31-396
INSTRUCTION MANUAL
Oscillating Edge Sander
(Model 31-396)
PART NO. 909448 - 03-18-03
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).
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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 exercise caution 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.
1. 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.
2. USE CERTIFIED SAFETY EQUIPMENT. Eye
protection equipment should comply with ANSI Z87.1
standards, hearing equipment should comply with ANSI
S3.19 standards, and dust mask protection should
comply with MSHA/NIOSH certified respirator
standards. Splinters, air-borne debris, and dust can
cause irritation, injury, and/or illness.
3. DRESS PROPERLY. Do not wear tie, gloves, or
loose clothing. Remove watch, rings, and other jewelry.
Roll up your sleeves. Clothing or jewelry caught in
moving parts can cause injury.
4. DO NOT USE THE MACHINE IN A DANGEROUS
ENVIRONMENT. The use of power tools in damp or wet
locations or in rain can cause shock or electrocution.
Keep your work area well-lit to prevent tripping or
placing arms, hands, and fingers in danger.
5. MAINTAIN ALL TOOLS AND MACHINES IN PEAK
CONDITION. Keep tools sharp and clean for best and safest
performance. Follow instructions for lubricating and changing
accessories. Poorly maintained tools and machines can further
damage the tool or machine and/or cause injury.
6. CHECK FOR DAMAGED PARTS. Before using the
machine, check for any damaged parts. Check for
alignment of moving parts, binding of moving parts,
breakage of parts, and any other conditions that may
affect its operation. A guard or any other part that is
damaged should be properly repaired or replaced.
Damaged parts can cause further damage to the
machine and/or injury.
7. KEEP THE WORK AREA CLEAN. Cluttered areas and
benches invite accidents.
8. KEEP CHILDREN AND VISITORS AWAY. Your shop is a
potentially dangerous environment. Children and visitors can be
injured.
9. REDUCE THE RISK OF UNINTENTIONAL STARTING.
Make sure that the switch is in the “OFF” position before
plugging in the power cord. In the event of a power
failure, move the switch to the “OFF” position. An
accidental start-up can cause injury.
10. USE THE GUARDS. Check to see that all guards are
in place, secured, and working correctly to prevent injury.
11. REMOVE ADJUSTING KEYS AND WRENCHES
BEFORE STARTING THE MACHINE. Tools, scrap
pieces, and other debris can be thrown at high speed,
causing injury.
Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.
Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.
Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury.
Used without the safety alert symbol indicates potentially hazardous situation which, if not avoided, may
result in property damage.
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.
SAFETY GUIDELINES - DEFINITIONS
SOME DUST CREATED BY POWER SANDING, SAWING, GRINDING, DRILLING, AND OTHER
CONSTRUCTION ACTIVITIES contains chemicals known to cause cancer, birth defects or other reproductive harm.
Some examples of these chemicals are:
· lead from lead-based paints,
· crystalline silica from bricks and cement and other masonry products, and
· arsenic and chromium from chemically-treated lumber.
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, always wear MSHA/NIOSH
approved, properly fitting face mask or respirator when using such tools.
READ AND UNDERSTAND ALL WARNINGS AND OPERATING INSTRUCTIONS BEFORE
USING THIS EQUIPMENT. Failure to follow all instructions listed below, may result in electric shock,
fire, and/or serious personal injury or property damage.
SA
VE!
IMPORTANT SAFETY INSTRUCTIONS
SA
VE!
GENERAL SAFETY RULES
Technical Service Manager
Delta Machinery
4825 Highway 45 North
Jackson, TN 38305
(IN CANADA: 505 SOUTHGATE DRIVE, GUELPH, ONTARIO N1H 6M7)
12. USE THE RIGHT MACHINE. Don’t force a machine
or an attachment to do a job for which it was not
designed. Damage to the machine and/or injury may
result.
13. USE RECOMMENDED ACCESSORIES. The use of
accessories and attachments not recommended by
Delta may cause damage to the machine or injury to the
user.
