Functional Description - Porter Cable 503 Manual Del Instrucciones

FUNCTIONAL DESCRIPTION

FOREWORD
Porter-Cable Belt Sanders are designed for smoothing rough boards,
removing old paint and varnish, fine-surfacing wood, metal, plastics, and
other materials.
SELECTING AN ABRASIVE BELT
The principal abrasive material used on belts for machine sanding are
aluminum oxide and silicon carbide. Aluminum oxide is not as hard as the
silicon carbide, but is tougher and more suited for woods and soft
(nonferrous) metals. Silicon carbide is extremely hard and is best suited for
surfacing stone, marble and glass.
Abrasives are classed as open-coated (grit spaced) or closed-coated
(Grit non-spaced). Closed coatings provide hard, fast cutting action for
hardwoods and dense metals while the open coatings are more suited to
soft materials and painted surfaces.
To obtain the best finish, start with a "COARSE" grade of abrasive and
change to "MEDIUM" and "FINE" grades as work progresses.
A wide range of available PORTER-CABLE Sanding Belts is listed in the
back of the manual. Keep a full assortment on hand so that the correct
belt will always be available.
INSTALLING AND REMOVING THE ABRASIVE BELT
Disconnect tool from power source.
1. Lay sander on its left side and turn the tension relief lever (A) Fig. 1,
locking it under the catch on the plate.
2. Remove the old belt.
3. Install new belt so that arrow,
printed on inside of belt, is at the
top and pointing toward the front of
the sander.
NOTE: Some sanding belts are bi-
directional. These bi-directional
A
belts will not have arrows printed on
them. They may be installed to run
in either direction. Fig. 1
4. Position the belt so that the outer edge is flush with the outer ends of
the pulleys.
5. Release tension lever to restore belt tension.
TO START AND STOP BELT SANDERS
Make sure switch is off and power circuit voltage is the same
as the voltage shown on the specification plate on the sander. Connect
machine to power circuit.
1. Squeeze trigger (A) Fig. 2, to start motor. Release trigger to stop motor.
8