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Featured Stories

Why Surface Roughness Specifications Are Shifting from Ra to Sa

Surface roughness directly impacts sealing performance, friction, wear, coating adhesion, fatigue life, and overall product quality. Yet many manufacturing specifications still rely on Ra, a parameter developed nearly a century ago from a single 2D measurement trace. As modern surfaces become increasingly engineered and complex, manufacturers are discovering that traditional roughness measurements do not always provide the complete picture.

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Beyond Dimensional Conformance: Using Measurements to Predict Miniature Assembly Performance

A miniature component can pass every dimensional check on its inspection report and still fail in the finished assembly. That apparent contradiction usually does not mean the measurement was wrong. More often, the inspection plan measured features that were convenient to reach, used a fixture that changed the part, or never linked the reported dimensions to the function that matters after mating, filling, sealing or closure.

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