Craftsman 320.39590 Operator's Manual page 13

SANDING
This sander can be used for most sanding operations on materials such as wood,
plastic, metal and painted surfaces. Do not use the sander for wet sanding.
_, WARNING: Do not touch the vents after prolonged use; the gear box could
be very hot.
,_ WARNING: Wear safety goggles, dust mask, and hearing protection.
_1_ CAUTION: Clamp the workpiece to prevent it from moving during operating.
An unsecured workpiece could be thrown towards the operator, causing injury.
1. Plug the sander to the power source.
_, WARNING: Before connecting the sander to power source, always check to
be sure that the switch is in the OFF (O) position. Failure to do so could result in
accidental starting of the sander, causing possible serious injury.
2. Place the sander on the workpiece so that the sandpaper is fully in contact
with the workpiece.
3. Start the sander.
,_ WARNING: Keep your head away from the sander and the sanding area.
Your hair could be drawn into the sander, causing serious injury.
4. For best sanding results, apply light pressure on the sander, but do not
force the tool.
NOTICE: Applying additional pressure only slows the motor, rapidly wears
sandpaper, and greatly reduces sander speed. Excessive pressure will overload
the motor, possibly causing damage from the motor overheating and can result
in inferior work.
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Move the sander slowly over the workpiece, making successive passes in parallel
lines, circles, or crosswise movements. The removal rate and the sanding pattern
are determined by the choice of sandpaper and the work surface.
Do not allow sanding on one spot too long as the sander's rapid action may
remove too much material and make the surface uneven.
Upon completion of sanding operation, remove the sander from the
workpiece, turn the sander off and wait until it comes to a complete stop
before putting it down.
Extended periods of sanding may tend to overheat the motor. If this occurs,
remove the sander from the workpiece and turn it off. Wait until the sander
comes to a complete stop before putting the sander down. Remove the
sandpaper and, without obstructing the vent area with your hand, turn the
sander on and run it free without a load to cool the motor.
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