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This is because of the slight bevel (4 to 6 degrees) in the cut face that plasma produces.
Also, at thicknesses above 1/2 inch, plasma has no cutting speed advantage over oxy-fuel.
Fabricators, contractors, maintenance personnel, artists and do-it-yourselfers who experience the benefits of a hand-held air plasma arc cutting machine rarely want to return to oxy-acetylene cutting or mechanical cutting processes such as saws, cut-off wheels, shears and snips.
Though a plasma cutter will certainly pay off in the long run with its speed and low operating costs if you need to cut a lot of metal, it can be daunting to select the right plasma cutter for your business or home workshop needs.
Most manufacturers provide duty cycle information in their literature.
It is not noticeable in thinner materials, but becomes more so as thicknesses increase.
The arc of a plasma cutter can reach temperatures of 45,000 degrees F and provide one of the fastest ways to cut metal.
In fact, the hardest part comes before ever striking an arc: selecting a machine that best matches your application and choosing the right accessories.
Obviously, for an experienced operator, ease of use allows a job to be done faster and more efficiently, but it may also means that people with little or no experience can get good results.
Are you planning to cut by hand or on a table? Some plasma cutting tools are capable of doing both, going from handheld to mechanized cutting and back again.
Generally speaking, the higher the amperage output of the plasma cutter, the greater the duty cycle is at lesser amperages.
They include cut capacity, cut quality, reliability, duty cycle, ease of use and operating cost.
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For example, if you mainly plan to cut ½-inch thick metal, and only occasionally cut metal that’s a little thicker (say 3/4 of an inch), then you can choose a ½-inch system.
In general, fabricators consider oxy-fuel to be superior to plasma for cutting steel when thicknesses exceed about 1/2 inch.
The general rule is to choose a system with a recommended cut capacity that matches the material thickness you plan to cut 80 percent of the time.
While many mention the advantages of plasma over oxy-fuel cutting, a plasma cutter requires a significant up front investment.
It was our final words about giant tech plasma cutter reviews