Coining

Coining represents the most extreme and precise bending method available on a press brake, using extremely high tonnage to plastically deform the material into the exact shape of the punch and die cavity. Unlike air bending or bottom bending, coining permanently sets the material at the desired angle with virtually zero springback, making it ideal for critical tolerance applications.

The tonnage required for coining can be 5 to 10 times higher than air bending, which limits its practical use to thinner gauges and smaller parts on most press brakes. Coining produces the most consistent bend angles of any method, which is why it's favored for high-precision parts in electronics enclosures and aerospace brackets.

The extreme force involved also means that tooling wear is accelerated, so shops must balance the quality benefits against higher tooling replacement costs.