Alpha Professional Tools VDP-700 User manual

Model No.: VDP-700
Alpha®Variable Speed
Rotary Polisher
Instruction Manual
MANUAL
WARNING: To reduce the risk of injury, user must read and understand instruction manual!
103 Bauer Drive, Oakland, NJ 07436 • 800-648-7229 • Fax: [phone]
www.alpha-tools.com
Version 1

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Introduction.......................................................................................................... 2
About Symbols......................................................................................... 2
Electrical Symbols ............................................................................................... 2
General Safety Rules ......................................................................................... 3
Electrical Safety ....................................................................................... 4
Tool Use and Care ................................................................................... 4
Service..................................................................................................... 5
Specific Safety Rules............................................................................... 5
Use Proper Extension Cords ................................................................... 7
Laws and Regulations of Noise Levels.................................................... 8
VDP-700 Overview.............................................................................................. 9
Specifications........................................................................................... 9
Equipment Included........................................................................................... 10
Components........................................................................................... 10
Maintenance...................................................................................................... 11
Periodic.................................................................................................. 11
Bearings and gears................................................................................ 11
Carbon Brush Replacement................................................................... 11
VDP-700 Variable Speed Rotary Polisher Operation ........................................ 13
Switching ON and OFF.......................................................................... 13
Variable Speed Adjustment.................................................................... 14
How to attach the Rotary Backer Pad ............................................................... 15
Spindle Lock .......................................................................................... 15
How to Remove the Rotary Backer Pad............................................................ 16
Alpha® VDP-700 Schematic .............................................................................. 17
Alpha® VDP-700 Parts List ................................................................................ 18
Accessories and Factory Service ...................................................................... 20
Warranty ............................................................................................................ 20
Product Registration Card ................................................................................. 21
TABLE OF CONTENTS

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INTRODUCTION
Thank you for purchasing the Alpha® Variable Speed Rotary Polisher. Please
read this instruction manual thoroughly to ensure safety and correct use of the
rotary polisher. Keep this manual in a place where operators can access it easily
whenever necessary.
ABOUT THE SYMBOLS
According to the hazard level, all safety notes in this manual are classified into
“DANGER”, “WARNING”, and “CAUTION”.
DANGER! Death or serious personal injury is imminent when handling this
rotary polisher incorrectly.
WARNING! There is a possibility of death or serious personal injury when
handling this rotary polisher incorrectly.
CAUTION! There is a possibility of personal injury or property damage when
handling this rotary polisher incorrectly.
NOTE: In some situations, failing to observe WARNING notes could result in
death or serious personal injury. Be sure to read and observe the safety notes
to ensure safety and correct use of the rotary polisher.
ELECTRICAL SYMBOLS
The following show the symbols used for tool.
V Volts
A Amperes
W Watts
Hz Hertz
~ or a.c. Alternating Current
n0 No load speed
…/min Revolution or reciprocation per minute
kg Kilograms
mm Millimeters
lbs Pounds
Protective Earth

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CAUTION
The following are important notes for products, operation, and maintenance
applicable to this rotary polisher.
GENERAL SAFETY RULES
1. KNOW YOUR POWER TOOL. Read owner’s manual carefully. Learn its
applications and limitations as well as specific potential hazards particular to
this tool.
2. KEEP WORK AREA CLEAN. Cluttered areas and benches invite accidents.
3. AVOID DANGEROUS ENVIRONMENTS. Keep work areas as dry as possible.
Do not use tool in presence of ammable liquids or gases. Keep the area well lit.
4. KEEP CHILDREN AND VISITORS AWAY. All visitors should be kept a safe
distance from the work area. Keep out of reach of children.
5. DON’T FORCE TOOL. It will do the job better and safer at the rate for which
it was designed.
6. WEAR PROPER APPAREL. Do not wear loose clothing or jewelry as it can
get caught in moving parts. Rubber gloves and insulated non-skid footwear
are recommended. Wear protective covering to contain long hair.
7. WEAR PROPER EYE PROTECTION. All users and bystanders must always
wear proper personal eye protection which conform with ANSI/ISEA Z87.1
(CAN/CSA Z94.3). Also use a face or dust mask if operation is dusty. Always
wear certified safety equipment.
8. WEAR PROPER EAR PROTECTION. All users and bystanders must wear
proper personal ear protection which conforms with ANSI S12.6 (S3.19) hearing
protection.
9. WEAR PROPER RESPIRATORY PROTECTION. All users and bystanders
must wear proper personal respiratory protection. Always use NIOSH/
OSHA approved respiratory protection appropriate for the dust exposure.
Warning: Some dust created by power sanding, sawing, grinding, drilling,
polishing and other construction activities contains chemicals known to the
State of California to cause cancer, birth defects, or other reproductive harm.
Some examples of these chemicals are:
— Lead from lead-based paints
— Crystalline silica from bricks, 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, work in a well ventilated area, and work with
approved safety equipment, such as dust masks that are specially designed to filter
out microscopic particles. To familiarize with the risks associated with a material,
consult with your employer, manufacturer/supplier and government agencies
regarding the hazards of the materials and their recommendations to protect yourself.

