Copper Wire

Copper wire is a non-ferrous metallic filament whose ductility and electrical conductivity are useful only when wear, transfer and surface marking are acceptable. Direct data: Density: 8.96 g/cm³; Wire diameter: 0.05–0.40 mm; Electrical conductivity: about 100% IACS for pure copper; Brush operating range: -20–150°C; Hardness: about HV 40–110.

Soft conductive contact, light oxide removal and polishing where steel wire would be too aggressive.

Copper Wire changes brush stiffness through filament diameter, free trim, density, crimp, and contact. Use finer filament and longer trim for conformable contact; use coarser filament, shorter trim, or higher density for stronger displacement or cutting.

Compare Copper Wire with Compare with brass for greater spring and wear, phosphor bronze for resilience and stainless steel for aggressive corrosion-resistant cutting. Change material when wet stiffness, temperature, chemical resistance, conductivity, particle shedding, or surface marking becomes the limiting factor.