Burnishing is the best way to improve a surface finish, enhance part quality and eliminate costly finishing operations. Eliminate secondary operations, improve surface finish and save time and money with Elliott burnishing tools.
Burnishing is a chipless machining method which cold works the metal without cutting or abrading the surface.
It removes no metal but rather compresses, or “irons-out” the peaks of a metal surface into the valleys, generating a dense and uniform surface.
Roller burnishing improves surface finish and results in dimensional accuracy.
The cold working condenses the grain structure of metal, producing an increase in surface hardness from 50% to 100%, within a penetration of .010” to .030” on the part’s surface.
In roller burnishing, the material is elastically deformed to a given depth below the surface. The result is compressive stresses at the surface. In turn, this increases the resistance of the material to fatigue failure because any external forces must first overcome these residual stresses.
THE CHALLENGE This customer was manufacturing a shaft used in the oil industry made of Super Duplex stainless steel using a DMG Mori NTX2000 machine.