Master Quality Power PT20003 User manual

3" Buffer Grinder
Item #: PT20003
INSTRUCTION MANUAL
www.masterquality.com
909-590-5885

PRODUCT SPECIFICATIONS
SAVE THIS MANUAL
You will need this manual for the safety warnings and precautions, assembly, operating,
inspection, maintenance and cleaning procedures, parts list and assembly diagram.
Keep your invoice with this manual. Write the invoice number on the inside of the front
cover. Keep this manual and invoice in a safe and dry place for future reference.
GENERAL SAFETY RULES
WARNING!
READ AND UNDERSTAND ALL INSTRUCTIONS
Failure to follow all instructions listed below may result in
electric shock, fire, and/or serious injury.
SAVE THESE INSTRUCTIONS
WORK AREA
1. Keep your work area clean and well lit. Cluttered benches and dark areas
invite accidents.
2. Do not operate power tools in explosive atmospheres, such as in the
presence of flammable liquids, gases, or dust. Power tools create sparks
which may ignite the dust or fumes.
Item Description
Electrical Requirements Power Input: 120VAC/60Hz , 0.4A
Motor: Single Speed / 3450 RPM
Power Cord Length: 8 Feet
Power Cord Plug Type: 3 Prong, Grounded
Power Switch Type: On/Off Rocker Switch
Grinding Wheel 3” Diameter x 1/2” Thick / 80 Grit / Aluminum Oxide
Buffing Wheel 3” Diameter x 12/17”(19mm) Thick / Cotton
Arbor Size 1/2” Diameter
Mounting Holes 1/4” (6mm)Diameter
Additional Features Non-Slip Rubber Pads (Removable),/ Tool Rest / Spark Shields
Accessories 8MM ,10MM Spanner Wrench / Flexible shaft
Overall Dimensions 5-1/8” H x 6-1/2” W x 4-1/2” D
Unit Weight 5 Pounds
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3. Keep bystanders, children, and visitors away while operating a power tool.
Distractions can cause you to lose control. Protect others in the work area from
debris such as chips and sparks. Provide barriers or shields as needed.
ELECTRICAL SAFETY
4. Grounded tools must be plugged into an outlet properly installed and
grounded in accordance with all codes and ordinances. Never remove the
grounding prong or modify the plug in any way. Do not use any adapter
plugs. Check with a qualified electrician if you are in doubt as to whether
the outlet is properly grounded. If the tools should electrically malfunction or
break down, grounding provides a low resistance path to carry electricity away
from the user.
5. Double insulated tools are equipped with a polarized plug (one blade is
wider than the other). This plug will fit in a polarized outlet only one way. If
the plug does not fit fully in the outlet, reverse the plug. If it still does not
fit, contact a qualified electrician to install a polarized outlet. Do not
change the plug in any way. Double insulation eliminates the need for the
three wire grounded power cord and grounded power supply system.
6. Avoid body contact with grounded surfaces such as pipes, radiators,
ranges, and refrigerators. There is an increased risk of electric shock if your
body is grounded.
7. Do not expose power tools to rain or wet conditions. Water entering a power
tool will increase the risk of electric shock.
8. Do not abuse the Power Cord. Never use the Power Cord to carry the tools
or pull the Plug from an outlet. Keep the Power Cord away from heat, oil,
sharp edges, or moving parts. Replace damaged Power Cords immediately.
Damaged Power Cords increase the risk of electric shock.
9. When operating a power tool outside, use an outdoor extension cord
marked “W-A” or “W”. These extension cords are rated for outdoor use, and
reduce the risk of electric shock.
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UNPACKING
When unpacking, check to make sure all the listed parts are included. If any parts are missing
or broken, please call Master Quality at the number shown on the cover of this manual as soon
as possible.
ASSEMBLY INSTRUCTIONS
1. WARNING! Make sure the Power Switch of the Grinder is in its
“OFF” position and its Power Cord/Plug is unplugged from the
electrical outlet prior to performing any assembly.
