GB/T 18778.1-2002

This standard specifies filtering and general measurement conditions for evaluating surface texture using the profile method, specifically for surfaces with stratified functional properties like honed cylinder bores or plateau-honed engine components. It is applied in precision manufacturing and quality control contexts, particularly in the automotive and mechanical engineering industries, to ensure consistent measurement of surfaces that combine rough and smooth characteristics. The standard defines the use of Gaussian filters and measurement parameters to accurately assess functional performance, such as wear resistance and lubrication retention.