Surface roughness estimation techniques for drilled Surfaces: A review

Drilling is the process of removing the material and is a pre-processing step for various operations like reaming, boring, and tapping. The surface of the drilled hole has an impact on the performance of the component product. Surface roughness also determines the life cycle of the manufactured product. There are two ways for measuring surface roughness: Contact and non-contact methods. The contact approach employs stylus devices that must come...