model 31-730 (420-01-651-0011)

model 31-730 (420-01-651-0011)
6” Belt and 12" Disc
Abrasive Finishing
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6” BELT AND 12” DISC ABRASIVE FINISHING
MACHINE SHOWN WITH ENCLOSED STEEL
STAND AND ELECTRICALS
DATED 8-15-92 PART NO. 420-01-651-0011
Delta International Machinery Corp. 1992
4ADELTA
TVANVN NOILONULSNI
SAFETY RULES
“As with all machinery there are certain hazards involved with operation and use of the machine. 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.
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 for which it was designed. If you have any questions relative
to its application DO NOT use the machine until you have written Delta Machinery and we have advised you.
DELTA INTERNATIONAL MACHINERY CORP.
MANAGER OF TECHNICAL SERVICES
246 ALPHA DRIVE
PITTSBURGH, PENNSYLVANIA 15238
(IN CANADA: 644 IMPERIAL ROAD, 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.
4. GROUND ALL TOOLS. If tool is equipped with three-
prong plug, it should be plugged into a three-hole elec-
trical receptacle. If an adapter is used to accommodate
a two-prong receptacle, the adapter lug must be attach-
ed to a known ground. Never remove the third prong.
5. REMOVE ADJUSTING KEYS AND WRENCHES.
Form habit of checking to see that keys and adjusting
wrenches are removed from tool before turning it “on.”
6. KEEP WORK AREA CLEAN. Cluttered areas and
benches invite accidents.
7. 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.
8. KEEP CHILDREN AND VISITORS AWAY. All children
and visitors should be kept a safe distance from work area.
9. MAKE WORKSHOP CHILDPROOF - with padlocks,
master switches, or by removing starter keys.
10. DON’T FORCE TOOL. It will do the job better and
be safer at the rate for which it was designed.
11. USE RIGHT TOOL. Don’t force tool or attachment
to do a job for which it was not designed.
12. WEAR PROPER APPAREL. No loose clothing,
gloves, neckties, rings, bracelets, or other jewelry to get
caught in moving parts. Nonslip foot wear is recommend-
ed. Wear protective hair covering to contain long hair.
13. ALWAYS USE SAFETY GLASSES. Wear safety
glasses (must comply with ANSI 287.1). Everyday eye-
glasses only have impact resistant lenses; they are not
safety glasses. Also use face or dust mask if cutting opera-
tion is dusty.
14. 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.
15. DON’T OVERREACH. Keep proper footing and
balance at all times.
16. MAINTAIN TOOLS IN TOP CONDITION. Keep tools
sharp and clean for best and safest performance. Follow
instructions for lubricating and changing accessories.
17. DISCONNECT TOOLS before servicing and when
changing accessories such as blades, bits, cutters,
etc.
18. USE RECOMMENDED ACCESSORIES. The use of
Improper accessories may cause hazards.
19. AVOID ACCIDENTAL STARTING. Make sure switch
Is in “OFF” position before plugging in power cord.
20. NEVER STAND ON TOOL. Serious injury could
occur if the tool is tipped or if the cutting tool is accident-
ally contacted.
21. 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.
22. DIRECTION OF FEED. Feed work into a blade or
cutter against the direction of rotation of the blade or cutter
only.
23. NEVER LEAVE TOOL RUNNING UNATTENDED.
TURN POWER OFF. Don’t leave tool until it comes to a
complete stop.
24. DRUGS, ALCOHOL, MEDICATION. Do not operate
tool while under the influence of drug, alcohol or any
medication.
25. MAKE SURE TOOL IS DISCONNECTED FROM
POWER SUPPLY while motor is being mounted, con-
nected or reconnected.
26. WARNING: 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.
ADDITIONAL SAFETY RULES
FOR ABRASIVE FINISHING MACHINES
1. IF YOU ARE NOT thoroughly familiar with the opera-
tion of Abrasive Finishing Machines, obtain advice from
your supervisor, instructor or other qualified person.
2. MAINTAIN minimum clearance between the table and
sanding belt or disc.
3. MAKE SURE abrasive belt is tracking correctly and
properly installed on machine.
4. MAKE SURE the abrasive belt is not torn or loose.
5. ALWAYS keep hands away from abrasive surfaces.
6. ALWAYS use a backstop when using sanding arm in a
horizontal position.
7. NEVER wear gloves or hold the work with a rag when
sanding.
