Delta 31-552 User Manual

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6" Abrasive Belt

Finishing Machine

(Model 31-552)

6" Abrasive Belt Finishing Machine shown with optional enclosed steel stand and electricals.

PART NO. 406-03-651-0017(0110)

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).

MANUAL INSTRUCTION

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. Safety equipment such as guards, push sticks, hold-downs,featherboards, goggles, dust masks and hearing protection can reduce your potential for injury. But even the best guard won’t make up for poor judgment, carelessness or inattention.Always use common sense and exercisecaution in the workshop. If a procedure feels dangerous, don’t try it. Figure out an alternative procedure that feels safer.REMEMBER: Your personal safety is your responsibility.

This machine was designed for certain applications only. Delta Machinery strongly recommends that this machine not be modified and/or used for any application other than that for which it was designed. If you have any questions relative to a particular application, DO NOT use the machine until you have first contacted Delta to determine if it can or should be performed on the product.

Technical Service Manager Delta Machinery

4825 Highway 45 North Jackson, TN 38305

(IN CANADA: 505 SOUTHGATE DRIVE, GUELPH, ONTARIO N1H 6M7)

WARNING: FAILURE TO FOLLOW THESE RULES MAY RESULT IN SERIOUS PERSONAL INJURY

1.FOR YOUR OWN SAFETY, READ INSTRUCTION MANUAL BEFORE OPERATING THE TOOL. Learn the tool’s application and limitations as well as the specific hazards peculiar to it.

2.KEEP GUARDS IN PLACE and in working order.

3.ALWAYS WEAR EYE PROTECTION. Wear safety glasses. Everyday eyeglasses only have impact resistant lenses; they are not safety glasses. Also use face or dust mask if cutting operation is dusty. These safety glasses must conform to ANSI Z87.1 requirements. NOTE:Approved glasses have Z87 printed or stamped on them.

4.REMOVE ADJUSTING KEYS AND WRENCHES. Form habit of checking to see that keys and adjusting wrenches

are removed from tool before turning it “on”.

5.KEEP WORK AREA CLEAN. Cluttered areas and benches invite accidents.

6.DON’T USE IN DANGEROUS ENVIRONMENT. Don’t use power tools in damp or wet locations, or expose them to rain. Keep work area well-lighted.

7.KEEP CHILDREN AND VISITORS AWAY. All children and visitors should be kept a safe distance from work area.

8.MAKE WORKSHOP CHILDPROOF – with padlocks, master switches, or by removing starter keys.

9.DON’T FORCE TOOL. It will do the job better and be safer at the rate for which it was designed.

10.USE RIGHT TOOL. Don’t force tool or attachment to do a job for which it was not designed.

11.WEAR PROPER APPAREL. No loose clothing, gloves, neckties, rings, bracelets, or other jewelry to get caught in moving parts. Nonslip footwear is recommended. Wear protective hair covering to contain long hair.

12.SECURE WORK. Use clamps or a vise to hold work when practical. It’s safer than using your hand and frees both hands to operate tool.

13.DON’T OVERREACH. Keep proper footing and balance at all times.

14.MAINTAIN TOOLS IN TOP CONDITION. Keep tools sharp and clean for best and safest performance. Follow instructions for lubricating and changing accessories.

15.DISCONNECT TOOLS before servicing and when changing accessories such as blades, bits, cutters, etc.

16.USE RECOMMENDED ACCESSORIES. The use of accessories and attachments not recommended by Delta may cause hazards or risk of injury to persons.

17.REDUCE THE RISK OF UNINTENTIONAL STARTING. Make sure switch is in “OFF” position before plugging in power cord. In the event of a power failure, move switch to the “OFF” position.

18.NEVER STAND ON TOOL. Serious injury could occur if the tool is tipped or if the cutting tool is accidentally contacted.

19.CHECK DAMAGED PARTS. Before further use of the tool, a guard or other part that is damaged should be carefully checked to ensure that it will operate properly and perform its intended function – check for alignment of moving parts, binding of moving parts, breakage of parts, mounting, and any other conditions that may affect its operation. A guard or other part that is damaged should be properly repaired or replaced.

20.DIRECTION OF FEED. Feed work into a blade or cutter against the direction of rotation of the blade or cutter only.

21.NEVER LEAVE TOOL RUNNING UNATTENDED. TURN POWER OFF. Don’t leave tool until it comes to a complete stop.

22.STAY ALERT, WATCH WHAT YOU ARE DOING, AND USE COMMON SENSE WHEN OPERATING A POWER TOOL. DO NOT USE TOOL WHILE TIRED OR UNDER THE INFLUENCE OF DRUGS, ALCOHOL, OR MEDICATION. A moment of inattention while operating power tools may result in serious personal injury.

