Surface texture describes the detailed characteristics of a surface including roughness, waviness and form. These properties are critical in engineering design as they affect friction, wear, sealing performance and fatigue strength.
This section provides engineering reference information on surface finish measurement, symbols used on drawings and typical surface texture values used in manufacturing processes.
The surface texture is the local deviations of a surface from its ideal shape e.g perfect flat shape, perfect cylindrical shape, spherical shape etc. The measure of the surface texture is generally determined in terms of its roughness, waviness and Form .
Surface texture is the deviation of a real surface from its ideal geometric form. It is typically broken down into three components:
Surface finish plays a critical role in engineering performance. It influences friction, lubrication behaviour, wear resistance and fatigue life. In precision components, surface finish also affects sealing performance and dimensional accuracy.
The following pages provide detailed engineering data, symbols and examples related to surface texture and finish:
| Surface Texture Notes | Surface Finish Symbols | Surface Texture Examples | Surface Texture Equivalents |