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ISOARC gouging carbons are designed specifically for the air carbon arc metal removal process, which melts metal with an electric arc, then blows it away with a jet of ordinary shop compressed air. ISOARC carbons contain a precisely formulated blend of carbon and graphite that produces the most efficient metal removal performance. They offer excellent arc stability, superior metal removal rates, uniform diameter and clean slag – free grooves or cuts.
Available in a number of types and sizes, ISOARC carbons are ideal for a broad range of applications, such as creating Ugrooves for weld joint preparations, removing old welds, gouging out cracks, cleaning and repairing castings, removing hard
surface metal, and for rough machining.
They gouge, cut, bevel, pierce or flush off any metal including stainless steel, carbon steel, manganese steel, chrome-moly alloys, gray, malable and ductile iron, copper, aluminium, magnesium and nickel alloys – fast precisely and economically.
ISOARC carbons are made for use in any type of gouging torches connected to a D.C. power supply and compressed air source. The amperage required depends on the electrode diameter; an electrode is usually selected to make grooves or cuts
slightly larger than its diameter.
Features
- Excellent Arc Stability
- Superior Metal Removal Rate
- Uniform Diameter
- Clean Machinelike Grooves or cuts
- Greater overall Economy
Applications
- Machining U – Grooves for weld joint preparation
- Removing defective welds
- Cleaning and repairing metal castings
- Removing hard surface metal to facilitate repair
- Cutting non ferrous and other “hard to cut” metals
- Rough machining
Industries
Construction – Foundries – Metal Fabrication – Transportation Equipment - Machining and Machine Tools – Ship Building – General Maintenance
To employ the process you need:
- A D. C. Power Source
- A Gouging Torch
- “ISOARC” Gouging Carbons
- Compressed air (5.6 to 7 kg/cm²)
Process Description
The Air Carbon Arc process involves:
- The striking of an arc between the metal work piece and a gouging electrode
- The melting of metal through use of the arc, and
- Removal of the molten metal with compressed air that flows parallel to the electrode (air and current flow to the torch
through a special coaxial hose)
Technical Information
Electro Size and cutting performance
| Width of Groove | Rod diam x 1.4mm |
| Depth of Groove | Rod diam x 0.7mm |
Carbon Electrode STATRC Performance Standard
| Electrical Resistance | 19 µ Ω . m |
| Breaking Strength | 27 Mpa |
| Bulk Density | 1.57 g/cm3 |
| Ash Content | 0.8% |
| Water Content | 0.3% |
Current Selection by electrode size
| Carbon size in dia. (mm) | 6 | 7 | 8 | 9 | 10 | 13 | 16 | 19 |
| Minimum - Amps | 300 | 350 | 400 | 450 | 500 | 800 | 1000 | 1200 |
| Maximum - Amps | 350 | 400 | 450 | 500 | 600 | 1000 | 1200 | 1600 |
| Air - psi | 80 | 80 | 80 | 80 | 80 | 100 | 100 | 100 |
| Air - kg / cm² | 5.6 | 5.6 | 5.6 | 5.6 | 5.6 | 7.0 | 7.0 | 7.0 |
Material Removed Per Electrode
| Electrode size in dia. (mm) | 6 | 8 | 10 | 12 |
| GMS / Electrode | 350 | 600 | 950 | 1400 |
| * Effective length of electrode 300 mm | ||||
Current Selection Guide Chart
| Current | Indication | ||
| Current | Copper layer on electrode burns back approx . 20mm max | ||
| Too Low | Slow cutting and splittering arc. | ||
| Too High | Over - rapid burning of copper layer on electrode | ||
