A forged or cast part, specific to each type of rolling stock: re-coating the contact surface restores the original operational clearance.
These connecting components between the bogie frame and the car body—or between the bogie components themselves—undergo wear due to continuous friction under heavy cyclic loads, with wear concentrated on the contact surface while the rest of the part remains dimensionally stable.
DED allows these worn contact surfaces to be rebuilt with a wear-resistant alloy, restoring the original operational clearance without replacing a costly forged or cast part that is specific to each type of rolling stock.
This repair method is particularly relevant for fleets of older rolling stock, where standard replacement parts are not always readily available. Precise control of the deposit ensures compliance with the fit tolerances necessary for proper dynamic performance of the bogie.
