How do you select cutting speed and feed rate for machining operations?

Cutting parameters depend on: Material properties (harder materials need lower speeds), Tool material (HSS, carbide, ceramic have different ranges), Operation type (roughing vs finishing), Machine rigidity, and Coolant availability. General guidelines: Cutting speed (Vc) affects tool life and surface finish, Feed rate (f) affects material removal rate and surface roughness, Depth of cut (ap) affects forces and stability. Use manufacturer recommendations as starting point, then optimize through trials. Higher speeds with lower feeds give better finish; lower speeds with higher feeds maximize MRR.