Cut Edge Zones
The rollover, burnish, fracture, and burr regions that make up a sheared edge.
What it means on the floor
A sheared edge has a characteristic profile: rollover (the rounded entry), a smooth burnished band where the material was in contact with the cutting edge, a rougher fracture zone where it broke, and the burr at the exit.
The proportion of burnish to fracture is a direct readout of die clearance — more burnish means tighter clearance, more fracture means looser.
Category: Stamping
Applying the term
Interpret Cut Edge Zones in the context of the drawing, governing standard, and customer requirement in front of you — the same word can carry different limits in design, quality, and production documents. Check whether a stated value is nominal, minimum, maximum, or reference-only, and whether it applies before forming, after forming, or after heat treatment.