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10. ALWAYS SECURE WORK PIECE. Use clamps or a vise to hold work. It’s safer
than using your hand and it frees both hands to operate tool.
11. DON’T OVERREACH. Keep proper footing and balance at all times.
12. DISCONNECT TOOLS WHEN NOT IN USE. Always disconnect tool before
servicing when changing blades.
13. REMOVE ADJUSTING KEYS AND WRENCHES. Form a habit of checking to
see that keys and adjusting wrenches are removed from tool before turning it on.
14. MAINTAIN TOOLS WITH CARE. Keep tools clean at all times for best
and safest performance. Follow instructions for lubricating and changing
accessories. Keep handles dry, clean and free of oil or grease. Inspect moving
parts for alignment and binding as well as for breakage and improper mounting.
15. AVOID ACCIDENTAL STARTING. Do not carry a “connected” tool, or make
adjustments, or change discs without making sure the tool is disconnected
from the power supply.
16. USE ONLY RECOMMENDED ACCESSORIES. The use of any accessories
other than what is listed or recommended for this particular tool may be
hazardous.
17. KEEP HANDS AWAY FROM ALL MOVING PARTS.
18. USE SIDE HANDLES. Supplied with tool for control and safety.
19. STAY ALERT. Watch what you are doing and use common sense. Do not
operate tool when you are tired, or under the inuence of medication or alcohol.
ELECTRICAL SAFETY
• Make sure the 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.
• Do not abuse the cord. Never use the cord to carry the tools or pull the plug
from an outlet/receptacle. Keep cord away from heat, oil, sharp edges, or
moving parts. Replace damaged cords immediately. Damaged cords increase
the risk of electric shock or fire.
• When operating a power tool outside, use an outdoor extension cord
marked “W-A” or “W”. These cords are rated for outdoor use and reduce
the risk of electric shock.
TOOL USE AND CARE
• Use clamps or other practical ways to secure and support the workpiece
to a stable platform. Holding the work by hand or against your body is unstable
and may lead to loss of control.
• Inspect for and remove all foreign objects from workpiece before
polishing. Following this rule will reduce the risk of serious personal injury.
• Avoid accidental starting. Be sure switch is off before plugging in. Carrying

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tools with your finger on the switch or plugging in tools that have the switch
on, invites accidents.
• Keep hands away from polishing area. Following this rule will reduce the
risk of cuts, scrapes, or serious personal injury.
• Hold tool by insulated gripping surfaces when performing an operation
where the rotary polisher may contact hidden wiring or its own cord.
Contact with a “live” wire will make exposed metal parts of the tool “live” and
shock the operator.
• Do not force tool, use the correct tool for your application. The correct
tool will do the job better and safer at the rate for which it is designed.
• Do not use tool if switch does not turn it on or off. Any tool that cannot be
controlled with the switch is dangerous and must be repaired.
• Disconnect the plug from power source before making any adjustments,
changing accessories, or storing the tool. Such preventive safety measures
reduce the risk of starting the tool accidentally.
• Check for damaged parts. Before further use of the tool, check the guard
or other part to determine if it is damaged or that it will operate properly and
perform its intended function. Check for alignment 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
by an authorized service center unless otherwise indicated elsewhere in this
instruction manual. Have defective switches replaced by authorized service
center.
• Store idle tools out of the reach of children and other untrained persons.
Tools are dangerous in the hands of untrained users.
• Know your power tool. Read operator`s manual carefully. Learn its
applications and limitations, as well as the specific potential hazards related
to this tool. Following this rule will reduce the risk of electric shock, fire, or
serious injury. Refer to them frequently and use them to instruct others who
may use this tool. If you loan someone this tool, loan them these instructions.
SERVICE
• Tool service must be performed only by qualified repair personnel. Service or
maintenance performed by unqualified personnel could result in a risk of injury.
• When servicing a tool, use only identical replacement parts. Follow instructions
in the Maintenance section of this manual. Use of unauthorized parts or failure
to follow maintenance instructions may create a risk of electric shock or injury.
SPECIFIC SAFETY RULES
1. Accessories must be rated for at least the speed recommended on the
tool warning label. Wheels and other accessories running over rated speed
can y apart and cause injury.
2. Hold tool by insulated gripping surfaces when performing an operation
where the rotary polisher may contact hidden wiring or its own cord.

