
will give the best results. The random orbit
sander may be fitted with an optional foam
buffing pad or polishing bonnet to polish or
remove scratches from painted or finished
surfaces, plastics, and even glass. The tool is
operated in much the same way as when
sanding, but the following points should be
observed;
Apply the compound to the surface, and use
the sponge applicator pad with light pressure
and a circular motion to remove scratches
and restore weathered finishes. Use only as
much compound as necessary, and clean the
sponge frequently during use.
When initial polishing is completed, wipe
away any excess compound with a soft towel,
and then polish the surface to its final finish
with the polishing bonnet. Use smooth
overlapping strokes for best results.
It is important to note that the orbit speed of
the random orbit sander is not the same as
the RPM of a standard right-angle polisher.
The random orbit action is much like a
powerful hand polishing action, and therefore
does not have the high speeds at the edge of
the pad which can burn the work surface. For
this reason, it is possible to select a higher
OPM for the random orbit sander than the
recommended RPM for a standard polisher.
Practice on a hidden area or test surface until
you have determined the tool is suitable for
your polishing application.
Clean the buffing pad and polishing bonnet
with mild detergents and warm water. DO
NOT use solvents.
-13-