Ryobi OSS500 - Manual (Page 9)

9
ADJUSTMENTS
WARNING:
The sander should never be connected to a power
supply when you are assembling parts, making ad-
justments, cleaning, or when not in use. Disconnect-
ing the tool will prevent accidental starting that could
cause serious personal injury.
SELECTING SANDING SLEEVES
Selecting the correct size diameter, correct size grit, and
correct type sanding sleeve is an extremely important
step in achieving a high quality sanded finish. Aluminum
oxide, silicon carbide, and other synthetic abrasives are
best for power sanding. Natural abrasives, such as flint
and garnet are too soft for power sanding.
In general, when sanding, coarse grit removes the most
material and fine grit produces the best finish. The
condition of the surface to be sanded determines which
grit will do the best job. If the surface is rough, start with
a coarse grit and sand until the surface is uniform. Then
use medium grit to remove scratches left by the coarser
grit. Finally, use finer grit for finishing the surface. Always
continue sanding with each grit until the surface is
uniform.
NOTE: Do not use the sander without a sanding sleeve.
Doing so will damage the rubber spindle.
Select and install the desired sanding sleeve for your
particular application. As mentioned previously, you can
use sanding sleeves from 1/2 in. (12.7 mm) to 3 in.
(76.2 mm) in diameter with this sander. Choose one that
is close in size to the workpiece you are sanding.
Fig. 2
SANDING
SLEEVE
THROAT
PLATE
THROAT
PLATE
OPENING
SELECTING THROAT PLATES/UPPER
SPINDLE WASHERS
See Figure 2.
Six throat plates are provided with this sander. Each
throat plate indicates the correct sanding sleeve/rubber
spindle size to use.
The chart below identifies the relationship between
sanding sleeves/rubber spindles, throat plates, and upper
spindle washers.
WARNING:
Failure to use the correct size throat plate with its
matching sanding sleeve could result in fingers being
pinched or the workpiece being pulled down between
the throat plate and the sanding sleeve.
Sanding Sleeve/Rubber Spindle Throat Plate Upper Spindle Washer
1/2 in. (12.7 mm) .5” (13 mm) 5/8 in. (15.9 mm)
3/4 in. (19.1 mm) .75” (19 mm) 7/8 in. (22.2 mm)
1 in. (25.4 mm) 1” (26 mm) 7/8 in. (22.2 mm)
1-1/2 in. (38.1 mm) 1.5” (38 mm) 7/8 in. (22.2 mm)
2 in. (50.8 mm) 2” (51 mm) 1-13/16 in. (46 mm)
3 in. (76.2 mm) 3” (76 mm) 1-13/16 in. (46 mm)