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Contact with a “live” wire will make exposed metal parts of the tool “live” and
shock the operator.
3. Always wear safety glasses with side shields. Everyday eye-glasses have
only impact resistant lenses; they are NOT safety glasses.
4. Protect your lungs. Wear a face or dust mask if the operation is dusty.
5. Protect your hearing. Wear hearing protection during extended periods of
operation.
6. Inspect tool cords periodically and if damaged, have repaired at your
nearest Factory Service Center or other Authorized Service Organization.
Constantly stay aware of cord location.
7. Check damaged parts. Before further use of the tool, a guard or other part
that is damaged should be carefully checked to determine that it will operate
properly and perform its intended function.
8. 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
by an authorized service center.
9. Do not abuse cord. Never carry the tool by the cord or yank it to disconnect
it from the receptacle. Keep cord away from heat, oil, and sharp edges.
Following this rule will reduce the risk of electric shock or fire.
10. 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.
11. Inspect for and remove all foreign objects from workpiece before
polishing. Follow this rule will reduce the risk of serious personal injury.
12. Drugs,alcohol,medication,Donotoperatetoolwhileundertheinfluence
of drugs, alcohol, or any medication. Follow this rule will reduce the risk of
electric shock, fire, or serious personal injury.
13. Keep hands away from polishing area. Follow this rule will reduce the risk
of cuts, scrapes, or serious personal injury.
14. Save these instruction. Refer to them frequently and use them to instruct
others who may use this tool. If you loan someone this tool, loan them these
instructions.

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USE PROPER EXTENSION CORDS
Make sure the extension cord is in good condition. Replace or repair damaged or
worn cord immediately. When using an extension cord, be sure to use one heavy
enough to carry the current that the tool will draw. An undersized cord will cause a
drop in line voltage resulting in loss of power and overheating. Below table shows
the correct size to use depending on cord length and nameplate ampere rating. If
in doubt, use the next heavier gauge. The smaller the gauge number, the heavier
the cord.
Ampere Rating Total length of cord in feet (120V )
25ft 50ft 100ft
More Than Not More Than AWG
0 6 18 16 16
610 18 16 14
10 12 16 16 14
12 16 14 12 Not Recommended
DANGER!
1. Check the working voltage. Be sure the voltage available at power outlet
matches specified voltage on the name- plate. If the polisher is used with
higher voltage than specified, the motor will burnout. Any attempts to do so
may damage the polisher or cause an accident or injury.
2. Hold the polisher tightly at start-up. Failure to do so may cause an injury
due to high impact at initial start up.
3. Stop using the polisher immediately when noticing any malfunctions or
any suspicious abnormal noises. Turn the power switch OFF and contact
your dealer or Alpha Professional Tools® for repair.
4. Handle the polisher with care. If you accidentally drop the polisher, do not
use it until checking that it is not cracked, deformed, or damaged in any way.
5. Do not pour water or any liquids onto or inside the polisher. It may
cause electric shocks.
6. Do not hold the polisher in a vice.
7. Do not touch any rotating parts. Never touch the polishing disc of the
polisher during operation with your hands.
8. Donotleavethediscwhilespinningonthebench,floororsurfaceof
your workpiece. It may cause an accident or injury.
9. Attach the backer pad and accessories correctly by following the

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procedure in this instruction manual. Attaching the backer pads and
accessories incorrectly may cause an accident.
10. Observe any suspicious abnormal noises when a polishing disc is
attachedforthefirsttimeandpolisheristurnedON.It may cause
bodily injury if the polishing disc ies off.
11. Do not touch the backer pad while spinning. The backer pad spins very
fast and can cause injury.
12. Be careful of your surroundings when working in high places. When
working in high places, make sure there are no people below. Do not strap
the power supply cord on anything or drop the polisher or any materials,
otherwise, It may cause an accident.
LAWS AND REGULATIONS OF NOISE LEVELS
Please observe local laws and regulations regarding noise level in order to avoid
disturbing surrounding areas. Install a soundproof wall if required to comply with
the local laws and regulations.

