PART NO. 406-12-651-0004 - 07-31-01) Copyright © 2001 Delta Machinery To learn more about DELTA MACHINERY visit our website at: www.deltamachinery.com. For Parts, Service, Warranty or other Assistance, please call 1-800-223-7278 (In Canada call 1-800-463-3582).
GENERAL SAFETY RULES Woodworking can be dangerous if safe and proper operating procedures are not followed. As with all machinery, there are certain hazards involved with the operation of the product. Using the machine with respect and caution will considerably lessen the possibility of personal injury. However, if normal safety precautions are overlooked or ignored, personal injury to the operator may result.
ADDITIONAL SAFETY RULES FOR SANDING CENTER 1. 2. WARNING: Do not operate this tool until assembly and installation are complete, according to instructions. WARNING: Unguarded rotating shafts can create an entanglement hazard. ALWAYS COVER THE POWER TAKEOFF SHAFT when accessories are not in use. 3. IF YOU ARE NOT thoroughly familiar with the operation of Belt and Disc Sanders, obtain advice from your supervisor, instructor, and/or other qualified persons. 4.
GROUNDING INSTRUCTIONS WARNING: THIS TOOL MUST BE GROUNDED WHILE IN USE TO PROTECT THE OPERATOR FROM ELECTRIC SHOCK. A temporary adapter, which looks like the adapter illustrated in Fig. 2, may be used to connect this plug to a matching 2conductor receptacle as shown in Fig. 2 if a properly grounded outlet is not available. The temporary adapter should be used only until a properly grounded outlet can be installed by a qualified electrician.
EXTENSION CORDS Use proper extension cords. Make sure your extension cord is in good condition and is a 3-wire extension cord which has a 3-prong grounding type plug and matching receptacle which will accept the tool’s plug. When using an extension cord, be sure to use one heavy enough to carry the current of the tool. An undersized cord will cause a drop in line voltage, resulting in loss of power and overheating. Figs. 4A and 4B show the correct gauge to use depending on the cord length.
OPERATING INSTRUCTIONS FOREWORD Delta Model 31-280 is a powerful 1-1/2 HP belt/disc sander. The induction-type, ball-bearing motor provides long-lasting, smooth performance. The Sanding Center can provide 1971 SFM with the belt, and the disc will revolve at 2500 RPM. UNPACKING AND CLEANING Carefully unpack the tool and all loose items from the shipping container(s). Remove the protective coating from all unpainted surfaces.
ATTACHING TOOL TO STAND 1. Use a helper to lift and position the tool and top shelf (A) Fig. 8 on the four legs (B). A 2. Fasten the top shelf to the six top holes in the legs (four of which are shown). Insert the six 5/8" carriage bolts (C), then attach the flat washers, and hex nuts. C C 3. Tighten all stand mounting hardware, starting with the bottom nuts. B Fig. 8 ATTACHING SANDING DISC CAUTION: DISCONNECT TOOL FROM POWER SOURCE. A B 1. Clean the sanding disc plate (A) Fig.
ATTACHING DUST CHUTE Attach the dust chute (A) Fig. 11 to the bottom of the top shelf (B) using the four 5/8" self-tapping screws. MOVING SANDING ARM TO THE VERTICAL POSITION The sanding arm is shipped in the horizontal position (Fig. 12). To move the arm to the vertical position: A 1. Loosen the lock handle (A) Fig. 12. NOTE: Lock handle is spring-loaded and can be repositioned by pulling out the handle, moving it, and letting it spring back into position. B Fig. 11 2.
OVERLOAD PROTECTION The motor supplied with your sander is equipped with a reset overload relay button (A) Fig. 16. If the motor shuts off or fails to start because of overloading (sanding too heavy, using a worn sanding belt or disc, using the sander beyond its capacity), or low voltage, turn the switch (A) Fig. 14 to the “OFF” position. Let the motor cool three to five minutes and push the reset button (A) Fig. 16. The motor will then start. A ADJUSTING TENSION AND TRACKING OF THE SANDING BELT Fig.
