Arc-Zone Piranha 3 User manual

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Piranha 3 Heavy-duty Precision Tungsten Electrode Grinder
Benefits:
• Solid, compact and durable construction, no vibration
• Can be used in horizontal or vertical position
• Longitudinal grinding for improved arc stability
• Consistently grinds electrode sizes from: .040” (1.0mm) to 3/16” (4.8mm)
• Included grind angle scale for quick setup and repeatability
• Electrode guide for consistent square-end (tip-flat) grinding
• Electrode notching slot, simplifies electrode cutting

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Thank you for purchasing the Piranha 3 Heavy-duty Precision Tungsten Electrode
Grinder from Arc-Zone.com. Your new grinding machine is made in the USA and
comes with a one-year warranty against manufacturing defects.
UNPACKING:
Arc-Zone® takes great pride in producing and delivering quality products. If your
product was damaged in transit, please contact your Arc-Zone® account manager
immediately.
After unpacking your new grinder, you should have these items:
• The Piranha 3 Heavy-duty Tungsten Grinding Machine from Arc-Zone
• Two Allen wrench’s sizes 7/64” and 1/8” for removing wheels.
• Operations manual, and other materials. Please read manual before proceeding.
Place the grinder on a flat surface with enough free space on each side for proper
ventilation and to allow you to comfortably prepare electrodes. Make sure the power
switch is in the off position (pointing down) plug the grinder into a “grounded” electrical
outlet. Switch the power on and you are ready to begin preparing precision ground
electrodes!
DESCRIPTION:
The Arc-Zone® Heavy-duty Precision Tungsten Grinding Machine is an affordable
solution for preparing precision ground tungsten electrodes quickly and easily.
Precision electrode grinding benefits:
• Long-lasting diamond wheel delivers consistent high-quality longitudinal ground
finish.
• Comprehensive included grind angle (taper) adjustment up to 60°.
• Tip-flat grinding option allows for simple tip-flat preparation.
• Universal collet accommodates .040” (1.0mm), 1/16” (1.6mm), 3/32” (2.4mm),
1/8” (3.2mm, 5/32” (4.0mm) and 3/16” (4.8mm) electrodes.
• Tungsten notching -- cutting option.

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The Piranha 3 Heavy-duty Precision grinding machine allows operators to diamond
grind electrodes consistently and accurately for improved weld quality and increased
productivity. Precision ground electrodes deliver extended arctime, minimized arc
wander, electrode spitting, shedding and weld inclusions.
SPECIFICATIONS:
Motor: ¼ HP- 3000 RPM - 2.5 Amps – 115 Volts @ 60 HZ
Optional 220Volt, 50/60 Hz motor available, specify when ordering.
Grinding Wheels: Single sided diamond impregnated: Available in 300, for
electrodes from 3/32” (2.4mm) to 3/16” (4.8mm) and 600 grit, for electrodes from .040
(1.0mm) to 1/16” (1.6mm)
Weight: 38lbs. (83.6kg)
WARRANTY:
The Piranha 3 Heavy-duty Precision Tungsten Grinder from Arc-Zone.com comes with
a one-year parts and labor warranty (excluding diamond wheel). This warranty
excludes “excessive” abuse or improper handling. Note: This is a precision machine
and should be treated accordingly.
SAFETY INFORMATION: Read Safety Precautions Carefully.
Note: This Precision Machine Is Designed To Grind Tungsten Electrodes Only!
• When not grinding electrodes, turn grinder off for safety purposes decreased wear
on the precision electric motor.
• Wear proper safety apparel. Do not wear loose clothing, neckties, rings, bracelets,
or other jewelry, which may get caught in the machine.
• Wear safety glasses and face mask.
• Never operate power tools when tired, intoxicated, or when taking medication that
cause drowsiness.
• Use a grounded three-prong-plug, and plug directly into a three-prong-outlet.
• Keep visitors a safe distance from work area.
• Always unplug grinder prior to inspection.
• Read this manual thoroughly for specific adjustments and operating procedures.
• To ensure consistent electrode preparation, replace damaged parts.

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SAFETY INFORMATION (continued)
• Make sure that the grinder is off before plugging it in.
• Do not apply extreme force to the tungsten while grinding. This may cause your
grinder to jam or cause premature grinding wheel wear.
• Never leave the grinder unattended while running.
• Turn the grinder off first and do not leave it until it comes to a complete stop.
• Know your grinder; learn its operation, applications and limitations.
PREPARING TO GRIND ELECTRODES
THE SET UP PROCEDURE:
With the power turned off, select the Included
Angle you would like to grind. Loosen the
Angle Adjusting Knob “A” on the Collet Arm ,
rotate on its axis until the Angle Pointer is
directed at the Grind Angle Scale, re-
tightening Knob .
Insert tungsten through the appropriate Collet
Hole in the Universal Collet, observing the
height at which the tungsten contacts the
wheel.
Loosen Knob “B“ to adjust the Electrode
Contact Point. The electrode should be as
close to the top of the wheel as possible.
After continuous grinding, you will begin to
wear a grove in the wheel. Adjusting knob “B”
moves the contact point down to a new spot
on the wheel.
NOTE: Diamond Grinding wheels are specifically designed for grinding tungsten
electrodes only!

