Editorial scaffold

V-die selection: the 8x rule and when to break it

Editorial scaffold for choosing V-die openings from sheet thickness, flange length, inside radius, and tonnage constraints.

Published 2026-05-15Updated 2026-05-158x V-die rule

Outline

Define the common 6T, 8T, and 10T starting points.
Explain how die opening sets air-bend radius and minimum flange.
Cover when to go wider: high tonnage, marking risk, large radius, thick material.
Cover when to go narrower: short flange, tighter radius, machine/tooling approval.

Internal-link targets

FAQ

Is 8x thickness always the right V opening?

Planned answer: no. The article will frame 8T as a starting point that must be checked against radius, flange, tonnage, and tooling limits.