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VDP-700 OVERVIEW
SPECIFICATIONS:
Model ...................................................................................VDP-700
Rating ..................................................................................120 Volts
Amperage .................................................................................11.0A
Power.........................................1250W (Rated), 1900W (Maximum)
No Load Speed (Variable).................. 700~3500 RPM with Soft Start
Weight.......................................................................... 6.4 lbs/2.9kgs
Spindle.................................................................................... 5/8”-11
Power Supply.......................................... Single-phase AC, 50/60 Hz
Plug Type..............................................................................A (120V)
Cord ..................................................................25ft / 7.6m (14 AWG)
Backing Plate Size........................................ 7” / 178mm (Maximum)
Polishing Disc Size ....................................... 9” / 228mm (Maximum)

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EQUIPMENT INCLUDED
COMPONENTS
1. Side Handle .......................................................................1 pc
2. Open-End Wrench / 17mm ................................................1 pc
3. Hex. Wrench / 8mm ...........................................................1 pc
4. C-Handle w/ Mounting Screws...........................................1 pc
5. Extra Carbon Brush Set .....................................................1 pc
2
1
5
4
3

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MAINTENANCE
PERIODIC
WARNING!
Preventive maintenance preformed by unauthorized personnel may result in
misplacing of internal wires and/or components which voids the warranty and could
cause serious hazards. We recommend that tool service and repairs not covered
in the manual be preformed by an Alpha® Repair Center.
Periodic maintenance is done to check the tool and to minimize down time. These
checks are done based on hours of operation and operating conditions. Operating
condition can vary depending on the work surface and job being preformed. If the
tool is not used for a long period of time the carbon brushes should be checked and
the commutator cleaned, before putting the tool back into operation.
BEARINGS AND GEARS
To minimize your tool’s down time and expensive tool repairs, it is recommended
to send the tool back to an Alpha® Repair Center after about 300 to 400 hours
of operation or every second carbon brush set change. The bearings should be
replaced and the gears should be checked. If your tool starts to sound differently, this
could be an indication of a worn bearing; continuing to use the tool in this condition
could result in over heating or motor failure.
CARBON BRUSH REPLACEMENT
Carbon brushes wear out over time, based on the polisher usage. If a carbon brush
is worn out, it may cause the motor to malfunction or fail to run. Whenever the length
of the carbon brush reaches the wear limit, replace with a new set.
NOTE - To maintain even wear, both brushes should be replaced at the same time.

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REPLACING AND CHECKING THE CARBON BRUSHES
1. Locate the Brush Holder Caps and
remove.
2. Unscrew the Brush Holder Caps
completely until carbon brush releases
from the brush holder.
3. Check the carbon brush for wear.
Replace if worn down to a 1/4” or if spring is damaged.
4. Install the new Carbon Brush with the proper alignment into the brush holder
then reinstall the Brush Holder Caps.
5. Fully tighten the Brush Holder Cap back onto the Brush Holder.

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VDP-700 VARIABLE SPEED ROTARY POLISHER
OPERATION
SWITCHING ON AND OFF
Before plugging in the tool, always check the working voltage. Be sure that the
voltage specified is on the name plate.
Intermittent use:
Switching ON: Press the trigger switch.
Switching OFF: Release the trigger switch
Continuous use:
Switching ON:
Press the trigger switch and push the locking button to lock the trigger switch.
Switching OFF:
Press the trigger switch and the locking button will disengage.
DANGER!
Locking Button
Trigger Switch

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VARIABLE SPEED ADJUSTMENT
The rotary polisher features a dial speed control, which controls the polisher’s
maximum rotations per minute. The speed will remain variable to the chosen dial
setting by use of the trigger switch. Dial settings range from 1 through 6. Lower
numbers correspond to lower speeds and higher numbers correspond to higher
speeds. Use the setting that best suits your job. To control the speed, set the dial
to the desired number.
1 2 3 4 5 6
700
1300
1900
2500
3000
3500 Speed/Level
SOFT START
Increase Speed
Decrease Speed