14. USE THE PROPER EXTENSION CORD. Make sure
your extension cord is in good condition. When using an
extension cord, be sure to use one heavy enough to
carry the current your product will draw. An undersized
cord will cause a drop in line voltage, resulting in loss of
power and overheating. See the Extension Cord Chart
for the correct size depending on the cord length and
nameplate ampere rating. If in doubt, use the next
heavier gauge. The smaller the gauge number, the
heavier the cord.
15. SECURE THE WORKPIECE. Use clamps or a vise to
hold the workpiece when practical. Loss of control of a
workpiece can cause injury.
16. FEED THE WORKPIECE AGAINST THE
DIRECTION OF THE ROTATION OF THE BLADE,
CUTTER, OR ABRASIVE SURFACE. Feeding it from
the other direction will cause the workpiece to be thrown
out a high speed.
17. DON’T FORCE THE WORKPIECE ON THE
MACHINE. Damage to the machine and/or injury may
result.
18. DON’T OVERREACH. Loss of balance can make
you fall into a working machine, causing injury.
19. NEVER STAND ON THE MACHINE. Injury could occur if
the tool tips, or if you accidentally contact the cutting tool.
20. NEVER LEAVE THE MACHINE RUNNING
UNATTENDED. TURN THE POWER OFF. Don’t leave the
machine until it comes to a complete stop. A child or visitor
could be injured.
21. TURN THE MACHINE “OFF”, AND DISCONNECT THE
MACHINE FROM THE POWER SOURCE before installing
or removing accessories, before adjusting or changing
set-ups, or when making repairs. An accidental start-up
can cause injury.
22. MAKE YOUR WORKSHOP CHILDPROOF WITH
PADLOCKS, MASTER SWITCHES, OR BY
REMOVING STARTER KEYS. The accidental start-up
of a machine by a child or visitor could cause injury.
23. STAY ALERT, WATCH WHAT YOU ARE DOING,
AND USE COMMON SENSE. DO NOT USE THE
MACHINE WHEN YOU ARE TIRED OR UNDER THE
INFLUENCE OF DRUGS, ALCOHOL, OR
MEDICATION. A moment of inattention while operating
power tools may result in injury.
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.
FAILURE TO FOLLOW THESE RULES MAY RESULT IN SERIOUS PERSONAL INJURY.
ADDITIONAL SAFETY RULES
FOR ABRASIVE FINISHING MACHINES
SAVE THESE INSTRUCTIONS.
Refer to them often and use them to instruct others.
1. DO NOT OPERATE THIS MACHINE UNTIL it is
assembled and installed according 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. USE THE GUARDS WHENEVER POSSIBLE.
Check to see that they are in place, secured, and
working correctly.
5. CHECK BELTS for wear and tension. If the belt is
damaged or can’t be tensioned properly, replace it.
6. CHECK FOR CORRECT BELT INSTALLATION,
and insure that the belt is tracking properly.
7. KEEP ARMS, HANDS, AND FINGERS away from
abrasive surfaces.
8. AVOID AWKWARD OPERATIONS AND HAND
POSITIONS where a sudden slip could cause a
hand to contact the sanding surface.
9. NEVER WEAR GLOVES or hold the workpiece
with a rag when sanding.
10. NEVER START THE MACHINE with the
workpiece against the sanding surface.
11. NEVER START THE MACHINE before clearing the
table of all objects (tools, scrap pieces, etc.).
12. MAINTAIN MINIMUM CLEARANCE between the
table and the sanding surface.
13. USE A BACKSTOP when using the belt finishing
machine in a horizontal position.
14. FEED THE WORKPIECE AGAINST THE
ROTATION OF THE SANDING SURFACE. Hold
the workpiece securely on the table.
