Angle Rolling 

Angle rolling is a metal‑forming process used to bend angle iron (also called angle bar or L‑angle) into curved shapes while keeping its cross‑section intact. Angle iron looks like an “L” in profile, and angle rolling lets manufacturers curve that L‑shaped piece into arcs, circles, or custom bends.

The process uses a section rolling machine (also called an angle roller or profile bender) with three powered rollers:

• The angle iron is fed between the rollers

• Pressure is applied to gradually bend the metal

• Multiple passes create a smooth, consistent curve

The operator can roll the angle in different orientations, which dramatically affects the final shape.

Common Rolling Orientations

Leg‑in The inside of the “L” faces the center of the curve Tighter, more stable curve

Leg‑out The outside of the “L” faces the center Larger radius, more spring back

Heel‑in The corner (heel) faces the center Strong structural curve

Heel‑out The corner faces outward Often used for architectural curves

Angle‑rolled components show up everywhere:

• Architectural arches and curved facades

• Handrails and guardrails

• Structural frames

• Industrial equipment

• Transportation (trailers, shipbuilding, railings)

If you’ve ever seen a curved metal frame with an L‑shaped profile, angle rolling probably made it.

Angle rolling allows builders and fabricators to:

• Create strong curved structures

• Maintain the metal’s integrity

• Avoid welding multiple straight pieces

• Produce smooth, precise arcs

It’s a mix of engineering and craftsmanship.