23.MAKE SURE TOOL IS DISCONNECTED FROM POWER SUPPLY while motor is being mounted, connected or reconnected.

24.THE DUST GENERATED by certain woods and wood products can be injurious to your health. Always operate machinery in well ventilated areas and provide for proper dust removal. Use wood dust collection systems whenever possible.

25.WARNING: SOME DUST CREATED BY POWER SANDING, SAWING, GRINDING, DRILLING, AND OTHER CONSTRUCTION ACTIVITIEScontains chemicals known to cause cancer, birth defects or other reproductive harm. Some examples of these chemicals are:

· lead from lead-basedpaints,

· crystalline silica from bricks and cement and other masonry products, and

· arsenic and chromium from chemically-treatedlumber. Your risk from these exposures varies, depending on how often you do this type of work. To reduce your exposure to these chemicals: work in a well ventilated area, and work with approved safety equipment, such as those dust masks that are specially designed to filter out microscopic particles.

SAVE THESE INSTRUCTIONS.

Refer to them often and use them to instruct others.

2

ADDITIONAL SAFETY RULES FOR ABRASIVE BELT FINISHING MACHINES

WARNING: FAILURE TO FOLLOW THESE RULES MAY RESULT IN SERIOUS PERSONAL INJURY

1.DO NOT OPERATE THIS MACHINE UNTIL it is assembledand installedaccording to the instructions.

2.OBTAIN ADVICE from your supervisor, instructor, or another qualified person if you are not familiar with the operation of this machine.

3.FOLLOW ALL WIRING CODES and recommended electrical connections.

4.COVER POWER TAKE-OFFSHAFT when not using accessories.Unguarded rotating shafts can create an entanglement hazardwhich can result in injury.

5. USE A DUST COLLECTION SYSTEMwith this machine.

6.THIS MACHINE CAN BE USED FOR PROCESSING WOOD OR METAL PRODUCTS:

However, combining both wood dust and metal filings can create a fire hazard. In addition combining aluminum dust with metal dust can create a fire hazard. Before processing different types of materials, such as wood, steel, and aluminum, clean machine and dust collector to avoid a fire hazard. DO NOT sand or polish magnesium. It could catch on fire.

7.CHECK THE TABLE BELT TRACKING to prevent belt run-off.

8.CHECK BELTS FOR WEAR and for tension.

9.CLEAR THE SANDING AREA and infeed/outfeed tables of all objects (tools, scrap pieces, etc.) prior to starting machine.

10.DO NOT sand pieces of material that are shorter than 7" in length or thinner than 1/32".

11.PROVIDE ADDITIONAL SUPPORT at table height when sanding large work pieces.

12.SUPPORT ALL SANDING WORKPIECES with a table or additional support at table height. Curved work on an outer sanding drum is the only exception.

13.PREVENT THE WORKPIECE FROM CONTACTING THE SANDING BELT before starting the machine.

14.AVOID AWKWARD HAND POSITIONS. A sudden slip could cause a hand to contact the sanding belt.

15.NEVER WEAR GLOVES or hold the work with a rag when sanding.

16.HOLD THE WORK FIRMLY when sanding.

17.SAND with the grain of the wood

18.FEED WORK against the drum rotation.

19.NEVER perform layout, assembly, orset-upwork on the tables when the machine is operating.

20.DISCONNECT THE MACHINE from the power source before installing or removing accessories, before adjusting or changing set-ups, or when making repairs.

21.DISCONNECT THE MACHINE from the power source, and clean the table/work area before leaving the machine. LOCK THE SWITCH IN THE “OFF” POSITIONto prevent unauthorized use.

22.ADDITIONAL INFORMATION regarding the safe and proper operation of this machine is available from the Power Tool Institute, 1300 Summer Avenue, Cleveland, OH 44115-2851. Information is also available from the National Safety Council, 1121 Spring Lake Drive, Itasca, IL 60143-3201. Please refer to the American National Standards Institute ANSI 01.1 Safety Requirements for Woodworking Machines and the U.S. Department of Labor OSHA 1910.213 Regulations.

SAVE THESE INSTRUCTIONS. Refer to them often

and use them to instruct others.

3

POWER CONNECTIONS

IMPORTANT: Make sure the electrical characteristics are the same between the motor nameplate and the power source and make sure the power circuit the machine will be used on is properly fused and that wire size is correct.

IN ALL CASES, MAKE SURE THE RECEPTACLE IN QUESTION IS PROPERLY GROUNDED.