8. SAND with the grain of the wood.
9. ALWAYS sand on downward side of disc when using
the disc finishing machine, so that the work is held
securely on the table.
10. DISCONNECT machine from power source when
making repairs.
11. SHUT OFF power and do not leave until the machine
has come to a complete stop and the work area is clean.
12. Additional information regarding the safe and proper
operation of this product is available from the National
Safety Council, 444 N. Michigan Avenue, Chicago, IL
60611 in the Accident Prevention Manual for Industrial
Operations and also in the Safety Data Sheets provided
by the NSC. Please also refer to the American National
Standards Institute ANSI 01.1 Safety Requirements for
Woodworking Machinery and the U.S. Department of
Labor OSHA 1910.213 Regulations.
IMPORTANT
IMPORTANT: 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 EXPLAINED IN THE SECTION “ADJUSTING TENSION AND TRACKING OF
THE SANDING BELT.”
UNPACKING
Carefully unpack the machine, stand and all loose items
from the cartons. Remove the protective coating from
machined surfaces of the machine. 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 all unpainted surfaces with
a good quality paste wax.
STAND AND ELECTRICALS
If you purchased your machine complete with stand and
electricals, factory mounted and wired, the stand is ship-
ped 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.
Fig. 3
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 and fasten the machine
to the stand using the four 3” long hex head screws,
two of which are shown at (D) Fig. 4A, four flat washers
and four hex nuts.
ALIGNING PULLEYS,
ASSEMBLING BELT AND
ADJUSTING BELT TENSION
Using a straight edge (A) Fig. 5, 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 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. 5A to the arbor pulley and
motor pulley (B). Adjust for proper belt tension by raising
or lowering motor (E) on motor mounting posts (J) 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.
Fig. 5A
ELECTRICAL 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.
SINGLE PHASE
INSTALLATION
If the motor on your machine is wired for 115 Volt, single
phase, the power cord is equipped with a plug that has
two flat, parallel current-carrying prongs and one longer
round or “U”-shaped, ground prong which requires a
mating 3-conductor grounded type receptacle, as shown
in Fig. 6.
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-carrying prongs in tandem, and one round
or ‘U’ shaped longer ground prong. This is used only with
the proper mating 3-conductor grounding type receptacle,
as shown in Fig. 7.
When the three-prong plug on your machine is plugged
into a grounded 3-conductor receptacle, 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 competent
electrician.
INSTALLING ABRASIVE DISC
1. Make certain the disc assembly (A) Fig. 8, is clean,
dry, and free of any oil or grease.
2. Separate and fold back approximately half of the
adhesive backing (B) Fig. 8, from the abrasive disc (C),
supplied with the machine. Insert the abrasive disc (C),
with the backing (B), between the table (D), and disc
assembly (A), as shown in Fig. 8, and press the top half
of the adhesive disc (C), in position.
3. Manually turn the disc assembly (A) Fig. 9, and
remove the paper backing from the abrasive disc (C), and
firmly press onto face of disc (A).
4, IMPORTANT: MAKE CERTAIN THE ABRASIVE
DISC (C), IS SECURELY IN POSITION BEFORE APPLY-
ING POWER TO THE MACHINE.
CURRENT-CARRYING PRONGS-
GROUND PRONG
Fig. 6
CURRENT-CARRYING PRONGS-
ADJUSTING TENSION
AND TRACKING OF
SANDING BELT
YOUR MACHINE IS SHIPPED WITHOUT BELT TEN-
SION 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:
1. Remove lock knob and washer (A) Fig. 10. Remove
top cover (B).
2. Turn the belt tension handle (C) Fig. 11, 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 pre-
vent 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. 12, and while
rotating the belt (F) by hand, as shown, 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. 12, 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. 12, being careful the adjusting screw (E)
does not turn.
6. Replace top cover (B) Fig. 10.
ADJUSTING
BELT SANDER TABLE
To tilt the table, loosen the table tilting handle (A) Fig. 13,
move the table to the desired angle, and lock the table
tilting handle. The table tilting handle can be reposition-
ed by pulling out the handle and repositioning it on the
hex nut located underneath the handle. Positive table
stops are provided at 90° and 45°. To adjust the stops,
proceed as follows:
1. Loosen the table locking handle (A) Fig. 13, and lift
the table up to approximately 10 degrees.
2. Flip out stop bracket (C) Fig. 14, 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. 14 until the table is
at 90° to the platen and adjust the pointer (E) to the 09
mark on the angle-of-tilt scale (F).