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HOW TO ATTACH THE ROTARY BACKER PAD
The Rotary Backer Pads can be attached and removed from the spindle by the
following two methods.
SPINDLE LOCK
TURN OFF AND DISCONNECT FROM POWER SUPPLY.
A spindle lock button has been provided in the gear head to prevent the spindle
from rotating when installing or removing rotary backer pads. Operate the spindle
lock only when the tool is turned off, unplugged from the power supply, and has
come to a complete stop.
To engage the lock, depress the spindle lock button and rotate the spindle until you
are unable to rotate the spindle further.
NOTICE: To reduce the risk of damage to the tool, do not engage the spindle
lock while the tool is operating. Damage to the tool will result and attached
accessory may spin off possibly resulting in injury.
OPEN-END WRENCH (17 MM)
TURN OFF AND DISCONNECT FROM POWER SUPPLY.
Insert the Open-End Wrench onto the shaft of the spindle to prevent the spindle
from rotating when installing or removing rotary backer pads.
Open-End Wrench

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WARNING!
To reduce the risk of injury, keep the cord set away from the path of the polisher.
Otherwise the cord set may become caught by pad and wrap round the spindle;
this may cut through the cord and expose live wires or make the gear box
electrically “live”
Always wear safety goggles or a face shield during operation.
HOW TO REMOVE THE ROTARY BACKER PAD
Open-End Wrench

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ALPHA®VDP-700 SCHEMATIC

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ALPHA®VDP-700 PARTS LIST
DRAWING NO. PART NO. DESCRIPTION QUANTITY
1 210145 Output Shaft 5/8”-11 1
2 210146 Screw Combo (M5x16) 4
3 210147 Gear Case Cover 1
4 210148 O-Ring 1
5 210149 Dust-Proof Washer (12x25x0.5) 1
6 210150 Ball Bearing (6201 / 2RS) 1
7 210151 Wave Spring Washer 1
8 210152 Circlip for Hole (32) 1
9 210153 Key (4x13) 1
10 210154 Gear 1
11 210155 Circlip for Shaft (12) 2
12 210156 Bushing 1
13 210157 Spindle Lock Pin 1
14 210158 Screw (M4x10) 3
15 210159 Gear Case Plastic Cover 1
16 210160 Hexagon Screw (M10x20) 2
17 210161 C-Handle 1
18 210162 Spindle Lock Cap 1
19 210163 Spindle Lock Spring 1
20 210164 Self-Tapping Screw (ST4.8x20) 4
21 210165 Gear Case 1
22 210166 Ball Bearing (6001 / 2RS) 1
23 210167 Bearing Clamp 1
24 210168 Screw (M5x10) 2
25 210169 Bearing Retainer (12x21x1) 1
26 210170 Armature 1
27 210171 Magnetic Ring (8x28x7) 1
28 210172 Ball Bearing (608 / 2RZ) 1
29 210173 Rubber Bearing Seat (608) 1
30 210174 Wind Bafe 1
31 210175 Field Coil 1

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ALPHA®VDP-700 PARTS LIST
DRAWING NO. PART NO. DESCRIPTION QUANTITY
32 210176 Self-Tapping Screw (ST4.8x65) 2
33 210178 Flag Slot (4.8) 2
34 210177 Self-Tapping Screw (ST2.9x10) 6
35 210198 Support Pad 1
36 210199 Field Coil Case 1
37 210200 RPM indicator Label 1
38 210179 Data Label VDP-700 1
39 210180 Brush Holder (6.2x13) 2
40 210181 Carbon Brush 2pc set 1
41 210182 Brush Holder Cap 2
42 210183 Speed Controller Assembly 1
43 210184 Rear Hand (Right) 1
44 210185 Self-Tapping Screw (ST4.8x16) 7
45 210186 Power Supply Cord 1
46 210187 Cord Jacket 1
47 210188 Cord Clamp 1
48 210191 Switch 1
49 210192 Rear Hand (Left) 1
50 210193 Cord Clamp 1
51 210194 Brand Label VDP-700 1
52 210195 Hex. Wrench (8mm) 1
53 210196 Open-End Wrench (17mm) 1
54 210197 Side Handle 1
55 210181 Spare Carbon Brush Set (2 pc) 1