Arc/MMA Welder EWM Pico 162 [Welding Equipment > Arc MMA Welder > ARC MMA Welder EWM Pico 162]
	Arc/MMA Welder EWM Pico 162 The EWM Pico 162 is a superior quality, high performance portable MMA/Arc welding machine supplied as a complete kit ready to go and features a three year warranty  MMA (Arc) inverter and TIG DC welding machine Required input: 16 Amps (240v) Welding Current range: 10 - 150 Amps 100% duty cycle @ 100 Amps 60% duty cycle @ 120 Amps 35% duty cycle @ 150 Amps Takes up to 4mm electrodes Portable with safe operation on a mains leads up to 50 m in length Unrestricted operation on generators Intelligent casing design and robust, impact-resistant plastic guarantees functionality and safety even if dropped or knocked Overvoltage protection - Accidental connection to 400 V mains voltage will not result in damage to the machine Ready to weld set: Electrode holder, earth lead, hand shield for welding, slag hammer, steel brush and an aluminium-framed hard topped case Arcforcing, hotstart, antistick 3 year parts and labour warranty Protection classification IP23 (open-air operation), S - safety sign (boiler welding) View the printable Picotig 162 MMA Welder Data Sheet
Code: EWM-091-002040-00502		£ 780.00 +VAT £ 936.00 inc VAT This is RRP price. Please call for latest price.
[Welding Equipment > Arc MMA Welder > ARC MMA Welder EWM Pico 162]

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Arc or MMA (Manual Metal Arc) Welding is the oldest example of currently used electric welding procedures, and perhaps the most straight forward to use and understand.

The principle of arc welding is simple; a relatively large current is passed through a welding rod (or filler rod) of the appropriate metal (Mild steel for welding steel etc.) and a circuit is completed through it when it comes into contact with the earthed metal being welded. The join between the welding rod and the work being welded creates an area of high resistance, which produces enough heat to melt the rod at that point. The rod is drawn along the work, creating a line of molten metal that solidifies to create a strong bond between the two metals being welded together. Higher currents are used for welding thicker metals – and require thicker rods.

If the current used is too low for the thickness of metal being welded the weld will not penetrate sufficiently into the metals, and hence will be weak. If the current is set too high, it is likely that the electrode (welding rod) will splatter (creating a messy weld) or at worst burn through the work.

As the temperature of the arc can reach as high as 6000oC, an amount of oxides are produced – these can cause problems as they form on the metals being welded, creating a barrier between the work and the filler rod. A layer of oxide both insulates the metals (meaning the arc cannot be struck) and may affect the strength and general quality of the weld. To overcome these problems, the filler rod is coated in flux which, when burned, produces a shielding gas that protects the metal from the oxygen in the air. The remains of the flux solidify on the metal in the form of "slag" – which also protects the weld against oxidation until it has cooled.

This layer can simply be chipped off with a welding hammer once the weld has cooled, and sometimes comes off by itself as the metal contracts.

As with all forms of welding and soldering, it is important that the areas of the work are cleaned thoroughly of impurities and oxide before welding takes place; this can be carried out with a wire brush, or abrasive paper.