FRISA

Forged hollow bars

An optimized power

The inside diameter of our hollow bars is forged into the parts, not bored from solid bars, creating exceptional time reduction and effectiveness. Forging these parts as a single component allows us to guarantee high-quality strength. Plus, hollows provide a versatile and efficient solution for several construction and mechanical applications. Some of the product advantages include cutting waste and improved integrity.

BENEFITS

• Our custom-made hollow forged bars are a higher quality substitute for heavy wall steel pipe and mechanical tubing.
• They can replace centrifugal castings that often do not meet internal strength and integrity desired.
• At FRISA, we can forge hollows with special configurations and geometries such as squares with a hole in the center, or hollows with different sizes on the outside diameter.

PROCESS

The inside diameter of our hollows is forged into the parts, not bored from the bars.

• First, an ingot cut is pressed to make a preform, then a hole is punched on the center.
• Second, using a mandrel, the material is expanded until its desired dimensions are reached.
• Additionally, we manufacture hollow tubes using the back-extrusion process that forces the preform to flow into a die in the opposite direction of the tool.