Purpose: The burnishing is chip less machining which can be used to improve the surface roughness and surface
hardness on any metal work piece. The purpose of the research was to demonstrate the multi roller burnishing process
on non ferrous metals namely Aluminum, Brass and Copper to improve surface roughness and surface hardness.
Design/methodology/approach: The experiments were carried on non-ferrous metals in a vertical milling
machine with various spindle rotations, feed rate and depth of penetration.
Findings: The surface roughness on various no-ferrous metals improved by high spindle rotations with high
feed rate and depth of penetration.
Research limitations/implications: Due to high spindle rotations with multi roller in action, the vibration of
the equipment could not be controlled. Some mechanisms have to be devised to reduce the vibrations. However,
it is not in the scope of this research.
Practical implications: The experiments were conducted with out coolant and this is added advantages for the
environment and pollution free.
Originality/value: The burnishing process can be carried in a lathe and vertical/ horizontal milling machines
with suitable fixtures to hold the work piece. The research can be continued on hard metals with varying
hardness to find the surface roughness improvement. It is an eye opening for researchers to continue.
Keywords: Machining; Multi-roller burnishing; Surface roughness; Micro hardness