WARNING: DO NOT EXPOSE THE MACHINE TO RAIN OR OPERATE THE MACHINE IN DAMP LOCATIONS.

GROUNDING INSTRUCTIONS

WARNING: THIS MACHINE MUST BE GROUNDED WHILE IN USE TO PROTECT THE OPERATOR FROM ELECTRIC SHOCK.

SINGLE PHASE

INSTALLATION

If the motor on your machine is wired for 115 voIt, single phase, the power cord is equipped with a plug that has two flat, parallel current-carryingprongs and one longer round or"U"-shaped,ground prong Which requires a mating3-conductorgrounded type receptacle, as shown in Fig. A.

If the motor on your machine is wired for 230 Volt, single phase, the power cord is equipped with a plug that has two flat, current-carryingprongs in tandem, and one round or "U" shaped longer ground prong. This is used only with the proper mating3-conductorgrounding type receptacle, as shown in Fig. B.

When the three-prongplug on your machine is plugged into a grounded3-conductorreceptacle, the long ground prong on the plug contacts first so the machine is properly grounded before electricity reaches it.

THREE PHASE

INSTALLATION

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.

Permanently connected machines:

This machine should be connected to a grounded metal permanent wiring system; or to a system having a equipment-groundingconductor. These connections should be made by a qualified electrician.

WARNING: IN ALL CASES, MAKE CERTAIN THE RECEPTACLE IN QUESTION IS PROPERLY GROUNDED. IF YOU ARE NOT SURE HAVE A QUALIFIED ELECTRICIAN CHECK THE RECEPTACLE.

 

GROUNDED OUTLET BOX

GROUNDED OUTLET BOX

 

CURRENT

CURRENT

CARRYING

CARRYING

PRONGS

PRONGS

 

115

230

VOLT

VOLT

 

GROUNDING BLADE

GROUNDING BLADE

IS LONGEST OF THE 3 BLADES

IS LONGEST OF THE 3 BLADES

 

Fig. A Fig. B

4

EXTENSION CORDS

Use proper extension cords. Make sure your extension cord is in good condition and is a 3-wireextension cord which has a3-pronggrounding type plug and matching receptacle which will accept the machine’s plug. When using an extension cord, be sure to use one heavy enough to carry the current of the machine. An undersized cord will cause a drop in line voltage, resulting in loss of power and overheating. Fig. D, shows the correct gauge to use depending on the cord length. If in doubt, use the next heavier gauge. The smaller the gauge number, the heavier the cord.

MINIMUM GAUGE EXTENSION CORD

RECOMMENDED SIZES FOR USE WITH STATIONARY ELECTRIC MACHINES

Ampere

 

Total Length

Gauge of

Rating

Volts

of Cord in Feet

Extension Cord

 

 

 

 

0-6

115

up to 25

18 AWG

0-6

115

25-50

16 AWG

0-6

115

50-100

16 AWG

0-6

115

100-150

14 AWG

 

 

 

 

6-10

115

up to 25

18 AWG

6-10

115

25-50

16 AWG

6-10

115

50-100

14 AWG

6-10

115

100-150

12 AWG

10-12

115

up to 25

16 AWG

10-12

115

25-50

16 AWG

10-12

115

50-100

14 AWG

10-12

115

100-150

12 AWG

12-16

115

up to 25

14 AWG

12-16

115

25-50

12 AWG

12-16

115

GREATER THAN 50 FEET NOT RECOMMENDED

 

 

 

 

Fig. D

MINIMUM GAUGE EXTENSION CORD

RECOMMENDED SIZES FOR USE WITH STATIONARY ELECTRIC MACHINES

Ampere

 

Total Length

Gauge of

Rating

Volts

of Cord in Feet

Extension Cord

 

 

 

 

0-6

230

up to 50

18 AWG

0-6

230

50-100

16 AWG

0-6

230

100-200

16 AWG

0-6

230

200-300

14 AWG

 

 

 

 

6-10

230

up to 50

18 AWG

6-10

230

50-100

16 AWG

6-10

230

100-200

14 AWG

6-10

230

200-300

12 AWG

10-12

230

up to 50

16 AWG

10-12

230

50-100

16 AWG

10-12

230

100-200

14 AWG

10-12

230

200-300

12 AWG

12-16

230

up to 50

14 AWG

12-16

230

50-100

12 AWG

12-16

230

GREATER THAN 100 FEET NOT RECOMMENDED

 

 

 

 

Fig. D

OPERATING INSTRUCTIONS

FOREWORD

The Delta 6" Abrasive Belt Finishing Machine provides fine finishes fast. The 6" abrasive belt operates vertically, horizontally or any angle in between. The support table on the 6" Abrasive Belt Finishing Machine tilts 45° out and 20° in for bevel operations.

