Helical Spiral Difference
Engineers, machinists, and designers often treat “helical” and “spiral” as interchangeable adjectives for anything that twists. In precision work the two words describe fundamentally different 3-D curves, each with unique load paths, tooling demands, and cost profiles. Ignoring the gap can turn a $200 prototype into a $20,000 scrap bin. This article dissects the helical-spiral…