(Model 31-735) PART NO. 913180 - 10-13-03 Copyright © 2003 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).
SAFETY GUIDELINES - DEFINITIONS This manual contains information that is important for you to know and understand. This information relates to protecting YOUR SAFETY and PREVENTING EQUIPMENT PROBLEMS. To help you recognize this information, we use the symbols to the right. Please read the manual and pay attention to these sections. Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.
FAILURE TO FOLLOW THESE RULES MAY RESULT IN SERIOUS PERSONAL INJURY. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. FOR YOUR OWN SAFETY, READ THE INSTRUCTION MANUAL BEFORE OPERATING THE MACHINE. Learning the machine’s application, limitations, and specific hazards will greatly minimize the possibility of accidents and injury. USE CERTIFIED SAFETY EQUIPMENT. Eye protection should comply with ANSI Z87.1 standards, hearing protection should comply with ANSI S3.
ADDITIONAL SAFETY RULES FOR ABRASIVE FINISHING MACHINES FAILURE TO FOLLOW THESE RULES MAY RESULT IN SERIOUS PERSONAL INJURY. 1. DO NOT OPERATE THIS MACHINE until it is completely assembled and installed according to the instructions. A machine incorrectly assembled can cause serious injury. 2. OBTAIN ADVICE from your supervisor, instructor, or another qualified person if you are not thoroughly familiar with the operation of this machine. Knowledge is safety. 3.
POWER CONNECTIONS A separate electrical circuit should be used for your machines. This circuit should not be less than #12 wire and should be protected with a 20 Amp time lag fuse. If an extension cord is used, use only 3-wire extension cords which have 3prong grounding type plugs and matching receptacle which will accept the machine’s plug.
THREE PHASE OPERATION If the motor on your machine is wired for 200V, 230V, or 460V, three phase, the necessary wiring from the starter to the power should be completed 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 machine’s plug.
CARTON CONTENTS 8 2 9 5 1 3 4 11 6 7 10 25 24 29 13 12 36 35 15 32 33 17 16 34 18 19 40 20 21 22 41 39 23 38 43 44 42 Fig. 1 1. Cabinet 24. 1/4-20x5/8" Flat Head Screw (4) 2. Dust Baffle 25. 1/4" Flat Washer (4) 3. Bag Hanger 26. 1/4-20 Hex Nut (4) 4. Dust Chute 27. 5/16-18x1/2" Hex Head Screw (4) 5. Dust Bag 28. 5/16" Lockwasher (4) 6. Hose (2) 29. #10-32x3/4" Button Head Screw (4) 7. Hose Clamp (5) 30. #10 Flat Washer (4) 8. Belt / Disc Sander 31. M4-0.
ASSEMBLY FOR YOUR OWN SAFETY, DO NOT CONNECT THE MACHINE TO THE POWER SOURCE UNTIL THE MACHINE IS COMPLETELY ASSEMBLED AND YOU READ AND UNDERSTAND THE ENTIRE INSTRUCTION MANUAL. CASTER ASSEMBLY / FOOT LEVER 1. DISCONNECT MACHINE FROM POWER SOURCE. B 2. Place the motor cabinet on its side. 3. Align the three holes in the bracket (B) Fig. 2A, with the three holes in the inside of the base (C). C Fig. 2A 4. Align the three holes in the pivot bracket (D) Fig.
7. Insert a 5/16-18x4" hex head screw (G) Fig. 2D, through the hole (F) Fig. 2C, in the pivot bracket, the two holes (E) in the caster assembly and the other hole (F) in the pivot bracket. Thread a 5/16-18 lock nut onto the screw and tighten securely. G Fig. 2D 8. Align the two holes (H) Fig 2E, in the foot lever, with the two holes (J) in the pivot bracket. J H Fig. 2E 9. Assemble foot lever (N) Fig.
DUST BAFFLE 1. DISCONNECT MACHINE FROM POWER SOURCE. A 2. Remove the two screws (A) Fig. 3, and loosen the two screws (B). C 3. Remove the back cover of the cabinet (C) Fig. 3. B Fig. 3 4. Loosen the four nuts (D) Fig. 4, and lower the motor. D Fig. 4 5. Insert the dust baffle (F) Fig. 5, through the front of the cabinet. F Fig. 5 6. Align the four slots in the dust baffle with the four holes (G) Fig. 6, in the top of the cabinet. CABINET TOP 7.
