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Products >> SPECIALTY ELECTRODES for SMAW and Gouging

 

AIR CARBON GOUGING ELECTRODES

 

COPPER COATED

AIR CARBON ARC GOUGING CARBONS

AIR CARBON ARC GOUGING DATA:

The air carbon arc process is flexible, efficient, and cost effective on practically any metal; carbon steel, stainless steel and other ferrous alloys; gray, malleable and ductile cast iron; aluminum; nickel; copper alloys and other nonferrous metals.  Single-phase machines with low open-circuit voltage may not work for air carbon arc gouging (CAC-A).  However, any three-phase welding power source of sufficient capacity may be used for air carbon arc gouging.  The arc voltage used in air carbon arc gouging and cutting ranges from a low of 35 to a high of 56 volts; thus the open-circuit voltage should be at least 60 volts.  The actual arc voltage is governed by arc length and the type of gouging.  For most applications CAC-A is used with DCEP (reverse polarity).  The electrode should extend at most 7 inches from the gouging torch with the air jet between the electrode and work piece.  A minimum extension of 2” should be used to prevent damage to the torch parts.  Normal compressed air pressures for CAC-A range between 80 psi and 100 psi at the torch; higher pressures may be used, but they don’t remove metal more efficiently.  Use 60 psi (413.7 kPa) with the light-duty manual torch.  The air hose supplying air to the torch body should have an inside diameter of at least 3/8” (6.4 mm).

 

SUGGESTED CURRENT RANGES FOR COMMONLY USED ELECTRODE TYPES AND SIZES

 

ELECTRODE DIAMETER

DC ELECTRODE WITH DCEP

AC ELECTRODE WITH AC

AC ELECTRODE WITH DCEN

In.

mm

Min Amps

Max Amps

Min Amps

Max Amps

Min Amps

Max Amps

1/8

3.2

60

90

-

-

-

-

5/32

4.0

90

150

-

-

-

-

3/16

4.8

200

250

200

250

150

180

¼

6.4

300

400

300

400

200

250

5/16

7.9

350

450

-

-

-

-

3/8

9.5

450

600

350

450

300

400

½

12.7

800

1000

-

-

-

-

5/8

15.9

1000

1250

-

-

-

-

¾

19.1

1250

1600

-

-

-

-

1

25.4

1600

2200

-

-

-

-

 

RECOMMENDED MINIMUM AIR REQUIREMENTS

Recommended Compressor Rating

                              Air Pressure     Air consumption   Intermittent Use    Continuous Use  ASME Receiver Sz

Type of Torch

psi

kPa

cfm

L/min

hp

kW

hp

kW

gal

litres

Light Duty (2)

40

280

8

227

.5

0.4

1.5

1.1

60

227

General Duty (2)

80

550

25

708

5.0

3.7

7.5

5.6

80

303

Multipurpose (3)

80

550

33

934

7.5

5.6

10

7.5

80

303

Automatic (4)

60

414

46

1303

 

 

15

11.2

80

303

 

1.  Pressure while torch is in operation.

2.  Accommodates flat electrodes.

3.  Generally considered a foundry torch

4.  Requires some kind of mechanical manipulation.

 

 

PERMISSIBLE NOISE EXPOSURE

Ear protection is recommended when noise from the air carbon arc process exceeds permissible levels as listed in OSHA 1910.95

 

Duration Per Day

Sound Level DBA (in hours) Slow Response

8

90

6

92

4

95

3

97

2

100

1 ½

102

1

105

¼ or less

115

 

BLUE DEMON WELDING PRODUCTS

 

 

 

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Products >> SPECIALTY ELECTRODES for SMAW and Gouging

 

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