Luther's Welding & Fabrications

Custom Skeleton Fabrication for the Yacht Industry

Custom Skeleton Fabrication for the Yacht Industry
Custom Skeleton Fabrication for the Yacht Industry

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Alerion Yachts commissioned Luther's Welding & Fabrications to build the rudder skeleton for their yacht model Express 20 club racer. The yacht’s rudder had to be rugged enough to handling high speeds in a tough marine environment; this required a rudder skeleton that is rigid and precise.

To meet these criteria, our design engineers first modeled the assembly using SolidWorks. Marine environments are a harsh atmosphere for metals, and therefore the material choice was stainless steel type 316 because of its superior overall resistance to corrosion and pitting. It also has excellent welding and forming characteristics.

Manufacturing began with preparing the assembly cut list using various machining processes, including a band saw, to cut 5 tubes to 40.56" length, 10 bars to 8.56" length and 5 bars to 7" length. Using a CNC drill, features and holes were predrilled prior to the tube bending process to bend the parts according to spec, including the 18", 11 gage sheets, all of which was them TIG welded.

This rudder skeleton demonstrates the diversity of our manufacturing and product capabilities. At Luther’s Welding & Fabrications, we have a reputation for quality, workmanship and customer service that is known throughout the marine industry. We deliver products that meet guidelines and standards for European CE, NMMA and ABS Welding certifications. Our staff consists of marine engineers, welders, machinists and fabricators with over 20 years’ experience in the industry.

To learn more about this project, or about our other capabilities and services, see the table below or contact us directly.

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Custom Skeleton Fabrication Highlights

Product Description
Alerion Express 20 Rudder Shaft
Capabilities Applied/Processes
  • Band Saw Cut
  • Drilled in CNC Machining Center
  • TIG Welding
  • Bending
Equipment Used to Manufacture Part
CNC Machine
Overall Part Dimensions
  • (5) 40 9/16" Long
  • (10) 8 9/16" Long
  • (5) 7" Long
  • (5) 1/1/2" X 18"
Material Used
  • Wall Stainless Steel T316 Tube
  • Stainless Steel T316 Round Bar
  • 11 GA Stainless Steel T316 Sheet
Industry for Use
Delivery Location
U.S. Watercraft
Standards Met
Customer Specifications
2D CAD Drawing
NMMA for Marine Tank Fabrications
CE for European Marine Tank Fabrications
ABS Welding Certifications

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