5. The same procedure is followed when adjusting the
table to stop at the 45° position as shown in Fig. 15.
ADJUSTING POSITION
OF SANDING ARM
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. 16, move the sanding arm
to the desired position, and lock 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 posi-
tion, the arm will contact the stop (B) as shown in Fig. 17.
IMPORTANT: BEFORE STARTING THE MACHINE
AFTER REPOSITIONING THE SANDING ARM ALWAYS
CHECK THE TRACKING OF THE BELT.
Fig. 17
ADJUSTING
DISC SANDER TABLE
The table is set at the factory so that the edge of the table
is approximately 3/32” away from the face of the disc
assembly. This is done to provide enough clearance for
the table when it is tilted to 45 degrees. If it is ever
necessary to move the table away from or closer to the
disc, loosen the four screws that hold the table to the
trunnions and move the table away from or closer to the
disc. If you cannot obtain enough movement of the table
with this method, proceed as follows:
1. Remove two screws, one of which is shown at (A) Fig.
18, and remove belt guard (B).
2. Remove hole plug (C) Fig. 19, and locate the two
screws that fasten the disc to the shaft.
3. Using wrench (F) Fig. 20, loosen the two screws on
hub of sanding disc and move the disc (D) in or out on
the shaft as needed.
4. Tighten two screws and replace hole plug and belt
guard.
NOTE: After this adjustment is made, make certain the
miter gage slot (E) Fig. 20 is parallel with the disc (D) by
following the instructions in “ADJUSTING MITER GAGE
SLOTS PARALLEL WITH THE BELT AND DISC.”
ADJUSTING TABLE SQUARE
WITH SANDING DISC
1. Place an accurate square on the table with one end
of the square against the disc, as shown in Fig. 21.
2. Loosen the table locking knobs (A) Fig. 21, which are
located on each end of the table and move the table until
it is at 90 degrees to the disc. Then tighten the table
locking knobs (A).
3. Adjust the pointer (B) Fig. 21, so it points to the “0”
mark on the scale.
ADJUSTING MITER GAGE
SLOTS PARALLEL WITH
THE BELT AND DISC
These adjustments are made at the factory; however,
during shipment they may have been disturbed. If an
adjustment is necessary, proceed as follows:
BELT SANDER
1. Check to see if the miter gage slot is parallel with the
sanding belt by placing a square in the miter gage slot
with one end of the square against the platen, as shown
in Fig. 22.
2. Slide the square the full width of the platen checking
to be sure the distance between the miter gage slot and
the platen is the same.
3. If an adjustment is necessary, loosen the three screws
that hold the table to the bracket and shift the table until
the slot is parallel to the platen. Then tighten the three
screws.
DISC SANDER
1. Check to see if the miter gage slot is parallel with the
disc by placing a square in the miter gage slot with one
end of the square against the disc, as shown in Fig. 23.
2. Using a pencil, make a mark on the disc where the
square contacts the disc, as shown in Fig. 23.
3. Rotate the disc to the other end of the table and check
the distance with the miter gage.
4. If an adjustment is necessary, loosen the four screws
that hold the table to the trunnions and adjust the table
until the miter gage groove is parallel with the disc. NOTE:
When making this adjustment be sure the table locking
handles are tightened.
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:
Remove the side cover and top idler drum guard.
2. Remove the three screws (C) Fig. 24, 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. 24. Do not tighten the three
SCrews.
4. Using a straight edge (D) adjust the platen (A) Fig.
24, so itis 1/32" higher than the crown of the drums (B),
and tighten the three screws (C).
ABRASIVE BELTS & DISCS - THEIR SELECTION AND USE
We supply a wide range of belts and discs for use on your Belt and Disc Finishing Machine. These belts and discs
are recommended for a wide range of work on wood, metals, plastics and other materials. However, when a large amount
of production work of one kind is to be done, it is best to call in a coated abrasive specialist for his specific belt
and disc recommendations.
All materials may be worked on a dry belt or disc. But for professional quality or for production work a low melting
point grease should be used for cooler cutting, better finish, and for longer belt life. Even coarse belts will ‘load’ when
grinding aluminum dry, and so a lubricant should always be used for this material. To a varying degree, this is true
of other non-ferrous metals like soft brass and zinc.
A grease stick is often applied to the belt or disc to prevent “loading” of the belt on softer materials especially aluminum.
When grinding steel or some kinds of plastic, the grease stick is often used to prevent over-heating of the work piece.