To adjust the work rest
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THE WORK REST IS RRE-FIXED IN VERTICLE POSITION FOR PROTECTION PURPOSE, YOU NEED ADJUST THEM TO THE WORKING
POSITION
TO DO SO, YOU NEED LOOSE THE WING NUTS WHICH FIXING THE WORK RESTS, THEN ROTATE THEM TO THE FLAT POSITION,
AND THEN ADJUST THEM TO THE MIN., 1/16"(1.6MM) DISTANCE TO THE WHEEL

To Attach The Spark Shields:
1. A Spark Shield must be attached to both the Left Safety Guard Plate
and Right Safety Guard Plate . To do so, for each Spark Shield use two
Philips Screw , two Flat Washer , two Spring Washer , and two Hex
Nut . (See Figure E.)
SPARK SHIELD
MOVEABLE TOOL REST
OF
FIGURE E
1. CAUTION! Make sure the workbench on which the Grinder will be mounted
is flat, level, and sturdy enough to support the weight of the Grinder, any
workpieces, and any additional tools.
2. The Grinder is equipped with four Rubber Feet which allows the tool to be
temporarily placed upon a workbench for use. However, if the Grinder is to be
permanently mounted on a workbench, the Rubber Feet must be removed.
(See Assy. Diagram.)
3. To permanently mount the Grinder on a workbench, remove the Rubber Feet
and place the Grinder in the desired work location on the workbench. Use the
four mounting holes at the Base as a template to mark the areas where four
3/16” diameter mounting holes should be drilled through the workbench.
4. Temporarily remove the Grinder, and drill the four 3/16” diameter mounting holes
To Mount The Grinder On A Workbench:
EYE SHIELD
FLEXIBLE SHAFT
SWITCH
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through the workbench, making sure no hidden electric cords or cables are in the
drilling path.
5. Once the 3/16” mounting holes are drilled, align the four mounting holes at the
Base of the Grinder with the four pre-drilled mounting holes in the workbench.
Secure the Grinder to the workbench, using four appropriate length Bolts, Lock
Washers, and Nuts (not included). (See Assy. Diagram.)
OPERATING INSTRUCTIONS
1. Connect the Power Cord/Plug of the Grinder to the nearest 120 volt,
grounded, electrical outlet. (See Figure F.)
2. WARNING! ALWAYS wear ANSI approved safety impact eye glasses
underneath an ANSI approved safety impact full face shield when operating the
Grinder.
3. Turn the Power Switch to its “ON” position, and allow the Buffing Wheel
and Grinding Wheel to spin up to full speed. (See Figure F.)
4. Place the object you are buffing or grinding firmly against the Moveable Tool Rest
and slowly feed the object into the revolving Buffing Wheel or Grinding Wheel .
(See Figure F.)
5. CAUTION! Make sure to keep hands and fingers away from the Buffing
Wheel and Grinding Wheel . Also, make sure to hold the object you are
buffing or grinding firmly against the Moveable Tool Rest throughout the
buffing/grinding process. Failure to do so may cause the object to be propelled
by the Buffing Wheel or Grinding Wheel toward your body and/or into the Grinder.
(See Figure F.)
GRINDING WHEEL
BUFFING WHEEL
ON
OFF
POWER SWITCH
MOVEABLE
TOOL REST
FIGURE F
shaft
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6. Once the grinding process is competed, turn the Power Switch of the Grinder
to its “OFF” position. Do not press against the Buffing Wheel or Grinding
Wheel to stop them from spinning. Allow the Wheels to completely stop on
their own. Then, disconnect the Power Cord/Plug from its electrical
outlet. (See Figure F.)
7. Always make sure the Grinder is kept in an area out of reach of children and
other unauthorized people.
INSTALLATION THE FLEXIBLE SHAFT AND BITS
Switch machine OFF and remove the electric cord form the power source.
