Hobart Champion 4500 Electrode and Amperage Selection Chart, Striking an Arc Tapping Technique

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11-2. Electrode and Amperage Selection Chart

ELECTRODE

DIAMETER

AMPERAGE RANGE

50

100

150

200

250

300

350

400

450

ELECTRODE

DC*

AC

POSITION

PENETRATION

USAGE

6011

7/32

3/32

6010

1/8

5/32

&

3/16

1/4

6010

EP

ALL

DEEP

MIN. PREP, ROUGH

1/16

6011

EP

ALL

DEEP

HIGH SPATTER

5/64

6013

EP,EN

ALL

LOW

GENERAL

3/32

6013

1/8

7014

EP,EN

ALL

MED

SMOOTH, EASY,

5/32

FAST

3/16

7018

EP

ALL

LOW

LOW HYDROGEN,

7/32

STRONG

1/4

FLAT

SMOOTH, EASY,

3/32

7024

EP,EN

HORIZ

LOW

FASTER

FILLET

1/8

NI-CL

EP

ALL

LOW

CAST IRON

7014

5/32

308L

EP

ALL

LOW

STAINLESS

3/16

7/32

*EP = ELECTRODE POSITIVE (REVERSE POLARITY)

1/4

EN = ELECTRODE NEGATIVE (STRAIGHT POLARITY)

3/32

1/8

7018

5/32

3/16

7/32

1/4

3/32

1/8

7024

5/32

3/16

7/32

1/4

3/32

Ni-Cl

1/8

5/32

3/16

3/32

308L

1/8

5/32

Ref. S-087 985-A

11-3. Striking an Arc – Scratch Start Technique

1	1	Electrode
	2	Workpiece
	3	Arc
	Drag electrode across workpiece
2	like striking a match; lift electrode
	slightly after touching work. If arc
	goes out electrode was lifted to
	high. If electrode sticks to work-
3	piece, use a quick twist to free it.

		S-0049

11-4. Striking an Arc – Tapping Technique

1	1	Electrode
	2	Workpiece
	3	Arc
	Bring electrode straight down to
2	workpiece; then lift slightly to start
2	arc. If arc goes out, electrode was
	lifted too high. If electrode sticks to
	workpiece, use a quick twist to free it.
3
		S-0050

OM-4418 Page 31

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Contents Description OM-4418210 597AProcesses From Hobart to You Table of Contents Page Fumes and Gases can be hazardous Marks a special safety messageArc Welding Hazards Electric Shock can killEngine Hazards Compressed Air Hazards EMF Information Principal Safety StandardsLES Fumées ET LES GAZ peuvent être dangereux Signification des symbolesConsignes DE Sécurité Lire Avant Utilisation UN Choc Électrique peut tuerLE Bruit peut affecter l’ouïe LE Soudage peut provoquer un in- cendie ou une explosionDES Particules Volantes peuvent blesser les yeux DES Pièces Chaudes peuvent provoquer des brûlures graves’AIR Comprimé peut provoquer des blessures ’EXPLOSION DE LA Batterie peutDES Organes Mobiles peuvent provoquer des blessures LA Chaleur DU Moteur peut pro- voquer un incendieInformation sur les champs électromagnétiques Principales normes de sécuritéDimensions, Weights, And Operating Angles SpecificationsSymbol Definitions Weld, Power, And Engine Specifications100% Duty Cycle at 90 Amperes CC/AC Exceeding duty cycle can damage unit and void warrantyFuel Consumption Duty CycleVolt-Ampere Curves Generator Power CurveGrounding Generator To Truck Or Trailer Frame InstallationInstalling Welding Generator Oil Grounding Generator When Supplying Building SystemsEngine Prestart Checks 13 mm Full Gasoline Open ClosedPut terminals Connecting To Weld Output TerminalsSelecting Weld Cable Sizes 45 m 60 m 70 m 90 m 105 m 120 mControls See Section Operating the Welding GeneratorAmperage Selection Table For Stick Smaw Electrodes To Stop turn engine switch to OffDescription Of Controls See Section 240 V 20 a AC Duplex Receptacle RC1 Generator Power Panel ReceptaclesOperating Auxiliary Equipment Use GFCI-protected extension cordMaintenance Stop engine Servicing Air CleanerClean element by gently tapping on a hard surface Washing PrecleanerWelding TroubleshootingTroubleshooting Generator PowerStarting difficult With proper viscosity oil for operating temperatureEngine Circuit Diagram For Welding Generator Electrical DiagramsSelecting Equipment Generator Power GuidelinesAmperes x Volts = Watts Grounding When Supplying Building SystemsHow Much Power Does Equipment Require? Earth ground if supplyingFarm/Home Equipment Rating Starting Watts Running Watts Approximate Power Requirements For Industrial MotorsApproximate Power Requirements For Farm/Home Equipment Industrial Motors Rating Starting Watts Running WattsContractor Rating Starting Watts Running Watts Approximate Power Requirements For Contractor EquipmentKVA/HP x HP x 1000 = Starting Amperage Power Required To Start MotorHow Much Power Can Generator Supply? Single-Phase Induction Motor Starting Requirements Work like a Pro Typical Connections To Supply Standby PowerCurrent Load Watts Amperes Selecting Extension Cord Use Shortest Cord PossibleStick Welding Smaw Guidelines Stick Welding ProcedureWeld current starts when electrode touches work- piece Striking an Arc Tapping Technique Electrode and Amperage Selection ChartStriking an Arc Scratch Start Technique 10-30 9090 End View of Work Angle Poor Weld Bead CharacteristicsGood Weld Bead Characteristics Positioning Electrode HolderElectrode Movement During Welding Conditions That Affect Weld Bead Shape16 in 30 1.6 mm Tack Welds Butt JointsLap Joint Tee JointPossible Causes Corrective Actions Troubleshooting PorosityTroubleshooting Excessive Spatter Weld TestTroubleshooting Excessive Penetration Troubleshooting Incomplete FusionTroubleshooting Lack Of Penetration Troubleshooting Distortion Troubleshooting Burn-ThroughTroubleshooting Waviness Of Bead 35 36 Parts ListDia Part Description Quantity Mkgs Work like a Pro Page Page Support ServiceHobart Welding Products Contact your Distributor for