BELT / DISC SANDER TO CABINET THE BELT / DISC SANDER IS HEAVY, USE TWO OR MORE PEOPLE WHEN PLACING THE BELT / DISC SANDER ON TOP OF THE CABINET. 1. C C A DISCONNECT MACHINE FROM POWER SOURCE. 2. Place the Belt/Disc sander on top of the cabinet. NOTE: MAKE SURE THE DRIVE BELT ON THE DISC/BELT SANDER IS INSERTED THROUGH THE HOLE (A) FIG. 7. B B Fig. 7 3. Place a 5/16" lock washer onto a 5/16-18x½" hex head screw. Insert the screw, from the inside of the cabinet, through the hole (B) Fig.
BELT TO MOTOR 1. DISCONNECT MACHINE FROM POWER SOURCE. A 2. Remove the two screws (A) Fig. 12, on top of the disc sander and remove plate (B). B Fig. 12 3. Make sure that the belt (C) Fig. 13, is in the groove of the pulley (D) on the disc sander. D C Fig. 13 4. Lift up on motor (F) Fig. 14, and place belt (C) on the motor pulley (G). C 5. Slowly release motor (F) Fig. 14, to apply pressure to belt (C). G F Fig. 14 6. Make sure that the motor is level and tighten hex nuts (H) Fig.
DUST CHUTE 1. DISCONNECT MACHINE FROM POWER SOURCE. B 2. Insert the dust chute (A) Fig. 16, through the inside hole of the cabinet back panel (B) that was removed in STEP 3 of the section “DUST BAFFLE”. A 3. Align the four holes in the dust chute (A) Fig. 17, with the four holes in the back panel (B). Insert a M40.7x12mm sheet metal screw (C) Fig. 17, through the back panel (B), and thread the screw into the dust chute and tighten securely. Fig. 16 4.
BELT SANDER TABLE 1. E DISCONNECT MACHINE FROM POWER SOURCE. A B C 2. Thread a 3/8-16 lock nut (A) Fig. 21, onto a 3/816x3½" stud (B). NOTE: THREAD LOCK NUT FAR ENOUGH SO THAT THE NUT (A) FIG. 12 IS FLUSH OR SLIGHTLY BELOW THE THREADS ON THE STUD. F D 3. Place a 1-3/16" spring (C) Fig. 21, onto stud (B). Fig. 21 4. Insert sanding ratchet lever (D) Fig. 21, onto stud (B). 5. Thread a 3/8-16 hex nut (E) Fig. 21, onto stud (B). 6. Place a 3/8" flat washer (F) Fig. 21, onto stud (B). K 7.
DISC SANDER TABLE AND POINTER 1. A DISCONNECT MACHINE FROM POWER SOURCE. A 2. Thread the 7/16x3" disc sanding table studs (A) Fig. 25, into the side of the disc sander. 3. Place the disc sander table clamp (B) onto stud (A) as shown in Fig. 26. Repeat this process for the remaining stud (A) Fig. 25, on the other side of the disc sander. Fig. 25 4. Align the table lock rail (C) Fig. 27, on the disc sander table, with the grooves in the table clamps (B). 5. Place a 7/16" flat washer (C) Fig.
ABRASIVE DISC A 1. DISCONNECT MACHINE FROM POWER SOURCE. 2. Make certain the disc assembly (A) Fig. 30, is clean, dry, and free of any oil or grease. C 3. Separate and fold back approximately half of the adhesive backing from the abrasive disc (C) Fig. 30, supplied with the machine. Insert the abrasive disc (C), with the backing, between the table, and disc assembly (A), as shown in Fig. 30, and press the top half of the adhesive disc (C), in position. Fig. 30 4.
OPERATING CONTROLS AND ADJUSTMENTS STARTING AND STOPPING THE ABRASIVE FINISHING MACHINE To start the machine, push “START” button (A) Fig. 35. To stop the machine, push “STOP” button (B). A B Fig. 35 LOCKING SWITCH IN THE “OFF” POSITION IMPORTANT: When the machine is not in use, the switch should be locked in the OFF position using a padlock (C) Fig. 36, with a 3/16" diameter shackle to prevent unauthorized use. C ADJUSTING TENSION AND TRACKING OF SANDING BELT Fig.
4. Rotate the belt by hand, and tighten or loosen tracking knob (E) Fig. 39, until the belt is running true on the pulleys. 5. Jog the machine on and off to confirm the belt is tracking properly. If the belt is leading to one side or the other, very gently turn the tracking knob (E) Fig. 39, clockwise to move the belt toward the adjusting screw and counterclockwise to move the belt away from the adjusting screw while jogging the machine on and off. E 6.
