A Guide for Machined PartsIn precision manufacturing, the final surface of a part is far more than a cosmetic detail ,  it’s a functional and performance critical attribute. Surface finishes affect friction, corrosion resistance, wear, and even how well components fit or seal together.What is a Surface Finish on machined parts?A surface finish (or surface texture) defines the microscopic topography left on a machined part after cutting, grinding, or polishing.