The choice of the right liner / wire guide spiral is of great importance, especially when conveying welding wires over long distances, as it is the case with the MECHAFIN Push Pull systems. For example, it is absolutely necessary to use Teflon liners for processing aluminium and stainless steel wires. With aluminium wire, higher friction can occur between the aluminium wire and the steel spiral, which then leads to increased abrasion. This can lead to clogging of the steel spiral. In the case of stainless steel wire, the abrasion of the steel spiral causes contamination in the weld joint, even if it is slight, and later rust spots.
Mechafin AG, based in Geroldswil, a suburb of Zurich, was founded in 1965 by Otto Schoch. It specialised early on in the development and production of shielding gas welding torches and wire feeders for demanding tasks. "The increased requirements of our customers are our daily challenge and motivation."