A piston ring with a multi-layer coating. The outer layer is optimized for break-in and the inner layer is designed for durabilitiy.
Measured via Zygo ZeGage Plus (10X)
Data source: Lake Speed Jr., www.speediagnostix.com
Data format: .os3d (open with OmniSurf3D)
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How to cite
If you use this dataset, please reference it as follows:
Digital Metrology Solutions. “Surface Library.” Digitalmetrology, digitalmetrology.com/dataset/piston-rings-variable-hardness. Accessed Feb 15, 2026.