Many times a single belt is used for both stock removal and for finish, just by lubricating one half of the belt with light
grease for stock removal and the other side or half of the belt with a heavy grease for polishing to bring out a good
finish. This can be done only when the parts are very small and need not be moved across the face of the belt.
When an abrasive belt smaller than 6” is desired, the 6” belt can be split. This can be done by turning the belt inside
out and with a knife or other sharp instrument cut a slot in the belt at the desired width. Then proceed to tear the belt.
CAUTION: 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 us) will be found to 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. The grit is, of course, turned to the outside
and cement should be used sparingly to avoid lumps under the “tire.”
10
ACCESSORIES
FOR 6” BELT AND 12” DISC ABRASIVE FINISHING MACHINE
‘NO. 31-401 TILTING TABLE, with trunnion assembly.
NO. 31-403 BACKSTOP, complete with bracket. 4 Ibs.
NO. 31-014 WOOD FENCE, 31” x 7%", with brackets.
6 Ibs.
NO. 50-114 ENCLOSED STAND. Includes basic stand,
motor mounting plate and hardware for mounting 6”
Abrasive Belt Finishing Machine or 6” Belt/12” Disc
Finishing Machine. 64 Ibs.
"ABRASIVE BELTS. 6” wide x 48” long. Ya Ib. each.
‘Cat. No. Type Grit
31-402 Al. Oxide 80 Grit
31-404 Al. Oxide 100 Grit
31-405 Al. Oxide 50 Grit
ABRASIVE DISCS. 12” diam. Package of 6. 1% Ibs.
Cat. No. Type Grit
31-427 Garnet 50 Grit
31-428 Al. Oxide 60 Grit
11
‘NO. 49-503 DISC ADHESIVE. 1 Ib.
‘NO. 31-034 DISC ASSEMBLY with flange and set screws.
For replacement use on 6” Belt/12” Disc Combination
only. 11 165.
‘NO. 34-895 AUTO-SET MITER GAGE. For straight and
angle finishing. Has 3/8” x 18” guide bar and pivoting
work support body with pointer and calibrations reading
through 120° swing. Adjustable, positive stops at 90° and
459 positions. Accommodates No. 34-568 Clamp Attach-
ment. 3/2 Ibs.
NO. 34-568 CLAMP ATTACHMENT for 34-895 Miter
Gage. 1% lbs.
NO. 50-263 MOBILE BASE. For 6” Belt, 12” Disc and/or
Belt/Disc Combination Finishing Machine on Enclosed
Type Stand. 19 Ibs.
ADeLTA
PARTS, SERVICE OR WARRANTY ASSISTANCE
All Delta Machines and accessories are manufactured to
high quality standards and are serviced by a network
of factory service centers and authorized service stations
Delta's toll-free ‘hotline’ number.
listed in your owner's manual. To obtain additional infor-
mation regarding your Delta quality product or to obtain
parts, service or warranty assistance, please call or fax
Delta maintains a modern,
efficient Parts Distribution
Center, maintaining an
inventory of over 15,000
parts located in Memphis,
Memphis, TN 38118
4290 Raines Road
Highly qualified and exper-
ienced Customer Service
Representatives are stand-
Tennessee. 5
Phone: (901) 363-8800
HOTLINE
800-223-PART
ing by to assist you on
weekdays from 8:00 A.M to
5:00 P.M. Memphis time.
FAX: 800-535-6488
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A DELTA
Two Year Limited Warranty
Delta Machinery
Delta will repair or replace, atitsexpense and atits option, any Delta machine, machine part, or machine
accessory which in normal use has proven to be defective in workmanship or material, provided that
the customer notifies his supplying distributor of the alleged defect within two years from the date
of delivery to him, of the product and provides Delta Machinery with reasonable opportunity to verify
the defect by inspection. Delta Machinery may require that electric motors be returned prepaid to
the supplying distributor or authorized service center for inspection and repair or replacement. Delta
Machinery will not be responsible for any asserted defect which has resulted from misuse, abuse
or repair or alteration made or specifically authorized by anyone other than an authorized Delta
service facility or representative. Under no circumstances will Delta Machinery be liable for inci-
dental or consequential damages resulting from defective products. This warranty is Delta Machinery’s
sole warranty and sets forth the customer's exclusive remedy, with respect to defective products;
all other warranties, express or implied, whether of merchantability, fitness for purpose, or other-
wise, are expressly disclaimed by Delta.
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