ADJUSTING SANDING BELT TABLE 90 DEGREES TO BELT 1. E DISCONNECT TOOL FROM POWER SOURCE. B 2. Loosen the table tilting lock handle (A) Fig. 21, move the stop (B) into position, and rotate the table (C) until the trunnion (D) contacts the stop (B). Tighten the lock handle (A). NOTE: The lock handle (A) is spring-loaded and can be repositioned by pulling out the handle, moving it, and letting it spring back into position. D A C 3. Place a square (E) Fig. 21 on the table against the belt.
A B C B D E A C D E Fig. 26 Fig. 25 3. To adjust, loosen the two screws (E) Figs. 25 and 26. Move the table (A) until the miter gauge slot is parallel to the sanding belt. Tighten the two screws (E). NOTE: When making this adjustment, tighten the table lock handle. 4. IMPORTANT: MAINTAIN A MAXIMUM DISTANCE OF 1/16" BETWEEN THE SANDING BELT AND THE TABLE. A A C B B D Fig. 28 Fig. 27 CHANGING POSITION OF SANDING ARM 1. The sanding arm (A) can be used in the vertical position (Fig.
A F B E C D Fig. 29 Fig. 30 5. The stop (D) Fig. 30 ensures that the table can rapidly return 90 degrees to the disc after the table has been tilted. 6. Adjust pointer, if necessary, using the wrench supplied with the tool. A A C D B B Fig. 31 Fig. 32 TILTING THE DISC SANDER TABLE The table (A) can be tilted 45 degrees up (Fig. 31), or 45 degrees down (Fig. 32), by loosening the lock handle (B), tilting the table (A), and tightening lock handle (B).
A Fig. 35 Fig. 36 ADJUSTING SANDING DISC GUARD 1. DISCONNECT TOOL FROM POWER SOURCE. 2. Adjust the sanding disc guard (A) Fig. 35, so that the front edge of the guard is slightly in front of the sanding disc for small work, and slightly behind the sanding disc for large work. 3. To adjust, move the guard (A) Fig. 35 in or out as required. The screws do not have to be loosened. ACCESSORY HOLDER An accessory holder (Fig. 36) is provided to store various accessories.
C POWER TAKE-OFF SHAFT 1. B DISCONNECT TOOL FROM POWER SOURCE. 2. A power take-off shaft is provided on the lower end of the sanding belt arm to accommodate accessories. 3. For access to the power take-off shaft, remove the two screws (A) Fig. 43, and cover (B). 4. WARNING: Unguarded rotating shafts (C) Fig 41 can create an entanglement hazard. ALWAYS COVER THE POWER TAKE-OFF SHAFT when not using accessories. A Fig. 41 B A H C REPLACING SANDING BELT To replace the sanding belt: 1.
ACCESSORIES A complete line of accessories is available from your Delta Supplier, Porter-Cable • Delta Factory Service Centers, and Delta Authorized Service Stations. Please visit our Web Site www.deltamachinery.com for a catalog or for the name of your nearest supplier. WARNING: Since accessories other than those offered by Delta have not been tested with this product, use of such accessories could be hazardous. For safest operation, use only Delta recommended accessories with this product.
PORTER-CABLE • DELTA SERVICE CENTERS (CENTROS DE SERVICIO DE PORTER-CABLE • DELTA) Parts and Repair Service for Porter-Cable • Delta Power Tools are Available at These Locations (Obtenga Refaccion de Partes o Servicio para su Herramienta en los Siguientes Centros de Porter-Cable • Delta) ARIZONA Tempe 85282 (Phoenix) 2400 West Southern Avenue Suite 105 Phone: (602) 437-1200 Fax: (602) 437-2200 CALIFORNIA Ontario 91761 (Los Angeles) 3949A East Guasti Road Phone: (909) 390-5555 Fax: (909) 390-5554 San Lean
