Miller Electric DB1812R Amperage Range Gas Type Polarity, DC − Argon − Elec AC − Argon AC − Argon

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SECTION 5 − SELECTING AND PREPARING TUNGSTEN

ELECTRODE FOR DC OR AC WELDING

ac/dc_gtaw 2/2004

Y Whenever possible and practical, use DC weld output instead of AC weld output.

5-1. Selecting Tungsten Electrode (Wear Clean gloves To Prevent Contamination Of Tungsten)

 

 

Amperage Range - Gas Type- Polarity

 

 

 

 

 

 

Electrode Diameter

DC − Argon − Electrode

DC − Argon − Elec-

AC − Argon

AC − Argon −

 

Negative/Straight Po-

trode Positive/Rev-

 

Balanced Wave

 

larity

erse Polarity

 

 

 

 

 

 

 

 

 

2% Ceria (Orange Band), 1.5% Lan-

 

 

 

 

thanum (Gray Band), Or 2% Thorium

 

 

 

 

(Red Band) Alloy Tungstens

 

 

 

 

 

 

 

 

 

.010”

Up to 25

*

Up to 20

Up to 15

.020”

15-40

*

15-35

5-20

.040”

25-85

*

20-80

20-60

1/16”

50-160

10-20

50-150

60-120

3/32”

135-235

15-30

130-250

100-180

1/8”

250-400

25-40

225-360

160-250

5/32”

400-500

40-55

300-450

200-320

3/16”

500-750

55-80

400-500

290-390

1/4”

750-1000

80-125

600-800

340-525

 

 

 

 

 

Pure Tungsten

 

 

 

 

(Green Band)

 

 

 

 

 

 

 

 

 

.010”

Up to 15

*

Up to 15

Up to 10

.020”

5-20

*

5-20

10-20

.040”

15-80

*

10-60

20-30

1/16”

70-150

10-20

50-100

30-80

3/32”

125-225

15-30

100-160

60-130

1/8”

225-360

25-40

150-210

100-180

5/32”

360-450

40-55

200-275

160-240

3/16”

450-720

55-80

250-350

190-300

1/4”

720-950

80-125

325-450

250-400

 

 

 

 

 

Zirconium Alloyed Tungsten (Brown

 

 

 

 

Band)

 

 

 

 

 

 

 

 

 

.010”

*

*

Up to 20

Up to 15

.020”

*

*

15-35

5-20

.040”

*

*

20-80

20-60

1/16”

*

*

50-150

60-120

3/32”

*

*

130-250

100-180

1/8”

*

*

225-360

160-250

5/32”

*

*

300-450

200-320

3/16”

*

*

400-550

290-390

1/4”

*

*

600-800

340-525

 

 

 

 

 

ENGLISH

Typical argon shielding gas flow rates are 15 to 35 cfh (cubic feet per hour).*Not Recommended.

Figures listed are a guide and are a composite of recommendations from American Welding Society (AWS) and electrode manufacturers. OM-1603 Page 9

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Contents Diamondback Series Gtaw Torches Table of Contents Gtaw Torch Hazards −SAFETY Precautions for Gtaw Torches − Read Before UsingSymbol Usage About Pacemakers EMF InformationDuty Cycle − SpecificationsSpecifications Installing Tungsten − InstallationRequired Torch Parts And Torch Assembly International Style Connector AssemblyConnecting Torch Connections Disconnect torch before maintaining Hours − Maintenance & TroubleshootingRoutine Maintenance TroubleshootingEssary DC − Argon − Elec AC − Argon AC − Argon − Amperage Range Gas Type PolarityClamp as close to the weld as possible − Guidelines for TIG Welding GtawPreparing Tungsten Electrode For Welding Positioning The TorchTungsten With Filler Rod Torch Movement During WeldingPositioning Torch Tungsten For Various Weld Joints Tungsten Without Filler RodComplete Torch Assembly − Parts ListQuantity 198 English Page Support ServiceOwner’s Record

DB1812R, DB1825R specifications

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