Could be...but Ra wouldn't tell you anything specific about the surface itself...only that something (tool life, coolant, etc) has changed in the process.
Rmax and Rz will give an assesment of the functionality of the surface.
Could be...but Ra wouldn't tell you anything specific about the surface itself...only that something (tool life, coolant, etc) has changed in the process.
Rmax and Rz will give an assesment of the functionality of the surface.