Transcription of SURFACE FINISH GUIDELINES
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SURFACE FINISH GUIDELINES
FINDING THE OPTIMUM SURFACE FINISHTo achieve the optimum seal performance it is critical for themating hardware SURFACE FINISH to have defined characteristicsthat address the roughness, directional orientation or lay andhardness for reliable seal efficiency and life. As the Aerospaceindustry transitions from the traditional hard chrome platingtoward the use of HVOF (High Velocity Oxygen Fuel) coatings, thedefinition of an optimum SURFACE FINISH has also recently hard chrome plating had been effectively utilizedfor dynamic surfaces as the traditional coating method.
has recently been re-defined by the ISO specification. Simply, it is now the average of the highest peak to the deepest valley of five sampling lengths taken across an evaluation length of a surface
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