UNPACKING AND CLEANING

Carefully unpack the machine and all loose items from the shipping container(s). Remove the protective coating from all unpainted surfaces. This coating may be removed with a soft cloth moistened with kerosene (do not use acetone, gasoline or lacquer thinner for this purpose). After cleaning, cover the unpainted surfaces with a good quality household floor paste wax.

5

ASSEMBLY

STAND AND ELECTRICALS

If you purchased your machine with the optional steel stand and electricals, the stand is shipped as shown in Fig. 2. The switch (A) Fig. 2 and motor (B) Fig. 3 are completely assembled to the stand and the necessary wiring from the motor to the switch has been completed.

ASSEMBLING

MACHINE TO STAND

Place the machine on the stand with the arbor pulley over the opening (A) Fig. 4, on the top of the stand. The drive belt is shipped on the arbor pulley of the machine and must be inserted down through the opening (A). The disc end of the machine is to be positioned on the same end of the stand that the switch (B) Fig. 4, is located. Line up the four holes on the base of the machine with the four holes (C) in the top of the stand. Place a 3/8" flat washer on a 3/8"-16x3"hex head screw (D) Fig. 5, (two are shown), insert screw through the hole in the base of the machine and the hole in the top of the stand. Thread a3/8"-16hex nut onto the screw and tighten securely. Repeat this process for the three remaining holes.

A

Fig. 2

B

Fig. 3

B A

CC

Fig. 4

D

Fig. 5

6

ALIGNING PULLEYS, ASSEMBLING BELT AND ADJUSTING BELT TENSION

DISCONNECT MACHINE FROM POWER SOURCE

Using a straight edge (A) Fig. 6, make certain the motor pulley (B) is aligned with the arbor pulley. If necessary, the motor pulley (B) can be adjusted on the motor shaft by loosening set screw (C) and moving the motor pulley

(B) in or out as needed. The motor (E) can also be moved in or out along the mounting bars (F) by loosening the four mounting screws, two of which are shown at (G) and moving the motor (E).

Assemble the drive belt (H) Fig. 7 to the arbor pulley and motor pulley (B). Adjust for proper belt tension by raising or lowering motor (E) on motor mounting posts (J) (one is shown), by loosening four mounting nuts, two of which are shown at (K). If necessary, the motor mounting bars (F) can be repositioned on two mounting posts (J). NOTE: MAKE

CERTAIN BOTH PULLEYS ARE KEPT IN ALIGNMENT WHEN ADJUSTING BELT TENSION. Correct belt tension is obtained when there is approximately one inch deflection in the center span of the belt using light finger pressure.

IMPORTANT: BE CERTAIN TO TIGHTEN ALL MOUNTING HARDWARE ONCE FINAL ADJUSTMENTS ARE MADE.

 

 

G

 

 

F

E

 

 

B

 

G

 

A

F

 

 

 

 

C

 

 

Fig. 6

 

 

H

 

 

F

K

J

E

B

F

K

Fig. 7

ASSEMBLING BELT GUARD

Assemble the belt guard (A) to the stand, as shown in Fig. 8. Align the holes in the belt guard with the holes on the machine. Place 1/4" flat washer on a 1/4-20-1/2"round head screw, insert screw through hole in belt guard and hole in machine. Thread a1/4-20hex nut onto screw and tighten securely. Repeat this process for the remaining hole.

B C C B

A

Fig. 8

7

OPERATING CONTROLS AND ADJUSTMENTS

STARTING AND STOPPING THE ABRASIVE FINISHING MACHINE

To start the machine, push “ON” button (A) Fig. 10. To stop the machine, push “OFF” button (B).

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 (A) Fig. 11, with a 3/16" diameter shackle to prevent unauthorized use.

ADJUSTING SANDING BELT TENSION AND TRACKING

YOUR MACHINE IS SHIPPED WITHOUT BELT TENSION APPLIED TO THE SANDING BELT. BEFORE OPERATING THE MACHINE IT IS VERY IMPORTANT THAT THE SANDING BELT IS PROPERLY ADJUSTED FOR CORRECT BELT TENSION AND IS TRACKING PROPERLY, AS FOLLOWS:

DISCONNECT MACHINE FROM POWER SOURCE.

1.Remove lock knob and washer (A) Fig. 12. Remove top cover (B).

2.Turn the belt tension handle (C) Fig. 13, clockwise to increase belt tension. Correct tension is determined by two things:

(1)The belt should be flat on the platen.

(2)The belt should be sufficiently tensioned to prevent slipping on very heavy work. For ordinary work, a tension just sufficient to take the curl out of the belt is recommended.