15. USE A DUST COLLECTION SYSTEM.
16. CLEAN THE MACHINE AND DUST
COLLECTION SYSTEM THOROUGHLY BEFORE
AND AFTER SANDING METAL. Combining wood
dust and metal filings (or aluminum filings and
metal filings) can create a fire hazard. DO NOT
sand magnesium. It is highly flammable.
17. FOR DRUM SANDERS, DO NOT SAND
WORKPIECES SHORTER THAN 7" or thinner
than 1/32".
18. PROPERLY SUPPORT LONG OR WIDE
workpieces.
19. DISCONNECT THE MACHINE from the power
source before installing or removing accessories,
before adjusting or changing set-ups, or when making
repairs.
20. DISCONNECT THE MACHINE from the power
source, and clean the table/work area before leaving
the machine. LOCK THE SWITCH IN THE “OFF”
POSITION to prevent unauthorized use.
21. 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.
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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. Before connecting the
machine to the power line, make sure the switch is “OFF” and be sure that the electric current is of the same
characteristics as indicated on the machine. All line connections should make good contact. Running on low voltage
will damage the machine.
DO NOT EXPOSE THE MACHINE TO RAIN OR OPERATE THE MACHINE IN DAMP LOCATIONS.
2. Grounded, cord-connected machines intended for use
on a supply circuit having a nominal rating between 150
- 250 volts, inclusive:
If the machine is intended for use on a circuit that has an
outlet that looks like the one illustrated in Fig. C, the
machine will have a grounding plug that looks like the
plug illustrated in Fig. C. Make sure the machine is
connected to an outlet having the same configuration as
the plug. No adapter is available or should be used with
this machine. If the machine must be re-connected for
use on a different type of electric circuit, the reconnection should be made by qualified service
personnel; and after re-connection, the machine should
comply with all local codes and ordinances.
IN ALL CASES, MAKE CERTAIN THE
RECEPTACLE IN QUESTION IS PROPERLY
GROUNDED. IF YOU ARE NOT SURE HAVE A
QUALIFIED ELECTRICIAN CHECK THE RECEPTACLE.
1. All grounded, cord-connected machines:
In the event of a malfunction or breakdown, grounding
provides a path of least resistance for electric current to
reduce the risk of electric shock. This machine is
equipped with an electric cord having an equipmentgrounding conductor and a grounding plug. The plug must
be plugged into a matching outlet that is properly installed
and grounded in accordance with all local codes and
ordinances.
Do not modify the plug provided - if it will not fit the outlet,
have the proper outlet installed by a qualified electrician.
Improper connection of the equipment-grounding
conductor can result in risk of electric shock. The
conductor with insulation having an outer surface that is
green with or without yellow stripes is the equipmentgrounding conductor. If repair or replacement of the
electric cord or plug is necessary, do not connect the
equipment-grounding conductor to a live terminal.
Check with a qualified electrician or service personnel if
the grounding instructions are not completely
understood, or if in doubt as to whether the machine is
properly grounded.
Use only 3-wire extension cords that have 3-prong
grounding type plugs and matching 3-conductor
receptacles that accept the machine’s plug, as shown in
Fig. C.
Repair or replace damaged or worn cord immediately.
POWER CONNECTIONS
MOTOR SPECIFICATIONS
Your machine is wired for 220 volt, 60 HZ alternating current. Before connecting the machine to the power source,
make sure the switch is in the “OFF” position.
GROUNDING INSTRUCTIONS
THIS MACHINE MUST BE GROUNDED WHILE IN USE TO PROTECT THE OPERATOR FROM
ELECTRIC SHOCK.
GROUNDED OUTLET BOX
Fig. C
CURRENT
CARRYING
PRONGS
GROUNDING BLADE
IS LONGEST OF THE 3 BLADES
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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. 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.
EXTENSION CORDS
FOREWORD
Delta Model 31-396 is an Oscillating Edge Sander. The model 31-396 is powered by a 3 H.P., 220 volt single phase motor.
