perfect fit.
every
time.
“With years of hands-on experience in tube bending, TIG welding, and fabrication as an industrial electrician, I bring a practical understanding to every CAD design. Combining digital precision with real-world application is something I truly value.” — Stian Marthinsen | CEO & Founder of Smi3D AS
CAD Tube Bending & Roll Cage Engineering – Østfold & Oslo
Smi3D AS specializes in precision CAD tube modeling for high-performance motorsport and heavy industry across Østfold, Oslo, and nationwide. By designing directly around highly accurate 3D scan data, we engineer complex tubular structures and deliver exact CNC bending coordinates (XYZ/LRA) and laser-cut profiles for perfect fitment with zero material waste.
Roll Cages
Engineered to strict NBF (Norwegian Motorsport Federation) safety standards using high-grade German E355 seamless structural steel. Precision-bent via BendTech software to ensure exact chassis contouring, maximum occupant safety, and optimal structural rigidity. Standardized in 45.0 x 2.5 mm and 40.0 x 2.0 mm tubing.
Crash & Bash Bars
Custom impact protection built specifically for drift and race applications. Modeled in CAD to clear aftermarket intercoolers, radiators, and fiberglass body kits. Built from durable E355 steel tubing with tight notch alignment and clean TIG welding.
Hand Railing
Custom architectural and industrial railings fitted via 3D spatial scanning. We capture the exact site geometry, including stair angles and mounting points – to design, bend, notch, and weld a seamless handrail that installs without on-site modifications.
Custom Tube Bending
Bespoke tubular fabrication for off-road vehicles (ATV/UTV), marine hardware, subframes, and architectural structures. Bring your own CAD designs or let us handle the entire 3D scan, CAD design, bending, and TIG welding process from start to finish.