Springs use little material, yet equipment time, setup loss, special processing and quality requirements often dominate cost. Understanding the drivers enables meaningful cost reduction.
Complex geometry adds setup
Multi-angle bends, long legs, special hooks and compact 3D forms require more stations, tools and development, with a larger effect on low-volume first runs.
Tolerance drives correction and sorting
Requirements beyond stable capability may need secondary setting, dedicated gauges or full inspection. Tightening drawing numbers alone does not improve function.
Secondary processes add lot costs
Grinding, heat treatment, peening, plating, cleaning and packaging have minimum lots and handling loss, while adding lead time and process risk.
Reduce cost from function
Identify critical loads and fits, relax reference features, consolidate material and finishes, and provide stable forecasts instead of focusing only on raw material price.
References
This article is informed by public standards catalogues and industry engineering resources. Project values should be confirmed by drawings, material certificates and sample validation.