Welding machines column rectilinear down, are built in the basic versions: SD Series points with power 30 ÷ 50 KVA to 50%, SDP Series with power projection 60 to 180 KVA to 50%. Carpentry structure of maximum robustness and rigidity. Plant integral water cooling of the transformer, electrode holders and electrodes. The basic versions are fitted with a pneumatic cylinder-way, dual hand control security and pedals. On request cylinder double stroke. Wide range of electrode holders and electrodes for various special applications.