3.Loosen tracking lock knob (D) Fig. 14, and while rotating the belt (F) by hand, tighten or loosen tracking knob (E) until the belt is running true on the pulleys.

4.Then jog the machine on and off to check further if the belt is tracking properly. If the belt is leading to one side or the other, very gently turn the tracking knob (E) Fig. 14, 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.

5.A final adjustment can be made with the motor running. THIS ADJUSTMENT IS USUALLY VERY SLIGHT. After the belt is tracking properly, tighten the lock knob (D) Fig. 14, being careful the adjusting screw

(E) does not turn.

6.Replace top cover (B) Fig. 12.

A

B

Fig. 10

A

Fig. 11

B

A

Fig. 12

C

Fig. 13

E

D

F

Fig. 14

8

E

A F

B

Fig. 15

ADJUSTING TABLE

DISCONNECT MACHINE FROM POWER SOURCE.

To tilt the table, loosen the table tilting handle (A) Fig. 15, move the table to the desired angle, and tighten the table tilting handle. The table tilting handle can be repositioned by pulling out the handle and repositioning it on the hex nut located underneath the handle. Positive table stops are provided at 90° (A) Fig. 17, and 45° (B) Fig. 17. To adjust the stops, proceed as follows:

1.Loosen the table locking handle (A) Fig. 15, and lift the table up to approximately 10 degrees.

2.Flip out stop bracket (C) Fig. 16, and lower the table until the adjustable screw (D) contacts stop bracket (C).

3.Place a square on the table with one end of the square against the platen.

4.Turn the adjusting screw (D) Fig. 16 until the table is at 90° to the platen and adjust the pointer (E) Fig. 15, to the 0° mark on the angle-of-tiltscale (F) Fig. 15.

5.The same procedure is followed when adjusting the table to stop at the 45° position as shown in Fig. 17.

ADJUSTING POSITION OF SANDING ARM

DISCONNECT MACHINE FROM POWER SOURCE.

The sanding arm can be positioned in the vertical or horizontal position, or at any desired angle in between as follows:

1. Loosen two bolts (A) Fig. 18, move the sanding arm to the desired position, and tighten the two bolts.

CAUTION: THE SANDING ARM SHOULD NEVER BE REPOSITIONED WHILE THE MACHINE IS RUNNING.

2. When moving the sanding arm to the horizontal position, the arm will contact the stop (B) as shown in Fig. 19.

IMPORTANT: BEFORE STARTING THE MACHINE AFTER REPOSITIONING THE SANDING ARM ALWAYS CHECK THE TRACKING OF THE BELT.

C

D

Fig. 16

A

B

Fig. 17

A

Fig. 18

B

Fig. 19

9

INSTALLING OR REMOVING ABRASIVE BELT

Your machine uses a 6"x48" belt. To install or remove the belt, proceed as follows:

DISCONNECT MACHINE FROM POWER SOURCE.

1.Remove the idler drum guard (A) and side guard (B) Fig. 20.

2.Turn the belt tension handle counterclockwise to reduce belt tension to a minimum. NOTE: It may be necessary when reducing belt tension that downward pressure be applied on the idler pulley (C) Fig. 21.

3.The sanding belt can then be easily slipped off or onto the drums, as shown in Fig. 21.

IMPORTANT: Lapless sanding belts can be run in either direction. Lapped belts should be installed so that the work will run OFF the lapped portion of the belt and not into the edge of the lap. Most sanding belts have a directional arrow on the inside of the belt to show the direction of rotation.

AFTER INSTALLING A NEW BELT, THE BELT MUST BE ADJUSTED FOR PROPER TENSION AND TRACKING.

ADJUSTING THE PLATEN

The platen (A) Fig. 24, is set at the factory 1/32 of an inch higher than the crown of the drums (B). This allows the belt, when properly tensioned, to lay flat on the platen and eliminate stretching and bulging which might occur if the platen is not at the right height.

When using the machine with a loose belt for "strapping," the platen is removed and replaced as follows:

DISCONNECT MACHINE FROM POWER SOURCE.

1.Remove the side cover (B) Fig. 20 and top idler drum guard (A) Fig. 20.

2.Remove the three screws (C) Fig. 26, that attach the platen to the machine and remove the platen.

3.When replacing the platen, attach it to the machine with the three screws (C) Fig. 26. Do not tighten the three screws.

4.Using a straight edge (D) adjust the platen (A) Fig. 26, so it is 1/32" higher than the crown of the drums (B), and tighten the three screws (C).

A

B

Fig. 20

C

Fig. 21

B

D

A

C

B

Fig. 26

10