Edge Quality
Conventional stamping produces a shear zone followed by a fracture zone, leaving an angled, torn edge across roughly a third to half of material thickness. Fine blanking's three-force process keeps the material in compression through the full thickness, producing a smooth, near-vertical shear face across the entire cut.
Tolerance & Flatness
Fine blanked parts typically hold tighter flatness and dimensional tolerance than conventionally stamped parts of similar size, because the counter-pressure system controls part distortion during the cut.
Tooling & Press Cost
Fine blanking dies and presses cost more than conventional stamping equivalents, due to the added guiding precision and three-force hydraulic system required. This premium is typically justified when secondary machining or grinding would otherwise be required.
When to Choose Which Process
| Factor | Fine Blanking | Conventional Stamping |
|---|---|---|
| Edge quality | Smooth, perpendicular shear face | Angled, partially fractured edge |
| Flatness | Excellent, controlled by counter-pressure | Moderate, can require flattening |
| Tooling cost | Higher | Lower |
| Best fit | Precision gears, hardware, connectors | Brackets, enclosures, general stampings |