Copper is soft and unforgiving of excessive force, and this video shows an automatic shaft straightener for copper bar set up specifically for non-ferrous work. Soft contact pads, reduced ram pressure and closely spaced supports spread the correction load so the bar is straightened without bruising, galling or work-hardening the bright surface that copper buyers inspect first.
The CNC measures each copper bar at 2–3 points for short lengths and 5+ points for long bars — long beds fitted with 5–8 probes — then applies low-force correction in 20–90 second cycles. The machine accepts stock in the Ø5–600 mm range, with lengths between 100 mm and 12 m, holding 0.10–0.30 mm/m for general copper bar and 0.02–0.05 mm on electrical and precision applications.
Straight, unmarked copper bar is required by electrical busbar makers, switchgear and transformer builders, welding equipment manufacturers and precision machining shops producing connectors, terminals and conductive shafts — parts where surface damage means scrap. The video compares a bar straightened with standard steel settings against one run with the copper setup, making the difference in surface condition immediately visible at the discharge rack.
Read why measurement strategy matters in our guide to TIR and straightness, look through the Bar & Tube Straightening Machine pages, or send copper samples for a surface-safe trial run.
Soft pads and low ram pressure protect soft copper surfaces
Closely spaced supports prevent bruising and galling
2–3 measurement points on short bars, 5–8 on long beds
0.02–0.05 mm straightness for electrical-grade copper
Automatic 20–90 second correction cycles for every bar
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