B B A C C A D D Fig. 43 Fig. 44 MITER GAUGE SLOT ON BELT SANDER TABLE PARALLEL TO SANDING BELT 1. DISCONNECT MACHINE FROM POWER SOURCE. 2. Position the table (A) (Figs. 43 and 44) 90 degrees to the belt. Place a square (B) in the miter gauge slot with the blade (C) of the square touching the sanding belt. Check the opposite end of the belt to see if the miter gauge slot (D) is parallel to the belt. E Fig. 45 3. To adjust, loosen the three (3) screws (E) Fig. 45, located underneath the table.
SANDING DISC TABLE 90 DEGREES TO DISC 1. C DISCONNECT MACHINE FROM POWER SOURCE. 2. Loosen the two disc table lock handles, the left one is shown at (A) Fig. 48, and move the table (B) until the it contacts the table stop screw (C) on the left side of the table. Tighten the lock handles. A 3. Place a square (E) Fig. 49 on the table and against the sanding disc. See if the table is 90 degrees to the disc. Fig. 48 4. To adjust, loosen the lock handles (A) Fig.
DUST PORT COVER The abrasive finishing machine is equipped with a manually operated dust port cover (A) Fig. 52, which must be adjusted to suit the sanding operation. 1. A DISCONNECT MACHINE FROM POWER SOURCE. 2. If you are sanding with the disc, push in on dust port cover (A) Fig. 52. Fig. 52 3. If you are sanding on the belt, pull dust port cover (A) Fig. 53, outward. A Fig.
ONLY TEAR THE BELT A FEW INCHES AT A TIME ONE WAY THEN REVERSE THE TEARING ACTION. THIS METHOD WILL REDUCE THE TENDENCY OF THE BELT TO UNRAVEL. For certain applications, a mist coolant attachment (not supplied by Delta) will be helpful. If the use of a mist coolant causes the Abrasive Belt to slip on the lower drive pulley, this can be corrected by using a "tire" which can be homemade by wrapping the pulley with a piece of coated abrasive belt.
END SANDING WITH THE BELT When sanding the ends of wide workpieces it is more convenient to use the sanding belt with the sanding arm in the vertical position as shown in Fig. 57. THE EDGE OF THE TABLE MUST BE POSITIONED A MAXIMUM OF 1/16 INCH AWAY FROM THE SANDING BELT TO AVOID TRAPPING THE WORK OR FINGERS BETWEEN THE TABLE AND SANDING BELT. Fig. 57 SANDING OUTSIDE CURVES Outside curves should be sanded on the sanding disc as shown in Fig. 58.
CIRCLE SANDING WITH DISC A circle sanding attachment is supplied with the sander. It enables the operator to sand circles up to 24" in diameter. Follow the guidelines below to attach and operate the circle sanding attachment. 1. A DISCONNECT MACHINE FROM POWER SOURCE. B C 2. Insert the stop block (A) Fig. 60 into the slot in the sanding disc table. Line up the end of the outside edge (B) of the block to the diameter of the circle shown on the scale.
MAINTENANCE REPLACING SANDING BELT 1. B A A DISCONNECT MACHINE FROM POWER SOURCE. E 2. Loosen the two lock knobs (A) Fig. 64, and remove the top cover (B). D Fig. 64 3. Loosen the two lock knobs (C) Fig. 65 enough to allow the back panel (D) Figs. 64 and 65, to open. NOTE: The lock knobs (C) cannot be removed. C D 4. Release the belt tension by turning the hand lever (E) Fig. 64. Slide the belt (F) Fig. 66 off of both sanding drums. C Fig. 65 5.
OVERLOAD PROTECTION The motor supplied with your sander is equipped with a reset overload relay button (A) Fig. 67. 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 power switch to the “OFF” position. Let the motor cool three to five minutes and push the reset button (A) Fig. 67. Start the motor. A Fig. 67 ACCESSORIES POWER TAKE-OFF SHAFT 1.
PARTS, SERVICE OR WARRANTY ASSISTANCE All Delta Machines and accessories are manufactured to high quality standards and are serviced by a network of Porter-Cable • Delta Factory Service Centers and Delta Authorized Service Stations. To obtain additional information regarding your Delta quality product or to obtain parts, service, warranty assistance, or the location of the nearest service outlet, please call 1-800-223-7278 (In Canada call 1-800-463-3582).
PORTER-CABLE • DELTA SERVICE CENTERS (CENTROS DE SERVICIO DE PORTER-CABLE • DELTA) Parts and Repair Service for Porter-Cable • Delta Machinery 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 Leandro