The oscillating edge belt can be positioned anywhere from 0 degrees to the table to 90 degrees to the table. The model
31-396 also comes with a spindle sander attachment kit that is used for sanding curved surfaces.
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
0-6 240
up to
50 18 AWG
0-6 240 50-100 16 AWG
0-6 240 100-200 16 AWG
0-6 240 200-300 14 AWG
6-10 240
up to
50 18 AWG
6-10 240 50-100 16 AWG
6-10 240 100-200 14 AWG
6-10 240 200-300 12 AWG
10-12 240
up to
50 16 AWG
10-12 240 50-100 16 AWG
10-12 240 100-200 14 AWG
10-12 240 200-300 12 AWG
12-16 240
up to
50 14 AWG
12-16 240 50-100 12 AWG
12-16 240
GREATER THAN 100 FEET NOT RECOMMENDED
FUNCTIONAL DESCRIPTION
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.
NOTICE: THE MANUAL COVER PHOTO ILLUSTRATES THE CURRENT
PRODUCTION MODEL. ALL OTHER ILLUSTRATIONS ARE REPRESENTATIVE
ONLY AND MAY NOT DEPICT THE ACTUAL COLOR, LABELING OR
ACCESSORIES AND MAY BE INTENDED TO ILLUSTRATE TECHNIQUE ONLY.
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1. Open door (A) Fig. 1, on front of machine, by sliding
latch lock (B) back, and pulling out on door.
Fig. 1
A
B
2. Remove the two screws (C) Fig. 2, and remove the
sanding fence (D).
Fig. 2
C
D
Fig. 3
3. Lift up on hook (H) Fig. 3, and remove the shelfs (J)
and (K).
H
J
K
Fig. 4
4. Remove the four screws that attach the sander base
to the shipping skid. Note: Two of the screws are shown
at (L) Fig. 4.
L
5. THE MACHINE IS EXTREMELY
HEAVY. HAVE FOUR OR MORE PEOPLE LIFT THE
MACHINE OFF THE SHIPPING SKID.
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OSCILLATING EDGE SANDER PARTS
Fig. 5
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
1. Fence
2. Table Assembly
3. Cover
4. Miter Gage
5. Back Stop
6. Dust Port
7. 4" Hose Connector
8. Spindle
9. 1½" Dia. Drum
10. 2" Dia. Drum
11. 3” Dia. Drum
12. 3" Table Insert
13. 2" Table Insert
14. 1½" Table Insert
15. Sanding Belt
16. Ratchet Handle
17. Fence Knob (2)
18. 5/16-18 x 1-1/4" Socket Head Screw (1) (maintenance)
19. 5/16-18 x 1" Hex Head Screw (2)
20. 5/16-18 x 1/2" Hex Head Screw (1)
21. 1/4-20 x 1-3/4" Socket Head Screw (2) (maintenance)
22. 1/4-20 x 3/8" Round Head Screw (4)
23. 5/16" Spindle Washer (1)
24. 5/16" Flat Washer (4)
25. 17/64" Flat Washer (4)
26. Plate (maintenance)
27. Hinge Pin (2)
28. 10mm x 12mm Open End Wrench
29. M6 Hex Wrench
30. M5 Hex Wrench
31. Rod
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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.
BELT
Fig. 6
Fig. 8
Fig. 9
1. Remove knobs (C) and (D) Fig. 6.
2. Open latch (B) Fig. 6, and carefully lower cover (F).
3. Open latch (A) Fig. 6, and carefully lower cover (E).
4. Pull out belt tension lever (G) Fig. 8.
5. NOTE: MAKE SURE THE ROTATION ARROW ON
THE INSIDE OF THE BELT IS POINTING IN THE
SAME DIRECTION AS THE ROTATION ARROW ON
THE MACHINE. Place belt (K) over the two belt drums
(H) and (J) Fig. 9. Make sure the belt is centered on the
drums.
A
B
C
D
E
F
G
K
H
J
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