Bosch GEX12V-5 Operating/Safety Instructions Manual page 9

Backing Pad Installation
The random orbit sander is equipped with a
backing pad of medium hardness, which is
suitable for general service. Hard and soft
pads are available for other purposes, and in
general are used as follows;
Soft pad - Polishing or sanding large or
curved surfaces.
Medium pad - All purpose general sanding
and polishing.
Hard pad - Heavy sanding on flat surfaces,
especially with coarser abrasives.
To change backing pad, hold pad firmly and
remove the four screws that secure the
backing pad (using a T20 bit) and remove old
pad. Align new pad over bearing flange cover
and locating pins on drive spindle, replace
screws and securely tighten. Damaged or
worn backing pads must be replaced
immediately (Fig. 2).
SCREWS
BACKING
PAD
BEARING
FLANGE COVER
LOCATING
PINS
Assembly
Installing Accessories
The random orbit sander uses hook-and-loop
backed accessories, which firmly grip the pad
when applied with moderate pressure. To
change the accessory, merely peel off the old
accessory, remove dust from the pad if
necessary, and press the new accessory in
place (Fig. 3). Be sure to align the sanding
disc holes with the holes in the backing pad
to allow the dust extraction system to
function.
SANDING
DISC
BACKING
PAD
FIG. 2
After considerable service the pad surface
will become worn, and the pad must be
replaced when it no longer offers a firm grip.
If you are experiencing premature wearout of
the pad hooks, it may be due to pressure
being applied to the tool during operation.
PSA Backing Pad
Accessories
The optional RS036 soft PSA backing pad can
be used with PSA backed accessories with
pressure sensitive adhesive.
To change accessory, peel protective sheet
from the back of accessory. Align accessory
with backing pad and press firmly in place. To
remove, lift an edge of accessory with your
finger nail and peel it off the backing pad.
NOTE: Do not store tool with sanding disc on
pad, as sanding creates heat which increases
the adhesive bond. If the disc is left in place it
may become very difficult to remove.
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FIG. 3