It is a process in which we rub the metal surface with a hard
tool by applying sufficient
pressure. This leads to the plastic
deformation of the surface materials
which flattens the metal surface.
This process produces a good surface
finish. It can produce a surface
finish of 0.05 to 0.2 μ Ra
in one pass at a feed rate of
Types of burnishing tools:
Internal diameter burnishing tool.
External diameter burnishing tool.
Taper burnishing tool.
Face burnishing tool.
Advantages of burnishing:
Finer finish in one pass.
Attachable to any standard machine
Longer tool life.
No operator skill is required
Reduced noise level.
Faster production rate.