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SETTING THE TIP FLAT GAUGE:
Note: The left gauge hole is for 3/32” diameter and smaller electrodes and the right
gauge hole is for electrodes larger than 3/32” in diameter.
With electrode extending to the desired length, tighten the electrode wand.
Loosen Nut D on the Tip Flat Gauge
and insert electrode into the Tip Flat
Gauge.
Rotate Knob C until the Stop makes
contact with the electrode tip, then lock
in place with
Nut D.
To duplicate electrode Tip Flat
diameter, insert electrode into
electrode wand. Extension should be beyond the desired final length.
Adjust electrode wand so there is a slight drag on the extended electrode.
Insert electrode into Tip Flat Gauge and slide until the nose of the electrode wand
contacts the Gauge face. Secure electrode into position by tightening the electrode
wand.
GRINDING:
After the set up procedure, you are now ready to prepare precision ground tungsten
electrodes quickly and easily. Turn Power Switch On: Insert tungsten into the proper
Collet Hole in the Universal Collet.
Lightly contact the wheel with the tungsten and rotating the electrode in a steady
manner until you achieve the desired Grind Angle or Tip-Flat. Be patient and Do Not
gouge or force the electrode into the wheel by trying to grind the electrode too quickly.
Gouging the electrode into the wheel causes excessive wheel wear and inconsistent
electrode finish.

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Approximate Electrode Grinding Time:
.040” (1.0mm) 5 to 10 seconds
1/16” (1.6mm) 10 to 15 seconds
3/32” (2.4mm) 20 to 30 seconds
1/8” (3.2mm) 45 to 60 seconds
5/32” (4.0mm) 70 to 90 seconds
3/16” (4.8mm) 100 to 130 seconds
Note: Silicone carbide wheels will contaminate the tungsten and should not be used.
Total electrode length is critical to high-quality automated, orbital and fixture mounted
welding operations. Please refer to your equipment manufacturers specifications to
ensure consistent performance.
NOTCHING YOUR ELECTRODE
The notching feature is located at the right hand side of your unit. This feature is
provided to notch your electrodes so they can be re-sized, or to remove the
contaminated portion of a spent electrode.
Never snap your electrode without notching it first, as this will cause splintering which
can result in contamination of your weld.
Insert your electrode through one of the two openings
and push through so the electrode exits from the
opposite opening. Hold both ends and push the
electrode towards the corner of the rotating wheel.
Once you have notched enough of your electrode on
one side, rotate the electrode to notch the other side.
Use the Tip/Flat Block to flatten the end of your
electrode and proceed to grind as normal.

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REPLACEMENT WHEELS:
Heavy-duty replacement diamond wheels are available directly from Arc-Zone® and can be
ordered online at: www.arc-zone.com , by phone: [phone] (toll free),
1.760.931.1500 (worldwide) or fax your order to: 1.760.931.1504.
Select the proper wheel using the Replacement Wheel Guide.
Wheels are in stock for immediate delivery.
REPLACEMENT WHEEL GUIDE:
• For optimum wheel life and surface finish when grinding .040” (1.0mm) through
3/32” (2.4mm) electrodes: Use a 600 Grit Diamond Wheel.
Part Number: A-PTG-6-600 -- (600 grit).
• For optimum wheel life and surface finish when grinding 3/32” (2.4mm) through
3/16” (4.8mm) use a 300 Grit Diamond wheel.
INSTALLING REPLACEMENT GRINDING WHEELS:
Please use the following steps to remove and replace diamond grinding wheels:
1. Turn power off and unplug the electrical outlet. Wait until the motor comes to a complete
stop.
2. Unscrew and remove Knob “A” (see picture of adjusting knobs). Lift up and remove the
Arm, taking care not to loose the washer between the Arm and the Knob. Set them
aside.
3. Unscrew the Thumb Screws on the Wheel Cover. Remove the Wheel Cover to fully
expose the wheel.
4. Using the supplied Allen Wrench, loosen the Wheel Mounting Screws.
5. Remove the old Wheel and mount the replacement Wheel on the Wheel Arbor.
6. Replace all of the other parts in reverse order used to remove them.

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Heavy-duty Replacement Wheel Price List:
All prices are FOB Arc-Zone. Products listed above are stock items, consult factory for specialty
wheels and accessories not listed. Prices are subject to change without notice.
Please see the parts list on the next page for information on additional replacement parts.
Part No. Description Price
A-PTG-3-300
(DGP-PG1425) Double-sided Precision Diamond Grinding Wheel: 3” (76.2mm) Diameter, 300-Grit $161.96
A-PTG-3-150
(DGP-PG1426) Heavy-duty, Double-sided Diamond Grinding Wheel: 3” (76.2mm) Diameter, 150-Grit $299.00

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Arc-Zone® INTRODUCES:
ArcTime™ All-Purpose™ Tungsten Electrodes
• State-of-the-art oxides scientifically formulated for balanced migration and evaporation rates
guaranteed to extend electrode arctime.
• Increased number of arc starts before re-sharpening and fewer misfires.
• Increased productivity saving you money and time.
• Lower work function requires less energy to start than 2% Thoriated, runs cooler and lasts
longer.
• Proprietary non-radioactive formulation.
• FREE Sample available upon request to qualified customers.
• FREE Guide to Selecting Tungsten.
State-the-Art Alloys in a
New Non-Radioactive Tungsten!