Remove the cover and mount the flexible shaft .
Insert the flexible shaft wrench in the hole of the handle to stop the rotation of
the shaft.
Turn the collect nut until the flexible shaft wrench engages the hole in the
shaft.
Insert the bit into the collet to prevent the bit from coming out of the tool while
in use.
Tighten the collet nut securely with wrench provided.
Remove the flexible shaft wrench.
OPERATING THE FLXIBLE SHAFT
Follow allow the tool to operating the tool.
Always allow the tool to operate as it was designed. Never force the flexible
shaft.
Clamp or other wise secure the work to prevent it from shifting .
Hold the tool tightly and keep it a safe distance from shifting .
Ensue that ventilation openings are kept clear when working in dust condi
tions .If it’s necessary to clear dust of inside parts ,disconnect the tool from
the power supply first and avoid damaging internal parts
Slow speed is best for polishing operations, delicate woodcarving ,or working
on fragile model parts.
High speed is suitable for operation on hardwoods, metals and glass, such
as carving ,routing , shaping, cutting and drilling.
AFTER OPERATION
Do not touch the moving part when the flexible shaft is just switched off.
Do not put down your tool before the working head stops rotating .
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6. To clean: Wipe with a damp cloth, vacuum or use compressed air. Do not use
solvents. Do not immerse any part of the Grinder in liquids.
7. When storing: Store the Grinder in a safe, clean, dry, location out of reach of
children and other unauthorized people.
8. AUTION! All maintenance, service, or repairs not listed in this manual
are only to be attempted by a qualified service technician
INSPECTION, MAINTENANCE, AND CLEANING
1. WARNING! Always turn the Grinder’s Power Switch to its “OFF”
position and unplug the tool from its electrical outlet before performing any
inspection, maintenance, or cleaning.
2. Before each use: Inspect the general condition of the Grinder. Check for
misalignment or binding of moving parts, loose, cracked or broken parts,
damaged Power Cord, and any other condition that may affect its safe operation.
If a problem occurs with the Grinder, have the problem corrected before further
use. Do not use damaged equipment.
3. To install a Buffing Wheel : Note: Use both Spanner Wrenches when
installing and removing Buffer and Grinding Wheels. To install a new Buffing
Wheel , remove the Seal Ring from the Grinder. Unscrew and remove
the Hex Nut . IMPORTANT: The Hex Nut on the Buffing Wheel is a LEFT
threaded Hex Nut. To remove, turn the Hex Nut
clockwise
. To tighten, turn the
Hex Nut
counterclockwise
. Remove the Left Safety Guard Cover . Remove
the Flange and Shaft Sleeve . Then, remove the old Buffing Wheel.
Install the new Buffing Wheel. Then, replace the Shaft Sleeve, Flange, Left
Safety Guard Cover, Hex Nut, and Seal Ring. (See Assy. Diagram.)
4. To install a Grinding Wheel : To install a new Grinding Wheel , remove
the Seal Ring from the Grinder. Unscrew and remove the Hex Nut .
IMPORTANT: The Hex Nut on the Grinding Wheel is a RIGHT threaded Hex Nut.
To remove, turn the Hex Nut
counterclockwise
. To tighten, turn the Hex Nut
clockwise
. Remove the Right Safety Guard Cover . Remove the Flange
and Shaft Sleeve . Then, remove the old Grinding Wheel. Install the new
Grinding Wheel. Then, replace the Shaft Sleeve, Flange, Right Safety Guard
Cover, Hex Nut, and Seal Ring. (See Assy. Diagram.)
5. AUTION! When replacing the Buffing Wheel and/or Grinding Wheel
make sure each wheel has a minimum 3500 RPM rating. When replacing
the Grinding Wheel , do not over tighten the Hex Nut . Excessive tightening can
cause the Grinding Wheel to crack during operation.
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